求功率谱估计常用的几种方法，包括周期图法，Welch 法，和AR模型法。,For power spectrum estimation commonly used in several ways, including periodogram, Welch law, and the AR model.

lempel-ziv welch 编码 蓝波- 立夫- 卫曲编码法-lempel-ziv welch encoding, image compression

matlab Welch法实现谱估计，基本原理验证-matlab Welch method to achieve spectrum estimation, the basic principles of validation

MATLAB代码经典功率谱估计，Welch法、协方差法、周期图、burg法及其对比，附完整注释(MATLAB code, classical power spectrum estimation, Welch method, covariance method, periodogram, Burg method and their comparison, with complete annotation.)