这是一本信号处理的英文经典教程。相对国内的信号处理教程来说，讲的更为具体易于理解，如果你学习信号处理时感到很抽象的话，这本书对你很有帮助-This is an English classic signal processing tutorial. Are very abstract when compared to the signal processing tutorial, talking about the more specific is easy to understand, if y