北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2005, Vol. 28 ›› Issue (2): 87-90.doi: 10.13190/jbupt.200502.87.baij

• 研究报告 • 上一篇    下一篇

基于恒虚警的信号检测迭代算法

白剑,杨亚飞,徐迎晖,杨榆,杨义先   

  1. 北京邮电大学 信息安全中心, 北京 100876
  • 出版日期:2005-04-28 发布日期:2005-04-28

An Iterative Algorithm of Signal Detection Based on CFAR

BAI Jian,YANG Yafei,XU Yinghui,YANG Yu,YANG Yixian   

  1. Information Security Center, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Online:2005-04-28 Published:2005-04-28

摘要: 提出了在信号检测中利用恒虚警估计噪声特性的迭代算法,该算法能够在信噪比达到一定值的情况下,比较准确地检测出中频信号包含的有用信号的数量及其中心频率。算法的基本思想在于在未知情况下估计信号中噪声统计特性,利用估计的噪声统计特性将信号和噪声分离,从而获得实际信号的数量、带宽、中心频率等基本参数。仿真结果表明该迭代算法计算简便,且具有较好的适应性。

关键词: 恒虚警, 信号检测, 迭代算法

Abstract: An iterative algorithm based on constant false alarm rate(CFAR) in signal detection fields is presented in this paper. This algorithm can estimate the statistical characteristic of intermediate frequency noise. It extracts signal from noise by analyzing statistical characteristic. It is easy to obtain the parameter of signal such as signal counts, bandwidth, carrier frequency after pure signal is extracted. This algorithm has been proved to be a simple and well self-adaptive method by MATLAB simulation.

Key words: constant false alarm, signal detection, iterative algorithm

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