IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0937255
(2007-11-08)
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등록번호 |
US-RE43964
(2013-02-05)
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발명자
/ 주소 |
- Fischer, Larry G.
- Russell, David S.
- Wala, Philip M.
- Ratliff, Charles R.
- Brennan, Jeffrey O.
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출원인 / 주소 |
- ADC Telecommunications, Inc.
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인용정보 |
피인용 횟수 :
8 인용 특허 :
86 |
초록
▼
A method and apparatus for sectorizing coverage of a cellular communications area includes providing a remote unit having microcell antenna units. Each microcell antenna unit is configured to cover a particular sector. The remote unit is connected to a sectorized base station unit which is connected
A method and apparatus for sectorizing coverage of a cellular communications area includes providing a remote unit having microcell antenna units. Each microcell antenna unit is configured to cover a particular sector. The remote unit is connected to a sectorized base station unit which is connected to a mobile telecommunications switching office. Separate digitized streams representative of telephone signals received from the mobile telecommunications switching office are generated corresponding to the microcell antenna units and the separate digitized streams are multiplexed and transmitted to the remote unit. The remote unit demultiplexes the multiplexed digitized streams into the separate digitized streams corresponding to the microcell antenna units and the separate digitized streams are converted to RF signals for coverage of a particular sector by the corresponding microcell antenna unit. Separate digitized streams are separately generated for each microcell antenna unit representative of RF signals received at the microcell antenna unit for a particular sector. The separately generated digitized streams are multiplexed at the remote unit and transmitted to the sectorized base station unit. At the sectorized base station unit, the multiplexed digitized streams are demultiplexed into the separate digitized streams corresponding to microcell antenna units and the separate digitized streams are converted to RF signals for provision to the mobile telecommunications switching office. Diversity at the remote units is also provided.
대표청구항
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1. A method of sectorizing coverage over a cellular communications area divided into a plurality of microcells each covering a subarea of the communications area and being divided into a plurality of angular sectors having separate transmitters and receivers, the method comprising performing the fol
1. A method of sectorizing coverage over a cellular communications area divided into a plurality of microcells each covering a subarea of the communications area and being divided into a plurality of angular sectors having separate transmitters and receivers, the method comprising performing the following steps: receiving a number of information-bearing telephone signals from a mobile telecommunications switching office at a common base station serving the microcells within the cellular communications area;modulating the information-bearing telephone signals onto a plurality of different analog radio-frequency carriers representing a plurality of different channel sets for respective sectors of the microcells at the base station;combining the analog radio-frequency signals for all of the sectors into a single outbound analog signal within a predetermined radio-frequency band, representing all of the channel sets for all of the sectors;converting the single outbound analog signal directly to a single outbound digital representation at the base station;sending the outbound digital representation of the radio-frequency signal via a transmission means to a remote unit located in or near the subarea of at least one microcell;at the remote unit, converting the outbound digital representation directly to a single analog representation of the entire outbound single radio-frequency signal within the same radio-frequency band and containing each of the plurality of channel sets;sending each of the plurality of channel sets to a different one of a plurality of antenna units for the microcell, each of the antenna units being positioned so as to cover a different angular sector of the microcell;at the antenna unit covering each sector of the microcell, receiving telephone signals within the radio-frequency band for the channel set of that sector;sending the received telephone signals to the remote unit;at the remote unit, combining all the received telephone signals from all the sectors to a single combined analog radio-frequency received signal containing all the channel sets for the microcell;converting the single combined radio-frequency received signal directly to a received digital representation of the radio-frequency band of the channel sets for the sectors;sending the received digital representation via the transmission means to the base station; andat the centrally located base station, converting the received digital representation directly to a received analog representation;demodulating the received analog representation to recover the individual inbound telephone signals. 2. The method of claim 1, wherein: the step of sending the digital representation of the radio-frequency signal to the remote unit includes modulating it onto a transmit optical signal at a transmit wavelength on an optical fiber; andthe step of sending the received digital representation to the base station includes modulating it onto a receive optical signal on an optical fiber. 