利用特征函数识别相位调制信号

由于信号的特征函数含有大量相位信息,因此可以用来识别相位调制信号。文章经过分析发现,同一种信号星座图不同,其特征函数的相位也不同。文中选择信号集{QPSK、8PSK、矩形8QAM、圆形8QAM、矩形16QAM、星形16QAM}来举例说明利用特征函数识别相位调制信号的可行性。仿真证明当信噪比为5dB,码元个数为400个时识别率达到90%以上。

Recognition of Phase Modulation Signals Based on Characteristic Function

Based on the phase information of the received signals' characteristic functions.The phase modulation signals can be recognized.After analysis,different constellation has different phase of character function.Using computer simulation, recognition of the QPSK,8PSK,rectangular 8QAM,circular 8QSK,rectangular 16QAM,starlike 16QAM signals is efficient.The simulation shows that when the SNR reaches 5dB,and the number of signals is 400,the successful rates are more than 90%.