说明：  这是吴仁彪老师翻译的现代信号谱分析这本书。书中介绍了传统功率谱估计与现代信号谱估计。尤其其中的线谱估计，更是能实现角度测量。
(This is the book of modern signal spectrum analysis translated by Mr. Wu renbiao. The book introduces the traditional power spectrum estimation and modern signal spectrum estimation. Especially the line spectrum estimation can realize the angle measurement.)