DSP Realization Of General Digital Looper

In this thesis , firstly,we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. We have done some simulations to get the performance of carrier frequency estimation using two modulation modes (16QAM and 4-QPSK),and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage. Secondly, we used the DSP assembly language to perform the carrier phase tracking based on a digital processing system.This system is designed according to the idea of software radio.This digital processing system realized the intermediate frequency digitalization.With the diverse configuration of the digital upconverter and digital downconverter in this system,it can carry through many signal modulation modes.And because the carrier phase tracking is performed using software in DSP, it brings great convenience to this system and makes this system available in many digital communication systems.