Signaling method in an OFDM multiple access system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04J-011/00
H04B-007/216
출원번호
US-0429896
(2009-04-24)
등록번호
US-8098568
(2012-01-17)
발명자
/ 주소
Laroia, Rajiv
Li, Junyi
Uppala, Sathyadev Venkata
출원인 / 주소
QUALCOMM Incorporated
대리인 / 주소
Vu, Kenneth
인용정보
피인용 횟수 :
66인용 특허 :
308
초록▼
A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A p
A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.
대표청구항▼
1. An apparatus for generating a vector of digital signal samples (S) for transmission in a wireless communication system, the apparatus comprising: a discrete Fourier transform (DFT) circuit that receives a discrete signal of complex data symbols (C), and calculates frequency responses (A1, . . . A
1. An apparatus for generating a vector of digital signal samples (S) for transmission in a wireless communication system, the apparatus comprising: a discrete Fourier transform (DFT) circuit that receives a discrete signal of complex data symbols (C), and calculates frequency responses (A1, . . . AM) corresponding to tones (f(1), . . . f(M)), through an M-point DFT, and outputs a vector [A1, . . . AM] of length M;a circuit that expands the vector [A1, . . . AM] to a new vector of length N that comprises a first set of tones and a second set of tones, the first set of tones corresponding to tones other than tones allocated to a transmitter and the second set of tones being contiguous;an inverse discrete Fourier transform (IDFT) circuit that performs an N-point inverse discrete Fourier transform operation on the new vector after expansion to obtain the vector of digital signal samples (S) by inserting zero value symbols corresponding to tones not allocated to the transmitter;a pre-pend circuit configured to pre-pend a cyclic prefix to the vector of digital signal samples (S); anda transmitter circuit configured to generate a signal representing the pre-pended vector of digital signal samples for transmission. 2. The apparatus of claim 1, wherein the second set of tones comprises allocated tones available for transmission. 3. The apparatus of claim 1, wherein the vector of length N is larger than the vector of length M. 4. The apparatus of claim 1, wherein the second set of tones comprises equally spaced tones. 5. The apparatus of claim 2, wherein the vector of length N is larger than the vector of length M. 6. The apparatus of claim 2, wherein the second set of tones comprises equally spaced tones. 7. The apparatus of claim 5, wherein the second set of tones comprises equally spaced tones. 8. An apparatus for generating a vector of digital signal samples (S) for transmission in a wireless communication system, the apparatus comprising: means for receiving a discrete signal of complex data symbols (C), and calculates frequency responses (A1, . . . AM) corresponding to tones (f(1), . . . f(M)), through an M-point DFT, and outputs a vector [A1, . . . AM] of length M;means for expanding the vector [A1, . . . AM] to a new vector of length N that comprises a first set of tones and a second set of tones, the first set of tones corresponding to tones other than tones allocated to a transmitter and the second set of tones being contiguous;means for performing an N-point inverse discrete Fourier transform operation on the new vector after expansion to obtain the vector of digital signal samples (S) by inserting zero symbols corresponding to tones not allocated to the transmitter;means for pre-pending a cyclic prefix to the vector of digital signal samples (S); andmeans for generating a signal representing the pre-pended vector of digital signal samples for transmission. 9. The apparatus of claim 8, wherein the second set of tones comprises allocated tones available for transmission. 10. The apparatus of claim 8, wherein the vector of length N is larger than the vector of length M. 11. The apparatus of claim 8, wherein the second set of tones comprises equally spaced tones. 12. The apparatus of claim 9, wherein the vector of length N is larger than the vector of length M. 13. The apparatus of claim 9, wherein the second set of tones comprises equally spaced tones. 14. The apparatus of claim 12, wherein the second set of tones comprises equally spaced tones.
Larsson Per .ANG.ke,SEX ; Frodigh Carl Magnus,SEX ; Almgren Knut Magnus,SEX, Adaptive channel allocation method and apparatus for multi-slot, multi-carrier communication system.
