JIANG Zheng-bo, HONG Wei, LIU Jin, et al. Novel data-aided SNR estimation algorithm for QPSK signal in AWGN channel[J]. 2008, (6): 119-125.DOI:
基于数据辅助的AWGN信道下QPSK信号信噪比估计
摘要
提出了一种以噪声功率为主导的新的信噪比估计算法
仿真结果表明
该算法比现有的基于DA的最大似然估计方法具有更好的性能
尤其在低信噪比条件下
可以同时具有更好的精度和更高的可信度
而且不受接收机相位误差的影响。最后分析了本算法的误差来源
并给出了应用建议。
Abstract
Novel data-aided SNR estimation algorithm for QPSK signal in AWGN channel was presented.The analytical and simulated results show that the new SNR estimator performs better than ML-DA estimators
especially in the condi-tion of low SNR
it is more precise and more reliable
and is not sensitive to phase errors of the receiver.Finally
the ori-gin of the new estimator’s error was explored and some suggestions were made on its application.