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.
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.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2005年第2期87-90,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然基金资助项目(60372094)
关键词
恒虚警
信号检测
迭代算法
constant false alarm
signal detection
iterative algorithm
