摘要
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 d B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 based on joint feature parameters is put forward for the recogni-tion problem that only a little modulation types can be recognized and the performance is bad when the sig-nal-to-noise ratio( SNR) is low under the simple multipath condition. According to simple multipath with-out 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 grea-ter than 4 dB.
出处
《电讯技术》
北大核心
2015年第11期1266-1271,共6页
Telecommunication Engineering
关键词
调制识别
多径信道
延迟相关
瞬时自相关
高阶累积量
modulation recognition
multipath channel
delay correlation
instantaneous correlation
high order cumulants
