公开(公告)号：AT473617T

公开(公告)日：2010-07-15

申请号：AT99953000

申请日：1999-10-01

Applicant: QUALCOMM INC

Inventor： WALTON JAY ,  KETCHUM JOHN ,  HOWARD STEVEN ,  WALLACE MARK

IPC: H04L12/28 ,  H04W72/14 ,  H04B7/005 ,  H04B7/26 ,  H04W52/50

Abstract: A method and apparatus for controlling the transmission of signals from one or more of a plurality of mobile stations (1300) to a base station (1400) on a plurality of M multiple access channels. A power control information packet formed from a plurality of power control bits is transmitted from the base station (1400) to the one or more mobile stations (1300). Each of the power control bits in the power control information packet has a position that is mapped to a selected access channel and to a time offset within the selected access channel. The power control information packet is received at a first mobile station (1300). A message is then transmitted from the first mobile station (1300) to the base station (1400) on a first access channel and at a first time offset associated with the first access channel. The message is transmitted from the first mobile station (1300) at a power level determined in response to a first power control bit in the power control information packet. The first power control bit is located in a first position in the power control information packet, the first position being mapped to the first access channel and the first time offset.

公开(公告)号：ES2396563T3

公开(公告)日：2013-02-22

申请号：ES07103174

申请日：2002-03-22

Applicant: QUALCOMM INC

Inventor： LING FUYUN ,  WALTON JAY ,  HOWARD STEVEN ,  WALLACE MARK ,  KETCHUM JOHN W

IPC: H04B7/08 ,  H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L5/00 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

Abstract: Una unidad receptora (150A, 150B) para un sistema de comunicación de múltiple entrada y múltiple salida(MIMO), que comprende: una pluralidad de procesadores (154A, 154B) frontales configurados para recibir una pluralidad de señalesa través de una pluralidad de antenas de recepción y para proporcionar símbolos de modulación ( )medios (514, 614) acoplados a la pluralidad de procesadores frontales, para proporcionar símbolos demodulación recibidos según una estimación de características de canal entre una pluralidad de antenas detransmisión y la pluralidad de antenas de recepción utilizadas para la transmisión y símbolos demodulación,en el que los medios para proporcionar símbolos de modulación recibidos comprenden uno de un filtroadaptado (514) o un multiplicador de matriz de coeficiente de ponderación (614); un multiplicador (516, 616) acoplado a medios para proporcionar símbolos de modulación recibidos, paraproporcionar estimaciones de los símbolos de modulación recibidos que corresponden a lapluralidad de señales transmitidas; un estimador de calidad de canal (520, 620) acoplado al multiplicador para proporcionar estimaciones yconfigurado para estimar características de una pluralidad de canales de transmisión y proporcionarinformación de estado de canal, CSI, indicativa de las características de canal estimadas; y un procesador de datos de transmisión (162) configurado para recibir y procesar la CSI para transmisióndesde la unidad receptora.

公开(公告)号：AT425603T

公开(公告)日：2009-03-15

申请号：AT03781529

申请日：2003-10-24

Applicant: QUALCOMM INC

Inventor： WALTON JAY ,  KETCHUM JOHN ,  WALLACE MARK ,  HOWARD STEVEN

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.