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    • 3. 发明申请
    • 一种信道估计方法
    • WO2008113216A1
    • 2008-09-25
    • PCT/CN2007/000916
    • 2007-03-21
    • 中兴通讯股份有限公司许国平辛雨吴交
    • 许国平辛雨吴交
    • H04L25/02
    • H04L25/0212H04L25/0242H04L27/2601
    • A channel estimation method comprises the steps: a pseudo-random sequence carrying with a cycle prefix whose length is L C is inserted in the signal data segment sent by the transmission end as a training sequence every a signal data segment having a special length, L C is larger than L-1, wherein L is the maximum delay of the discrete channel model of the current channel, the length of the pseudo-random sequence not carrying with the cycle prefix is L P ; the receiving end receives the data of the training sequence, the cross-correlation matrix C is obtained by making cross-correlation using the received data after deleted the cycle prefix portion and the L C shifted pseudo-random sequences, the shifted pseudo-random sequence is obtained by circularly right shifting the pseudo-random sequence as current training sequence 0, 1, ¼, L C -1 times respectively; the estimation of the current channel impulse response is the product of the inverse matrix of C P and matrix C, wherein C P is a L C order phalanx and is the auto-correlation matrix of the pseudo-random sequence which is obtained by circularly right shifting the pseudo-random sequence as current training sequence 0, 1, ¼, L C -1 times respectively.