低信噪比BPSK信号载波频率估计方法
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- 英文论文题名：A method for carrier frequency estimation of BPSK signal in low signal-to-noise ratio
- 论文作者：王晓燕 ; 方世良 ; 王莉
- 英文论文作者：WANG Xiao-yan ; FANG Shi-liang ; WANG Li ; Key Laboratory of Underwater Acoustic Signal Processing of Ministry of Education ; Southeast University
- 年：2016
- 作者机构：东南大学水声信号处理教育部重点实验室;
- 论文关键词：BPSK信号 ; 载频估计
- 英文论文关键词：BPSK signal ; carrier frequency estimation
- 会议召开时间：2016-10-28
- 会议录名称：2016年全国声学学术会议论文集
- 语种：中文
- 分类号：TN911.23
- 学会代码：OGSM
- 会议名称：2016年全国声学学术会议
- 会议地点：中国湖北武汉
- 主办单位：中国声学学会
- 学会名称：中国声学学会
- 页数：3
- 文件大小：343k
- 原文格式：D
- 会议级别：全国
摘要
针对低信噪比条件下BPSK信号载波频率估计问题,提出了基于功率谱最大对称相关系数的载波频率估计方法。该方法充分利用BPSK信号功率谱的对称特性,通过对称相关系数估计与最大值搜索,实现BPSK信号的载频估计。理论分析与仿真结果表明,相较于平方倍频法,该方法信噪比下限降低了10d B左右,有效提高了低信噪比下BPSK信号载频估计性能。
Aiming at the problem of the carrier frequency estimation of BPSK signal in low signal-to-noise ratio(SNR) condition, a carrier frequency estimation method is proposed based on the maximal symmetrical correlation coefficients of the power spectrum. This method makes full use of the symmetric characteristics of BPSK signal power spectrum, by symmetrical correlation coefficients estimation and maximum searching, to achieve BPSK signal carrier frequency estimation. Theoretical analysis and simulation results show that compared to the square frequency method, the SNR lower limit by using the proposed method has about 10 d B decrease, and the carrier frequency estimation performance of BPSK signal is improved effectively in low SNR condition.
Aiming at the problem of the carrier frequency estimation of BPSK signal in low signal-to-noise ratio(SNR) condition, a carrier frequency estimation method is proposed based on the maximal symmetrical correlation coefficients of the power spectrum. This method makes full use of the symmetric characteristics of BPSK signal power spectrum, by symmetrical correlation coefficients estimation and maximum searching, to achieve BPSK signal carrier frequency estimation. Theoretical analysis and simulation results show that compared to the square frequency method, the SNR lower limit by using the proposed method has about 10 d B decrease, and the carrier frequency estimation performance of BPSK signal is improved effectively in low SNR condition.
引文
[1]Mounir G,Swami A,Durrani T.Blind estimation of frequency offset in the presence of unknown multipath.2000 IEEE International Conference on Personal Wireless Communications[C],Piscataway,NJ,2000:104-108.
[2]Hong D K,Kim D J,Lee Y J,et al.A simple interpolation technique for the DFT for joint system parameters estimation in burst MPSK transmissions[J].IEEE Transactions on communications,2003,51(7):1051-1056.
[3]Hong D K,Kang S J,Ju M C,et al.Low-complexity joint estimation of frequency offset and carrier phase for M-ary PSK[C].Proceedings of 2004 international symposium on intelligent signal processing and communication systems,Piscataway NJ,ISPACS 2004,2004:639-644.
[4]王立乾,赵国庆,郑文秀.基于现代谱估计的PSK信号频率估计方法[J].现代电子技术,2003,23:44-47
[5]殷吉昊,汪玲,陈天麒.一种多个二相编码信号载频、码率与编码序列估计方法[J].信号处理,2006,22(5):639-643
[6]Gardner W A,Spooner C M.Detection and source location of weak cyclostationary Signals:simplifications of the maximum-likelihood receiver[J].IEEE Trans.on Com,1993,41(6):905-916
[7]Gardner W A,Spooner C M.Signal Interception:performance advances of cyclic-feature detectors[J].IEEE Trans on Com,1992,40(1):149-159
[8]金艳,姬红兵.基于循环自相关的PSK信号盲参数估计新方法[J].西安电子科技大学学报(自然科学版),2006,33(6):892-901
[2]Hong D K,Kim D J,Lee Y J,et al.A simple interpolation technique for the DFT for joint system parameters estimation in burst MPSK transmissions[J].IEEE Transactions on communications,2003,51(7):1051-1056.
[3]Hong D K,Kang S J,Ju M C,et al.Low-complexity joint estimation of frequency offset and carrier phase for M-ary PSK[C].Proceedings of 2004 international symposium on intelligent signal processing and communication systems,Piscataway NJ,ISPACS 2004,2004:639-644.
[4]王立乾,赵国庆,郑文秀.基于现代谱估计的PSK信号频率估计方法[J].现代电子技术,2003,23:44-47
[5]殷吉昊,汪玲,陈天麒.一种多个二相编码信号载频、码率与编码序列估计方法[J].信号处理,2006,22(5):639-643
[6]Gardner W A,Spooner C M.Detection and source location of weak cyclostationary Signals:simplifications of the maximum-likelihood receiver[J].IEEE Trans.on Com,1993,41(6):905-916
[7]Gardner W A,Spooner C M.Signal Interception:performance advances of cyclic-feature detectors[J].IEEE Trans on Com,1992,40(1):149-159
[8]金艳,姬红兵.基于循环自相关的PSK信号盲参数估计新方法[J].西安电子科技大学学报(自然科学版),2006,33(6):892-901