宽带相干多辐射源个数估计及长基线测向算法

发布时间：2018-02-08 10:31

本文关键词： 信号个数估计长基线测向多辐射源宽带相干信号单基线　出处：《宇航学报》2014年01期 　论文类型：期刊论文

【摘要】：在现代电子对抗中,针对诱饵背景下宽带相干多辐射源的测向问题,本文提出了基于单基线的宽带多辐射源个数估计及测向算法。首先,根据两个天线接收信号谱线共轭相乘产生的新信号谱线结构特征,对辐射源的个数进行估计;在辐射源个数已知的情况下,采用基于宽带信号相位谱的分数延时估计算法,间接地估计出各个辐射源发射的信号到达两个天线的时差,进而利用估计出的这些时差对各个辐射源进行测向。此方法设备简单,仅需要两个天线阵元组成的单基线系统。仿真结果表明,在一定条件下可以准确估计出宽带相干多辐射源的个数,并且能够同时对空间多个辐射源进行精确测向。
[Abstract]:In the modern electronic countermeasure, aiming at the direction finding problem of wideband coherent multiple emitter in decoy background, this paper proposes an algorithm for estimating the number of wideband multi-emitter and direction finding based on single baseline. The number of emitter sources is estimated according to the structure characteristics of the new signal lines generated by conjugate multiplication of the received signal lines of two antennas, and the fractional delay estimation algorithm based on the phase spectrum of wideband signals is adopted when the number of radiation sources is known. The time difference between the two antennas is estimated indirectly by the signals transmitted by each emitter, and then the estimated time difference is used to measure the direction of each emitter. The simulation results show that the number of wideband coherent multiple emitters can be estimated accurately under certain conditions, and the direction finding of multiple radiation sources in space can be carried out at the same time.
【作者单位】：南京航空航天大学电子信息工程学院;
【基金】：国家自然科学基金(61201208) 江苏高校优势学科建设工程资助项目南京航空航天大学基本科研业务费专项科研项目(NN2012068)
【分类号】：TN971

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