Sindhu Pradeep S. ; Frailong Jean-Marc ; Curry Donald J. ; Nafarieh Asghar ; Kletter Doron, Adaptive quantization compatible with the JPEG baseline sequential mode.
Haustein,Thomas; Jorswieck,Eduard; Jungnickel,Volker; Krueger,Udo; Pohl,Volker; Helmolt,Clemens v.; Wunder,Gerhard, Adaptive signal processing method in a MIMO-system.
Lamart Michel A. ; Dammermann Arnold B. ; Knoblock Glenn A. ; Grooters Robert S. ; DeKraker Larry ; Hasbany John Hanna J., Adjustable armrest for chairs.
Derryberry,R. Thomas; Rong,Zhigang; Luukkanen,Petteri, Apparatus and associated method, by which to facilitate scheduling of data communications in a radio communications system.
Cho,Sung Hyun; Yun,Sang Boh; Park,Won Hyoung; Han,Young Nam; Kim,Hoon; Koo,Ja Yong, Apparatus and method for allocating subchannels adaptively according to frequency reuse rates in an orthogonal frequency division multiple access system.
Marchok Daniel J. ; Melsa Peter J. W. ; Younce Richard C., Apparatus and method for bandwidth management in a multi-point OFDM/DMT digital communications system.
Bae,Sang Min; Cho,Young Kwon; Choi,Ho Kyu; Kim,Youn Sun; Heo,Jin Woo; Hwang,Jong Yoon; Lee,Hyun Woo; Kim,Sung Jin; Yi,Chu Hyon; Ku,Sun Gi; Kwon,Hwan Joon; Lee,Ju Ho, Apparatus and method for determining a data rate of packet data in a mobile communication system.
Benveniste Mathilde (South Orange NJ) Greenberg Albert G. (Millburn NJ) Hwang Frank K. (Warren NJ) Lubachevsky Boris D. (Bridgewater NJ) Wright Paul E. (Basking Ridge NJ), Apparatus and method for dynamic resource allocation in wireless communication networks utilizing ordered borrowing.
Kim, Sung Jin; Lee, Hyeon Woo; Park, Sang Hwan; Lee, Ju Ho, Apparatus and method for transmitting data using transmit antenna diversity in a packet service communication system.
Cho,Jae Hee; Huh,Hoon; Yoon,Soon Young; Suh,Chang Ho; Lee,Hyeon Woo; Park,Dong Seek, Apparatus and method for transmitting/receiving a pilot signal for distinguishing a base station in a communication system using an OFDM scheme.
Yano, Masashi; Matsui, Susumu; Yamamoto, Yoshinobu, Base station for multi-carrier TDMA mobile communication system and method for assigning communication channels.
Laroia, Rajiv; Li, Junyi; Rangan, Sundeep; Viswanath, Pramod, Base station identification in orthogonal frequency division multiplexing based spread spectrum multiple access systems.
Vijayan, Rajiv; Odenwalder, Joseph P.; Wolf, Jack K.; Lee, Chong U.; Zehavi, Ephraim, Bit interleaving for orthogonal frequency division multiplexing in the transmission of digital signals.
Dominique,Francis; Kong,Hongwel; Nabhane,Walld E., Channel quality predictor and method of estimating a channel condition in a wireless communications network.
Dogan Mithat Can ; Stearns Stephen Deane, Communication apparatus for transmitting and receiving signals over a fiber-optic waveguide using different frequency bands of light.
Sakoda, Kazuyuki; Suzuki, Mitsuhiro; Yamaura, Tomoya, Communication method and transmitter with transmission symbols arranged at intervals on a frequency axis.
Kim,Sung Jin; Moon,Yong Suk, Device and method for transmitting and receiving data by a transmit diversity scheme using multiple antennas in a mobile communication system.
Andersson Hkan C. (Ekero SEX) Diachina John W. (Garner NC) Persson Bengt (Djursholm SEX) Raith Alex K. (Durham NC) Sammarco Anthony J. (Garner NC) Sawyer Francois (St-Hubert CAX), Digital control channels having logical channels for multiple access radiocommunication.
