一种简单多径信道下的调制识别方法

为解决简单多径条件下调制识别类型少、难以工作于低信噪比下的问题，提出了一种基于联合特征参数的调制识别方法。根据简单多径下不考虑多普勒效应影响这一条件，利用调制信号的延迟相关和瞬时自相关特性，并结合高阶累积量特征对幅移键控(ASK)、相移键控(PSK)、频移键控(FSK)共8种信号进行分类识别。仿真结果表明，在信噪比大于4 dB时，简单多径条件下的各类调制信号正确识别率接近100%。

A modulation recognition method under simple multipath channel

A modulation recognition method based on joint feature parameters is put forward for the recognition problem that only a little modulation types can be recognized and the performance is bad when the signal-to-noise ratio(SNR) is low under the simple multipath condition. According to simple multipath without considering the Doppler effect,the delay correlation,the instantaneous correlation and the high order cumulants of the signals are used to classify and recognize 8 types of signal of amplitude shift keying(ASK),phase shift keying(PSK) and frequency shift keying(FSK).The simulation results show that the modulation signals can be recognized nearly 100% under the simple multipath condition when SNR is greater than 4 dB.