太赫兹科学与电子信息学报2017，Vol.15Issue(5)：849-854,6.DOI:10.11805/TKYDA201705.0849
一种高效的APSK调制信号载波频偏估计算法
An efficient algorithm for estimating carrier frequency offset of APSK modulated signal
李东波 1欧阳喜1
作者信息
- 1. 信息工程大学 信息系统工程学院,河南 郑州 450001
- 折叠
摘要
Abstract
An effective algorithm is presented for estimating carrier frequency offset of Amplitude Phase Shift Keying(APSK) modulated signal. The data of the signal is obtained after the process of timing synchronization. The algorithm is based on the characteristic that the radiuses of the points of the constellation of APSK modulated signal are different. The value of the data is set to zero except the points with the smallest radius. The spectrum line of the quartic spectrum of the zeroing data is extracted to estimate carrier frequency offset. Simulation results show that this algorithm has low complexity and high practicality. The mean square error of the estimation of carrier frequency offset is below -80 dB when the number of symbol is 500 and the signal to noise ratio is above 15 dB.关键词
幅度相位键控/载波频偏估计/星座图/4次方谱Key words
Amplitude Phase Shift Keying/carrier frequency offset estimation/constellation/quartic spectrum分类
信息技术与安全科学引用本文复制引用
李东波,欧阳喜..一种高效的APSK调制信号载波频偏估计算法[J].太赫兹科学与电子信息学报,2017,15(5):849-854,6.
