Downlink broadcasting by sequential transmissions from a communication station having an antenna array
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04M-001/00
H04B-007/00
H04B-001/00
출원번호
US-0689228
(2000-10-11)
등록번호
US-7299071
(2007-11-20)
발명자
/ 주소
Barratt,Craig H.
Parish,David M.
Uhlik,Christopher R.
Boyd,Stephen
Yun,Louis C.
Goldburg,Marc H.
출원인 / 주소
ArrayComm, LLC
대리인 / 주소
Blakely Sokoloff Taylor & Zafman LLP
인용정보
피인용 횟수 :
27인용 특허 :
151
초록▼
This invention relates to a method and apparatus for transmitting a downlink signal from a communication station to one or more subscriber units to achieve a desired radiation level over a desired sector (e.g., everywhere), the communication station including an array of antenna elements and one or
This invention relates to a method and apparatus for transmitting a downlink signal from a communication station to one or more subscriber units to achieve a desired radiation level over a desired sector (e.g., everywhere), the communication station including an array of antenna elements and one or more signal processors programmed (in the case of programmable signal processors) to weight the downlink signal according to one of a sequence of complex valued weight vectors. The method includes sequentially repeating transmitting the downlink signal, each repetition with a different weight vector from the sequence until all weight vectors in the sequence have been transmitted with. The sequence is designed for achieving the desired radiation level during at least one of the repetitions. In this way, every user in the desired region is transmitted to in the time period.
대표청구항▼
What is claimed is: 1. A method comprising: developing a plurality of signal processing procedures by selecting a weight vector from a sequence of different weight vectors, wherein elements of the weight vectors selectively modify one or more characteristics of transmission of a signal from each an
What is claimed is: 1. A method comprising: developing a plurality of signal processing procedures by selecting a weight vector from a sequence of different weight vectors, wherein elements of the weight vectors selectively modify one or more characteristics of transmission of a signal from each antenna of an antenna array, iteratively processing the signal through the plurality of signal processing procedures to generate a plurality of processed signals; and sequentially transmitting the plurality of processed signals through a coupled antenna array, generating a desired radiation level at a number of locations within a desired sector. 2. A method according to claim 1, wherein the signal is transmitted using a CDMA protocol. 3. A method according to claim 1, wherein the desirable radiation level is a non-null level. 4. A method according to claim 1, wherein the desired sector is comprised of a range of azimuths up to a complete range of azimuths of the antenna array. 5. A method according to claim 1, wherein the transmission characteristics include one or more of signal amplitude and/or phase. 6. A method according to claim 5, wherein the sequence of weight vectors share an amplitude value and have random phase values. 7. A method according to claim 5, wherein the sequence of weight vectors is comprised of weight vectors that are orthogonal. 8. A method according to claim 7, wherein the orthogonal weight vectors have elements with the same magnitude. 9. A method according to claim 7, wherein the orthogonal weight vectors are developed from one or more of rows or columns of a complex valued Walsh-Hadamard matrix, rows or columns of a real valued Hadamard matrix, and/or a sequence whose elements are basis vectors of a Fourier transform. 10. A method according to claim 1, wherein the sequence of weight vectors is comprised of weight vectors designed to provide a desirable radiation pattern within at least a sub-sector of the desired sector. 11. A method according to claim 10, wherein the desirable radiation pattern is a near omni-directional radiation pattern. 12. A method according to claim 10, wherein the desired sector is the whole range in azimuth. 13. A method according to claim 1, wherein the sequence of weight vectors includes weight vectors that are representative of weight vectors designed for transmission to known communication unit(s). 14. A method according to claim 13, wherein the weight vectors designed for transmission to known communication unit(s) are determined from spatial signature(s) associated with each of the communication unit(s). 15. A method according to claim 13 wherein the communication unit(s) is at least one of a subscriber unit and a base station. 16. A method according to claim 1, wherein the weight vectors are determined from weight vectors designed for transmission to known subscriber unit(s) using a vector quantization clustering process. 17. A method according to claim 16, the vector quantization clustering process comprising: assigning an initial set of weight vectors as a current set of representative weight vectors; combining each designed for subscriber unit weight vector with its nearest representative weight vector in the current set, according to some association criterion; determining an average measure of a distance between each representative weight vector in the current set and all weight vectors combined with that representative weight vector; replacing each representative weight vector in the current set with a core weight vector for all the weight vectors that have been combined with that representative weight vector; and iterative repeating the combining, determining and replacing steps until a magnitude of the difference between the average measure in a present iteration and the average distance in the previous iteration is less than a threshold. 