一种简单多径信道下的调制识别方法  

A Modulation Recognition Method under Simple Multipath Channel

作　　者：曾创展 贾鑫 刘淑茜 

机构地区：[1]装备学院研究生管理大队,北京101416 [2]装备学院光电装备系,北京101416 [3]空天宽带网络技术协同创新实验室,北京100094

出　　处：《电讯技术》2015年第11期1266-1271,共6页Telecommunication Engineering

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.

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 

分 类 号：TN911[电子电信—通信与信息系统]