基于极化敏感阵列的ADS-B交叠信号分离方法研究

洪 云海1, 吴 梦节1, 胡 焱1, 樊 荣2
1、中国民用航空飞行学院航空电子电气学院
2、中国民用航空飞行学院航空电子电气学院;西藏成丰源科技有限公司

摘要


随着低空经济快速发展，无人机、电动垂直起降飞行器等低空飞行器的数量与种类持续增多，航空应答信号所处的电磁环境日趋复杂。这也导致集中在1090±1MHz频段内的ADS-B信号交叠现象愈发频繁，进一步加大了信号分离难度。鉴于此，本文基于极化敏感阵列，提出一种新的ADS-B交叠信号分离方法。该方法首先借助极化敏感阵列参数估计算法，完成交叠信号的极化参数估计。然后，基于估计得到的极化参数设计极化滤波器，依托不同信号源的极化状态差异提取有效信号分量，最终实现ADS-B交叠信号的有效分离。数值仿真实验果验证了所提方法的有效性，证实了所提方法具备在信号源时间、频率、空间三维度同时交叠的分离能力，具备较强的工程实用价值。

关键词


阵列信号处理；极化敏感阵列；ADS-B；极化滤波器；交叠信号分离

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参考


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