基于匹配滤波的载频估计算法
首发时间:2015-11-25
摘要:信号的载频估计在无线电频谱资源的使用和管理中起到了至关重要的作用。本文根据GSM信号功率谱的高斯分布特性,提出了一种基于匹配滤波的载频估计算法。本算法在以谱重心法为信号载频粗估计值的基础上,通过构建的高斯型匹配滤波器模型和原信号功率谱估计值进行互相关运算得到相关性曲线,进一步求取相关性最好的位置的高斯型匹配滤波器平移大小作为载频精估计值。在高斯信道下仿真实验表明:本文算法的估计精度在不同信噪比下比谱重心法的性能均有提高,在信噪比较好的情况下,载频估计的精度提升更为明显。?????
For information in English, please click here
Matched filtering algorithm for carrier frequency estimation
Abstract:Carrier frequency estimation plays a role in the supervision and management of radio spectrum resources. According to power spectral density function of signal in GSM system is Gaussian, a new blind method based on frequency mediacy method and matched filtering algorithm is proposed to estimate signal carrier frequency. This method on the basis of frequency mediacy algorithm as rough estimate result, then by means of buildingGassian matched filter model, and using this model and estimated power spectrum of signal in GSM system to compute the cross correlation of these models, then select the best point of the Gassian matched filter model moving as the final estimated result. The simulation results show that the new algorithm has high accuracy rather than frequency mediacy method at AWGNenvironment, especially at high Signal to Noise Radio.
Keywords: carrier frequency estimation frequency mediacy method matched filtering algorithm the supervision of radio spectrum resources
论文图表:
引用
No.4662815111313214****
同行评议
共计0人参与
勘误表
基于匹配滤波的载频估计算法
评论
全部评论0/1000