A distributed antenna system includes a multiple-input and multiple-output (MIMO) base station configured to output at least a first signal and a second signal. At least one master unit communicates with the MIMO base station. At least one remote unit communicates with the master unit. At least one
A distributed antenna system includes a multiple-input and multiple-output (MIMO) base station configured to output at least a first signal and a second signal. At least one master unit communicates with the MIMO base station. At least one remote unit communicates with the master unit. At least one antenna is coupled with the remote unit for receiving signals from the remote unit. A coupler element is configured for introducing a phase shift in a portion of at least the first MIMO signal and for combining the phase shifted first MIMO signal portion with a portion of the second MIMO signal and presenting the combined first and second MIMO signal portions at an output port of the coupler element. An antenna is configured for receiving the combined MIMO signal portions for transmission.
대표청구항▼
1. A distributed antenna system comprising: at least one master unit within the distributed antenna system;a plurality of remote units within the distributed antenna system, the plurality of remote units distributed to provide coverage within a service area, each of the plurality of remote units rem
1. A distributed antenna system comprising: at least one master unit within the distributed antenna system;a plurality of remote units within the distributed antenna system, the plurality of remote units distributed to provide coverage within a service area, each of the plurality of remote units remotely located from each other and the at least one master unit, the plurality of remote units coupled with the at least one master unit;at least one antenna coupled with each of the remote units;a coupler element coupled to receive a plurality of multiple-input and multiple-output (MIMO) signals, including at least first and second MIMO signals of the plurality of MIMO signals, the coupler element configured for introducing a phase shift in a portion of at least the first MIMO signal and for combining the phase shifted first MIMO signal portion with a portion of the second MIMO signal and presenting the combined first and second MIMO signal portions at a first output port of the coupler element;at least one antenna coupled for receiving the combined first and second MIMO signal portions of the first output port for transmission. 2. The distributed antenna system of claim 1, wherein the coupler element is configured for introducing a phase shift in a portion of at least the second MIMO signal and for combining the phase shifted second MIMO signal portion with a portion of the first MIMO signal and presenting those combined first and second MIMO signal portions at a second output port of the coupler element, at least one antenna being coupled for receiving the combined first and second signal portions of the second output port for transmission. 3. The distributed antenna system of claim 1, wherein the coupler element first output port is coupled with the at least one master unit for presenting the combined first and second MIMO signal portions to the master unit for distribution to the at least one antenna. 4. The distributed antenna system of claim 3, wherein the at least one master unit is a MIMO master unit. 5. The distributed antenna system of claim 3, wherein the at least one master unit is a single-input and single-output (SISO) master unit. 6. The distributed antenna system of claim 2, wherein the coupler element first and second output ports are coupled with the at least one master unit for presenting the combined first and second MIMO signal portions of the first and second output ports to the master unit for distribution to antennas for transmission. 7. The distributed antenna system of claim 6, wherein the at least one master unit is a MIMO master unit. 8. The distributed antenna system of claim 2, wherein signals of the first output port are coupled with a master unit and the signals of the second output port are coupled with a master unit, the master units coupled with a plurality of single-input and single-output (SISO) remote units and configured for directing the combined MIMO signal portions of the first output port to at least one SISO remote unit and for directing the combined first and second MIMO signal portions of the second output port to another SISO remote unit. 9. The distributed antenna system of claim 7, wherein the MIMO master unit is coupled with a plurality of MIMO remote units each coupled with a plurality of antennas, the MIMO master unit configured for directing the combined first and second MIMO signal portions of both the first and second output ports to a MIMO remote unit, the MIMO remote unit directing the combined first and second MIMO signal portions of the first output port to one antenna and the combined first and second MIMO signal portions of the second port to another antenna. 10. The distributed antenna system of claim 1, wherein the master unit is configured for coupling with a source of MIMO signals and for directing the MIMO signals to the remote units and antennas, the coupler element being coupled between the remote unit and a respective antenna for presenting the combined first and second MIMO signal portions from the first outlet port to the antenna. 11. The distributed antenna system of claim 2, wherein at least one of the plurality of remote units is a MIMO remote unit with a plurality of antennas, the master unit configured for coupling with a source of MIMO signals for directing MIMO signals to the MIMO remote unit and antennas, the coupler element being coupled between the MIMO remote unit and respective antennas and presenting the combined first and second MIMO signal portions from the first outlet port to one antenna and presenting the combined first and second MIMO signal portions from the second outlet port to another antenna. 