3. The method of claim 2, wherein the transmit and receive optical signals are sent on the same optical fiber, the transmit and receive wavelengths being different from each other. 4. The method of claim 1, wherein all the antenna units are located near the remote unit, and wherein the distance from the centrally located base station to the remote unit is greater than the distance from the remote unit to its antenna unit. 5. A method of sectorizing coverage over a cellular communications area divided into a plurality of microcells each covering a subarea of the communications area, and each divided into a plurality of sectors, the method comprising performing the following steps for each microcell: receiving a number of information-bearing telephone signals from a mobile telecommunications switching office at a common base station serving the microcells within the cellular communications area;generating from the information-bearing telephone signals one of a plurality of different channel sets of signals for each sector of that microcell at the base station;combining the plurality of different channel sets into a single analog signal in a predetermined radio-frequency band;converting the single analog signal directly to a single digital representation;sending the digital representation via a transmission means to a remote unit located in or near the subarea;at the remote unit, converting the digital representation directly to an analog representation of the radio-frequency signal for all channel sets within the same predetermined radio-frequency band; andsending the radio-frequency signal for each of the plurality of channel sets to a different one of a plurality of antenna units, each of the antenna units being positioned so as to cover a different angular sector of that microcell. 6. The method of claim 5, wherein the step of sending the radio-frequency signal for each of the channel sets includes: splitting the channel sets to form multiple parallel paths each carrying a signal representation for a different one of the channel sets; andfiltering each of the paths differently based upon the channel set carried on that path. 7. A method of sectorizing coverage over a cellular communications area divided into a plurality of microcells each covering a subarea of the communications area, each microcell being divided into a plurality of sectors, the method comprising: at a plurality of antenna units each covering a different sector of a microcell, receiving analog telephone signals within a predetermined radio-frequency band for a channel set assigned to that sector;sending all the analog telephone signals to a remote unit serving the sectors of the microcell, the remote unit being located in or near the subarea of the microcell;at the remote unit for the microcell, combining all the analog telephone signals from all sectors of the microcell into a single analog signal within the same radio-frequency band as the channel sets for the sectors of the microcell;converting the single combined analog signal directly as a whole to a received digital representation;sending the received digital representation via the transmission means to a common base station serving the microcells of the communications area;at the base station, converting the received digital representation to an inbound analog signal within the radio-frequency band;demodulating the inbound analog signal to recover a plurality of information-bearing signals representing received analog telephone signals; andsending the information-bearing signals to a mobile telecommunications switching office. 8. The method of claim 7, wherein the antenna unit for said each microcell includes one or more diversity antenna(s) covering one or more sector(s) of that microcell. 9. The method of claim 8, further comprising the steps of: at each diversity antenna, receiving analog diversity signal(s) within the radio-frequency band for the channel set of its sector;sending all diversity signals for said each microcell to the remote unit for said each microcell;at the remote unit for said each microcell, converting the diversity signals from all sectors in that microcell to a diversity digital representation within the radio-frequency band; andsending the diversity digital representation via the transmission means to the base station. 10. A method of transmitting an RF signal between an optical node and a head end, the method comprising: generating a digitized representation of the RF signal at the optical node, wherein the RF signal is a combined analog signal representing a plurality of transmissions for a set of channels; andtransmitting the digitized representation to the head end. 11. The method of claim 10, wherein generating a digitized representation of the RF signal comprises sampling the RF signal to produce a stream of digital samples. 12. The method of claim 10, wherein transmitting the digitized representation to the head end comprises transmitting the digitized representation over a path selected from the group consisting of a fiber optic cable and a coaxial cable. 13. The method of claim 11, wherein the path is a single fiber optic cable or a single coaxial cable. 14. The method of claim 11, wherein the fiber optic is part of a cable television system. 