Analysis and Simulation of 2ASK Digital Band-pass Transmission System Basing on SIMULINK

Digital modulation and demodulation system as an important part of digital communication system, its research is necessary. Based on the analysis of 2ASK digital band-pass system transmission characteristics, SIMULINK software is used to simulate the digital band-pass transmission system. Having been fully considered the possible factors affecting the 2ASK signal in the transmission process, a basic model of 2ASK digital band-pass transmission system is established, a system model which can simulate and realize the function of 2ASK digital band-pass signal transmission. Debugging and testing show that the waveforms of the system are consistent with the theoretical analysis and error-free code transmission can be achieved; the symbol error rate is rising with the increase of noise, which indicates that the system design is effective and reasonable. It is worth reference for related research and the improvement of such system, and also provides a new way for system design and experimental teaching.