Lundby Stein A. ; Razoumov Leonid, Forward link power control of multiple data streams transmitted to a mobile station using a common power control channel.
Periyalwar, Shalini S.; Tong, Wen; Strawczynski, Leo L., Frame structures supporting voice or streaming communications with high speed data communications in wireless access networks.
Love,Robert T.; Ghosh,Amativa; Kuchibhotla,Ravi; Stewart,Kenneth A.; Whinnett,Nicholas W., HARQ ACK/NAK coding for a communication device during soft handoff.
Haustein,Thomas; Jorswieck,Eduard; Jungnickel,Volker; von Helmolt,Clemens, MIMO signal processing method involving a rank-adaptive matching of the transmission rate.
Padovani,Roberto; Bender,Paul E.; Black,Peter J.; Grob,Matthew S.; Hinderling,Jurg K.; Sindhushayana,Nagabhushana T.; Wheatley, III,Charles E., Method and apparatus for burst pilot for a time division multiplex system.
Lee Chong U. ; Moallemi Kamran ; Warren Robert L., Method and apparatus for embedding auxiliary data in a primary data signal using frequency and time domain processing.
Mark Wallace ; Jay R. Walton ; Ahmad Jalali, Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system.
Gilhousen Klein S. (Bozeman MT) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (Boulder CO), Method and apparatus for performing handoff between sectors of a common base station.
Walton, Jay R.; Wallace, Mark; Ketchum, John W.; Howard, Steven J., Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information.
Wallace, Mark S.; Tiedemann, Jr., Edward G.; Wheatley, III, Charles E.; Walton, J. Rod; Howard, Steven J., Method and apparatus for providing wireless communication system synchronization.
Rotstein, Ron; Luz, Yuda Yehuda; Love, Robert T.; Schaefer, Dennis Ray; Chen, Jiangnan (Jason); Frank, Colin, Method and apparatus for pseudo-random noise offset reuse in a multi-sector CDMA system.
Blanchard Scott D. (Mesa AZ) Lester Joseph O. (Mesa AZ), Method and apparatus for real-time adaptive interference cancellation in dynamic environments.
Ho, Ming-Ju; Rawles, Michael Scott; Thomas, Raymond R.; Yen, Wen-Kai, Method and apparatus for reducing interference in non-stationary subscriber radio units using flexible beam selection.
Kasapi, Athanasios A.; Trott, Mitchell D.; Parrish, David M.; Barratt, Craig H., Method and apparatus for separting multiple users in a shared-channel communication system.
Classon,Brian K.; Baum,Kevin L.; Sartori,Philippe J., Method and apparatus for transmission and reception of narrowband signals within a wideband communication system.
Roche James R. (New Providence NJ) Wyner Aaron D. (Maplewood NJ), Method and apparatus for transmitting signals in a multi-tone code division multiple access communication system.
Ling,Fuyun; Walton,Jay R.; Howard,Steven J.; Wallace,Mark; Ketchum,John W., Method and apparatus for utilizing channel state information in a wireless communication system.
Uwe Sydon DE; Juergen Kockman DE; Paulus Sastrodjojo, Method and system for a wireless communication system incorporating channel selection algorithm for 2.4 GHz direct sequence spread spectrum cordless telephone system.
Reusens Peter Paul Frans,BEX ; Spruyt Paul Marie Pierre,BEX, Method and windowing unit to reduce leakage, fourier transformer and DMT modem wherein the unit is used.
Choi, Seung Hoon; Park, Sung Eun; Kim, Jae Yoel; Park, Dong Seek, Method for detecting initial operation mode in wireless communication system employing OFDMA scheme.
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.
Hee-Woon Kang KR; Jae-Yoel Kim KR; Jae-Min Ahn KR; Young-Ky Kim KR; Jong-Seon No KR; Ha-Bong Chung KR; Kyeong-Cheol Yang KR, Method for generating quasi-orthogonal code and spreader using the same in mobile communication system.
