计算机科学 ›› 2016, Vol. 43 ›› Issue (8): 71-73.doi: 10.11896/j.issn.1002-137X.2016.08.014
杨俊,江虹,张秋云
YANG Jun, JIANG Hong and ZHANG Qiu-yun
摘要： 针对几种现有的非数据辅助信噪比估计算法对QPSK信号的信噪比估计性能较差的问题,提出了一种改进的低复杂度信噪比估计算法,以提高信噪比估计的估计范围和精度。改进算法首先将接收信号分为同相和正交两路信号；然后充分利用每路信号的过采样率信息,在每个过采样周期内对两路信号分别进行数据统计处理；最后根据处理得到的均值和方差信息获得信噪比估计值。仿真结果表明,该算法在－15~30dB信噪比范围内具有较小的估计偏差和估计均方误差,其估计性能明显优于现有其它算法。
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