基于差分预处理的米波雷达低仰角处理算法

赵光辉; 陈伯孝; 吴向东; 张守宏

doi:10.3724/SP.J.1146.2007.01381

基于差分预处理的米波雷达低仰角处理算法

doi: 10.3724/SP.J.1146.2007.01381

基金项目:

国家部委级项目(51307050201)和教育部新世纪优秀人才支持计划项目(NCET-06-0856)资助课题

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出版历程
- 收稿日期: 2007-08-30
- 修回日期: 2008-01-24
- 刊出日期: 2009-02-19

An Algorithm Based on Differential Preprocessing of Low Elevation Estimation in VHF Radar

摘要

摘要: 由于多径信号的存在，使得米波雷达难以对低仰角目标进行高度测量，为此该文提出一种适用于多径情况下的波达方向估计方法。该方法通过差分处理，补偿了多径信号回波延迟的相位，使得接收回波中仅包含直达波信号，对差分后数据进行常规数字波束形成即可得到目标俯仰角。Monte-Carlo试验结果表明在进行低仰角测高过程中，该方法性能优于空间平滑和线性预测等方法。某米波雷达的实测数据验证了该方法的可行性与有效性。
- 米波雷达;测高;多径;DOA；超分辨
Abstract: Considering the presence of multi-path propagation, it is quite difficult for VHF radar to measure the altitude of a low elevation target. In this paper, a new algorithm is proposed to estimate the DOA of the target, which by using the differential preprocessing, the phase of the multipath wave can be compensated, the echo from multi-path propagation can be subtracted form the signal that received. Then the general DBF can be used to estimate the direction of the direct wave. The Monte-Carlo experiments prove that the performance of the new algorithm is better than that of the spatial smoothing technique and the forward-backward predictors for bearing estimation. The real data from some VHF radar demonstrates the validity and feasibility of the new algorithm.

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参考文献(1)

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