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    TRANSMISIONES LOCALES Y DE AREAS AMPLIAS EN UNA RED DE DIFUSION INALAMBRICA.
    41.
    发明专利
    TRANSMISIONES LOCALES Y DE AREAS AMPLIAS EN UNA RED DE DIFUSION INALAMBRICA. 未知

    公开(公告)号：AR046341A1

    公开(公告)日：2005-12-07

    申请号：ARP040103880

    申请日：2004-10-25

    Applicant: QUALCOMM INC

    Inventor： MURALI RAMASWAMY ,  LING FUYUN ,  VIJAYAN RAJIV ,  WALLER KENT G ,  MANTRAVADI ASHOK

    IPC: H04L12/18 ,  H04L12/56 ,  H04H1/00

    Abstract: Para difundir diferentes tipos de transmisión que tienen diferentes hileras de cobertura en una red de difusión inalámbrica, cada estación de base procesa los datos para una transmisión de área de acuerdo con un primer modo (o esquema de codificación y modulación) para generar los símbolos de datos para una transmisión de área amplia, y para procesar los datos para una transmisión local de acuerdo con un segundo modo para generar los símbolos de datos para la transmisión local. Los modos primero y segundo se seleccionan sobre la base de una cobertura deseada para las transmisiones de área amplia y locales, respectivamente. La estación de base también genera pilotos e información de encabezamiento para las transmisiones de área local y de área amplia. Los datos, pilotos, e información de encabezamiento para las transmisiones de área amplia y local se efectúan en multiplexión hacia sus recorridos de transmisión, los que pueden ser diferentes conjuntos de sub-bandas de frecuencia, diferentes segmentos de tiempo o diferentes grupos de sub-bandas en diferentes segmentos de tiempo. Es posible también efectuar la multiplexión y la difusión de más de dos tipos diferentes de transmisión.

    42.
    发明专利
    未知

    公开(公告)号：AT305198T

    公开(公告)日：2005-10-15

    申请号：AT00930554

    申请日：2000-05-10

    Applicant: QUALCOMM INC

    Inventor： LING FUYUN

    IPC: H04B1/7085 ,  H04B1/7115 ,  H04B7/005 ,  H04L25/02 ,  H04Q7/38 ,  H04B1/707

    Abstract: Apparatus for a transmitter and a receiver which enhance the performance of a system coherent demodulation by utilizing non-pilot sub-channels to enhance the accuracy of estimates of amplitude and phase noise inherent in the transmission channel is described. This enhancement is accomplished by utilizing the corrected received data on a fundamental channel to enhance a pilot channel estimate, which is subsequently utilized by a dot product module in demodulating a supplementary data channel.

    SYSTEMS AND METHODS FOR FREQUENCY ACQUISITION IN A WIRELESS COMMUNICATION NETWORK
    43.
    发明专利
    SYSTEMS AND METHODS FOR FREQUENCY ACQUISITION IN A WIRELESS COMMUNICATION NETWORK 未知

    公开(公告)号：CA2554406A1

    公开(公告)日：2005-08-11

    申请号：CA2554406

    申请日：2005-01-24

    Applicant: QUALCOMM INC

    Inventor： GUPTA ALOK K ,  LING FUYUN

    IPC: H04L27/26 ,  H04L27/06

    Abstract: The disclosed embodiments provide for methods and systems for initial frequency acquisition in a wireless communication network. In one aspect, a method for initial frequency acquisition includes the acts of receiving a stream of input samples from a transmitter, determining an estimate for a frequency offset associated with the transmitter and the receiver based on t he received input samples, and compensating for the frequency offset to achieve an initial frequency acquisition.

    DEMULTIPLEXER FOR CHANNEL INTERLEAVING
    44.
    发明专利
    DEMULTIPLEXER FOR CHANNEL INTERLEAVING 未知

    公开(公告)号：HK1068742A1

    公开(公告)日：2005-04-29

    申请号：HK05100876

    申请日：2002-04-25

    Applicant: QUALCOMM INC

    Inventor： LING FUYUN ,  ODENWALDER JOSEPH P

    IPC: H03M13/27 ,  H04B7/06 ,  H04B7/26 ,  H04B14/04 ,  H04L20090101 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L27/26

    Abstract: A demultiplexer (402) for channel interleaving in communications systems with multiple carriers and/or transmitter diversity includes a distribution module (700) that distributes data bits in succession to successive transmitter antennas, and a switching module coupled to the distribution module. The distribution module (700) routes one data bit to each antenna such that no data bit is routed to the same antenna as the previous data bit. The switching module controls the distribution module (700) to skip an antenna in the routing process once each time a predefined number of data bits has been routed. Alternatively, the switching module may control the distribution module to repeat an antenna in the routing process once each time a predefined number of data bits has been routed. The transmitter antennas may, in the alternative, be different carrier frequency bands.

    47.
    发明专利
    未知

    公开(公告)号：BR0109214A

    公开(公告)日：2004-02-10

    申请号：BR0109214

    申请日：2001-03-15

    Applicant: QUALCOMM INC

    Inventor： LING FUYUN

    IPC: H03M13/29 ,  H03M13/45 ,  H04B1/10 ,  H04L1/00 ,  H04L25/03

    Abstract: A method of communications channel coding gain optimization using combined ISI cancellation and turbo decoding is provided. Log-likelihood ratio probabilities with extrinsic values are computed from previous iterations of turbo decoding and used to compute the soft-decision values of channel symbols. The soft-decision values are then used to perform intersymbol interference cancellation and generate refined channel log-likelihood ratio probabilities for the next iteration of turbo decoding.

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