18. A method according to claim 1, wherein the plurality of signal processing procedures is commensurate with the plurality of antennae within the antenna array used to sequentially transmit the plurality of processed signals. 19. A storage medium comprising content which, when executed by an accessing machine, implements a method according to claim 1. 20. A wireless communication system element comprising: a storage medium including content; and a processor element, coupled with the storage medium, to execute at least a subset of the content to implement a method according to claim 1. 21. A subscriber unit comprising: two or more antennas configured as an antenna array; and processing element(s), coupled with the antenna array, to select a weight vector from a sequence of different weight vectors to develop a plurality of signal processing procedures, wherein elements of the weight vectors selectively modify one or more characteristics of transmission of the signal from each antenna in the antenna array and to iteratively process a signal through the plurality of signal processing procedures to generate a plurality of processed signals which, when sequentially transmitted via the antenna array, generate a desired radiation level at a number of locations within a desired sector, wherein the desired sector is comprised of a range of azimuths up to a complete range of azimuths of the antenna array. 22. A subscriber unit according to claim 21, wherein the processing element(s) are comprised of one or more of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a field-programmable logic array (FPGA) and/or a microcontroller resident within the subscriber unit. 23. A subscriber unit according to claim 21, further comprising: a transceiver, coupled with the antenna array and the processor element(s), to sequentially transmit each of the generated plurality of processed signals to achieve the desired radiation level at a number of locations in the desired sector during at least one of said sequential transmissions, wherein sequential transmission of the generated plurality of processed signals comprises a broadcast transmission. 24. A subscriber unit according to claim 23, wherein the processor element(s) are integrated within the transceiver. 25. A subscriber unit according to claim 24, wherein the transceiver comprises at least one processor element for each antenna within the antenna array. 26. A subscriber unit according to claim 21, wherein the processor element(s) select a radiation level that is a non-null level. 27. A subscriber unit according to claim 21, wherein the transmission characteristics include one or more of a signal amplitude and/or phase. 28. A subscriber unit according to claim 21, wherein the sequence of weight vectors share an amplitude value and have random phase values. 29. A subscriber unit according to claim 21, wherein the sequence of weight vectors are comprised of weight vectors which are orthogonal to one another. 30. A subscriber unit according to claim 29, wherein the orthogonal weight vectors share a common magnitude. 31. A subscriber unit according to claim 29, wherein the processor element(s) develop the orthogonal weight vectors from one or more of rows or columns of a complex valued Walsh-Hadamard matrix, rows or columns of a real valued Hadamard matrix, and/or a sequence whose elements are basis vectors of a Fourier transform. 32. A subscriber unit according to claim 21, wherein the sequence of weight vectors is comprised of weight vectors designed to provide a desirable radiation pattern within at least a sub-sector of an overall desired sector. 33. A subscriber unit according to claim 32, wherein the processor element(s) develop the sequence of weight vectors designed to provide a desirable radiation pattern based, at least in part, on information associated with known communication station(s) in the desired sector. 34. A subscriber unit according to claim 33, wherein the processor elements develop the sequence of weight vectors from spatial signature(s) associated with the known communication station(s). 35. A subscriber unit according to claim 33, wherein the processor element(s) develop the sequence of weight vectors using a vector quantization clustering process. 36. A subscriber unit according to claim 29, wherein the processor element(s) develop a plurality of signal processing procedures commensurate with the plurality of antennae comprising the antenna array. 37. A subscriber unit according to claim 21 wherein the signal is transmitted using a CDMA protocol. 38. A communication station comprising: two or more antennas configured as an antenna array; and processing element(s), coupled with the antenna array, to select a weight vector from a sequence of different weight vectors to develop a plurality of processing procedures, wherein elements of the weight vectors selectively modify one or more characteristics of transmission of the signal from each antenna in the antenna array and to iteratively process a signal through the plurality of signal processing procedures to generate a plurality of processed signals which, when sequentially transmitted via the antenna array, generate a desired radiation level at a number of locations within a desired sector. 