15. A method of transceiving RF signals between a head end and at least one optical node, the method comprising: generating a digitized representation of a first RF signal at the head end, wherein the first RF signal is a combined analog signal representing a plurality of transmissions for a set of channels;transmitting the digitized representation to the optical node;receiving a second RF signal at the at least one optical node;generating a digitized representation of the second RF signal at the optical node, wherein the second RF signal is a combined analog signal representing a plurality of transmissions for a set of channels; andtransmitting the digitized representation to the head end. 16. The method of claim 15, wherein the optical node is coupled to a cable television system. 17. The method of claim 15, wherein generating a digitized representation of the first and second RF signals comprises: sampling the RF signal to produce a stream of digital samples. 18. The method of claim 15, wherein transmitting the digitized representation of the first and second RF signals comprises transmitting the digitized representation over a path selected from the group consisting of a fiber optic cable and a coaxial cable. 19. The method of claim 18, wherein the path is a single fiber optic cable or a single coaxial cable. 20. A method of communicating an RF signal from an at least one optical node to a head end, the method comprising: receiving an RF signal at an at least one optical node;generating a digitized representation of the RF signal at the at least one optical node, wherein the RF signal is a combined analog signal representing a plurality of transmissions for a set of channels; andtransmitting the digitized representation to the head end. 21. The method of claim 20, wherein generating a digitized representation of the RF signal comprises sampling the RF signal to produce a stream of digital samples. 22. The method of claim 20, wherein transmitting the digitized representation to the head end comprises transmitting the digitized representation over a path selected from the group consisting of a fiber optic cable and a coaxial cable. 23. The method of claim 22, wherein the path is a single fiber optic cable or a single coaxial cable. 24. The method of claim 22, wherein the fiber optic is part of a cable television system. 25. A communications system for transmission of an RF signal from an optical node to a head end, comprising: an optical node coupled to a carrier medium, wherein the optical node digitizes a received RF signal and transmits the digitized RF signal on the carrier medium, where the RF signal is a combined analog signal representing a plurality of transmissions for a set of channels; anda head end coupled to the carrier medium. 26. The communications system of claim 25, wherein digitizing the RF signal comprises sampling the RF signal to produce a stream of digital samples. 27. The communications system of claim 25, wherein transmitting the digitized RF signal on the carrier medium comprises transmitting the digitized representation over a carrier medium selected from the group consisting of a fiber optic cable and a coaxial cable. 28. The communications system of claim 25, wherein the carrier medium is a single fiber optic cable or a single coaxial cable. 29. The communications system of claim 25, wherein the fiber optic is part of a cable television system. 30. A communications system for transceiving RF signals from an optical node to a head end, comprising: at least one optical node coupled to a carrier medium, wherein the at least one optical node digitizes an first RF signal and transmits the digitized first RF signal on the carrier medium, where the first RF signal is a combined analog signal representing a plurality of transmissions for a set of channels; anda head end coupled to the carrier medium, wherein the head end digitizes a second RF signal and transmits the digitized second RF signal on the carrier medium, where the second RF signal is a combined analog signal representing a plurality of transmissions for a set of channels. 31. The communications system of claim 30, wherein digitizing the first and second RF signals comprises sampling the RF signal to produce a stream of digital samples. 32. The communications system of claim 30, wherein transmitting the digitized first and second RF signals on the carrier medium comprises transmitting the digitized representation over a carrier medium selected from the group consisting of a fiber optic cable and a coaxial cable. 33. The communications system of claim 30, wherein the carrier medium is a single fiber optic cable or a single coaxial cable. 34. The communications system of claim 30, wherein the fiber optic is part of a cable television system. 35. A method of transmitting an RF signal between an optical node and a head end, the method comprising: generating a digitized representation of the RF signal at the optical node; andtransmitting the digitized representation to the head end. 36. The method of claim 35, wherein generating a digitized representation of the RF signal comprises sampling the RF signal to produce a stream of digital samples. 37. The method of claim 35, wherein transmitting the digitized representation to the head end comprises transmitting the digitized representation over a path selected from the group consisting of a fiber optic cable and a coaxial cable. 38. The method of claim 37, wherein the path is a single fiber optic cable or a single coaxial cable. 39. The method of claim 37, wherein the fiber optic is part of a cable television system. 40. A communications system for transmission of an RF signal from an optical node to a head end, comprising: an optical node coupled to a carrier medium, wherein the optical node digitizes a received RF signal and transmits the digitized RF signal on the carrier medium; anda head end coupled to the carrier medium. 