公开(公告)号：DE60132074T2

公开(公告)日：2008-12-11

申请号：DE60132074

申请日：2001-03-15

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  BAO GANG

IPC: H04B7/26 ,  H04B7/005 ,  H04L1/00 ,  H04L12/28 ,  H04W52/16 ,  H04W52/26 ,  H04W72/12

Abstract: A method and apparatus for selecting a favored transmission slot for communicating non-voice data in conjunction with a voice-data communication. The slot, reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel, is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The favored transmission slot is selected without the remote station messaging information to the base station concerning frequency channel or interference information for the supplemental channel. A method of performing forward-link scheduling in a wireless communication system includes determining the available base station power at the beginning of a frame, predicting the required transmit power at the beginning of the frame for each supplemental channel, determining rates sustainable with the predicted transmit power, dividing by throughput over a recent window to obtain a supplemental channel priority index, and allowing the supplemental channel with the highest priority index to transmit over the next frame.

公开(公告)号：DE60039614D1

公开(公告)日：2008-09-04

申请号：DE60039614

申请日：2000-09-29

Applicant: QUALCOMM INC

Inventor： CHEN TAO ,  LING FUYUN ,  HOLTZMAN JACK ,  JOU YU-CHEUN ,  LUNDBY STEIN A

IPC: H04B7/02 ,  H04J99/00 ,  H01Q1/24 ,  H01Q3/26 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/26

Abstract: A method and apparatus for wireless communications wherein a base station transmits a signal to sending data to a subscriber station through a signal beam that sweeps through the coverage area of the base station. User data addressed to the subscriber station is buffered until the signal beam angle of the signal beam allows efficient transmission. The base station may alter the beam sweep speed or the shape of the beam's radiation pattern over time to maximize system efficiency and capacity.

公开(公告)号：DE69939078D1

公开(公告)日：2008-08-21

申请号：DE69939078

申请日：1999-08-30

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  TERASAWA DAISUKE ,  RAZOUMOV LEONID

IPC: H04L27/26 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L25/03 ,  H04W52/04

Abstract: The invention provides a method and apparatus for reducing transmission signal power or interference of transmitted communication signals suitable for use in a communication system having a base station and a plurality of user stations that exchange communication signals with the base station. An input node receives channel data for transmission on a plurality of channels to the plurality of user stations, wherein the channel data includes pilot symbol data. A processor determines symbol positions in which each of the plurality of user stations expect to find pilot symbols. A transmitter transmits to the plurality of user stations pilot symbols only in symbol positions that the plurality of user stations expect to find pilot symbols, and failing to transmit pilot symbols in other symbol positions.

公开(公告)号：AT400956T

公开(公告)日：2008-07-15

申请号：AT05018036

申请日：1999-08-30

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  TERASAWA DAISUKE ,  RAZOUMOV LEONID

IPC: H04L27/26 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L25/03 ,  H04W52/04

Abstract: The invention provides a method and apparatus for reducing transmission signal power or interference of transmitted communication signals suitable for use in a communication system having a base station and a plurality of user stations that exchange communication signals with the base station. An input node receives channel data for transmission on a plurality of channels to the plurality of user stations, wherein the channel data includes pilot symbol data. A processor determines symbol positions in which each of the plurality of user stations expect to find pilot symbols. A transmitter transmits to the plurality of user stations pilot symbols only in symbol positions that the plurality of user stations expect to find pilot symbols, and failing to transmit pilot symbols in other symbol positions.

公开(公告)号：AT382213T

公开(公告)日：2008-01-15

申请号：AT01924181

申请日：2001-03-15

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  BAO GANG

IPC: H04B7/26 ,  H04B7/005 ,  H04L1/00 ,  H04L12/28 ,  H04W52/16 ,  H04W52/26 ,  H04W72/12

Abstract: A method and apparatus for selecting a favored transmission slot for communicating non-voice data in conjunction with a voice-data communication. The slot, reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel, is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The favored transmission slot is selected without the remote station messaging information to the base station concerning frequency channel or interference information for the supplemental channel. A method of performing forward-link scheduling in a wireless communication system includes determining the available base station power at the beginning of a frame, predicting the required transmit power at the beginning of the frame for each supplemental channel, determining rates sustainable with the predicted transmit power, dividing by throughput over a recent window to obtain a supplemental channel priority index, and allowing the supplemental channel with the highest priority index to transmit over the next frame.

公开(公告)号：DE69928269T2

公开(公告)日：2006-07-13

申请号：DE69928269

申请日：1999-08-30

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  TERASAWA DAISUKE ,  RAZOUMOV LEONID

IPC: H04L27/26 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L25/03 ,  H04W52/04

Abstract: The invention provides a method and apparatus for reducing transmission signal power or interference of transmitted communication signals suitable for use in a communication system having a base station and a plurality of user stations that exchange communication signals with the base station. An input node receives channel data for transmission on a plurality of channels to the plurality of user stations, wherein the channel data includes pilot symbol data. A processor determines symbol positions in which each of the plurality of user stations expect to find pilot symbols. A transmitter transmits to the plurality of user stations pilot symbols only in symbol positions that the plurality of user stations expect to find pilot symbols, and failing to transmit pilot symbols in other symbol positions.