39. A communication station according to claim 38, wherein the processing element(s) are comprised of one or more of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a field-programmable logic array (FPGA) and/or a microcontroller resident within the communication station. 40. A communication station according to claim 38, further comprising: one or more transceivers, coupled with the antenna array and the processor element(s), to sequentially transmit each of the generated plurality of processed signals to achieve the desired radiation level at a number of locations in the desired sector during at least one of said sequential transmissions, wherein sequential transmission of the generated plurality of processed signals comprises a broadcast transmission. 41. A communication station according to claim 40, wherein the processor element(s) are integrated within one or more of the transceiver(s). 42. A communication station according to claim 40, wherein the transceiver comprises at least one processor element for each antenna within the antenna array. 43. A communication station according to claim 38, wherein the desired sector is comprised of a range of azimuths up to a complete range of azimuths of the antenna array. 44. A communication station according to claim 38, wherein the transmission characteristics include one or more of a signal amplitude and/or phase. 45. A communication station according to claim 38, wherein the sequence of weight vectors share an amplitude value and have random phase values. 46. A communication station according to claim 38, wherein the sequence of weight vectors are comprised of weight vectors which are orthogonal to one another. 47. A communication station according to claim 46, wherein the processor element(s) develop the orthogonal weight vectors from one or more of rows or columns of a complex valued Walsh-Hadamard matrix, rows or columns of a real valued Hadamard matrix, and/or a sequence whose elements are basis vectors of a Fourier transform. 48. A communication station according to claim 38, wherein the sequence of weight vectors is comprised of weight vectors designed to provide a desirable radiation pattern within at least a sub-sector of an overall desired sector. 49. A communication station according to claim 48, wherein the processor element(s) develop the sequence of weight vectors designed to provide a desirable radiation pattern based, at least in part, on information associated with known subscriber unit(s) in the desired sector. 50. A communication station according to claim 49, wherein the processor elements develop the sequence of weight vectors from spatial signature(s) associated with the known subscriber unit(s). 51. A communication station according to claim 49, wherein the processor element(s) develop the sequence of weight vectors using a vector quantization clustering process. 52. A communication station according to claim 51, wherein performing the vector quantization cluster process, the processor element(s): assign an initial set of weight vectors as a current set of representative weight vectors; combine each designed for subscriber unit weight vector with its nearest representative weight vector in the current set, according to some association criterion; determine an average measure of a distance between each representative weight vector in the current set and all weight vectors combined with that representative weight vector; replace each representative weight vector in the current set with a core weight vector for all the weight vectors that have been combined with that representative weight vector; and iteratively repeat the combining, determining and replacing elements until a magnitude of the difference between the average measure in a present iteration and the average distance in the previous iteration is less than a threshold. 53. A communication station according to claim 38, wherein the processor element(s) develop a plurality of signal processing procedures commensurate with the plurality of antennae comprising the antenna array. 54. A communication station according to claim 38 wherein the signal is transmitted using a CDMA protocol.
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Antonio Franklin P. (Del Mar CA) Gilhousen Klein S. (Bozeman MT) Wolf Jack K. (La Jolla CA) Zehavi Ephraim (San Diego CA), Adaptive sectorization in a spread spectrum communication system.
Searle Jeffrey G. (5 Langdon Lane Galmpton ; Brixham ; Devon TQ5 OPQ GBX) Dean Stuart J. (20 Southfield Road Paignton ; Devon TQ3 2SU GBX) Broome Keith R. (8 Seaton Close Babbacombe ; Torquay ; Devon, Base station antenna arrangement.
Searle Jeffrey G. (Galmpton GBX) Dean Stuart J. (Nepean CAX) Broome Keith R. (Babbacombe GBX) Chrystie Peter J. (Galmpton GBX) Cox Christopher R. (East Portlemouth GBX), Base station antenna arrangement.
Koohgoli Mahshad (Ottawa CAX) Cohn-Sfetcu Sorin (Ottawa CA CAX) Lockton John D. (Hillsborough CA), Call set-up and spectrum sharing in radio communication on systems with dynamic channel allocation.
Barnes Michael (Mendon NY) Hagstrom Kenneth L. (Fairport NY) Hayes David F. (Webster NY) Helm George (Fairport NY) Keane Anthony (Penfield NY) Pawlowski Roger (Rochester NY) Percival Christopher (Roc, Cellular mobile telephone system and method.
Duque-Anton Jesus M. (Nrnberg DEX) Kunz Dietmar W. (Nrnberg DEX) Rber Bernhard J. (Nrnberg DEX), Cellular radio system having channel evaluation and optimal channel selection via trial use of non-assigned channels.
D\Amico Thomas V. (Boca Raton FL) Johnson Brian (Plantation FL) Saltzberg Theodore (Chicago IL), Channel acquistion and handoff method and apparatus for a TDMA communication system.
