公开(公告)号：HK1093819A1

公开(公告)日：2007-03-09

申请号：HK06112517

申请日：2006-11-14

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW ,  SHIU DA-SHAN ,  PATTERSON DAVID M ,  SUBRAHMANYA PARVATHANATHAN ,  TERASAWA DAISUKE

IPC: H04J13/00 ,  H04Q7/38

Abstract: A method and apparatus for using information about a mobile terminal's location relative to a base station can improve performance of a communication system. In addition, information about the mobile terminal's velocity relative to the base station may be used to improve performance of the communication system. The location information may be used to estimate a nominal PN offset, and a set of PN offset to use, for processing communication signals. The velocity information may be used to estimate a nominal frequency of the communication signals.

公开(公告)号：DE60023497T2

公开(公告)日：2006-08-03

申请号：DE60023497

申请日：2000-06-07

Applicant: QUALCOMM INC

Inventor： TERASAWA DAISUKE ,  AGRAWAL AVNEESH

IPC: H04B1/7097 ,  H04B1/7075 ,  H04B7/26 ,  H04J13/00 ,  H04L7/04

Abstract: A method for mitigating the effect of interference between a first base station and a second base station, the first base station and second base stations both sharing a same primary synchronization code. The method includes generating a primary synchronization channel having the primary synchronization code. In a W-CDMA system, all base stations share this primary synchronization code, causing code timing collisions. The present invention includes rotating the primary synchronization channel in phase according to a phase rotation sequence before transmitting the primary synchronization channel. By rotating the primary synchronization channel in phase according to the phase rotation sequence, the interference can be reduced. The phase rotation sequence may be pseudorandom in phase. The phase rotation sequence may include changing phase once per slot, or alternately once per frame. The phase rotation sequence may also be based at least in part on a secondary synchronization code.

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：AT308164T

公开(公告)日：2005-11-15

申请号：AT00939622

申请日：2000-06-07

Applicant: QUALCOMM INC

Inventor： TERASAWA DAISUKE ,  AGRAWAL AVNEESH

IPC: H04B1/7097 ,  H04B1/7075 ,  H04B7/26 ,  H04J13/00 ,  H04L7/04 ,  H04B1/707

Abstract: A method for mitigating the effect of interference between a first base station and a second base station, the first base station and second base stations both sharing a same primary synchronization code. The method includes generating a primary synchronization channel having the primary synchronization code. In a W-CDMA system, all base stations share this primary synchronization code, causing code timing collisions. The present invention includes rotating the primary synchronization channel in phase according to a phase rotation sequence before transmitting the primary synchronization channel. By rotating the primary synchronization channel in phase according to the phase rotation sequence, the interference can be reduced. The phase rotation sequence may be pseudorandom in phase. The phase rotation sequence may include changing phase once per slot, or alternately once per frame. The phase rotation sequence may also be based at least in part on a secondary synchronization code.

公开(公告)号：MXPA05004316A

公开(公告)日：2005-08-26

申请号：MXPA05004316

申请日：2003-10-24

Applicant: QUALCOMM INC

Inventor： TERASAWA DAISUKE

IPC: H04B7/02 ,  H04B7/06 ,  H04L12/56 ,  H04W64/00 ,  H04W99/00

Abstract: Se describe un metodo y aparato para determinar un modo operacinal para su uso en un sistema de comunicaciones inalambricas con base en una ubicacion, una velocidad, o ambas, de un dispositivo de comunicaciones inalambricas (WCD) con relacion a una infraestructura de red inalambrica. El modo seleccionado puede utilizarse por diversos dispositivos dentro del sistema de comunicaciones. Los modos que se selecciona incluyen diversidad de transmision y diversidad de seleccion de sitio.

公开(公告)号：AU2003263018A8

公开(公告)日：2004-03-19

申请号：AU2003263018

申请日：2003-08-29

Applicant: QUALCOMM INC

Inventor： TERASAWA DAISUKE ,  PATTERSON DAVID M ,  SENDONARIS ANDREW ,  SHIU DA-SHAN ,  SUBRAHMANYA PARVATHANATHAN

IPC: H04J13/00 ,  H04Q7/38 ,  H04B1/707

Abstract: A method and apparatus for using information about a mobile terminal's location relative to a base station can improve performance of a communication system. In addition, information about the mobile terminal's velocity relative to the base station may be used to improve performance of the communication system. The location information may be used to estimate a nominal PN offset, and a set of PN offset to use, for processing communication signals. The velocity information may be used to estimate a nominal frequency of the communication signals.

公开(公告)号：AU2002259317A1

公开(公告)日：2002-12-09

申请号：AU2002259317

申请日：2002-05-31

Applicant: QUALCOMM INC

Inventor： SUTIVONG ARAK ,  TERASAWA DAISUKE ,  KATSURI NITIN ,  AGRAWAL AVNEESH ,  DHAWAN RAJAT RAJINDERKUMAR

IPC: H04J13/00 ,  H04L1/00 ,  H04L1/08 ,  H04J13/04 ,  H04B7/26

Abstract: Techniques for efficient W-CDMA modulation are disclosed. In one aspect, a multiplexing/coding chain for use in modulation such as that defined by the W-CDMA specification is disclosed. In another aspect, transport blocks are processed and concatenated, utilizing memory efficiently. This aspect has the further benefit of preparing transport channels for efficient subsequent processing. It also allows for ease of interface with the transport channel source. In another aspect, the use of repeated channel coding is used in lieu of an interleaver memory to provide channel coding and interleaving. These aspects, collectively, yield the advanced benefits of a system, such as W-CDMA, in a hardware efficient manner. The techniques described herein apply equally to both access points and access terminals. The techniques are not limited to W-CDMA systems; they are quite suitable to other systems requiring the various benefits the invention offers. Various other aspects of the invention are also presented.

公开(公告)号：BR0008497A

公开(公告)日：2002-09-24

申请号：BR0008497

申请日：2000-02-25

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  TERASAWA DAISUKE ,  SARKAR SANDIP ,  JOU YU-CHEUN ,  ODENWALDER JOSEPH P ,  SHANBHAG ABIHIJT ,  WILLENEGGER SERGE

IPC: H04B1/7073 ,  H04J3/06 ,  H04J13/00 ,  H04W36/08 ,  H04W56/00 ,  H04Q7/38

Abstract: A method and system that enables faster acquisition of the forward link signal of a target base station in a mixed network of synchronous and asynchronous base stations is disclosed. The serving base station transmits in a neighbor list an estimated timing error 417 between the serving base station and a target base station. By utilizing the timing information, a mobile station estimates the relative time offset 408 between forward link signals received from the serving base station and signals received from the target base station. Timing information acquired during handoff enables accurate updating of the estimated timing error 417 subsequently transmitted in the neighbor lists by the base stations.