Kim,Eung Sun; Lee,Jong Hyeuk; Chung,Jae Hak; Kim,Ho Jin; Chun,Joo Hwan; Lee,Kyung Chun; Kim,Il Han, Method for grouping transmission antennas in mobile communication system including multiple transmission/reception antennas.
Kogiantis,Achilles G.; Moustakas,Aris L.; Ozarow,Lawrence H.; Simon,Steven H., Method for improved performance and reduced bandwidth channel state information feedback in communication systems.
Ahn, Jae-Min; Kim, Young-Ky; Yoon, Soon-Young; Kang, Hee-Won; Yie, Felix Kwang-Wook; Kong, Seung-Hyun, Method for inserting power control bits in the CDMA mobile system.
Rao,Manoharprasad K.; Prakah Asante,Kwaku O.; Strumolo,Gary Steven, Method for operating a pre-crash sensing system in a vehicle having a countermeasure system using stereo cameras.
Alamouti,Siavash; Battin,Jeffrey; Gibbons,David B.; Golden,James Timothy; Hirano,Michael R.; Hoole,Elliott; Jesse,Mary; Maxwell,Robert Lee; McMeekin,Steven E.; Nix,David J.; Ryan,David James; Veintim, Methods and apparatus for use in communicating voice and high speed data in a wireless communication system.
Laroia,Rajiv; Li,Junyi; Rangan,Sundeep; Srinivasan,Murari; Lane,Frank A.; Hande,Prashanth, Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems.
Kim,Sung jin; Kim,Ho jin; Lee,Ju ho; Kim,Ki ho; Lee,Hyeon woo, Mobile communication apparatus with multiple transmission and reception antennas and mobile communication method therefor.
Paik Woo H. (Encinitas CA) Lery Scott A. (Leucadia CA) Fox John M. (San Diego CA), Mode selective quadrature amplitude modulation communication system.
Dongming Hwang ; Malcolm Scott Ware ; Hua Ye, Modems, methods, and computer program products for recovering from errors in a tone reversal sequence between two modems.
Nissani (Nissensohn),Daniel Nathan, Multi input multi output wireless communication method and apparatus providing extended range and extended rate across imperfectly estimated channels.
Chang Gee-Kung ; Ellinas Georgios ; Graveman Richard ; Monma Clyde, Optical layer survivability and security system using optical label switching and high-speed optical header generation and detection.
Kim,Jae woo; Choi,Hoon soon, Physical layer unit for transmitting or receiving various signals, wireless LAN system including the same, and wireless LAN method using the wireless LAN system.
Laroia, Rajiv; Li, Junyi; Uppala, Sathyadev Venkata, Pilot use in orthogonal frequency division multiplexing based spread spectrum multiple access systems.
Wiorek Jonas,SEX ; Frodigh Magnus,SEX ; Beming Per,SEX ; Wallstedt Kenneth, Reuse of a physical control channel in a distributed cellular radio communication system.
Harel,Haim; Segalovitz,Alexander, Smart antenna based spectrum multiplexing using existing pilot signals for orthogonal frequency division multiplexing (OFDM) modulations.
Critchlow David N. (San Diego CA) Yehushua Moshe (San Diego CA) Avis Graham M. (San Diego CA) Heimbigner Wade L. (Poway CA) Johnson Karle J. (Carlsbad CA) Wiley George A. (San Diego CA), Subscriber unit for wireless digital subscriber communication system.
Ma, Jianglei; Jia, Ming; Zhu, Peiying; Tong, Wen, System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design.
Light Jeffrey Ross ; Liu Chung-Zin ; Varvaro Charles, System and method for CDMA handoff using telemetry to determine the need for handoff and to select the destination cell site.
Dulin, David R.; Kasturia, Sanjay; Mishra, Partho; Paulraj, Arogyaswami J.; Peters, Matthew S., System and method for data transmission from multiple wireless base transceiver stations to a subscriber unit.
