基于Welch和柔性形态学的LPI信号噪声基底处理  

Noise base processing of LPI signals based on Welch and flexible morphology

作　　者：耿常青 杨承志[1] 张志刚 刘炳烜 Geng Changqing;Yang Chengzhi;Zhang Zhigang;Liu Bingheng(School of Aviation Operations and Services,Aviation University of Air Force,Changchun 130022,China;Unit 94333 of PLA,Weifang 261000,China)

机构地区：[1]空军航空大学航空作战勤务学院 [2]解放军94333部队

出　　处：《信息技术与网络安全》2018年第10期24-27,共4页Information Technology and Network Security

基　　金：国家自然科学基金(61571462)

摘　　要：针对因噪声基底估计不准而导致的现有雷达信号处理算法精度不高的问题,提出了Welch和柔性形态学联合处理雷达信号噪声基底的算法。首先对采样频谱进行分段插值处理,而后采用基于柔性形态学的带比例系数的腐蚀和膨胀操作,以降低固定尺度对算法准确度产生的影响。最后,用原信号减去估计噪声序列,得到运算结果的同时,控制了算法的计算量。Aiming at the low accuracy of the existing radar signal processing algorithm caused by the incorrect estimation of the noise base,an algorithm combining Welch and flexible morphology for processing the noise base of radar signal is proposed.Firstly,the sampling spectrum is segmented and interpolated,then the corrosion and expansion operation with proportion coefficient based on flexible morphology is adopted to reduce the influence of fixed scale on the accuracy of the algorithm.Finally,the original signal subtracts the estimation of the noise sequence,the calculation results are obtained,and the computational complexity of the algorithm is controlled.

关 键 词：信号处理 噪声基底 Welch谱估计 柔性形态学 

分 类 号：TN929.5[电子电信—通信与信息系统]