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258 records (took 0.023 seconds)

    21.
    发明专利
    未知

    公开(公告)号：AT434893T

    公开(公告)日：2009-07-15

    申请号：AT06737649

    申请日：2006-03-10

    Applicant: QUALCOMM INC

    Inventor： MANTRAVADI ASHOK ,  VRCELJ BOJAN ,  LING FUYUN ,  MUKKAVILLI KIRAN

    IPC: H04L25/02 ,  H04L27/26

    Abstract: Systems and methods are provided for determining and applying timing corrections in a digital communications system. In an aspect, a timing correction method is provided for a multi-carrier system. This includes aligning two or more symbols with respect to each other from a symbol subset in order to account for timing differences between the symbols. The symbol alignment is first carried out to generate channel estimates for data demodulation. The channel estimates, thus generated, along with the timing alignment information are in turn used for determining timing corrections-to be applied to future symbols.

    22.
    发明专利
    未知

    公开(公告)号：NO326935B1

    公开(公告)日：2009-03-16

    申请号：NO20015489

    申请日：2001-11-09

    Applicant: QUALCOMM INC

    Inventor： LING FUYUN

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

    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.

    Channel monitoring methods in wireless broadcast systems
    23.
    发明专利
    Channel monitoring methods in wireless broadcast systems 未知

    公开(公告)号：AU2008279024A1

    公开(公告)日：2009-01-29

    申请号：AU2008279024

    申请日：2008-07-25

    Applicant: QUALCOMM INC

    Inventor： LING FUYUN ,  LI LINBO ,  KRISHNAMOORTHI RAGHURAMAN ,  MANTRAVADI ASHOK

    IPC: H04W48/16

    Abstract: A wireless communication method is disclosed, comprising measuring a received signal strength indicator (RSSI) for a current radio frequency (RF); determining whether the measured RSSI is above a predetermined threshold value; monitoring neighboring RFs; and detecting the presence of the FLO (forward link only) signal in the neighboring RFs without detecting a time-division multiplexed pliot (TDM1). Also disclosed is a method of monitoring radio frequencies (RFs) at an access terminal in a wireless communication environment to detect a FLO (Forward link only) signal without detecting a time-division multiplexed pliot (TDM1), the method comprising detecting an energy level for a wide-area identity (WID) channel associated with a received signal; comparing the energy level for the WID channel with a predetermined threshold; and detecting a presence of the FLO signal based upon the comparison.

    26.
    发明专利
    未知

    公开(公告)号：DE60132179T2

    公开(公告)日：2008-12-18

    申请号：DE60132179

    申请日：2001-03-15

    Applicant: QUALCOMM INC

    Inventor： LING FUYUN

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

    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.

    27.
    发明专利
    未知

    公开(公告)号：DE60039614D1

    公开(公告)日：2008-09-04

    申请号：DE60039614

    申请日：2000-09-29

    Applicant: QUALCOMM INC

    Inventor： CHEN TAO ,  LING FUYUN ,  HOLTZMAN JACK ,  JOU YU-CHEUN ,  LUNDBY STEIN A

    IPC: H04B7/02 ,  H04J99/00 ,  H01Q1/24 ,  H01Q3/26 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/26

    Abstract: A method and apparatus for wireless communications wherein a base station transmits a signal to sending data to a subscriber station through a signal beam that sweeps through the coverage area of the base station. User data addressed to the subscriber station is buffered until the signal beam angle of the signal beam allows efficient transmission. The base station may alter the beam sweep speed or the shape of the beam's radiation pattern over time to maximize system efficiency and capacity.

    DIVERSIDAD DE CONMUTACION EN SISTEMAS DE DIFUSION DE OFDM BASADO EN MULTIPLES ANTENAS RECEPTORAS
    28.
    发明专利
    DIVERSIDAD DE CONMUTACION EN SISTEMAS DE DIFUSION DE OFDM BASADO EN MULTIPLES ANTENAS RECEPTORAS 未知

    公开(公告)号：AR059115A1

    公开(公告)日：2008-03-12

    申请号：ARP060104242

    申请日：2006-09-27

    Applicant: QUALCOMM INC

    Inventor： LI LINBO ,  MANTRAVADI ASHOK ,  LING FUYUN

    IPC: H04B7/08

    Abstract: Sistemas y métodos para mejorar la calidad de la senal en los receptores de una red inalámbrica. En una forma de realizacion, una antena es seleccionada de un subconjunto de antenas basada en un parámetro de calidad de la senal tal como la energía de la senal recibida o la relacion de senal o ruido (SNR). En otra forma de realizacion, las multiples antenas son aplicadas a las trayectorias independientes del procesamiento de la senal para las antenas respectivas donde la salida de las trayectorias es combinada entonces para mejorar la calidad total de la senal en el receptor

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