12. The distributed antenna system of claim 1, wherein the remote unit is coupled with the master unit over at least one of an optical link or and RF link. 13. The distributed antenna system of claim 1, wherein the coupler element is a 90° 3 dB hybrid coupler. 14. The distributed antenna system of claim 1, wherein the coupler element introduces an orthogonal phase shift to a portion of the MIMO signal. 15. A distributed antenna system comprising: at least one master unit within the distributed antenna system;a plurality of remote units within the distributed antenna system, the plurality of remote units distributed to provide coverage within a service area, each of the plurality of remote units remotely located from each other and the at least one master unit, the plurality of remote units coupled with the at least one master unit;at least one antenna coupled with each of the remote units for transmission of signals from the remote unit;a coupler element operatively coupled with the master unit and configured to receive, from a signal source, a plurality of multiple-input and multiple-output (MIMO) signals including at least first and second MIMO signals of the plurality of MIMO signals MIMO signals, the coupler element configured for introducing a phase shift in a portion of at least the first MIMO signal and for combining the phase shifted first MIMO signal portion with a portion of the second MIMO signal and presenting the combined first and second MIMO signal portions at a first output port of the coupler element;the master unit configured for receiving the combined first and second MIMO signal portions from the first output port;the remote units receiving the combined MIMO signal portions of the first output port from the master unit for transmission. 16. The distributed antenna system of claim 15, wherein the coupler element is configured for introducing a phase shift in a portion of at least the second MIMO signal and for combining the phase shifted second MIMO signal portion with a portion of the first MIMO signal and presenting those combined first and second MIMO signal portions at a second output port of the coupler element, the master unit configured for receiving the combined first and second MIMO signal portions from both the first and second output ports, the remote units and respective antennas receiving the combined first and second MIMO signal portions of the first and second output ports from the master unit for transmission. 17. The distributed antenna system of 15, wherein the remote units are SISO remote units, some of the SISO remote units receiving the combined MIMO signal portions of the first output port. 18. The distributed antenna system of 16 wherein the remote units are MIMO remote units, the MIMO remote units receiving the combined MIMO signal portions of both the first output port and the second output port. 19. A distributed antenna system comprising: at least one master unit within the distributed antenna system, the at least one master unit coupled to receive a plurality of multiple-input and multiple-output (MIMO) signals including at least first and second MIMO signals of the plurality of MIMO signals;a plurality of MIMO remote units within the distributed antenna system, the plurality of MIMO remote units distributed to provide coverage within a service area, each of the plurality of MIMO remote units remotely located from each other and the at least one master unit, the plurality of MIMO remote units coupled with the at least one master unit for receiving the MIMO signals;a plurality of antennas coupled with each of the MIMO remote units;a coupler element operatively coupled between a MIMO remote unit and respective antennas, the coupler element configured for introducing a phase shift in a portion of at least the first MIMO signal and for combining the phase shifted first MIMO signal portion with a portion of the second MIMO signal and presenting the combined first and second MIMO signal portions at a first output port of the coupler element, and configured for introducing a phase shift in a portion of at least the second MIMO signal and for combining the phase shifted second MIMO signal portion with a portion of the first MIMO signal and presenting those combined first and second MIMO signal portions at a second output port of the coupler element;the MIMO remote units receiving the combined first and second MIMO signal portions of the first and second output port from the master unit for transmission. 20. The distributed antenna system of 1, wherein the plurality of remote units are coupled with the at least one master unit via optical fibers. 21. The distributed antenna system of 15, wherein the plurality of remote units are coupled with the at least one master unit via optical fibers. 22. The distributed antenna system of 19, wherein the plurality of MIMO remote units are remotely located from the at least one master unit via optical fibers.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (198)
Schwartz, Adam L., Adaptive capacity management in a centralized basestation architecture.
Yu, Tak-Ki; Kim, Yung-Soo; Cho, Myeon-Kyun; Yun, Jae-Yeun; Lee, Yong-Hoon; Joung, Jin-Gon; Shin, Won-Yong, Apparatus and method for canceling interference in wireless communication system.
Elliot, Robert Douglas; Zimmerman, Martin L.; Linehan, Kevin Eldon; Graham, Peter Bruce; Mailandt, Peter; Meyer, Louis John; Sorells, Philip; Gray, Andrew Thomas; Yang, Ching Shun, Cellular antenna and systems and methods therefor.
Dorren Bradley John,CAX ; Shaw Dwayne Erik,CAX ; Youn Tai Won, Cellular communication system having device coupling distribution of antennas to plurality of transceivers.
Russell David S. (Minneapolis MN) Fischer Larry G. (Waseca MN) Wala Philip M. (Waseca MN), Cellular communications system with centralized base stations and distributed antenna units.