Toskala, Antti; Malkamaki, Esa; Rinne, Mikko J.; Virtanen, Anu; Hao, Guan; Derryberry, R. Thomas, System and method for random access channel capture with automatic retransmission request.
Hashem,Bassam M.; Fituri,Eman A.; Earnshaw,Mark, System and method for time slotted code division multiple access communication in a wireless communication environment.
Catreux, Severine; Gesbert, David; Airy, Manish, System and method of dynamically optimizing a transmission mode of wirelessly transmitted information.
Osamu Itokawa JP, Video reproducing apparatus which demultiplexes a plurality of video programs and outputs a plurality of program numbers (attribute data) in parallel.
Crilly, Jr., William J.; Biba, Ken; Conley, Robert J., Wireless packet switched communication systems and networks using adaptively steered antenna arrays.
Khandekar, Aamod; Gorokhov, Alexei; Agrawal, Avneesh; Rangan, Sundeep; Das, Arnab, Acknowledgement of control messages in a wireless communication system.
Ji, Tingfang; Naguib, Ayman; Sutivong, Arak; Gore, Dhananjay Ashok; Gorokhov, Alexei, Channel structures for a quasi-orthogonal multiple-access communication system.
Ji, Tingfang; Naguib, Ayman; Sutivong, Arak; Gore, Dhananjay Ashok; Gorokhov, Alexei, Channel structures for a quasi-orthogonal multiple-access communication system.
Kadous, Tamer; Khandekar, Aamod; Gore, Dhananjay Ashok; Gorokhov, Alexei, Method and apparatus for antenna diversity in multi-input multi-output communication systems.
Teague, Edward Harrison; Ulupinar, Fatih; Prakash, Rajat; Khandekar, Aamod, Method and apparatus for bootstraping information in a communication system.
Kadous, Tamer; Khandekar, Aamod; Gore, Dhananjay Ashok; Gorokhov, Alexei, Method and apparatus for providing antenna diversity in a wireless communication system.
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.
Gorokhov, Alexei; Naguib, Ayman Fawzy; Sutivong, Arak; Gore, Dhananjay Ashok; Ji, Tingfang, Pilot signal transmission for an orthogonal frequency division wireless communication system.
Gorokhov, Alexei; Naguib, Ayman Fawzy; Sutivong, Arak; Gore, Dhananjay Ashok; Ji, Tingfang, Pilot signal transmission for an orthogonal frequency division wireless communication system.
Gorokhov, Alexei; Naguib, Ayman Fawzy; Sutivong, Arak; Gore, Dhananjay Ashok; Ji, Tingfang, Pilot signal transmission for an orthogonal frequency division wireless communication system.
Khandekar, Aamod Dinkar; Gorokhov, Alexei Yurievitch; Agrawal, Avneesh; Vijayan, Rajiv; Teague, Edward Harrison; Ulupinar, Fatih, Scalable frequency band operation in wireless communication systems.
Khandekar, Aamod; Gorokhov, Alexei; Agrawal, Avneesh; Vijayan, Rajiv; Teague, Edward Harrison; Ulupinar, Fatih, Scalable frequency band operation in wireless communication systems.
Sampath, Hemanth; Kadous, Tamer; Gorokhov, Alexei; Gore, Dhananjay Ashok, Systems and methods for beamforming and rate control in a multi-input multi-output communication systems.
Sampath, Hemanth; Khandekar, Aamod; Gore, Dhananjay Ashok; Gorokhov, Alexei; Kadous, Tamer, Systems and methods for beamforming feedback in multi antenna communication systems.
Sampath, Hemanth; Gorokhov, Alexei; Khandekar, Aamod; Teague, Edward Harrison; Julian, David Jonathan; Kadous, Tamer; Sutivong, Arak, Systems and methods for control channel signaling.
Gorokhov, Alexei; Khandekar, Aamod; Teague, Edward Harrison; Sampath, Hemanth, Varied signaling channels for a reverse link in a wireless communication system.
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