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公开(公告)号：MY146305A
公开(公告)日：2012-07-31
申请号：MYPI20052546
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： AVNEESH AGRAWAL , MALLADI DURGA P , ANASTASIOS STAMOULIS , ASHOK MANTRAVADI , RAMASWAMY MURALI
Abstract: TECHNIQUES TO TRIMSMIT DATA WITH CYCLIC DELAY DIVERSITY AND PILOT STAGGERING ARE DESCRIBED. FOR CYCLIC DELAY DIVERSITY, OFDM SYMBOLS HAVING DIFFERENT CYCLIC DELAY DURATIONS ARE GENERATED. THE CYCLIC DELAY DURATIONS FOR THE OFDM SYMBOLS MAY BE SELECTED TO BE TIME VARYING WITH RESPECT TO THE CYCLIC DELAY DURATIONS FOR OFDM SYMBOLS TRANSMITTED BY A NEIGHBORING BASE STATION (110). AN FDM PILOT IS GENERATED AND MULTIPLEXED ON MULTIPLE SETS OF SUBBANDS IN DIFFERENT SYMBOL PERIODS. WAVEFORMS FOR A SECOND RADIO TECHNOLOGY (E.G., W-CDMA) MAY BE GENERATED FOR DATA TO BE TRANSMITTED WITH THIS RADIO TECHNOLOGY. THE OFDM SYMBOLS ARE MULTIPLEXED ONTO TIME SLOTS USED FOR OFDM, AND THE WAVEFORMS FOR THE SECOND RADIO TECHNOLOGY ARE MULTIPLEXED ONTO TIME SLOTS USED FOR THIS RADIO TECHNOLOGY. ONE OR MULTIPLE MODULATED SIGNALS MAY BE GENERATED BASED ON THE MULTIPLEXED OFDM SYMBOLS AND WAVEFORMS. EACH MODULATED SIGNAL IS TRANSMITTED FROM A RESPECTIVE ANTENNA.
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公开(公告)号：MY145506A
公开(公告)日：2012-02-29
申请号：MYPI20052551
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： AVNEESH AGRAWAL , MALLADI DURGA P , ANASTASIOS STAMOULIS , ASHOK MANTRAVADI , RAMASWAMY MURALI
Abstract: TO TRANSMIT OVERHEAD INFORMATION FOR BROADCAST AND MULTICAST SERVICES IN A SYSTEM THAT UTILIZES MULTIPLE RADIO TECHNOLOGIES, TIME SLOTS USED FOR OFDM IN A SUPER- FRAME ARE INITIALLY ASCERTAINED. OVERHEAD INSORMATION FOR MULTIPLE STREAMS TO BE SENT IN THE TIME SLOTS USED FOR OFDM IS GENERATED. THE OVERHEAD INFORMATION CONVEYS THE TIME SLOTS AND THE CODING AND MODULATION USED FOR THE STREAMS AND MAY BE GIVEN IN VARIOUS FORMS. MULTIPLE RECORDS MAY BE FORMED FOR THE OVERHEAD INFORMATION FOR THE STREAMS. THE OVERHEAD INFORMATION FOR THE STREAMS IS PROCESSED AND TIME DIVISION MULTIPLEXED WITH THE DATA FOR THE STREAMS IN THE SUPER-FRAME. INFORMATION INDICATING THE TIME SLOTS USED FOR OFDM IN THE SUPER-FRAME MAY BE SENT SEPARATELY OR INCLUDED IN THE OVERHEAD INFORMATION. AN INDICATOR MAY ALSO BE APPENDED TO EACH STREAM TO INDICATE WHETHER THERE IS ANY CHANGE IN THE OVERHEAD INFORMATION FOR THE STREAM IN THE NEXT SUPER-FRAME.
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公开(公告)号：ZA200701275B
公开(公告)日：2009-09-30
申请号：ZA200701275
申请日：2007-02-13
Applicant: QUALCOMM INC
Inventor： MAO WANG MICHAEL , RAMASWAMY MURALI , FUYUN LING , RAJIV VIJAYAN
IPC: H04L20090101
Abstract: A method for improving frequency diversity in an OFDM system using interleaved interlaces for constellation symbol interleaving comprises interleaving a number of subcarriers of an interlace in a bit reversal fashion and interleaving a number of interlaces in the bit reversal fashion.
