公开(公告)号：EP1388231B1

公开(公告)日：2007-06-20

申请号：EP02737005.5

申请日：2002-05-15

申请人： QUALCOMM INCORPORATED

发明人： WALTON, Jay, R. ,  WALLACE, Mark ,  HOWARD, Steven, J.

IPC分类号： H04L1/06

CPC分类号： H04W16/00 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/061 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/06 ,  H04L25/0204 ,  H04L2025/03426 ,  H04W16/28 ,  H04W84/14

摘要： Techniques to schedule downlink data transmission to a number of terminals in a wireless communication system. In one method, one or more sets of terminals are formed for possible data transmission, with each set including a unique combination of one or more terminals and corresponding to a hypothesis to be evaluated. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to specific assignments of a number of transmit antennas to the one or more terminals in the hypothesis. The performance of each sub-hypothesis is then evaluated, and one of the evaluated sub-hypotheses is selected based on their performance. The terminal(s) in the selected sub-hypothesis are then scheduled for data transmission, and data is thereafter coded, modulated, and transmitted to each scheduled terminal from one or more transmit antenna assigned to the terminal.

公开(公告)号：EP1442538A1

公开(公告)日：2004-08-04

申请号：EP02778726.6

申请日：2002-11-05

申请人： QUALCOMM Incorporated

发明人： WALTON, Jay, R. ,  WALLACE, Mark ,  HOWARD, Steven, J.

IPC分类号： H04B7/06 ,  H04B7/08 ,  H04L1/06

CPC分类号： H04B7/0417 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/066 ,  H04B7/0689 ,  H04B7/0891 ,  H04L1/0026 ,  H04L1/0687 ,  H04L1/0693

摘要： Techniques to achieve better utilization of the available resources and robust performance for the downlink and uplink in a multiple-access MIMO system. Techniques are provided to adaptively process data prior to transmission, based on channel state information, to more closely match the data transmission to the capacity of the channel. Various receiver processing techniques are provided to process a data transmission received via multiple antennas at a receiver unit. Adaptive reuse schemes and power back-off are also provided to operate the cells in the system in a manner to further increase the spectral efficiency of the system (e.g., reduce interference, improve coverage, and attain high throughput). Techniques are provided to efficiently schedule data transmission on the downlink and uplink. The scheduling schemes may be designed to optimize transmissions (e.g., maximize throughput) for single or multiple terminals in a manner to meet various constraints and requirements.

公开(公告)号：EP1384334A2

公开(公告)日：2004-01-28

申请号：EP02729132.7

申请日：2002-05-02

申请人： QUALCOMM INCORPORATED

发明人： WALTON, Jay, R.

IPC分类号： H04B7/005

CPC分类号： H04W52/343 ,  H04W16/04 ,  H04W72/06

摘要： Techniques to partition and allocate the available system resources among cells in a communication system, and to allocate the resources in each cell to terminals for data transmission on the uplink. In one aspect, adaptive reuse schemes are provided wherein the available system resources may be dynamically and/or adaptively partitioned and allocated to the cells based on a number of factors such as the observed interference levels, loading conditions, system requirements, and so on. A reuse plan is initially defined and may be redefined to reflect changes in the system. In another aspect, the system resources may be partitioned such that each cell is allocated a set of channels having different performance levels. In yet another aspect, terminals in each cell are scheduled for data transmission (e.g., based on their priority or load requirements) and assigned channels based on their tolerance to interference and the channels' performance.

公开(公告)号：EP1371147A2

公开(公告)日：2003-12-17

申请号：EP02753807.3

申请日：2002-03-22

申请人： QUALCOMM INCORPORATED

发明人： LING, Funyun ,  WALTON, Jay, R. ,  HOWARD, Steven, J. ,  WALLACE, Mark ,  KETCHUM, John, W.

IPC分类号： H04B7/00

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0854 ,  H04B7/0891 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0091 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/0248 ,  H04L25/03159 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input multiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from the transmitter unit. The received signals are processed to derive channel state information (CSI) indicative of characteristics of a number of transmission channels used for data transmission. The CSI is transmitted back to the transmitter unit. At the transmitter unit, the CSI from the receiver unit is received and data for transmission to the receiver units is processed based on the received CSI.

