Research On Phase Shift Keying

Transmission with transporting wave about signal is one of the fundamental problems in Communication. It has always been a hot topic since the naissance of modulation about digital signal. Its width and height is bigger than before with the rapid development about digital signal's modulation and demodulation. Multiple phase shift keying has been applied widely because of its realization simplicity and its vigor and healthy on difference demodulation under the Anti-decline condition. On base of the Binary Phase Shift Keying&2 Difference Phase Shift Keying and Multiple Phase Shift, Firstly, have discussed the question about the phase modulation technology: Phase distortion. Secondly, we have extended the method of overcoming the phase distortion. Next, have discussed continuously the heavy code phase modulation technology in this foundation, we may don't worry the error rate increasing by mistake which brings because of the phase revision; Finally, we have carried on the discussion about Difference Phase Shift Keying based on the adaptive filtering modulation principle and it's realization with Least Mean Squares algorithm. We produce the erring code performance with auto-adapted demodulation on Difference Phase Shift Keying through having carried on the computer simulation.