计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (33): 112-115.

• 数据库、信号与信息处理 • 上一篇    下一篇

无源探测中微弱目标的多步检测算法研究

赵立权1,许 聪2,贾雁飞3   

  1. 1.东北电力大学 信息工程学院,吉林 132012
    2.中国黑龙江省联通公司,哈尔滨 150090
    3.北华大学 电气与信息工程学院,吉林 132013
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-11-21 发布日期:2011-11-21

Multi-stage detection algorithm of weak target in passive detection

ZHAO Liquan1,XU Cong2,JIA Yanfei3   

  1. 1.College of Information Engineering,Northeast Dianli University,Jilin 132012,China
    2.China Union Heilongjiang,Harbin 150090,China
    3.College of Electrical and Information Engineering,Beihua University,Jilin 132013,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-11-21 Published:2011-11-21

摘要: 针对在无源探测中掩膜效应严重影响远处微弱目标的检测问题,提出了一种多步检测算法。该算法采用广义对消算法去除目标回波中由于掩膜效应造成的直达波和杂波,并利用优化的CLEAN算法消除近处强目标回波,通过逐步消除强目标回波,达到提高检测微弱目标性能的目的。仿真结果表明,该算法能够较准确地估计出微弱目标的位置,计算量较小,在复杂背景下同样能够较好地检测出目标。

关键词: 无源探测, 信号检测, 掩膜效应, 回波信号

Abstract: To overcome the problem that masking effect can seriously affect the detection performance of weak far away target,a multi-stage detection algorithm is proposed.This algorithm adopts the extensive cancellation algorithm to remove the direct signal and clutter signal that are caused by masking effect,and uses optimized CLEAN algorithm to remove strong target echo nearby.By removing strong target echo gradually,better detection performance of weak target echo is achieved.Simulation results prove the new algorithm can estimate position of the weak target more accurately and detect the target better in strong interference background with less calculation.

Key words: passive detection, signal detection, masking effect, echo signal