公开(公告)号：SI2257008T1

公开(公告)日：2017-07-31

申请号：SI200432397

申请日：2004-12-13

Applicant: QUALCOMM INC

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

IPC: H04J99/00 ,  H04L25/00 ,  H04B7/005 ,  H04B7/02 ,  H04B7/06 ,  H04B7/12 ,  H04L1/02 ,  H04L5/00 ,  H04L25/03 ,  H04W52/00

公开(公告)号：ES2427934T3

公开(公告)日：2013-11-04

申请号：ES05766540

申请日：2005-06-27

Applicant: QUALCOMM INC

Inventor： WALLACE MARK ,  WALTON JAY ,  HOWARD STEVEN

IPC: H04B7/04 ,  H04J99/00 ,  H04B7/06 ,  H04B7/08

Abstract: Un procedimiento para obtener matrices de filtro espacial en un sistema de comunicaciones inalámbricas demúltiples entradas y múltiples salidas, que comprende: determinar una matriz de filtro espacial inicial; yobtener una pluralidad de matrices de filtro espacial para una pluralidad de periodos de transmisión detiempo y/o frecuencia en función de la matriz de filtro espacial inicial y una pluralidad de matrices deorientación usadas para la pluralidad de periodos de transmisión.

公开(公告)号：AT456199T

公开(公告)日：2010-02-15

申请号：AT05794158

申请日：2005-09-02

Applicant: QUALCOMM INC

Inventor： WALLACE MARK ,  MEDVEDEV IRINA ,  WALTON JAY

IPC: H04B7/08 ,  H04J99/00 ,  H04L1/06

Abstract: A receiving entity obtains received symbols for a data transmission having at least one data symbol stream sent with space-time transmit diversity (STTD). The receiving entity derives an overall channel response matrix in accordance with the STTD encoding scheme used for the data transmission, derives a spatial filter matrix based on the overall channel response matrix, and performs spatial matched filtering on a vector of received symbols for each 2-symbol interval to obtain a vector of detected symbols for the 2-symbol interval. The receiving entity may perform post-processing (e.g., conjugation) on the detected symbols if needed. Alternatively, the receiving entity derives a spatial filter matrix based on an effective channel response matrix, performs spatial matched filtering on the received symbols for each symbol period to obtain detected symbols for that symbol period, and combines multiple estimates obtained for each data symbol sent with STTD.

公开(公告)号：AT405040T

公开(公告)日：2008-08-15

申请号：AT03709260

申请日：2003-02-19

Applicant: QUALCOMM INC

Inventor： MEDVEDEV IRINA ,  WALTON JAY ,  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.