Russell David S. (Minneapolis MN) Fischer Larry G. (Waseca MN) Wala Philip M. (Waseca MN) Ratliff Charles R. (Crystal Lake IL) Brennan Jeffrey (Waseca MN), Cellular communications system with centralized base stations and distributed antenna units.
Sadri, Ali S.; Maltsev, Alexander; Maslennikov, Roman; Khoryaev, Alexey; Sergeyev, Vadim, Communication within a wireless network using multiple frequency bands.
Gabriel, Roland; Seeor, Alexander; Fritze, Stefan; Güllner, Martin, Device for receiving and transmitting mobile telephony signals with multiple transmit-receive branches.
Lehman Harvey R. (Batavia IL) Lidinsky William P. (Naperville IL) Mussman Harry E. (Glen Ellyn IL) Spicer David A. (Batavia IL) Vlack David (St. Charles IL), Digital communication network architecture for providing universal information services.
Larsson, Peter; Baldemair, Robert; Frenger, Pål; Johansson, Niklas, Enhancing outage capacity based on adaptive mode switching between on-frequency and frequency translation.
Harold A. Roberts ; David S. Russell ; Calvin G. Nelson ; Jeffrey Brede ; Joseph F. Chiappetta ; Niranjan R. Samant, Hybrid fiber/coax video and telephony communication.
Thelen, Dean Michael; George, Jacob; Zenteno, Luis Alberto; Sauer, Michael; Easton, Martyn N., Hybrid wireless/wired RoF transponder and hybrid RoF communication system using same.
Thomas, Timothy A.; Baum, Kevin L.; Vook, Frederick W.; Zhuang, Xiangyang, Method and apparatus for MIMO transmission optimized for successive cancellation receivers.
Luz, Yehuda Y.; Chen, Jiangnan Jason, Method and apparatus for antenna selection and power control in a multiple input multiple output wireless communication system.
Chen Tao ; Tiedemann ; Jr. Edward G., Method and apparatus for transmitting and receiving data multiplexed onto multiple code channels, frequencies and base stations.
Carlach, Jean-Claude; El Arab, Ali; Helard, Maryline, Method and device for transmission and reception in a multi-input and multi-output channel distributing a code word between several mapping matrices, and corresponding computer program.
Kavadias, Spyridon C.; Vavelidis, Konstantinos D.; Haralabidis, Nikolaos C., Method and system for filter calibration using fractional-N frequency synthesized signals.
Saban, Ofer; Shapira, Isaac; Hazani, Ami; Atias, Nissim; Ben Shlomo, Dror, Method and system for integrating an RF module into a digital network access point.
Saban, Ofer; Shapira, Isaac; Harel, Dror; Berlin, Igor, Method and system for real time control of an active antenna over a distributed antenna system.
Saban, Ofer; Shapira, Isaac; Harel, Dror; Berlin, Igor, Method and system for real time control of an active antenna over a distributed antenna system.
Hunziker, Christoph, Method and system for subterranean wireless data transmission between at least one mobile station and a fixed network by means of a radio network.
Kleider, John Eric; Baxley, Robert John, Methods and apparatus for wirelessly communicating signals that include embedded synchronization/pilot sequences.
Nissani (Nissensohn),Daniel Nathan, Multi input multi output wireless communication method and apparatus providing extended range and extended rate across imperfectly estimated channels.
Lee, Heung No; Jang, Hwan Chol, Orthotope sphere decoding method and apparatus for signal reconstruction in the multi-input multi-output antenna system.
George, Jacob; Sauer, Michael, Radio-over-fiber (RoF) optical fiber cable system with transponder diversity and RoF wireless picocellular system using same.
Berlin, Igor; Cune, William P.; Greene, Jason E.; Sauer, Michael; Schmidt, Gerald B., Sectorization in distributed antenna systems, and related components and methods.
Hui, Dennis; Balachandran, Kumar; Cheng, Jung-Fu; Guey, Jiann-Ching, Spatially randomized pilot symbol transmission methods, systems and devices for multiple input/multiple output (MIMO) wireless communications.
Leuck Wayne A. ; Gilbert Charles G. ; Lerman Ruvin I., System and method for single to two-band personal communication service base station conversion.
Ganesan, Rajesh; Das, Tapas K.; Ramachandran, Kandethody M., System for multiresolution analysis assisted reinforcement learning approach to run-by-run control.
Schmid, Peter; Braz, Oliver; Gunzer, Peter; Schmalisch, Mathias; Stefanik, Joerg, TDD repeater for a wireless network and method for operating said repeater.
Chockalingam, Ananthanarayanan; Rajan, Balaji Sundar; Nagaraja, Srinidhi; Mohammed, Saif Khan, Techniques for decoding transmitted signals using reactive taboo searches (RTS).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.