航空学报 > 2011, Vol. 32 Issue (9): 1705-1713   doi: CNKI:11-1929/V.20110517.1516.004

一种快速自适应角度-多普勒补偿算法

田斌, 朱岱寅, 朱兆达   

  1. 南京航空航天大学 电子信息工程学院, 江苏 南京 210016
  • 收稿日期:2010-12-20 修回日期:2011-01-27 出版日期:2011-09-25 发布日期:2011-09-16
  • 通讯作者: 朱岱寅(1974-) 男,博士,教授,博士生导师。主要研究方向:雷达成像与信号处理。 E-mail: zhudy@nuaa.edu.cn E-mail:zhudy@nuaa.edu.cn
  • 作者简介:田斌(1983-) 男,博士研究生。主要研究方向:动目标检测与阵列信号处理。 Tel: 025-84896490-12501 E-mail: tianbin218@163.com; 朱兆达(1939-) 男,教授,博士生导师。主要研究方向:雷达信号检测与处理。 E-mail: zzdee@nuaa.edu.cn
  • 基金资助:

    国家自然科学基金 (61071165);航空科学基金(20102052024)

A Fast Adaptive Angle Doppler Compensation Method

TIAN Bin, ZHU Daiyin, ZHU Zhaoda   

  1. College of Electronics and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2010-12-20 Revised:2011-01-27 Online:2011-09-25 Published:2011-09-16

摘要: 自适应角度-多普勒补偿(Adaptive Angle Doppler Compensation,A2DC)算法可在惯导参数未知的情况下解决非正侧视阵列中由杂波距离相关性引起的非均匀问题,但该算法运算量大、工程实现困难。本文首先对A2DC算法的基本工作原理进行了深入的分析,在此基础上,针对算法运算量大的缺点,将分块处理和近似投影子空间跟踪(Projection Approximation Subspace Tracking,PAST)技术引入到A2DC算法中,提出一种快速自适应角度-多普勒补偿(Fast Adaptive Angle Doppler Compensation, FA2DC)算法。与常规的A2DC算法相比,二者补偿性能相当,但FA2DC算法的运算量显著降低。系统仿真验证了此算法的有效性。

关键词: 非正侧视阵列, 自适应角度-多普勒补偿, 近似投影子空间跟踪, 分块处理, 空时自适应处理

Abstract: The adaptive angle Doppler compensation (A2DC) method can be applied to compensate for the clutter range dependence for non-sidelooking arrays without requiring any navigation data. However, this method suffers from a serious drawback of high computational complexity which limits its real-time application. In this paper, the principle of the A2DC method is first investigated. Then, to address the computational burden, a block processing and projection approximation subspace tracking (PAST) technique is inserted into the A2DC method and a fast A2DC (FA2DC) method is proposed. Simulation results are presented to show that these two compensation methods demonstrate approximately the same performance, but the proposed method reduces the computational complexity significantly.

Key words: non-sidelooking array, adaptive angle Doppler compensation, projection approximation subspace tracking, block processing, space time adaptive processing

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