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Experimental Verification of SAR-GMTI Improvement Through Antenna Switching

机译：通过天线切换改善SAR-GMTI的实验验证

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摘要

Recently, theoretical investigations have shown that switching between parts of the transmit and/or receive aperture in a pulse-to-pulse cycle may improve the ground moving target indication (GMTI) performance of a two-channel radar system. This paper intends to verify these findings experimentally for the switching concept for the first time. Accordingly, six different GMTI modes were implemented in the system PAMIR (phased-array multifunctional imaging radar) of the Fraunhofer Institute for High Frequency Physics and Radar Techniques (Fraunhofer FHR) including three switching modes. An experiment was conducted using six cooperative vehicles following a predefined scenario to compare the GMTI performance and, in particular, the positioning accuracy of the different GMTI modes. The results of this experiment as well as the underlying signal processing are presented in this paper. The analysis is based on a multilook constant false-alarm rate detection scheme. Due to the heterogenous nature of the considered scene, the well-known test statistic for homogeneous terrain had to be extended accordingly, and a novel test statistics is proposed.
机译：最近，理论研究表明，以脉冲到脉冲的周期在发射和/或接收孔径的各个部分之间进行切换可能会改善两通道雷达系统的地面移动目标指示（GMTI）性能。本文旨在首次通过实验验证这些发现。因此，在弗劳恩霍夫频率物理和雷达技术研究所（Fraunhofer FHR）的系统PAMIR（相控阵多功能成像雷达）系统中实现了六种不同的GMTI模式，其中包括三种切换模式。在预定的情况下，使用六辆协作车辆进行了实验，以比较GMTI性能，尤其是不同GMTI模式的定位精度。本文介绍了该实验的结果以及潜在的信号处理。该分析基于多外观常量错误警报率检测方案。由于所考虑场景的异质性，必须相应地扩展众所周知的均匀地形测试统计量，并提出一种新颖的测试统计量。

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