Simulation for all-digital BPSK modulation and demodulation system

All\|digital processing technology is indispensable in modern communication. All\|digital modulation and demodulation mean that the transmitter and receiver will adopt digital signal processing (DSP) algorithm entirely. So all communication systems may be implemented by DSP chips or VLSI devices. Through the research on all\|digital modulation and demodulation system by computer simulation, we can clearly understand the digital signal processing technology of communication system we use including the implementation of information stream, the transmiting filter and receiving filter, the interpolator, and the slicer, etc. by using digital signal processing algorithm entirely. This paper describes the algorithm and architecture of several modules in the BPSK modulation and demodulation system . The all\|digital BPSK modulation and demodulation system is simulated by applying MATLAB software. It presents various figures of the time field and the frequency field. The design scheme of system simulation takes on actual significance for the hardware implementation of QPSK,16QAM , etc. of all-digital modulation and demodulation systems.