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公开(公告)号：BRPI0511736B1
公开(公告)日：2021-05-11
申请号：BRPI0511736
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： ANASTASIOS STAMOULIS , ASHOK MANTRAVADI , AVNEESH AGRAWAL , DURGA P MALLADI , RAMASWAMY MURALI
Abstract: sistema de comunicação sem fio com comprimento de prefixo cíclico configurável. para transmitir dados de maneira a atenuar os efeitos prejudiciais do espalhamento por retardo, são inicialmente determinadas as áreas de cobertura esperadas para várias transmissões a serem enviadas em várias partições de tempo. comprimentos de prefixo cíclico para estas transmissões são selecionados com base nas áreas de cobertura esperadas. o comprimento de prefixo cíclico para cada transmissão pode ser selecionado dentre um conjunto de comprimentos de prefixo cíclico permitidos com base na área de cobertura esperada para essa transmissão, no escalonamento de pilotos utilizado para a transmissão e assim por diante. por exemplo, um comprimento de prefixo cíclico menor pode ser selecionado para cada transmissão local, e um comprimento de prefixo cíclico maior pode ser selecionado para cada transmissão de área ampla. os comprimentos de prefixo cíclico selecionados podem ser sinalizados para os terminais. as transmissões são processadas (moduladas pela ofdm, por exemplo) com base nos comprimentos de prefixo cíclico selecionados. os comprimentos de prefixo cíclico podem ser selecionados periodicamente, como, por exemplo, em cada super-quadro.
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公开(公告)号：MY146700A
公开(公告)日：2012-09-14
申请号：MYPI20052550
申请日：2005-06-03
Applicant: QUALCOMM INC
Inventor： AVNEESH AGRAWAL , MALLADI DURGA P , ANASTASIOS STAMOULIS , ASHOK MANTRAVADI , RAMASWAMY MURALI
Abstract: TO TRANSMIT DATA IN A MANNER TO MITIGATE THE DELETERIOUS EFFECTS OF DELAY SPREAD, THE EXPECTED COVERAGE AREAS (102A, 102B, 102C, 102D) FOR MULTIPLE TRANSMISSIONS TO BE SENT IN MULTIPLE TIME SLOTS ARE INITIALLY DETERMINED. CYCLIC PREFIX LENGTHS FOR THESE TRANSMISSIONS ARE SELECTED BASED ON THE EXPECTED COVERAGE AREAS. THE CYCLIC PREFIX LENGTH FOR EACH TRANSMISSION MAY BE SELECTED FROM AMONG A SET OF ALLOWED CYCLIC PREFIX LENGTHS BASED ON THE EXPECTED COVERAGE AREA FOR THAT TRANSMISSION, THE PILOT STAGGERING USED FOR THE TRANSMISSION, AND SO ON. FOR EXAMPLE, A SHORTER CYCLIC PREFIX LENGTH MAY BE SELECTED FOR EACH LOCAL TRANSMISSION, AND A LONGER CYCLIC PREFIX LENGTH MAY BE SELECTED FOR EACH WIDE-AREA TRANSMISSION. THE SELECTED CYCLIC PREFIX LENGTHS MAY BE SIGNALED TO THE TERMINALS (120). THE TRANSMISSIONS ARE PROCESSED (E.G., OFDM MODULATED) BASED ON THE SELECTED CYCLIC PREFIX LENGTHS. THE CYCLIC PREFIX LENGTHS MAY BE SELECTED PERIODICALLY, E.G., IN EACH SUPER-FRAME.
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Patent Agency Ranking
公开(公告)号：MX2010002051A
公开(公告)日：2010-03-25
申请号：MX2010002051
申请日：2008-10-31
Applicant: QUALCOMM INC
Inventor： KRISHNAMOORTHI RAGHURAMAN , MANTRAVADI ASHOK , LING FUYUNG , RAMASWAMY MURALI
IPC: H04L5/00
Abstract: Se describen técnicas para multiplexar y transmitir múltiples corrientes de datos. La transmisión de las múltiples corrientes de datos se presenta en "súper-tramas". Cada súper-trama tiene una duración predeterminada y se divide en múltiples (por ejemplo, cuatro) tramas. Cada bloque de datos para cada corriente de datos se codifica externamente para generar un bloque de códigos correspondiente. Cada bloque de códigos se divide en múltiples sub-bloques, y cada paquete de datos en cada bloque de códigos se codifica internamente y se modula para generar símbolos de modulación del paquete. Los múltiples sub-bloques para cada bloque de códigos se transmiten en las múltiples tramas de la misma súper-trama, un sub-bloque por trama. Cada corriente de datos se le asigna un número de unidades de transmisión en cada súper-trama y se asignan unidades de transmisión específicas hasta alcanzar un empacado eficiente. Un dispositivo inalámbrico puede seleccionar y recibir corrientes de datos individuales.
