基于改进算法的调制信号的载波频率估计  

Estimation of carrier frequency of modulation signal based on improved alogorithm

作　　者：赵颖[1] 

机构地区：[1]中国电子科技集团第十研究所,四川成都610036

出　　处：《电子设计工程》2016年第6期29-31,共3页Electronic Design Engineering

摘　　要：本文提出一种改进的用四次方功率谱估计QPSK、16QAM等调制信号载波频率的算法,利用提出的改进算法,在MATLAB环境下以高斯白噪声信道模型仿真,信号在较低的信噪比环境下获得了比传统的功率谱估计更好的载频估计效果,使载频估计的正确率在信噪比为-10 d B时可达到95%以上。An improved algorithm of fourth power spectrum to the estimation of the carrier frequency of QPSK, 16 QAM modulation signal is presented. In the MATLAB, under the channel model of Gaussian white noise to simulate,using the improved algorithm,the signals obtain a good estimate of the carrier frequency in lower SNR which is better than using the traditional power spectrum estimation way. The new algorithm improved the accuracy of the carrier estimation to 95% at-10 d B SNR.

关 键 词：低信噪比 载频估计 QPSK 16QAM 

分 类 号：TN92[电子电信—通信与信息系统]