摘要
正交频分复用(OFDM)调制雷达中跨距离单元走动问题降低了高速微弱目标检测性能,为此,提出一种基于Prewitt算子和Radon变换的OFDM雷达高速微弱目标检测算法。首先分析了多脉冲积累出现的跨距离单元走动以及Radon变换受噪声干扰问题,然后采用Prewitt算子卷积运算抑制噪声并保留回波能量,采用Radon变换沿距离单元走动斜线进行能量积累。理论分析和仿真结果表明,该算法具有比Hough变换和动目标检测(MTD)更优的低信噪比背景下的高速微弱目标检测性能,并能有效实现多目标检测。
The problem of across range unit walking can deteriorate the performance of Orthogonal Frequency Division Multiplexing(OFDM)modulated radar in high-speed weak target detection.Therefore,a high-speed weak target detection algorithm for OFDM radar is proposed based on Prewitt operator and Radon transform.Firstly,the problems of across range unit walking caused by multi-pulse accumulation and of the noise interference on Radon transform are analyzed.Then,the Prewitt operator is used for convolution operation to suppress noise and retain echo energy,and Radon transform is used to accumulate energy along the range unit walking diagonal.Theoretical analysis and simulation results show that:Compared with Hough transform and Moving Target Detection(MTD),the proposed algorithm has better high-speed weak target detection performance at low Signal-to-Noise Ratio(SNR),and it can effectively achieve multi-target detection.
作者
杨勇军
肖志文
常明
张茂龙
于斯扬
YANG Yongjun;XIAO Zhiwen;CHANG Ming;ZHANG Maolong;YU Siyang(Air Force Communication Sergeant Academy,Dalian 116000,China)
出处
《电光与控制》
CSCD
北大核心
2024年第6期101-104,111,共5页
Electronics Optics & Control
