针对低信噪比场景的一种改进MD算法  

An improved MD algorithm for low signal-to-noise ratio scenarios

作　　者：张文虎 向聪[1] 康玉奇 ZHANG Wenhu;XIANG Cong;KANG Yuqi(Xi’an Electronic Engineering Research Institute,Xi’an 710100,China)

机构地区：[1]西安电子工程研究所,陕西西安710100

出　　处：《无线互联科技》2025年第5期1-6,共6页Wireless Internet Science and Technology

摘　　要：低信噪比场景中,应用子孔径相关法(MapDrift,MD)估计的多普勒调频率准确性下降,最终的成像结果恶化。文章提出一种基于固定窗长的数据滑窗的MD算法,介绍了固定窗长的数据滑窗技术的优点,通过降低噪声信号对相关峰值处的影响,提高了多普勒调频率的估计准确性。实测数据处理结果表明,所提算法具有较高的估计精度。In low signal-to-noise ratio scenarios,the accuracy of Doppler chirp rate estimation using the sub-aperture correlation method(MD)decreases,leading to degraded imaging results.This paper proposes an MD algorithm based on a fixed-window-length data sliding window technique.The advantages of the fixed-window-length data sliding window technique are introduced.By reducing the influence of noise signals on the correlation peaks,the accuracy of Doppler chirp rate estimation is improved.The results of processing measured data demonstrate that the proposed algorithm achieves higher estimation accuracy.

关 键 词：合成孔径雷达 低信噪比 子孔径相关法 滑窗 

分 类 号：TN98[电子电信—信息与通信工程]