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公开(公告)号：MY139873A
公开(公告)日：2009-11-30
申请号：MYPI20044339
申请日：2004-10-21
Applicant: QUALCOMM INC
Inventor： RAMASWAMY MURALI , FUYUN LING , RAJIV VIJAYAN , WALKER KENT G , ASHOK MANTRAVADI
Abstract: TO BROADCAST DIFFERENT TYPES OF TRANSMISSION HAVING DIFFERENT TIERS OF COVERAGE IN A WIRELESS BROADCAST NETWORK, EACH BASE STATION PROCESSES DATA FOR A WIDE-AREA TRANSMISSION IN ACCORDANCE WITH A FIRST MODE (OR CODING AND MODULATION SCHEME) TO GENERATE DATA SYMBOLS FOR THE WIDE-AREA TRANSMISSION AND PROCESSES DATA FOR A LOCALTRANSMISSION IN ACCORDANCE WITH A SECOND MODE TO GENERATE DATA SYMBOLS FOR THE LOCAL TRANSMISSION. THE FIRST AND SECOND MODES ARE SELECTED BASED ON THE DESIRED COVERAGE FOR WIDE-AREA AND LOCAL TRANSMISSIONS, RESPECTIVELY. THE BASE STATION ALSO GENERATES PILOTS AND OVERHEAD INFORMATION FOR LOCAL AND WIDE-AREA TRANSMISSIONS. THE DATA, PILOTS AND OVERHEAD INFORMATION FOR LOCAL AND WIDE-AREA TRANSMISSIONS ARE MULTIPLEXED ONTO THEIR TRANSMISSION SPANS, WHICH MAY BE DIFFERENT SETS OF FREQUENCY SUBBANDS, DIFFERENT TIME SEGMENTS, OR DIFFERENT GROUPS OF SUBBANDS IN DIFFERENT TIME SEGMENTS. MORE THAN TWO DIFFERENT TYPES OF TRANSMISSION MAY ALSO BE MULTIPLEXED AND BROADCAST.
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公开(公告)号：AU2011253578A1
公开(公告)日：2011-12-15
申请号：AU2011253578
申请日：2011-11-22
Applicant: QUALCOMM INC
Inventor： PRASAD MALLADI DURGA , AVNEESH AGRAWAL , RAMASWAMY MURALI , ASHOK MANTRAVADI , ANASTASIOS STAMOULIS
Abstract: Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic 5 delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the 10 waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna. Start 800 Generate OFDM symbols having different cyclic delay durations Generate and multiplex an FDM pilot on multiple sets of subbands in different symbol periods Generate W-CDMA waveforms for data to be transmitted with W-CDMA Multiplex the OFDM symbols onto time slots used for OFDM Multiplex the W-CDMA waveforms onto time slots used for W-CDMA Generate one or multiple modulated signals based on the multiplexed OFDM symbols and W-CDMA waveforms '824 Transmit each modulated signal from a respective antenna End
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公开(公告)号：AU2011253562A1
公开(公告)日：2011-12-15
申请号：AU2011253562
申请日：2011-11-22
Applicant: QUALCOMM INC
Inventor： PRASAD MALLADI DURGA , AVNEESH AGRAWAL , RAMASWAMY MURALI , ASHOK MANTRAVADI , ANASTASIOS STAMOULIS
Abstract: Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic 5 delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g.. W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM. and the 10 waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna. Start 800 Generate OFDM symbols having different cyclic delay durations ' 814 Generate and multiplex an FDM pilot on multiple sets of subbands in different symbol periods Generate W-CDMA waveforms for data to be transmitted with W-CDMA "818 Multiplex the OFDM symbols onto time slots used for OFDM ,820 Multiplex the W-CDMA waveforms onto time slots used for W-CDMA Generate one or multiple modulated signals based on the multiplexed OFDM symbols and W-CDMA waveforms t824 Transmit each modulated signal from a respective antenna End
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公开(公告)号：ZA200701274B
公开(公告)日：2008-12-31
申请号：ZA200701274
申请日：2007-02-13
Applicant: QUALCOMM INC
Inventor： WANG MICHAEL MAO , RAMASWAMY MURALI , FUYUN LING , RAJIV VIJAYAN
IPC: H04L20090101
Abstract: A method for improving frequency diversity in an OFDM system using interleaved interlaces for constellation symbol interleaving comprises interleaving a number of subcarriers of an interlace in a bit reversal fashion and interleaving a number of interlaces in the bit reversal fashion.
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