Interference Suppressing and Null Broadening Method for GNSS Receiver Based on Circular Antenna Array

2010 International Conference on Communications and Mobile Computing Pub Date : 2010-04-12 DOI:10.1109/CMC.2010.276

Enxiao Liu, Wei-Xiao Meng, Guang-hua Zhang

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引用次数: 3

Abstract

How to improve the performance of Global Navigation Satellite System (GNSS) receiver in purposive interferences and complex electromagnetic environment is a challenge topic. Moreover, the small angle offset in interference direction, which is caused by high-speed relative motion between jammer and receiver makes big trouble for anti-jammering processing. Although some null broadening technics have been proposed to deal with this situation, they all aim at linear array, which is not applicable for practical situation. This paper introduces Generalized Sidelobe Canceller (GSLC) configuration, which is insensitive to array imperfections, and Adaptive Digital Beamforming (ADBF) algorism in circular array to suppress interferences, and formulates the null broadening model in circular condition by correcting covariance matrix, which solve the problem of interference directions mismatch. Simulation results demonstrate that the proposed method could suppress as many interferences as the theoretical maximum and null can be broadened significantly by correcting covariance matrix.

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基于圆形天线阵的GNSS接收机干扰抑制与零宽展宽方法

如何提高全球卫星导航系统(GNSS)接收机在有目的干扰和复杂电磁环境下的性能是一个具有挑战性的课题。此外，干扰机与接收机之间高速相对运动导致的干扰方向上的小角偏移给抗干扰处理带来了很大的麻烦。虽然提出了一些零展宽技术来处理这种情况，但它们都是针对线性阵列的，并不适用于实际情况。本文引入了对阵列缺陷不敏感的广义旁瓣抵消(GSLC)配置和圆形阵列自适应数字波束形成(ADBF)算法来抑制干扰，并通过修正协方差矩阵建立了圆形条件下的零展宽模型，解决了干扰方向不匹配的问题。仿真结果表明，该方法可以抑制理论最大值的干扰，并且通过修正协方差矩阵可以明显地扩大零值。

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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2010 International Conference on Communications and Mobile Computing

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