公开(公告)号：AU5468200A

公开(公告)日：2000-12-28

申请号：AU5468200

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：CA2364962A1

公开(公告)日：2000-08-31

申请号：CA2364962

申请日：2000-02-25

Applicant: QUALCOMM INC

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

IPC: H04B7/26 ,  H04J3/06 ,  H04J13/00 ,  H04J13/18 ,  H04L7/00 ,  H04W48/12 ,  H04W56/00 ,  H04Q7/38

Abstract: A method and system for generating forward link channels in a synchronous CD MA base station having a pilot pseudonoise (PN) sequence with a pilot PN sequen ce offset. In one embodiment, the method includes the steps of generating a syn c channel (302) including a sync channel message; generating an identification channel including at least the pilot PN sequence offset; and orthogonalizing the sync channel and the identification channel. The identification channel and the sync channel are both transmitted. However, the mobile station may g et the pilot PN offset from the identification channel quickly, rather than having to demodulate the entire sync channel message. The identification channel may further include an indication of the phase of the pilot PN sequence, and the epoch of the pilot PN sequence. In one embodiment, the method includes encoding the identification channel using a Golay code.

公开(公告)号：AU5589299A

公开(公告)日：2000-03-21

申请号：AU5589299

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 ,  H04B7/00

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：WO02098036A3

公开(公告)日：2003-04-17

申请号：PCT/US0217040

申请日：2002-05-31

Applicant: QUALCOMM INC

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

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

CPC classification number: H04L1/0071 ,  H04J13/00 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/08

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.

Abstract translation: 公开了用于高效W-CDMA调制的技术。 在一方面，公开了一种用于诸如由W-CDMA规范定义的调制的复用/编码链。 在另一方面，传输块被有效地利用存储器来处理和级联。 这方面具有进一步的益处，即准备运输渠道以进行有效的后续处理。 它还允许便于与传输信道源的接口。 在另一方面，使用重复信道编码来代替交织器存储器来提供信道编码和交织。 这些方面集体地以硬件有效的方式产生诸如W-CDMA的系统的先进优点。 本文描述的技术同样适用于接入点和接入终端。 这些技术不限于W-CDMA系统; 它们非常适合于需要本发明提供的各种益处的其它系统。 还提出了本发明的各种其它方面。

公开(公告)号：WO0221716A3

公开(公告)日：2002-06-06

申请号：PCT/US0126947

申请日：2001-08-28

Applicant: QUALCOMM INC

Inventor： LIN JEREMY H ,  AGRAWAL AVNEESH ,  TERASAWA DAISUKE

IPC: H04B1/707 ,  H04Q7/38

CPC classification number: H04B1/707 ,  H04B1/70751 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: Techniques for generating a reference signal based on time-multiplexed pilot data. A modulated signal is received (FIG. 7) and processed to provide received samples, which are then further processed to provide pilot symbols. A reference signal is generated based on the available pilot symbols (722a, 722b). The reference signal comprises a sequence of "predicted" pilot symbols representative of future estimates of one or more characteristics (e.g., the phase and amplitude) of one or more carrier signals used to generate the modulated signal (FIG's 5A-5E). The reference signal can be generated using a number of techniques. For example, the reference signal can be generated by (e.g., linearly) extrapolating pilot symbols from prior time intervals (FIG. 5B), curve fitting the pilot symbols (FIG. 5C), or (normal or ensemble) averaging (unweighted or weighted) pilot symbols (FIG's 5D, 5E). For the W-CDMA standard, the processing to generate the pilot symbols typically includes decovering the received samples with a channelization code to provide channelized symbols (720a, 720b), and multiplying the channelized symbols with a particular pilot symbol pattern. The pilot symbols from each slot may also be filtered to generate one or more filtered pilot symbols.

Abstract translation: 基于时分复用导频数据产生参考信号的技术。 接收调制信号（图7）并进行处理以提供接收的样本，然后进一步处理以提供导频符号。 基于可用导频符号（722a，722b）生成参考信号。 参考信号包括代表用于产生调制信号的一个或多个载波信号的一个或多个特性（例如，相位和幅度）的未来估计的“预测”导频符号序列（图5A-5E）。 可以使用许多技术来产生参考信号。 例如，参考信号可以通过（例如，线性地）从先前的时间间隔（图5B）推导导频符号，拟合导频符号（图5C）或（正常或合并）平均（未加权或加权的） ）导频符号（图5D，5E）。 对于W-CDMA标准，用于生成导频符号的处理通常包括用信道化码来解码所接收的样本，以提供信道化符号（720a，720b），并将信道化符号与特定导频符号模式相乘。 也可以对来自每个时隙的导频符号进行滤波以产生一个或多个滤波的导频符号。

公开(公告)号：DE60326284D1

公开(公告)日：2009-04-02

申请号：DE60326284

申请日：2003-08-29

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：DE60134865D1

公开(公告)日：2008-08-28

申请号：DE60134865

申请日：2001-09-05

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  TERASAWA DAISUKE

IPC: H04B7/26 ,  H04J13/20 ,  H04B1/7117 ,  H04J11/00 ,  H04J13/00 ,  H04Q7/38

Abstract: Techniques for recovering data transmitted on a physical channel in which the channelization code is not known at the time of the data recovery. A modulated signal is received an processed to provide received samples. A hypothesized channelization code (e.g., an OVSF code in the W-CDMA system) is selected and used to process the received samples to generate partially processed symbols. The hypothesized channelization code is a "base" code that can be used to generate all possible channelization codes that may have been used for the physical channel. Intermediate results representative of the partially processed symbols are stored and, upon determination of the actual channelization code, further processed in accordance with the actual and hypothesized channelization codes to provide the final results.

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：DE60126932D1

公开(公告)日：2007-04-12

申请号：DE60126932

申请日：2001-05-18

Applicant: QUALCOMM INC

Inventor： TERASAWA DAISUKE ,  GRILLI FRANCESCO ,  WILLENEGGER SERGE

IPC: H04B7/26 ,  H04J3/06 ,  H04W24/08 ,  H04W36/18 ,  H04W56/00

Abstract: A novel and improved method and apparatus, in a WCDMA communication system, for informing a mobile station of a downlink data frame time offset by determining the downlink data frame time offset, and transmitting the downlink data frame time offset via an Active Set Update message transmitted from a cell to mobile station. Once an Active Set Update message is received, the data frame time offset information is provided to a timing block which may determine data frame boundary of each downlink signal. Timing block may then adjust the PN sequence timing corresponding to the downlink signal associated with the data frame time offset such that corresponding data symbols in each data frame are correctly soft combined in a combiner.