电讯技术2018，Vol.58Issue(1)：41-45,5.DOI:10.3969/j.issn.1001-893x.2018.01.008
基于数据辅助的MPSK信号频域信噪比估计
Data-aided SNR Estimation of MPSK Signals in Frequency-domain
甘明1
作者信息
- 1. 中国西南电子技术研究所,成都610036
- 折叠
摘要
Abstract
In order to improve the estimation accuracy of Multiple Phase Shift Keying (MPSK) signals in low signal-to-noise ratio(SNR) condition before the carrier frequency is accurately recovered,a frequency -domain data-aided(DA) SNR estimator for MPSK signals is proposed.After the symbol timing recovery and frame synchronization,the algorithm is used to extract the pilot symbols,and then estimate the SNR in the frequency domain after correlation processing.Simulation results show that the mean estimation value has no bias and it is not influenced by the carrier frequency error.Under the circumstances that the symbol length is 512 and the SNR is-10 dB,its mean square error(MSE) and Cramer-Rao lower bounds (CRLB) deviation is only 0.15 dB,so it is suitable for the applications in which superior SNR performance at low SNR before the carrier frequency recovery is required.关键词
MPSK信号/信噪比估计/数据辅助/最大似然估计/载波频率鲁棒Key words
MPSK signal/SNR estimation/data aided/maximum likelihood estimation/carrier frequency robust分类
信息技术与安全科学引用本文复制引用
甘明..基于数据辅助的MPSK信号频域信噪比估计[J].电讯技术,2018,58(1):41-45,5.
