一种基于排序因子的背景噪声功率估计算法  

A Novel Background Noise Power Estimation Algorithm Based on Sorting Factor

作　　者：徐传俊 李志强[1] 李飞龙[1] 李健伟[1] 

机构地区：[1]解放军理工大学通信工程学院卫星通信重点实验室,江苏南京210007

出　　处：《电子质量》2016年第3期83-87,共5页Electronics Quality

基　　金：国家自然科学基金资助项目(No.61571464)

摘　　要：背景噪声功率估计精度是频域干扰抑制算法性能好坏的关键因素,针对当前变换域窄带干扰抑制算法中背景噪声功率估计算法存在计算量大、实现复杂的问题,提出了一种基于排序因子的背景噪声功率估计算法。通过调整排序因子,该算法在满足相同背景噪声功率估计精度条件下能够大大减小计算量;其次,从频率分量统计点数、干扰信号强度及带宽、排序因子等三方面对背景噪声估计算法的性能进行了仿真分析。根据得出的结论,该算法的对工程实现中的背景噪声估计具有一定的指导意义。Background noise power estimation accuracy is a key factor in the frequency domain interference suppression algorithm performance.In this paper,we propose a background noise power estimation algorithm based sorting factortoresolvethelargecalculationand complexityofthecurrentnarrowband interferencesuppression algorithm in transform domain.By adjusting sorting factors,the algorithm can satisfy the background noise power estimate accuracy and reduce calculation amount to the greatest degree;Numerical simulations areperformed todemonstratetheperformanceoftheproposed method fromtheaspectofthestatisticalpointin frequency component,the interference signal strength and bandwidth and sorting factor.According to the conclusions ofthe proposed background noise estimation algorithm,ithas a great significance in engineering implementation.

关 键 词：频域干扰抑制 背景噪声 功率估计 排序因子 归一化均方误差 

分 类 号：TN911.4[电子电信—通信与信息系统]