东南大学学报（自然科学版）2017，Vol.47Issue(2)：209-214,6.DOI:10.3969/j.issn.1001-0505.2017.02.002
一种可用于莱斯衰落信道的信噪比估计算法
An SNR estimation algorithm for Rician fading channel
摘要
Abstract
Aimed at the problems in Rician fading channel,i.e.general Non-Data-Aided signal-tonoise ratio(SNR) estimation algorithms were very complex and usually suitable for a certain modulation pattern.This paper proposed an SNR estimation algorithm.On the basis of establishing equivalent system model,the relationship expression of SNR,expectation and variance of received signals were deduced.Under the conditions of the Rician fading channel,the deduced expression had no analytic solutions,thus using the polynomial fitting method to obtain approximate solutions of SNR during a certain range.Simulations and comparison experiments show that,the algorithm does not need any training sequence and is universal for both lower and higher order modulations.If the channel Rician factor K =10 dB and the SNR is between 5 and 25 dB,the normalization bias is lower than 0.2,the computational complexity is comparable with M2M4 algorithm,thus satisfying requirements of general engineering application.关键词
信噪比估计/莱斯衰落信道/多项式拟合/非数据辅助Key words
signal-to-noise ratio(SNR) estimation/Rician fading channel/polynomial fitting/non-data-aided分类
信息技术与安全科学引用本文复制引用
陈萍,熊蔚明..一种可用于莱斯衰落信道的信噪比估计算法[J].东南大学学报（自然科学版）,2017,47(2):209-214,6.基金项目
国家高技术发展计划(863计划)资助项目(2011AA7033045). （863计划）