41. The communications system of claim 40, wherein digitizing the RF signal comprises sampling the RF signal to produce a stream of digital samples. 42. The communications system of claim 40, wherein transmitting the digitized RF signal on the carrier medium comprises transmitting the digitized representation over a carrier medium selected from the group consisting of a fiber optic cable and a coaxial cable. 43. The communications system of claim 40, wherein the carrier medium is a single fiber optic cable or a single coaxial cable. 44. The communications system of claim 40, wherein the fiber optic is part of a cable television system. 45. A first unit for communicating with a remote unit over a communication medium, the first unit comprising: a framer that frames a digital representation of a base station signal from a base station in order to produce a framed signal, the base station signal comprising a single signal that includes a plurality of channels, the plurality of channels including information being transmitted to a plurality of remote wireless communication units;wherein the first unit transmits a transmission signal over the communication medium to the remote unit;wherein the transmission signal is derived from at least a portion of the framed signal; andwherein the remote unit is physically remote from the first unit. 46. The first unit of claim 45, wherein the base station signal is output from the base station. 47. The first unit of claim 45, wherein the digital representation of the base station signal is generated at the first unit. 48. The first unit of claim 45, wherein the base station is communicatively coupled to the first unit. 49. The first unit of claim 48, wherein the base station is directly connected to the first unit. 50. The first unit of claim 45, wherein the first unit comprises the base station. 51. The first unit of claim 45, wherein the plurality of channels comprises a plurality of carriers, wherein each of a plurality of baseband signals is modulated onto at least one of the plurality of carriers, wherein the plurality of baseband signals conveys the information. 52. The first unit of claim 51, wherein each of the plurality of carriers comprises at least one of a radio frequency carrier and an intermediate frequency carrier. 53. A first unit for communicating with a remote unit over a communication medium, the first unit comprising: a framer that, in order to produce a framed signal, frames a representation of a wireless signal, the wireless signal for wirelessly communicating with a plurality of remote wireless communication units, the wireless signal comprising a plurality of channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to the plurality of remote wireless communication units is modulated;wherein the first unit transmits a transmission signal over the communication medium to the remote unit;wherein the transmission signal is derived from at least a portion of the framed signal; andwherein the remote unit is physically remote from the first unit. 54. The first unit of claim 53, wherein the representation of the wireless signal comprises a digital representation of the wireless signal. 55. The first unit of claim 53, wherein the plurality of channels comprises a plurality of baseband signals that comprise the information, wherein each of the plurality of baseband signals is modulated onto at least one of the plurality of carriers. 56. The first unit of claim 53, wherein the framed signal comprises a plurality of frames, each frame comprising a digital sample of the plurality channels. 57. The first unit of claim 56, wherein each frame comprises at least one of control data and monitoring data. 58. The first unit of claim 56, wherein each frame comprises error detection and correction data. 59. The first unit of claim 56, wherein each frame comprises data associated with multiple services. 60. The first unit of claim 53, wherein the plurality of carriers comprises at least one of a plurality of radio frequency carriers and a plurality of intermediate frequency carriers. 61. The first unit of claim 53, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 62. The first unit of claim 53, wherein the first unit receives, from a base station in the form of an analog combined signal, the plurality of channels. 63. The first unit of claim 62, wherein the first unit is at the base station. 64. A remote unit for communicating with a first unit over a communication medium, the remote unit comprising: a demultiplexer to extract, from a framed signal derived from a transmission signal transmitted from the first unit to the remote unit via the communication medium, a digital representation of a plurality channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to a plurality of remote wireless communication units is modulated; anda converter to output a radio frequency signal from the digital representation for wireless radio frequency transmission to a plurality of wireless communication devices;wherein the remote unit is physically remote from the first unit. 65. The remote unit of claim 64, wherein the framed signal comprises a plurality of frames, each frame comprising a digital sample of the plurality of channels. 66. The remote unit of claim 65, wherein each frame comprises at least one of control data and monitoring data. 67. The remote unit of claim 65, wherein each frame comprises error detection and correction data. 68. The remote unit of claim 65, wherein each frame comprises data associated with multiple services. 