中文摘要：

在航天和卫星通信领域的CCSDS，DVB等多个标准中，都采用PSK和QAM调制方式，此外PSK和QAM调制也在其他商用标准中予以采用，因而通用PSK和QAM解调接收机的研究是十分必要的．本文基于通用的正交解调结构，根据模块共用和参数通用的设计原则，提出一种数据率可变的通用PSK和QAM解调接收机．接收机PSK解调的载波恢复采用Costas环，QAM解调的载波恢复采用减星座的Costas环，而PSK和QAM解调的定时恢复采用Gardner算法．解调性能的仿真结果表明：与理论值相比，BPSK、QPSK的解调性能恶化在1dB以内，16QAM的性能恶化在2dB以内，通用接收机可以较好地实现PSK和QAM解调．

英文摘要：

The paper proposes a variable data-rate receiver on universal PSK （phase shift keying） and QAM （quadrature amplitude modulation） receiver by based on general quadrature architecture, and ac- cording to design principle of module sharing and same parameter. In universal receiver, PSK demodula- tions achieve carrier recovery by Costas loop, and QAM demodulations achieve carrier recovery by constel- lation-reduced Costas loop. PSK and QAM demodulations achieve timing-recovery by Gardner algorithm. The simulation results of demodulation performance show that. the demodulation performance degrades in 1 dB for BPSK and QPSK, and 2 dB for 16QAM, compared with theoretical values. It is obvious that the universal receiver preferably fulfils PSK and QAM demodulations.