基于循环谱的BPSK信号符号速率盲估计  

Blind Estimation of BPSK Signal Symbol Rate Based on Cyclic Spectrum Density

作　　者：杨蛟龙[1] 陈爱平[1] 张玉峰[1] YANG Jiaolong;CHEN Aiping;ZHANG Yufeng(Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094

出　　处：《电讯技术》2020年第8期951-954,共4页Telecommunication Engineering

摘　　要：在非协作通信中,符号速率估计是信号解调的关键过程。提出了一种基于循环谱分析的二进制相移键控(Binary Phase Shift Keying,BPSK)信号符号速率的盲估计方法,利用BPSK信号在循环频率维度中区别于其他相移键控(Phase Shift Keying,PSK)信号的峰值奇异特征,精确提取BPSK信号的载波频率,之后利用载波频率值估计符号速率。仿真结果表明,在信噪比不低于2 dB时,所提方法估计结果值与理论值完全一致。Symbol rate estimation is an important step in the non-cooperative communication system.This paper proposes a blind estimation method for symbol rate of binary phase shift keying(BPSK)signal based on cyclic spectrum density.The singularity of the peak point in BPSK cyclic frequency dimension,which is much different from other phase shift keying(PSK)signal,is used to calculate its carrier frequency.Then symbol rate can be estimated with the calculated carrier frequency.The simulation results show that the BPSK signal symbol rate can be estimated accurately when signal-to-noise ratio(SNR)is no less than 2 dB by using the proposed method.

关 键 词：非协作通信 BPSK信号 符号速率估计 循环谱(CSD) 

分 类 号：TN927[电子电信—通信与信息系统]