69. The remote unit of claim 64, wherein the plurality of carriers comprises at least one of a plurality of radio frequency carriers and a plurality of intermediate frequency carriers. 70. A remote unit for communicating with a first unit over a communication medium, the remote unit comprising: a framer that frames a digital representation of a radio frequency signal from an antenna in order to produce a framed signal, the radio frequency signal comprising a plurality of radio frequency channels, the plurality of radio frequency channels including information being transmitted from a plurality of remote wireless communication units;wherein the remote unit transmits a transmission signal over the communication medium to the first unit;wherein the transmission signal is derived from at least a portion of the framed signal; andwherein the remote unit is physically remote from the first unit. 71. The remote unit of claim 70, wherein the framer frames a digital representation of a second analog radio frequency signal. 72. The remote unit of claim 71, wherein the second analog radio frequency signal is a diversity signal from a diversity antenna. 73. A first unit for communicating with a remote unit over a communication medium, the first unit comprising: a demultiplexer to extract, from a framed signal derived from a transmission signal transmitted from the remote unit to the first unit via the communication medium, a digital representation of a radio frequency signal from an antenna, the radio frequency signal comprising a plurality of radio frequency channels; anda converter to output a base station signal from the digital representation for communication to a base station unit, the base station signal comprising a representation of at least a subset of the plurality of radio frequency channels;wherein the remote unit is physically remote from the first unit. 74. The first unit of claim 73, wherein the first unit is located at the base station. 75. The first unit of claim 74, wherein base station is connected to the first unit. 76. A method of communicating from a first unit to a remote unit over a communication medium, the method comprising: producing a framed signal from a digital representation of a base station signal originating from a base station, the base station signal comprising a single signal that includes a plurality of channels, the plurality of channels including information being transmitted to a plurality of remote wireless communication units; andtransmitting a transmission signal from the host unit to the remote unit over the communication medium;wherein the transmission signal is derived from at least a portion of the framed signal; andwherein the remote unit is physically remote from the first unit. 77. The method of claim 76, wherein the base station signal is output from the base station. 78. The method of claim 76, further comprising generating the digital representation of the base station signal at the first unit. 79. The method of claim 76, wherein the base station is communicatively coupled to the first unit. 80. The method of claim 79, wherein the base station is directly connected to the first unit. 81. The method of claim 76, wherein the first unit comprises the base station. 82. The method of claim 76, wherein the plurality of channels comprises a plurality of carriers, wherein each of a plurality of baseband signals is modulated onto at least one of the plurality of carriers, wherein the plurality of baseband signals conveys the information. 83. The method of claim 82, wherein each of the plurality of carriers comprises at least one of a radio frequency carrier and an intermediate frequency carrier. 84. A method of communicating from a first unit to a remote unit over a communication medium, the method comprising: producing a framed signal from a representation of a wireless signal, the wireless signal for wirelessly communicating with a plurality of remote wireless communication units, the wireless signal comprising a plurality channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to the plurality of remote wireless communication units is modulated; andtransmitting a transmission signal from the host unit to the remote unit over the communication medium;wherein the transmission signal is derived from at least a portion of the framed signal; andwherein the remote unit is physically remote from the first unit. 85. The method of claim 84, wherein the representation of the wireless signal comprises a digital representation of the wireless signal. 86. The method of claim 84, wherein the plurality of channels comprises a plurality of baseband signals that comprise the information, wherein each of the plurality of baseband signals is modulated onto at least one of the plurality of carriers. 87. The method of claim 84, wherein the framed signal comprises a plurality of frames, each frame comprising a digital sample of the plurality channels. 88. The method of claim 87, wherein each frame comprises at least one of control data and monitoring data. 89. The method of claim 87, wherein each frame comprises error detection and correction data. 90. The method of claim 87, wherein each frame comprises data associated with multiple services. 91. The method of claim 84, wherein the plurality of carriers comprises at least one of a plurality of radio frequency carriers and a plurality of intermediate frequency carriers. 92. The method of claim 84, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 93. The method of claim 84, wherein the first unit receives, from a base station in the form of an analog combined signal, the plurality of channels. 