Digital signal processing (DSP) is a new discipline that involves many disciplines and is widely used in many fields. Since the 1960s, with the rapid development of computer and information technology, digital signal processing technology came into being and developed rapidly. In the past two decades, digital signal processing has been widely used in communication and other fields. Digital signal processing is to use computers or special processing equipment to collect, transform, filter, estimate, enhance, compress, recognize and other processing of signals in digital form, so as to obtain the signal form that meets people's needs.