摘要
低信噪比雷达脉冲检测一直是电子侦察领域的难题。本文提出了一种基于信道化和自相关函数的双门限级联滤波算法,采用信道化能够滤除带外噪声,提高信噪比;使用自相关函数,能够进一步提高信噪比;使用双门限脉冲检测,能够保证低信噪比时脉冲检测的完整性。最后对信道化以及自相关带来的问题进行了讨论和后处理。实验结果表明,采用本文提出的脉冲检测算法能够有效降低信号检测的信噪比下限。
The radar pulse detection in low signal-to-noise ratio is always a difficult problem in the field of elec-tronic reconnaissance. A dual-threshold pulse detection algorithm based on channelization and autocorrelation is presented. Using channelization can filter out-of-band noise and improve signal-to-noise ratio;using autocor-relation function can increase signal power further. The integrity of the pulse detection in low signal-to-noise ra-tio can be ensured by using the dual-threshold algorithm. And finally, the problems caused by the channelization and autocorrelation are discussed and post processed. Experimental results show that use of the presented pulse de-tection algorithm can decrease low limit of signal-to-noise ratio of signal detection.
出处
《火控雷达技术》
2014年第4期50-53,共4页
Fire Control Radar Technology
关键词
脉冲检测
自相关
信道化
pulse detection
autocorrelation
channelization
