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    ITERATIVE FAST FOURIER TRANSFORM ERROR CORRECTION
    1.
    发明公开
    ITERATIVE FAST FOURIER TRANSFORM ERROR CORRECTION 审中-公开
    迭代纠错快速傅立叶变换

    公开(公告)号：EP1374053A4

    公开(公告)日：2005-11-02

    申请号：EP02733947

    申请日：2002-04-05

    Applicant: INTERDIGITAL TECH CORP

    Inventor： JUNG-LIN PAN ,  ARIELA ZEIRA

    IPC: H03M13/31 ,  H04B1/7105 ,  G06F11/00

    CPC classification number: H04B1/71052 ,  H04B1/7105 ,  H04B2201/70707

    Abstract: Data is to be estimated from a received plurality of data signals in a code division multiple access communication system. The data signals are transmitted in a shared spectrum at substantially a same time. A combined signal of the transmitted data signals are received over the shared spectrum (42) and sampled (43). A channel response for the transmitted data signals is estimated. Data of the data signals is estimated (44) using the samples and the estimated channel response. The data estimation uses a fourier transform based data estimating approach. An error in the data estimation introduced from a circulant approximation used in the fourier transform based approach is iteratively reduced.

    ITERATIVE FAST FOURIER TRANSFORM ERROR CORRECTION
    2.
    发明专利
    ITERATIVE FAST FOURIER TRANSFORM ERROR CORRECTION 未知

    公开(公告)号：MY133254A

    公开(公告)日：2007-10-31

    申请号：MYPI20021229

    申请日：2002-04-05

    Applicant: INTERDIGITAL TECH CORP

    Inventor： JUNG-LIN PAN ,  ARIELA ZEIRA

    IPC: G06F11/00 ,  H03M13/31 ,  H04B1/7105

    Abstract: DATA IS TO ESTIMATED FROM A RECEIVED (28) PLURALITY OF DATA SIGNALS IN A CODE DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM. THE DATA SIGNALS ARE TRANSMITTED (26) IN A SHARED SPECTURUM AT SUBSTANTIALLY A SAME TIME. A COMBINED SIGNAL OF THE TRANSMITTED (26) DATA SIGNALS ARE RECEIVED OVER THE SHARED SPECTRUM AND SAMPLED (43). A CHANNEL RESPONSE FOR THE TRANSMITTED DATA SIGNALS IS ESTIMATED. DATA OF THE DATA SIGNALS IS ESTIMATED USING THE SAMPLES (43) AND THE ESTIMATED CHANNEL RESPONSE (44). THE DATA ESTIMATION (46) USES A FOURIER TRANSFORM BASED DATA ESTIMATING APPROACH. AN ARROR IN THE DATA ESTIMATION (46) INTRODUCED FROM A CIRCULAT APPROXIMATION USED IN THE FOURIER TRANSFORM BASED APPROACH IS ITERATIVELY REDUCED.(FIG. 2)

    Method for accessing an uplink random access channel in SC-FDMA systems
    4.
    发明专利
    Method for accessing an uplink random access channel in SC-FDMA systems 未知

    公开(公告)号：AU2006283513B2

    公开(公告)日：2011-07-07

    申请号：AU2006283513

    申请日：2006-08-22

    Applicant: INTERDIGITAL TECH CORP

    Inventor： JUNG-LIN PAN ,  GUODONG ZHANG ,  TSAI ALLAN Y

    IPC: H04J1/00

    Abstract: A method and apparatus for accessing a contention-based uplink random access channel (RACH) in a single carrier frequency division multiple access (SC-FDMA) system are disclosed. A wireless transmit/receive unit (WTRU) randomly selects a RACH subchannel and a signature among a plurality of available RACH subchannels and signatures. The WTRU transmits a preamble using the selected signature via the selected RACH subchannel at a predetermined or computed transmission power. A base station monitors the RACH to detect the preamble and sends an acquisition indicator (AI) to the WTRU when a signature is detected on the RACH. When receiving a positive acknowledgement, the WTRU sends a message part to the base station. If receiving a negative acknowledgement or no response, the WTRU retransmits the preamble.

    8.
    发明专利
    未知

    公开(公告)号：NO20034400D0

    公开(公告)日：2003-10-01

    申请号：NO20034400

    申请日：2003-10-01

    Applicant: INTERDIGITAL TECH CORP

    Inventor： JUNG-LIN PAN ,  ZEIRA ARIELA

    IPC: H03M13/31 ,  H04B1/7105 ,  G06F

    Abstract: Data is to be estimated from a received plurality of data signals in a code division multiple access communication system. The data signals are transmitted in a shared spectrum at substantially a same time. A combined signal of the transmitted data signals are received over the shared spectrum and sampled. A channel response for the transmitted data signals is estimated. Data of the data signals is estimated using the samples and the estimated channel response. The data estimation uses a Fourier Transform based data estimating approach. An error in the data estimation introduced from a circulant approximation used in the Fourier Transform based approach is iteratively reduced.

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