基于累加分类的ADS-B交织信号处理方法
发布时间：2018-11-02 17:54
【摘要】：广播式自动相关监视作为国际民航组织主推的监视技术,近年来受到了广泛关注,越来越多的飞行器配备了ADS-B收发设备。介于ADS-B信号的广播体制以及空域流量的不断增加,不同的ADS-B信号之间不可避免会发生交织;而信号交织会给ADS-B信号的解码带来严重影响,进而造成信息的错误读取或丢失。针对上述问题,本文提出了一种单天线下基于累加判决的解交织算法:首先通过单天线下的有效脉冲位置检测以及基于希尔伯特变换的交织检测分别获得信号的起始位置以及信号交织位置,进而得到两条信号之间的相对时延,从而对数据进行累加并利用K-means方法进行分类,最终得到比特位判决结果以实现交织信号分离;针对已有的解交织算法进行了比较,验证本文所提算法在交织信号之间存在一定功率差时有着良好的分离效果。
[Abstract]:As the main monitoring technology of ICAO, broadcast automatic correlation surveillance has been paid more and more attention in recent years. More and more aircraft are equipped with ADS-B transceiver equipment. Because of the broadcasting system of ADS-B signal and the increasing of space traffic, the interleaving of different ADS-B signals is inevitable. The interleaving of signals will seriously affect the decoding of ADS-B signals, which will result in the error reading or loss of information. In response to the above problems, In this paper, a new algorithm of deinterleaving based on cumulative decision is proposed. Firstly, the starting position of the signal and the interleaving position of the signal are obtained by the effective pulse position detection under the single antenna and the interleaving detection based on Hilbert transform, respectively. Then the relative delay between the two signals is obtained, and then the data is accumulated and classified by K-means method. Finally, the result of bit decision is obtained to achieve the separation of interleaved signals. Compared with the existing deinterleaving algorithms, it is verified that the proposed algorithm has a good separation effect when there is a certain power difference between interleaved signals.
【作者单位】： 中国民航大学天津市智能信号与图像处理重点实验室;
【基金】：国家重点研发计划项目(2016YFB0502402)
【分类号】：V355;TN911.7
[Abstract]:As the main monitoring technology of ICAO, broadcast automatic correlation surveillance has been paid more and more attention in recent years. More and more aircraft are equipped with ADS-B transceiver equipment. Because of the broadcasting system of ADS-B signal and the increasing of space traffic, the interleaving of different ADS-B signals is inevitable. The interleaving of signals will seriously affect the decoding of ADS-B signals, which will result in the error reading or loss of information. In response to the above problems, In this paper, a new algorithm of deinterleaving based on cumulative decision is proposed. Firstly, the starting position of the signal and the interleaving position of the signal are obtained by the effective pulse position detection under the single antenna and the interleaving detection based on Hilbert transform, respectively. Then the relative delay between the two signals is obtained, and then the data is accumulated and classified by K-means method. Finally, the result of bit decision is obtained to achieve the separation of interleaved signals. Compared with the existing deinterleaving algorithms, it is verified that the proposed algorithm has a good separation effect when there is a certain power difference between interleaved signals.
【作者单位】： 中国民航大学天津市智能信号与图像处理重点实验室;
【基金】：国家重点研发计划项目(2016YFB0502402)
【分类号】：V355;TN911.7
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