In recent years, the phase-shift keying is widely used in satellite communication, mobile communication and so on. BPSK. QPSK and OQPSK are basic types of phase-shift keying .To help the beginners to distinguish and understand these three modulation systems, this article introduced the modulation and demodulation principles of BPSK, QPSK and OQPSK, as well as the design of system simulation based on System View, would also given by this thesis. It makes phase-shift keying and the comparison and analysis of these three modulation systems...