公开(公告)号：DE69928269D1

公开(公告)日：2005-12-15

申请号：DE69928269

申请日：1999-08-30

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  TERASAWA DAISUKE ,  RAZOUMOV LEONID

IPC: H04B1/707 ,  H04B1/7103 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L25/03 ,  H04L27/26 ,  H04W52/04

Abstract: The invention provides a method and apparatus for reducing transmission signal power or interference of transmitted communication signals suitable for use in a communication system having a base station and a plurality of user stations that exchange communication signals with the base station. An input node receives channel data for transmission on a plurality of channels to the plurality of user stations, wherein the channel data includes pilot symbol data. A processor determines symbol positions in which each of the plurality of user stations expect to find pilot symbols. A transmitter transmits to the plurality of user stations pilot symbols only in symbol positions that the plurality of user stations expect to find pilot symbols, and failing to transmit pilot symbols in other symbol positions.

公开(公告)号：AT309662T

公开(公告)日：2005-11-15

申请号：AT99942536

申请日：1999-08-30

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  TERASAWA DAISUKE ,  RAZOUMOV LEONID

IPC: H04B1/707 ,  H04B1/7103 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L25/03 ,  H04L27/26 ,  H04W52/04

Abstract: The invention provides a method and apparatus for reducing transmission signal power or interference of transmitted communication signals suitable for use in a communication system having a base station and a plurality of user stations that exchange communication signals with the base station. An input node receives channel data for transmission on a plurality of channels to the plurality of user stations, wherein the channel data includes pilot symbol data. A processor determines symbol positions in which each of the plurality of user stations expect to find pilot symbols. A transmitter transmits to the plurality of user stations pilot symbols only in symbol positions that the plurality of user stations expect to find pilot symbols, and failing to transmit pilot symbols in other symbol positions.

公开(公告)号：ES2241627T3

公开(公告)日：2005-11-01

申请号：ES00948765

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Método para reducir la interferencia de acceso múltiple entre señales de comunicación transmitidas, en un sistema de comunicación compuesto de una estación base (106) y una pluralidad de estaciones de usuario (102, 108) que intercambian señales de comunicación entre la estación base (106) y cada una de la pluralidad de estaciones de usuario (102, 108); dicho método comprende: recibir (204, 302, 304, 400 a 420) una pluralidad de señales de acceso múltiple por división de código; hallar (216, 402) una primera señal de la pluralidad de señales de acceso múltiple por división de código que tenga la mayor amplitud; recibir (204, 302, 304, 400 a 420) una primera señal piloto asociada a la primera señal; determinar (402, 410) parámetros desde la primera señal piloto; decodificar (402, 410) primeros datos de la primera señal: construir (404, 408) una primera réplica de la primera señal desde los primeros datos; combinar (414) la primera réplica con parámetros derivados de la primera señal piloto para suministrar una primera señal sustractiva; y restar (418) la primera señal sustractiva de la pluralidad de señales de acceso múltiple por división de código para suministrar una primera pluralidad reducida de señales de acceso múltiple por división de código, en donde combinar (414) la primera réplica con parámetros derivados de la primera señal piloto para suministrar una primera señal sustractiva comprende: determinar (410) una amplitud de la primera señal piloto; normalizar (410) la amplitud de la primera señal piloto para suministrar una primera amplitud normalizada: derivar (412) un peso de la primera amplitud normalizada; y multiplicar (414) la primera réplica por el peso.

公开(公告)号：DE60019429D1

公开(公告)日：2005-05-19

申请号：DE60019429

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  WARRIER DILIP G

IPC: H04B1/7103 ,  H04B1/00 ,  H04B1/10 ,  H04B1/707 ,  H04B1/7107 ,  H04B7/26

Abstract: Several methods and corresponding apparatus reduce multiple access interference in code division multiple access communications systems (100) through successive interference cancellation techniques. An estimate of reliability of cancellation of a strongest interfering signal is formed from analysis of a pilot signal associated with the strongest signal. The estimate is used to derive a weight that is multiplied by a replica of the strongest signal to provide a weighted replica. The weighted replica is subtracted from a delayed version of the received channel. As a result, interference cancellation is robustly implemented when the strongest signal replica is most likely to be accurate and is not robustly implemented when the strongest signal replica is not likely to be accurate.; This avoids combining a replica of the strongest signal with the received channel when the replica is more likely to contribute additional interference rather than reduce it.