公开(公告)号：AU2003287296B2

公开(公告)日：2009-02-19

申请号：AU2003287296

申请日：2003-10-24

Applicant: QUALCOMM INC

Inventor： KETCHUM JOHN W ,  HOWARD STEVEN J ,  WALTON JAY RODNEY ,  WALLACE MARK

IPC: H04J99/00 ,  H04L1/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

Abstract: A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transmits multiple data streams from multiple antennas to a single receiver without spatial processing at a transmitter, (3) a multi-user steered mode that transmits multiple data streams simultaneously to multiple receivers with spatial processing at a transmitter, and (4) a multi-user non-steered mode that transmits multiple data streams from multiple antennas (co-located or non co-located) without spatial processing at the transmitter(s) to receiver(s) having multiple antennas.; For each set of user terminal(s) selected for data transmission on the downlink and/or uplink, a spatial multiplexing mode is selected for the user terminal set from among the multiple spatial multiplexing modes supported by the system.

公开(公告)号：AU2006201688B2

公开(公告)日：2009-01-22

申请号：AU2006201688

申请日：2006-04-24

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  WALTON JAY RODNEY ,  WALLACE MARK

IPC: H04B17/00 ,  H04B7/06 ,  H04B7/08 ,  H04L25/02 ,  H04L27/26

公开(公告)号：DE60322840D1

公开(公告)日：2008-09-25

申请号：DE60322840

申请日：2003-02-19

Applicant: QUALCOMM INC

Inventor： MEDVEDEV IRINA ,  WALTON JAY R ,  WALLACE MARK

IPC: H04B7/06 ,  H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06 ,  H04L27/26

Abstract: Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a "beam-forming" transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a "multi-mode" transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment.

公开(公告)号：ES2287282T3

公开(公告)日：2007-12-16

申请号：ES02737005

申请日：2002-05-15

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  HOWARD STEVEN J

IPC: H04L1/06 ,  H04B7/04 ,  H04B7/06 ,  H04J99/00 ,  H04L1/00 ,  H04W16/00 ,  H04W16/28 ,  H04W84/14

Abstract: Un procedimiento para planificar la transmisión de datos de enlace descendente hacia una pluralidad de terminales (106) para un sistema (100) de comunicación inalámbrica, comprendiendo el sistema: formar uno o más juegos de terminales para posible transmisión de datos, en el cual cada juego incluye una combinación de uno o más terminales (106) y se corresponden con una hipótesis a evaluar; asignar una pluralidad de antenas (524) de transmisión a uno o más terminales (106) en cada juego; evaluar el rendimiento de cada hipótesis en función de parte de las asignaciones de antena para la hipótesis, en el cual cada hipótesis se evalúa en función de la información del estado del canal, en adelante CSI, para cada terminal (106) en la hipótesis, en el cual la CSI es indicadora de las características del canal entre las antenas (524) de transmisión y el terminal (106) seleccionar una de entre las una o más hipótesis evaluadas en función del rendimiento; y planificar transmisión de datos hasta el o los terminales (106) en la hipótesis seleccionada; y el procedimiento caracterizado por: priorizar la planificación de terminales (106).

公开(公告)号：AT360288T

公开(公告)日：2007-05-15

申请号：AT02753807

申请日：2002-03-22

Applicant: QUALCOMM INC

Inventor： LING FUNYUN ,  WALTON JAY R ,  HOWARD STEVEN J ,  WALLACE MARK ,  KETCHUM JOHN W

IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L27/26 ,  H04B7/00

Abstract: Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input mutiple-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：AU2006201688A1

公开(公告)日：2006-05-25

申请号：AU2006201688

申请日：2006-04-24

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  WALTON JAY RODNEY ,  WALLACE MARK

IPC: H04B17/00 ,  H04B7/06 ,  H04B7/08 ,  H04L25/02 ,  H04L27/26

公开(公告)号：BR0315520A

公开(公告)日：2005-09-27

申请号：BR0315520

申请日：2003-10-27

Applicant: QUALCOMM INC

Inventor： WALTON JAY RODNEY ,  KETCHUM JOHN W ,  WALLACE MARK ,  HOWARD STEVEN J

IPC: H04B7/005 ,  H04B7/06 ,  H04B7/08 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04W28/20 ,  H04W52/50

Abstract: 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：BR0313817A

公开(公告)日：2005-08-02

申请号：BR0313817

申请日：2003-08-19

Applicant: QUALCOMM INC

Inventor： MENON MURALI PARAVATH ,  KETCHUM JOHN W ,  WALLACE MARK ,  WALTON JAY ROD ,  HOWARD STEVEN J

IPC: H04J99/00 ,  H01Q3/26 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L27/26

Abstract: Techniques to perform beam-steering and beam-forming to transmit data on a single eigenmode in a wideband multiple-input channel. In one method, a steering vector is obtained for each of a number of subbands. Depending on how the steering vectors are defined, beam-steering or beam-forming can be achieved for each subband. The total transmit power is allocated to the subbands based on a particular power allocation scheme (e.g., full channel inversion, selective channel inversion, water-filling, or uniform). A scaling value is then obtained for each subband based on its allocated transmit power. Data to be transmitted is coded and modulated to provide modulation symbols. The modulation symbols to be transmitted on each subband are scaled with the subband's scaling value and further preconditioned with the subband's steering vector. A stream of preconditioned symbols is then formed for each transmit antenna.

公开(公告)号：HK1065665A1

公开(公告)日：2005-02-25

申请号：HK04108306

申请日：2004-10-21

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  HOWARD STEVEN J

IPC: H04B7/04 ,  H04B7/06 ,  H04J99/00 ,  H04L20100101 ,  H04L1/00 ,  H04L1/06 ,  H04W16/00 ,  H04W16/28 ,  H04W84/14

Abstract: 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：BR0209636A

公开(公告)日：2004-08-31

申请号：BR0209636

申请日：2002-05-15

Applicant: QUALCOMM INC

Inventor： WALTON JAY R ,  WALLACE MARK ,  HOWARD STEVEN J

IPC: H04B7/04 ,  H04B7/06 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04W16/00 ,  H04W16/28 ,  H04W84/14

Abstract: 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.