公开(公告)号：EP1269665A2

公开(公告)日：2003-01-02

申请号：EP01918901.8

申请日：2001-03-20

申请人： QUALCOMM INCORPORATED

发明人： WALLACE, Mark ,  WALTON, Jay, R. ,  JALALI, Ahmad

IPC分类号： H04B17/00

CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0673 ,  H04B7/08 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/0029 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0091 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/08 ,  H04W52/42

摘要： A method and apparatus for transmitting in a multi-antenna communication system (100). Each of a plurality of antennas (116,122) are assigned with a different one of a plurality of groups of sub-bands. The plurality of groups of sub-bands each include a different sub-set of the plurality of sub-bands, where the plurality of sub-bands of a first group are non-contiguous. Transmitting from the plurality of antennas (116) and simultaneously using the plurality of groups of sub-bands, where transmitting from each antenna (116) occurs on the group of sub-bands assigned to the antenna (116). A base station for use in the multi-antenna communication system (100) including a first processor (332) for pre-conditioning transmission data, assigning a plurality of pilot symbols to the plurality of transmit antennas (116), and assigning a plurality of sub-channel sub-sets to the plurality of antennas (116). The plurality of antennas (116) transmit each of the assigned plurality of pilot symbols over their respectiven assigned sub-channel sub-sets.

公开(公告)号：EP1451964B1

公开(公告)日：2018-08-29

申请号：EP02792324.2

申请日：2002-12-03

申请人： QUALCOMM INCORPORATED

发明人： KETCHUM, John, W. ,  WALLACE, Mark ,  HOWARD, Steven, J. ,  WALTON, Jay, R.

IPC分类号： H04L1/00 ,  H04L25/03

CPC分类号： H04B7/0417 ,  H04B7/0443 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0029 ,  H04L25/03343 ,  H04L25/03834 ,  H04L27/2601 ,  H04L27/2647 ,  H04L2025/0349 ,  H04L2025/03605

摘要： Techniques for processing a data transmission at the transmitter and receiver. In an aspect, a time-domain implementation is provided which uses frequency-domain singular value decomposition and "water-pouring" results to derive time-domain pulse-shaping and beam-steering solutions at the transmitter and receiver. The singular value decomposition is performed at the transmitter to determine eigen-modes (i.e., spatial subchannels) of the MIMO channel and to derive a first set of steering vectors used to "precondition" modulation symbols. The singular value decomposition is also performed at the receiver to derive a second set of steering vectors used to precondition the received signals such that orthogonal symbol streams are recovered at the receiver, which can simplify the receiver processing. Water-pouring analysis is used to more optimally allocate the total available transmit power to the eigen-modes, which then determines the data rate and the coding and modulation scheme to be used for each eigen-mode.

公开(公告)号：EP1269665B1

公开(公告)日：2016-05-18

申请号：EP01918901.8

申请日：2001-03-20

申请人： QUALCOMM INCORPORATED

发明人： WALLACE, Mark ,  WALTON, Jay, R. ,  JALALI, Ahmad

IPC分类号： H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04L1/00 ,  H04L5/00 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04W52/08 ,  H04W52/42

CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0673 ,  H04B7/08 ,  H04B7/12 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/0029 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0091 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2613 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/08 ,  H04W52/42

摘要： A method and apparatus for transmitting in a multi-antenna communication system (100). Each of a plurality of antennas (116,122) are assigned with a different one of a plurality of groups of sub-bands. The plurality of groups of sub-bands each include a different sub-set of the plurality of sub-bands, where the plurality of sub-bands of a first group are non-contiguous. Transmitting from the plurality of antennas (116) and simultaneously using the plurality of groups of sub-bands, where transmitting from each antenna (116) occurs on the group of sub-bands assigned to the antenna (116). A base station for use in the multi-antenna communication system (100) including a first processor (332) for pre-conditioning transmission data, assigning a plurality of pilot symbols to the plurality of transmit antennas (116), and assigning a plurality of sub-channel sub-sets to the plurality of antennas (116). The plurality of antennas (116) transmit each of the assigned plurality of pilot symbols over their respectiven assigned sub-channel sub-sets.