94. The method of claim 93, wherein the first unit is at the base station. 95. A method of communicating from a first unit to a remote unit over a communication medium, the method comprising: receiving, at the remote unit from the communication medium, a transmission signal transmitted from the first unit;extracting, from a framed signal derived from the transmission signal, a digital representation of a plurality channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to a plurality of remote wireless communication units is modulated; andproducing a radio frequency signal from the digital representation for wireless radio frequency transmission to a plurality of wireless communication devices;wherein the remote unit is physically remote from the first unit. 96. The method of claim 95, wherein the framed signal comprises a plurality of frames, each frame comprising a digital sample of the plurality channels. 97. The method of claim 96, wherein each frame comprises at least one of control data and monitoring data. 98. The method of claim 96, wherein each frame comprises error detection and correction data. 99. The method of claim 96, wherein each frame comprises data associated with multiple services. 100. The method of claim 95, wherein the plurality of carriers comprises at least one of a plurality of radio frequency carriers and a plurality of intermediate frequency carriers. 101. A method of communicating from a remote unit to a first unit over a communication medium, the method comprising: producing a framed signal from a digital representation of a radio frequency signal from an antenna, the radio frequency signal comprising a plurality of radio frequency channels, the plurality of radio frequency channels including information being transmitted from a plurality of remote wireless communication units;transmitting a transmission signal from the remote unit to the first unit over the communication medium;wherein the transmission signal is derived from at least a portion of the framed signal; andwherein the remote unit is physically remote from the first unit. 102. The method of claim 101, wherein producing the framed signal further comprises producing the framed signal from the digital representation of the radio frequency signal from the antenna and a digital representation of a second radio frequency signal. 103. The method of claim 102, wherein the second radio frequency signal is a diversity signal from a diversity antenna. 104. A method of communicating from a remote unit to a first unit over a communication medium, the method comprising: receiving, at the first unit from the communication medium, a transmission signal transmitted from the remote unit;extracting, from a framed signal derived from the transmission signal, a digital representation of a radio frequency signal from an antenna, the radio frequency signal comprising a plurality of radio frequency channels; andproducing a base station signal from the digital representation for communication to a base station, the base station signal comprising a representation of at least a subset of the plurality of radio frequency channels;wherein the remote unit is physically remote from the first unit. 105. The method of claim 104, wherein the first unit is located at the base station. 106. The method of claim 105, wherein base station is connected to the first unit. 107. A first unit for communicating with a remote unit over a communication medium, the first unit comprising: a digital unit to output a digital representation of a base station signal from a base station, the base station signal comprising a single signal that includes a plurality of channels, the plurality of channels including information being transmitted to a plurality of remote wireless communication units;wherein the first unit transmits a transmission signal over the communication medium to the remote unit;wherein the transmission signal is derived from at least a portion of the digital representation; andwherein the remote unit is physically remote from the first unit. 108. The first unit of claim 107, wherein the digital unit comprises an analog to digital converter. 109. The first unit of claim 108, wherein the digital unit comprises a down converter that down converts the base station signal, wherein the analog to digital converter digitizes the down converted base station signal. 110. The first unit of claim 107, wherein the plurality of channels comprises at least one of a plurality of radio frequency channels and a plurality of intermediate frequency channels. 111. The first unit of claim 107, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 112. The first unit of claim 107, wherein the first unit receives, from a base station in the form of an analog combined signal, the base station signal. 113. The first unit of claim 112, wherein the first unit is at the base station. 114. A first unit for communicating with a remote unit over a communication medium, the first unit comprising: a digital unit to output a digital representation of a plurality channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to a plurality of remote wireless communication units is modulated;wherein the first unit transmits a transmission signal over the communication medium to the remote unit;wherein the transmission signal is derived from at least a portion of the digital representation; andwherein the remote unit is physically remote from the first unit. 115. The first unit of claim 114, wherein the digital unit comprises an analog to digital converter. 