低信噪比条件下雷达对高速运动目标的检测方法  

Test Method of Radar to Moving Targets with High Speed under Low SNR Condition

作　　者：张放 徐磊 ZHANG Fang;XU Lei(The 8th Research Academy of CSSC,Yangzhou 225101,China)

机构地区：[1]中国船舶集团有限公司第八研究院,江苏扬州225101

出　　处：《舰船电子对抗》2022年第2期57-61,共5页Shipboard Electronic Countermeasure

摘　　要：对高速运动的微弱目标进行长时间相干积累检测时,回波跨距离单元移动导致积累性能下降。通过分析回波发生距离偏移的原因,在频域脉压后对相位进行校正使得回波对齐,信噪比得以改善。以特征点提取的图像变换处理方法是一种非相干积累检测,可以从噪声图像中提取出目标的运动轨迹。仿真验证了上述方法的有效性。When long time coherent accumulation test is performed to weak moving targets with high speed,the echo motion across distance units will lead to the accumulation performance reduced.Through analyzing why the echo distance shifts and correcting the phase after pulse compression in frequency domain,the echoes are aligned and the signal-to-noise ratio(SNR)is improved.The image conversion processing method by feature point extracting is a no-coherent accumulation test,can extract the moving orbit of target from noise image.The simulation validates the effectiveness of above method.

关 键 词：相干积累 频域距离 偏移校正 非相干积累 图像检测 

分 类 号：TN957.51[电子电信—信号与信息处理]