文件名称:arls
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对于信号 ，其中w(n)为均值为0，方差为1的AWGN。n=1,2,…，128。
AR模型功率谱估计。假设AR（4），用LS方法估计AR参数，功率谱用freqz（1，LS_ar,1024,1）来验证。-For the signal, which w (n) is zero mean and variance 1 AWGN. n = 1,2, ..., 128.
AR model power spectrum estimation. Assuming AR (4), with the LS method to estimate AR parameters, power spectrum with freqz (1, LS_ar, 1024,1) to verify.
AR模型功率谱估计。假设AR（4），用LS方法估计AR参数，功率谱用freqz（1，LS_ar,1024,1）来验证。-For the signal, which w (n) is zero mean and variance 1 AWGN. n = 1,2, ..., 128.
AR model power spectrum estimation. Assuming AR (4), with the LS method to estimate AR parameters, power spectrum with freqz (1, LS_ar, 1024,1) to verify.
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arls.m