基于相位编码统计的数字调相信号调制识别

Recognition of MPSK Signals Types Based on Phase Coding Statistics

提出了一种基于相位差分编码统计实现数字调相信号BPSK、QPSK、π/4-QPSK、8PSK信号调制识别的处理方法。通过对信号进行多重相位差分处理,根据得到的结果设计识别所需的编码规则,最终利用编码统计结果对四种数字调相信号进行识别。并对该方法在有频率偏移影响下的识别性能进行研究。计算机仿真表明该方法在信号信噪比不小于7 d B时,信号的识别率达到90%以上。该算法计算量小,易于工程实现,同时具有良好的抗频偏性能。

Based on phase difference coding statistics,an approach for digital phase modulation signal BPSK,QPSK,π /4-QPSK,8PSK modulations recognition is presented. By use of multiple phase difference signal processing,according to the results design the encoding rules which is required for signal recognition,finally by using the statistical results of four types of digital phase modulation signal coding for identification. And the method’s recognition performance under the influence of the frequency offset is studied. The simulation results show that the recognition rate can reach 90% when SNR is not less than 7 d B. This algorithm has less amount of calculation and easy to apply on project,at the same time has frequency drift resistance.