Matsuoka Akihiko,JPX ; Orihashi Masayuki,JPX ; Takahashi Kenichi,JPX, Demodulator apparatus for digital radio communication receiver providing pseudo-coherent quadrature demodulation based o.
Johnson Russell K. (Half Moon Bay CA), Direct sequence spread spectrum receiver and antenna array for the simultaneous formation of a beam on a signal source a.
Huensch George D. (Aurora IL) Lien Robert L. (Batavia IL) Lind Jerol M. (Wheaton IL) MacDonald Verne H. (Elberon NJ), High density cellular mobile radio communications.
Shimizu Toshimitsu (Tokyo JPX) Sako Yasuhiko (Tokyo JPX), High throughput communication method and system for a digital mobile station when crossing a zone boundary during a sess.
Sawatari Takeo (Birmingham MI) Keating Patrick N. (Bloomfield MI) Steinberg Ronald F. (Livonia MI) Mueller Rolf K. (Stillwater MN), Low angle radar processing means.
Hyden Eoin ; Srivastava Mani Bhushan ; Trotter John Andrew ; Agrawal Prathima ; Krzyzanowski Paul, Medium access control and air interface subsystem for an indoor wireless ATM network.
Andersson Claes H. (EkerSEX) Almgren Knut M. (Sollentuna SEX) Wallstedt Kenneth Y. (Solna SEX) Fallgren Anna (Danderyd SEX) Eriksson Hakan (Danderyd SEX), Method and a device for the utilization of channels in a radio communications system.
Roy ; III Richard H. (Cupertino CA) Parish David M. (Amherst NY) Barratt Craig H. (Redwood City CA) Yang Chinping Q. (Palo Alto CA) Orchard John T. (Palo Alto CA), Method and apparatus for calibrating antenna arrays.
Barratt Craig H. ; Farzaneh Farhad ; Parish David M., Method and apparatus for decision directed demodulation using antenna arrays and spatial processing.
Moussa Joseph (Hilliard OH) Schleder William E. (Dublin OH) Thwaits Richard (Columbus OH), Method and apparatus for detecting and decoding transponder reply signals.
Meidan Reuven (Ramat Hasharon ILX), Method and apparatus for dynamic distribution of a communication channel load in a cellular radio communication system.
Buchenhorner Michael J. (Coral Gables FL) Ghomeshi Mohammad M. (Ft. Lauderdale FL) Shapiro Steven C. (Lake Worth FL), Method and apparatus for establishing a communication link.
Parish David M. ; Chiodini Alain M. ; Barratt Craig H. ; Karuppiah Kamaraj, Method and apparatus for estimating parameters of a communication system using antenna arrays and spatial processing.
D\Amico Thomas V. (Boca Raton FL) Dorenbosch Jheroen (Waxahachie TX), Method and apparatus for implementing a received signal quality measurement in a radio communication system.
Gardner William A. (Yountville CA) Schell Stephan V. (Davis CA), Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering.
Forssen Ulf (Saltsjo-Boo SEX) Gudmundson Bjorn (Sollentuna SEX), Method and apparatus for transmitting and receiving signals using two classes of channels.
Chevalier Pascal,FRX ; Pipon Francois,FRX, Method and device enabling a modem to be synchronized with an RF digital data transmitter in the presence of jammers.
Harrison Robert Mark, Method and system for transmitting and demodulating a communications signal using an adaptive antenna array in a wireless communication system.
Roy ; III Richard H. (Cupertino CA) Paulraj Arogyaswami J. (Stanford CA) Kailath Thomas (Stanford CA), Method for estimating signal source locations and signal parameters using an array of signal sensor pairs.
Alamouti Siavash ; Casas Eduardo F.,CAX ; Hirano Michael ; Hoole Elliott ; Jesse Mary ; Michelson David G.,CAX ; Poon Patrick ; Veintimilla Gregory J. ; Zhang Hongliang, Method for frequency division duplex communications.
Mourot Christophe (Asnieres FRX) Kumar Vinod (Paris FRX) Wautier Armelle (Gif sur Yvette FRX) Dany Jean-Claude (Gif sur Yvette FRX), Method of equalizing a receive data block in a time-division multiple access communication system and receiver utilizing.
Pierre Roux FR; Christophe Cordier FR; Alejandro De Hoz Garcia-Bellido FR, Method to modify a current transmitted power distribution in case of macro-diversity and corresponding mobile station.
Roy ; III Richard H. (Cupertino CA) Paulraj Arogyaswami J. (Bangalore CA INX) Kailath Thomas (Stanford CA), Methods and arrangements for signal reception and parameter estimation.
