我建议你先读读 Lathi 写的《Signal Processing and Linear Systems》（非常棒的书，我上课用过），这样能对信号处理有一些基本了解。等搞懂了滤波器和频域分析之后，你就能提出更具体的问题了……
I would suggest you start with reading "Signal Processing and Linear Systems" by Lathi (great book, had it on a course) so that you gain some understanding on signal processing. After understanding filters, and frequency analysis, you will be able to ask more specific questions…
+1 好书。不过有时候讲得有点语焉不详（handwavey），数学推导也稍微弱了点。老实说，我觉得最好搭配一本好的信号与系统教材来补充。我喜欢 Lathi 的《Signal Processing and Linear Systems》以及 Proakis 的《Digital Signal Processing : principles, algorithms and applications》。
+1 Great book. Although it can be a bit handwavey and a bit light on the math. Honestly I think it's best supplemented with a good signals and systems text. I like "Signal Processing and Linear Systems" by Lathi and "Digital Signal Processing : principles, algorithms and applications" by Proakis.
就在今天，我重温了一本以前的教科书（Lathi 的《Signal Processing and Linear Systems》），领悟到了第一次读时遗漏的一些关于傅里叶分析的关键要点。一本精心编写的好教科书在背景铺垫、循序渐进的安排以及阐述方式上都是花了苦功做取舍的，……
Just today, I went back to one of my old textbooks (Lathi's Signal Processing and Linear Systems) and came out with some really important points about Fourier analysis that I'd missed the first time around. A good, carefully written textbook makes hard choices about context, sequence, presentation,…
我建议你先读读 Lathi 写的《Signal Processing and Linear Systems》（非常棒的书，我上课用过），这样能对信号处理有一些基本了解。等搞懂了滤波器和频域分析之后，你就能提出更具体的问题了……
I would suggest you start with reading "Signal Processing and Linear Systems" by Lathi (great book, had it on a course) so that you gain some understanding on signal processing. After understanding filters, and frequency analysis, you will be able to ask more specific questions…
+1 好书。不过有时候讲得有点语焉不详（handwavey），数学推导也稍微弱了点。老实说，我觉得最好搭配一本好的信号与系统教材来补充。我喜欢 Lathi 的《Signal Processing and Linear Systems》以及 Proakis 的《Digital Signal Processing : principles, algorithms and applications》。
+1 Great book. Although it can be a bit handwavey and a bit light on the math. Honestly I think it's best supplemented with a good signals and systems text. I like "Signal Processing and Linear Systems" by Lathi and "Digital Signal Processing : principles, algorithms and applications" by Proakis.
就在今天，我重温了一本以前的教科书（Lathi 的《Signal Processing and Linear Systems》），领悟到了第一次读时遗漏的一些关于傅里叶分析的关键要点。一本精心编写的好教科书在背景铺垫、循序渐进的安排以及阐述方式上都是花了苦功做取舍的，……
Just today, I went back to one of my old textbooks (Lathi's Signal Processing and Linear Systems) and came out with some really important points about Fourier analysis that I'd missed the first time around. A good, carefully written textbook makes hard choices about context, sequence, presentation,…