本文以军用卫星码分多址通信和保密通信为例,研究扩展频谱通信对码序类型、长度和比特速率的要求,根据该两类系统性能,说明序列选择的基本原则,同时给出选择序列长度和比特速率的一般公式。对Gold序列和Kasami序列以及M序列和前馈序列也作了比较分析。 This paper takes military satellite code division multiple access communication and secure communication as an example to study the requirements of code sequence type, length and bit rate in spread spectrum communication. According to these two types of system performance, the basic principle of sequence selection is described. At the same time, The general formula for length and bitrate. The Gold and Kasami sequences as well as the M and feedforward sequences are also compared.