公开(公告)号：EP1386424B1

公开(公告)日：2012-09-19

申请号：EP02736690.5

申请日：2002-05-07

申请人： QUALCOMM INCORPORATED

发明人： WALTON, Jay, R. ,  WALLACE, Mark ,  KETCHUM, John, W. ,  HOWARD, Steven, J.

IPC分类号： H04B7/08 ,  H04B7/06 ,  H04L1/06

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/10 ,  H04B7/12 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0071

摘要： Techniques to 'successively' process received signals at a receiver unit in a MIMO system to recover transmitted data, and to 'adaptively' process data at a transmitter unit based on channel state information available for the MIMO channel. A successive cancellation receiver processing technique is used to process the received signals and performs a number of iterations to provide decoded data streams. For each iteration, input (e.g., received) signals for the iteration are processed to provide one or more symbol streams. One of the symbol streams is selected and processed to provide a decoded data stream. The interference due to the decoded data stream is approximately removed (i.e., canceled) from the input signals provided to the next iteration. The channel characteristics are estimated and reported back to the transmitter system and used to adjust (i.e., adapt) the processing (e.g., coding, modulation, and so on) of data prior to transmission.

公开(公告)号：EP1556983A2

公开(公告)日：2005-07-27

申请号：EP03779264.5

申请日：2003-10-27

申请人： Qualcomm, Incorporated

发明人： WALTON, Jay, R. ,  KETCHUM, John, W. ,  WALLACE, Mark ,  HOWARD, Steven, J.

IPC分类号： H04L1/06 ,  H04L27/26

CPC分类号： H04L27/261 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/03343 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/2647 ,  H04L2001/0093 ,  H04W28/20 ,  H04W52/50

摘要： For transmit diversity in a multi-antenna OFDM system, a transmitter encodes, interleaves, and symbol maps traffic data to obtain data symbols. The transmitter processes each pair of data symbols to obtain two pairs of transmit symbols for transmission from a pair of antennas either (1) in two OFDM symbol periods for space-time transmit diversity or (2) on two subbands for space-frequency transmit diversity. NT ⋅ (NT - 1)/2 different antenna pairs are used for data transmission, with different antenna pairs being used for adjacent subbands, where NT is the number of antennas. The system may support multiple OFDM symbol sizes. The same coding, interleaving, and modulation schemes are used for different OFDM symbol sizes to simplify the transmitter and receiver processing. The transmitter performs OFDM modulation on the transmit symbol stream for each antenna in accordance with the selected OFDM symbol size. The receiver performs the complementary processing.

公开(公告)号：EP1386424A1

公开(公告)日：2004-02-04

申请号：EP02736690.5

申请日：2002-05-07

申请人： QUALCOMM INCORPORATED

发明人： WALTON, Jay, R. ,  WALLACE, Mark ,  KETCHUM, John, W. ,  HOWARD, Steven, J.

IPC分类号： H04B7/08 ,  H04B7/06 ,  H04L1/06

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/10 ,  H04B7/12 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0071

摘要： Techniques to 'successively' process received signals at a receiver unit in a MIMO system to recover transmitted data, and to 'adaptively' process data at a transmitter unit based on channel state information available for the MIMO channel. A successive cancellation receiver processing technique is used to process the received signals and performs a number of iterations to provide decoded data streams. For each iteration, input (e.g., received) signals for the iteration are processed to provide one or more symbol streams. One of the symbol streams is selected and processed to provide a decoded data stream. The interference due to the decoded data stream is approximately removed (i.e., canceled) from the input signals provided to the next iteration. The channel characteristics are estimated and reported back to the transmitter system and used to adjust (i.e., adapt) the processing (e.g., coding, modulation, and so on) of data prior to transmission.