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公开(公告)号：AT396555T
公开(公告)日：2008-06-15
申请号：AT06022087
申请日：2001-05-18
Applicant: QUALCOMM INC
Inventor： TERASAWA DAISUKE , GRILLI FRANCESCO , WILLENEGGER SERGE
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.
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公开(公告)号：HK1079917A1
公开(公告)日：2006-04-13
申请号：HK05112178
申请日：2005-12-30
Applicant: QUALCOMM INC
Inventor： SENDONARIS ANDREW , SHIU DA-SHAN , PATTERSON DAVID M , SUBRAHMANYA PARVATHANATHAN , TERASAWA DAISUKE
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公开(公告)号：BR0111011A
公开(公告)日：2006-02-07
申请号：BR0111011
申请日：2001-05-18
Applicant: QUALCOMM INC
Inventor： TERASAWA DAISUKE , GRILLI FRANCESCO , WILLENEGGER SERGE
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.
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公开(公告)号：DE60023497D1
公开(公告)日：2005-12-01
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 , 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.
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公开(公告)号：HK1064534A1
公开(公告)日：2005-01-28
申请号：HK04107252
申请日：2004-09-21
Applicant: QUALCOMM INC
Inventor： KATSURI NITIN , DHAWAN RAJAT RAJIN-DERKUMAR , TERASAWA DAISUKE , AGRAWAL AVNEESH , SUTIVONG ARAK
IPC: H04B20060101 , H04J13/00 , H04L20060101 , H04L1/00 , 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.
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Patent Agency Ranking
公开(公告)号：HK1056051A1
公开(公告)日：2004-01-30
申请号：HK03108211
申请日：2003-11-12
Applicant: QUALCOMM INC
Inventor： TERASAWA DAISUKE , GRILLI FRANCESCO , WILLENEGGER SERGE
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.
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37.发明专利
公开(公告)号：AU8850901A
公开(公告)日：2002-03-22
申请号：AU8850901
申请日：2001-08-28
Applicant: QUALCOMM INC
Inventor： LIN JEREMY H , AGRAWAL AVNEESH , TERASAWA DAISUKE
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.
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公开(公告)号：HK1038451A1
公开(公告)日：2002-03-15
申请号：HK01109179
申请日：2001-12-28
Applicant: QUALCOMM INC
Inventor： LUNDBY STEIN A , TIEDEMANN EDWARD G JR , HOLTZMAN JACK M , TERASAWA DAISUKE
IPC: H04B1/707 , H04B1/7097 , H04B7/005 , H04B , H04L
Abstract: A method for limiting peak transmit power in a CDMA communication system by transmitting a first communication signal having a first high transmit power region, and transmitting a second communication signal having a second high transmit power region. A first and a second communication signal are time offset to prevent the first and second high transmit power regions from occurring simultaneously. Time shifting only a portion of the first and second communication signals is also taught. The first and second communication signals can also include respective first and second low transmit power regions. The time offset can be selected to align one of the first and second high transmit power regions with one of the first and second low transmit power regions. The total transmit power signal can be determined and the time offset can be selected to minimize a peak level of the total transmit power signal. The communication signals are separated into a plurality of portions and portions of the first and second communication signals are time offset to re-order the sequence of transmission of the plurality of portions.
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公开(公告)号：AU6329801A
公开(公告)日：2001-12-03
申请号：AU6329801
申请日：2001-05-18
Applicant: QUALCOMM INC
Inventor： TERASAWA DAISUKE , GRILLI FRANCESCO , WILLENEGGER SERGE
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.
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公开(公告)号：NO20010828L
公开(公告)日：2001-03-29
申请号：NO20010828
申请日：2001-02-19
Applicant: QUALCOMM INC
Inventor： LUNDBY STEIN A , HOLTZMAN JACK M , TIEDEMANN JR EDWARD G , TERASAWA DAISUKE
IPC: H04B1/707 , H04B1/7097 , H04B7/005 , H04L27/26
Abstract: A method for limiting peak transmit power in a CDMA communication system by transmitting a first communication signal having a first high transmit power region, and transmitting a second communication signal having a second high transmit power region. A first and a second communication signal are time offset to prevent the first and second high transmit power regions from occurring simultaneously. Time shifting only a portion of the first and second communication signals is also taught. The first and second communication signals can also include respective first and second low transmit power regions. The time offset can be selected to align one of the first and second high transmit power regions with one of the first and second low transmit power regions. The total transmit power signal can be determined and the time offset can be selected to minimize a peak level of the total transmit power signal. The communication signals are separated into a plurality of portions and portions of the first and second communication signals are time offset to re-order the sequence of transmission of the plurality of portions.
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