The functions and applications of Signal Processing Worksystem(SPW) ( SPW ), a kind of simulation software for designing digital signal processing and modern communication systems, are discussed. A Binary-Phase Shift Keying ( BPSK ) model is built according to PSK principle. 讨论了数字信号处理和通信系统仿真设计软件SPW的功能、应用,依据PSK通信系统原理,设计出了基于SPW的BPSK系统模型。