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Multi-phase shift keying signal is a class of linear digital modulation signal , due to the power and spectrum efficiency , which is widely used in mobile communications, satellite communications. Since the use of phase modulation technique to transmit information , the general requirements can be accurately estimated carrier phase , which is usually achieved by the PLL , the coherent demodulation. Currently , multi-phase shift keying signal applied more and more multi-phase shift keying signal thus detected is also becoming increasingly important. This paper describes the usefulness of the multi-phase shift keying method of signal acquisition, synchronization and phase demodulation , the computer simulation is still further instructions. Paper introduces the principle of multi-phase shift keying modulation signal , phase-locked loop principle elaborated ; then , introduced the principle of data collection in various parts of the actual circuit and method of synchronization ; Finally, phase demodulation methods , and gives the process and the conclusion of the experiment. In this paper, the method used to prove the strong anti-jamming performance , demodulation speed, high precision demodulate the phase information , the error rate is low. Suitable for practical application .
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