116. The first unit of claim 115, wherein the digital unit comprises a down converter that down converts a combined signal comprising the plurality of channels, wherein the analog to digital converter digitizes the down converted combined signal. 117. The first unit of claim 114, wherein the plurality of carriers comprises at least one of a plurality of radio frequency carriers and a plurality of intermediate frequency carriers. 118. The first unit of claim 114, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 119. The first unit of claim 114, wherein the first unit receives, from a base station in the form of an analog combined signal, the plurality of channels. 120. The first unit of claim 119, wherein the first unit is at the base station. 121. A first unit for communicating with a remote unit over a communication medium, the first unit comprising: an interface to receive, from the communication medium, a transmission signal transmitted from the remote unit, wherein the transmission signal comprises a digital representation of a radio frequency signal from at least one antenna communicatively coupled to the remote unit, the radio frequency signal comprising a plurality of radio frequency channels; anda digital unit to output a base station signal from the digital representation that is communicated to a base station, the base station signal comprising a representation of at least a subset of the plurality of radio frequency channels;wherein the remote unit is physically remote from the first unit. 122. The first unit of claim 121, wherein the digital unit comprises a digital to analog converter. 123. The first unit of claim 122, wherein the digital unit comprises an up converter that up converts an analog signal output by the digital to analog converter. 124. The first unit of claim 121, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 125. The first unit of claim 121, wherein the first unit is at the base station. 126. A remote unit for communicating with a first unit over a communication medium, the remote unit comprising: an interface to receive, from the communication medium, a transmission signal transmitted from the first unit, wherein the transmission signal comprises a digital representation of a plurality channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to a plurality of wireless communication units is modulated; anda digital unit to output a radio frequency signal from the digital representation for wireless radio frequency transmission to the plurality of wireless communication devices;wherein the remote unit is physically remote from the first unit. 127. The remote unit of claim 126, wherein the digital unit comprises a digital to analog converter. 128. The remote unit of claim 127, wherein the digital unit comprises an up converter that up converts an analog signal output by the digital to analog converter in order to output the radio frequency signal. 129. The remote unit of claim 126, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 130. The remote unit of claim 126, wherein the antenna is located at the remote unit. 131. A remote unit for communicating with a first unit over a communication medium, the remote unit comprising: a digital unit to output a digital representation of a radio frequency signal from an antenna, the radio frequency signal comprising a single signal that includes a plurality of radio frequency channels, the plurality of radio frequency channels including information being transmitted from a plurality of remote wireless communication units;wherein the remote unit transmits a transmission signal over the communication medium to the first unit;wherein the transmission signal is derived from at least a portion of the digital representation; andwherein the remote unit is physically remote from the first unit. 132. The remote unit of claim 131, wherein the digital unit comprises an analog to digital converter. 133. The remote unit of claim 132, wherein the digital unit comprises a down converter that down converts the radio frequency signal, wherein the analog to digital converter digitizes the down converted radio frequency signal. 134. The remote unit of claim 131, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 135. The remote unit of claim 131, wherein the antenna is located at the remote unit. 136. A method of communicating from a first unit to a remote unit over a communication medium, the method comprising: producing a digital representation of a base station signal originating from a base station, the base station signal comprising a single signal that includes a plurality of channels, the plurality of channels including information being transmitted to a plurality of remote wireless communication units;transmitting a transmission signal from the first unit to the remote unit over the communication medium;wherein the transmission signal is derived from at least a portion of the digital representation; andwherein the remote unit is physically remote from the first unit. 137. The method of claim 136, wherein producing the digital representation of the base station signal comprises down converting the base station signal. 138. The method of claim 136, wherein the plurality of channels comprises at least one of a plurality of radio frequency channels and a plurality of intermediate frequency channels. 139. The method of claim 136, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 140. The method of claim 136, further comprising receiving, from a base station in the form of an analog combined signal, the base station signal. 