相参处理间隔较短条件下基于稀疏重构及形态成分分析的航管雷达风电场杂波抑制  

Clutter Suppression of Wind Farm Based on Sparse Reconstruction and Morphological Component Analysis for ATC Radar under Short Coherent Processing Interval Condition

作　　者：何炜琨[1] 毕峰华 王晓亮[1] 张莹 HE Weikun;BI Fenghua;WANG Xiaoliang;ZHANG Ying(Tianjin Key Lab for Advanced Signal Processing,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300

出　　处：《电子与信息学报》2021年第7期1954-1961,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金委员会与民航局联合资助项目(U1533110);中央高校基本科研业务费项目中国民航大学专项资助(3122018D011);天津市自然科学基金(19JCQNJC01000)。

摘　　要：近些年来,世界各国越来越重视风力发电的发展。风电场的存在可能对航管监视雷达性能产生负面影响,因此风电场杂波抑制技术的研究对于提升航管监视雷达工作性能、保障空中交通安全具有重大意义。形态成分分析(MCA)算法根据信号稀疏特征的不同应用于风电场杂波抑制时,计算量较低且性能较好。但是针对实际雷达参数中相参处理间隔(CPI)较短造成的谱分辨率降低及信号特征不明显时,MCA算法的杂波抑制性能受到影响,因此选择将稀疏重构算法与MCA算法结合用于短CPI情况下的风电场杂波抑制。该文认为短CPI接收回波数据为较长CPI雷达回波数据基础上发生尾部数据缺省,继而利用稀疏重构算法对缺省数据进行恢复,再利用MCA算法抑制风电场杂波。实验结果验证了该方法的有效性。In recent years,countries around the world have paid more and more attention to the development of wind power.The existence of wind farms may have a negative impact on the performance of air traffic control surveillance radars.Therefore,the research on the clutter suppression technology of wind farms is of great significance to improve the work performance of air traffic control surveillance radars and ensure the safety of air traffic.When the Morphological Component Analysis(MCA)algorithm is applied to the wind farm clutter suppression based on the difference of sparse characteristics for the signals,the calculation burden is lower and the performance is better.However,the clutter suppression performance of the MCA algorithm is affected when the spectral resolution is reduced due to the short Coherent Processing Interval(CPI)and the signal characteristics are not obvious.Therefore,the sparse reconstruction algorithm and the MCA algorithm are combined to suppress the clutter in the wind farm with a small number of coherent pulses.It is considered that the short CPI received echo data is the default of tail data on the basis of the longer CPI radar echo data,and then the sparse reconstruction algorithm is used to recover the default data,and the MCA algorithm is used to suppress wind farm clutter.The experimental results verify the effectiveness of the proposed method.

关 键 词：风电场 形态成分分析 稀疏重构 杂波抑制 

分 类 号：TN958.3[电子电信—信号与信息处理]