一种低信噪比下PSK信号载波频率估计方法  

Rate-A method of PSK signal carrier frequency estimation in low SNR

作　　者：郭强[1] 吴杰[1] 桑睿[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《电视技术》2012年第7期93-96,共4页Video Engineering

基　　金：国防科技重点实验室基金项目(9140C0201010902)

摘　　要：提出了一种利用自适应陷波器对单频信号分量衰减的特性估计PSK信号的载波频率的方法。信号通过陷波器滤波,输出能量最小对应的频点即为信号的载波估计频率。仿真结果表明,在低信噪比环境下该方法的估计误差小于1%。A method of PSK signal carrier frequency estimation which using the characteristic of adaptive notch filter that it can filter the Single-frequency signal is proposed in this paper. Using the adaptive notch filter which the frequency vector is the Reference frequency to find the minimum energy of output, the minimum energy output of the frequency is the signal carrier frequency estimation frequency. Simulation results show that the method of estimation error is less than 1% in the low SNR environment.

关 键 词：载波频率估计 低信噪比 过零点检测法 自适应陷波 

分 类 号：TN919.8[电子电信—通信与信息系统]