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    • 4. 发明申请
    • NOISE WHITENING
    • NOISE白色
    • WO2004008705A1
    • 2004-01-22
    • PCT/EP2003/005880
    • 2003-06-04
    • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)HE, Shousheng
    • HE, Shousheng
    • H04L25/03
    • H04L25/03006H04L25/03012
    • A method of noise whitening a received signal comprises estimating (201) the noise of a channel; calculating (202) the power spectrum of the channel; adding (203) the estimated noise and the calculated power spectrum to build (204) a positive definite band matrix; applying (205) symmetric factorisation to the matrix; deriving (206) the spectral factorisation of the channel from the symmetric factorisation; approximating (207) the spectral factorisation; calculating (208) the noise whitening prefilter settings from the derived spectral factorisation and the estimated noise of the channel; and prefiltering the received signal to noise whiten the signal.
    • 接收信号的噪声白化方法包括估计(201)信道的噪声; 计算(202)频道的功率谱; 添加(203)估计的噪声和计算的功率谱以构建(204)正定带矩阵; 将(205)对称因式分解应用于矩阵; 从对称因子分解导出(206)信道的频谱因子分解; 近似(207)频谱分解; 从导出的频谱分解和信道的估计噪声计算(208)噪声白化预滤波器设置; 并且将接收到的信号预过滤以使信号变白。