Nakazawa Isao (Kawasaki JPX) Morita Osamu (Kawasaki JPX), Mobile communication system having pagers for providing two-way data communication between a base station and mobile sta.
Wey Chia-Sam (Reno NV) Stronks John M. (Reno NV) Lilieholm Erik W. (Reno NV), Multichannel transmitter combiners employing cavities having low output impedance.
Sasser Thurman (1826 Sarazen Dr. Orlando FL 32808) Martin Roger L. (P.O. Box 5591 Deltona FL 32728), Object orienting systems and systems and processes relating thereto.
Wachs Marvin R. (Calabasas CA) Berman Arnold L. (Los Angeles CA) Thompson James D. (Manhattan Beach CA), Phased array antenna management system and calibration method.
Geyh Edward ; Sikina Thomas Y. ; Adhami Tariq R. ; Schuss Jack J., Phased array radio frequency (RF) built-in-test equipment (BITE) apparatus and method of operation therefor.
Pentikainen Heimo,FIX ; Sarpola Jussi,FIX ; Suhonen Aki,FIX ; Vimpari Markku,FIX, Procedure and system for ensuring emergency communication in a wireless local loop environment.
Kuo Yao Hsien ; Kennedy John Francis ; Cvetkovic Milan,GBX ; Nicholas Christopher Stanley,GBX, Proportional diversity radio receiver system with dynamic noise-controlled antenna phasers.
Siira Anne-Marie (Oulu FIX) Sarkk Veli-Matti (Oulunsalo FIX) Huovinen Timo (Oulu FIX), Radio test loop having common combiner cable connecting transmitters, spaced at nl
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Dent Paul W. (Stehag SEX), Random access in mobile radio telephone systems.
Gardner William A. (Yountville CA) Schell Stephan V. (Livermore CA) Agee Brian G. (San Jose CA), Self-coherence restoring signal extraction and estimation of signal direction of arrival.
Kay Stanley (Rockville MD) Kim Youngky (N. Potomac MD) King Lou (Mt. Airy MD) Mehta Ashok D. (Gaithersburg MD) Barnett Charles (Sterling VA), Sequential power estimation for cellular system handoff.
Mallavarpu Raghuveer (Acton MA) MacMaster George H. (Lexington MA) Puri M. Paul (Acton MA), Spatial field power combiner having offset coaxial to planar transmission line transitions.
Barratt Craig H. (Redwood City CA) Parish David M. (Amherst NY) Roy ; III Richard H. (Mountain View CA), Spectrally efficient high capacity wireless communication systems.
Ottersten Bjorn E.,SEX ; Barratt Craig H. ; Parish David M. ; Roy ; III Richard H., Spectrally efficient high capacity wireless communication systems with spatio-temporal processing.
Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Viterbi Andrew J. (La Jol, System and method for generating signal waveforms in a CDMA cellular telephone system.
Joseph Robin S. (Ste. Anne de Bellevue CAX) Houde Michael (St. Laurent CAX), System and method for providing priority access and channel assignment in a cellular telecommunication system.
Schloemer Jerry R. (Edwards Subdivision ; P.O. Box 307 Round Lake IL 60073), System for and method of assigning frequencies in a communications system with no central control of frequency allocatio.
Brandao Ruy L. (Ft. Lauderdale FL) Kyriakos Constantinos S. (Boca Raton FL) Spires Randall C. (Ft. Lauderdale FL) Jugs Andrejs (Boca Raton FL), TCAS bearing estimation receiver using a 4 element antenna.
Lopez Alfred R. (Commack NY) Papson John C. (Melville NY) Rosenblum Leonard J. (East Meadow NY), Validation of subscriber signals in a cellular radio network.
Agee, Brian G.; Bromberg, Matthew C., Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks.
Agee, Brian G; Bromberg, Matthew C., Method and system for robust, secure, and high-efficiency voice and packet transmission over ad-hoc, mesh, and MIMO communication networks.
Lee, Woo Yong; Kwon, Hyoung Jin; Kim, Kyeongpyo; Kim, Jin Kyeong; Kim, Yong Sun; Lee, Jae Sup; Ko, Young-chai, Multi-antenna communication method and system thereof.
Khan, Farooq; Daniels, Robert Clark; Muhammad, Khurram; Pisek, Eran; Haddad, Khalil; Gilliland, Paul, Wireless system using different bands in the transmit and receive direction and applying frequency shifts for bandwidth expansion.
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