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公开(公告)号：ES2296402T3
公开(公告)日：2008-04-16
申请号：ES99941226
申请日：1999-08-17
Applicant: QUALCOMM INC
Inventor： LUNDBY STEIN A , TIEDEMANN EDWARD G JR , HOLTZMAN JACK M , TERASAWA DAISUKE
IPC: H04B1/707 , H04B1/7097 , H04B7/005 , H04L27/26
Abstract: Un procedimiento para limitar la potencia transmisora pico en un sistema de comunicación de CDMA, comprendiendo el procedimiento las etapas de: transmitir una primera señal (74A) de comunicación con una primera región de alta potencia transmisora, y una primera región de baja potencia transmisora; transmitir una segunda señal (74B) de comunicación con una segunda región de alta potencia transmisora y una segunda región de baja potencia transmisora; y desplazar en el tiempo una entre las señales de comunicación (74A, 74B) primera y segunda, para impedir que ocurran simultáneamente las regiones de alta potencia transmisora primera y segunda, en donde la etapa de desplazamiento en el tiempo está caracterizada por: determinar una pluralidad de desplazamientos temporales para dicha señal entre las señales (74A, 74B) de comunicación primera y segunda; sumar la potencia de las señales (74A, 74B) de comunicación primera y segunda, para determinar una señal de potencia transmisora total en cada unode dicha pluralidad de distintos desplazamientos en el tiempo; seleccionar (106) el desplazamiento en el tiempo correspondiente a la señal de potencia transmisora total con el mínimo nivel máximo; y desplazar en el tiempo dicha señal, entre las señales de comunicación primera y segunda, en dicho desplazamiento (74A, 74B) en el tiempo seleccionado.
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公开(公告)号：DE69937643D1
公开(公告)日：2008-01-10
申请号：DE69937643
申请日：1999-08-17
Applicant: QUALCOMM INC
Inventor： LUNDBY STEIN A , TIEDEMANN EDWARD G , HOLTZMAN JACK M , 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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公开(公告)号：DK1284057T3
公开(公告)日：2007-05-21
申请号：DK01937580
申请日：2001-05-18
Applicant: QUALCOMM INC
Inventor： TERASAWA DAISUKE , WILLENEGGER SERGE , GRILLI FRANCESCO
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：PT1284057E
公开(公告)日：2007-04-30
申请号：PT01937580
申请日：2001-05-18
Applicant: QUALCOMM INC
Inventor： TERASAWA DAISUKE , GRILLI FRANCESCO , WILLENEGGER SERGE
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公开(公告)号：HK1066347A1
公开(公告)日：2005-03-18
申请号：HK04109153
申请日：2004-11-19
Applicant: QUALCOMM INC
Inventor： SHIU DA-SHAN , AGRAWAL AVNEESH , TERASAWA DAISUKE
IPC: H03M20060101 , H03M13/27 , H04B1/707
Abstract: A receiver unit for use in a CDMA system and including a channel processor, a buffer, and a data processor. The channel processor processes samples for one or more physical channels for each time interval to provide symbols. The buffer is operated as a number of memory banks. Each memory bank is associated with a respective time interval and stores symbols associated with that time interval. The data processor retrieves symbols for a particular "traffic" from one or more memory banks and processes the retrieved symbols. For the W-CDMA system, each traffic includes one or more radio frames for a particular transmission time interval. The receiver unit typically further includes a controller that directs the storage and retrieval of symbols to and from the memory banks and a decoder that decodes symbols processed by the data processor. For each time interval, radio frames for physical channels received starting within that time interval can be stored to permutated locations of designated sections of the memory bank. Radio frames associated with a particular CCTrCH can be stored to contiguous sections of the memory bank. Symbols for a particular traffic can be retrieved from one or more memory banks in permutated order.
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Patent Agency Ranking
公开(公告)号：AU767202B2
公开(公告)日：2003-11-06
申请号：AU5491999
申请日：1999-08-17
Applicant: QUALCOMM INC
Inventor： LUNDBY STEIN A , TIEDEMANN EDWARD G JR , HOLTZMAN JACK M , 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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77.发明专利
公开(公告)号：AU2001298085A1
公开(公告)日：2003-09-09
申请号：AU2001298085
申请日：2001-09-05
Applicant: QUALCOMM INC
Inventor： SHIU DA-SHAN , AGRAWAL AVNEESH , TERASAWA DAISUKE
Abstract: Techniques for processing transmissions in a communications (e.g., CDMA) system. Samples are received and assembled into one or more traffics, with each traffic including one or more portions (e.g., radio frames, coded blocks) suitable for processing independently. The priority of each portion is determined based on its processing delays requirement, which can be estimated based on, for example, the time interval over which the samples in the traffic are interleaved, the processing deadline, and so on. A portion in a traffic having the highest priority is selected and scheduled for processing. The processing can include reordering the samples in the selected portion in accordance with a particular reordering scheme, accumulating redundant samples and inserting place holders (e.g., don't cares) for deleted samples in the selected portion, and decoding the reordered samples in the selected portion. The processing of the traffic may be interrupted, in which case the state information related to the processing of the interrupted traffic is saved. A portion in another traffic can then be selected and scheduled for processing. Thereafter, the processing on the interrupted traffic can be resumed using the saved state information.
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公开(公告)号：CA2460957A1
公开(公告)日：2003-03-27
申请号：CA2460957
申请日：2002-09-19
Applicant: QUALCOMM INC
Inventor： TERASAWA DAISUKE , GHO GWANG-HYUN , AGRAWAL AVNEESH , RAO SUBRAMANYA P , VENKATESAN SIVARAMA
IPC: H04B1/7073 , H04B1/7075 , H04B1/7077 , H04B1/7083 , H04B1/709 , H04B1/7093 , H04Q7/38 , H04B1/707 , H04B7/26
Abstract: Techniques for searching in asynchronous systems are disclosed. In one aspec t, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/slot energies are summed to produce code sequence energies, the maximum of which indicates a located code sequence and slot boundary. In another aspect, the correlation is performed by sub-correlating the received signal with a common sequence, and performing a Fast Hadamard Transform (FHT) on the results. In yet another aspect, one sub-correlator can be used to search a plurality of peaks simultaneously. Various other aspects of the invention are also presented. These aspects collectively have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.
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79.发明专利
公开(公告)号：HK1043012A1
公开(公告)日：2002-08-30
申请号：HK02104365
申请日：2002-06-11
Applicant: QUALCOMM INC
Inventor： TIEDEMANN EDWARD G JR , TERASAWA DAISUKE , SARKAR SANDIP , JOU YU-CHEUN , ODENWALDER JOSEPH P , SHANBHAG ABIHIJT , WILLENEGGER SERGE
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.
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公开(公告)号：BR0011414A
公开(公告)日：2002-04-23
申请号：BR0011414
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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