Methods of eliminating Doppler dispersion in synthetic wideband signal

2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI:10.1109/ICMMT.2008.4540743

W. Peng, Xue-gang Wang, Jian-hong Zhao

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引用次数: 5

Abstract

As the technological advances, it is possible to perform wide bandwidth signal processing for high range resolution and target identification in the modern radar systems. In order to prevent the deleterious effects of dispersion for wideband signals, a wideband signal can be synthesized by coherently combining the individual narrow band components, meanwhile, clutter mitigation, estimation and discrimination of target's velocity is enabled by performing coherent pulse train in each subband. However, the separate and independent processing using conventional Doppler filter bank in a subband can also introduce deleterious effects of target Doppler dispersion among subbands and cause the distortion on synthesized one-dimensional range profile. In this paper, we first analyze the target Doppler dispersion among subbands and deleterious effects of following recombination, and then propose an effective method to eliminate the deleterious effects of target Doppler dispersion in subbands. The method is easy to be realized and tractable and do not require an increment of computation. Its good performance is verified by simulation results.

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合成宽带信号中多普勒频散的消除方法

随着技术的进步，在现代雷达系统中进行宽带宽信号处理以实现高距离分辨率和目标识别已成为可能。为了防止色散对宽带信号的有害影响，可以通过相干组合各个窄带分量来合成宽带信号，同时通过在每个子带进行相干脉冲串来实现对目标速度的杂波抑制、估计和识别。然而，传统的多普勒滤波器组在子带内进行分离和独立处理也会引入子带间目标多普勒频散的有害影响，导致合成的一维距离像失真。本文首先分析了子带间目标多普勒频散和后续复合的有害影响，然后提出了一种消除子带间目标多普勒频散有害影响的有效方法。该方法实现简单，易于操作，不需要增加计算量。仿真结果验证了其良好的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2008 International Conference on Microwave and Millimeter Wave Technology

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