141. A method of communicating from a first unit to a remote unit over a communication medium, the method comprising: producing a digital representation of a plurality channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to a plurality of remote wireless communication units is modulated;transmitting a transmission signal from the first unit to the remote unit over the communication medium;wherein the transmission signal is derived from at least a portion of the digital representation; andwherein the remote unit is physically remote from the first unit. 142. The method of claim 141, wherein producing the digital representation of the plurality channels comprises down converting a combined signal comprising the plurality of channels. 143. The method of claim 141, wherein the plurality of carriers comprises at least one of a plurality of radio frequency carriers and a plurality of intermediate frequency carriers. 144. The method of claim 141, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 145. The method of claim 141, further comprising receiving, from a base station in the form of an analog combined signal, the plurality of channels. 146. A method of communicating from a remote unit to a first unit over a communication medium, the method comprising: receiving, at the first unit from the communication medium, a transmission signal transmitted from the remote unit, wherein the transmission signal comprises a digital representation of a radio frequency signal from at least one antenna communicatively coupled to the remote unit, the radio frequency signal comprising a plurality of radio frequency channels; andproducing a base station signal from the digital representation that is communicated to a base station, the base station signal comprising a representation of at least a subset of the plurality of radio frequency channels;wherein the remote unit is physically remote from the first unit. 147. The method of claim 146, wherein producing the base station signal from the digital representation comprises up converting an analog signal output by the digital to analog converter. 148. The method of claim 146, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 149. A method of communicating from a first unit to a remote unit over a communication medium, the method comprising: receiving, at the remote unit from the communication medium, a transmission signal transmitted from the first unit, wherein the transmission signal comprises a digital representation of a base station signal from a base station, the base station signal comprising a plurality of channels; andproducing a radio frequency signal from the digital representation for wireless radio frequency transmission to a plurality of wireless communication devices;wherein the remote unit is physically remote from the first unit. 150. The method of claim 149, wherein producing the radio frequency signal from the digital representation comprises up converting an analog signal output by the digital to analog converter in order to output the radio frequency signal. 151. The method of claim 149, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 152. The method of claim 149, wherein the antenna is located at the remote unit. 153. A method of communicating from a remote unit to a first unit over a communication medium, the method comprising: receiving a radio frequency signal from an antenna, the radio signal comprising a single signal that includes a plurality of radio frequency channels, the plurality of radio frequency channels including information being transmitted from a plurality of remote wireless communication units;producing a digital representation of the radio frequency signal;transmitting a transmission signal from the remote unit to the first unit over the communication medium;wherein the transmission signal is derived from at least a portion of the digital representation; andwherein the remote unit is physically remote from the first unit. 154. The method of claim 153, wherein producing the digital representation comprises down converting the radio frequency signal. 155. The method of claim 153, wherein the communication medium comprises an optical communication medium and the transmission signal comprises an optical transmission signal. 156. The method of claim 153, wherein the antenna is located at the remote unit. 157. A first unit for communicating with a remote unit over an optical communication medium, the first unit comprising: an interface to receive a plurality channels, the plurality of channels comprising a plurality of carriers on which information being transmitted to a plurality of wireless communication units is modulated; anda digitally modulated optical modulator to digitally modulate an optical signal with at least a portion of a digital representation of the plurality of channels in order to produce a modulated optical signal;wherein the remote unit is physically remote from the first unit. 158. A remote unit for communicating with a first unit over an optical communication medium, the first unit comprising: an interface to receive a radio frequency signal from an antenna, the radio frequency signal comprising a plurality of radio frequency channels, the plurality of radio frequency channels including information being transmitted from a plurality of wireless communication units; anda digitally modulated optical modulator to digitally modulate an optical signal with at least a portion of a digital representation of the radio frequency signal in order to produce a modulated optical signal;wherein the remote unit is physically remote from the first unit.
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