S模式交叠信号的PA分离算法性能分析

发布时间：2018-02-02 00:52

本文关键词： S模式交叠信号分离 PA算法奇异值分解阵列天线　出处：《现代雷达》2017年02期 　论文类型：期刊论文

【摘要】：为了提升高密度信号背景下对S模式应答的接收能力,投影算法(PA)在阵列接收的基础上采用投影技术分离S模式交叠信号,因其具有良好的稳定性和实用性而成为经典的信号分离方法。首先,分析了PA算法针对的问题在各种空中流量密度下的发生概率;其次,在PA算法的基础上推导了交叠信源数检测与信号到达方向的关系,进一步分析了信号到达角(DOA)与噪声增益之间的关系,并说明了信号DOA对分离后的信号解码的影响;最后,以均匀线阵(ULA)为例仿真说明了信号DOA对信源数检测、噪声增益的影响。结果表明,对于两个S模式交叠的情况,PA算法在六阵元ULA下可以达到80%以上的检测成功率,并有较好的分离效果。
[Abstract]:In order to improve the ability of receiving S-mode response in the background of high-density signal, the projection algorithm (PAA) is used to separate the S-mode overlapping signal based on array reception. Because of its good stability and practicability, it has become a classical signal separation method. Firstly, the probability of PA algorithm under various air flow density is analyzed. Secondly, on the basis of PA algorithm, the relationship between signal arrival direction and overlapping source number detection is deduced, and the relationship between signal arrival angle load and noise gain is further analyzed. The influence of signal DOA on the decoding of the separated signal is also explained. Finally, the effect of signal DOA on signal number detection and noise gain is illustrated by the example of uniform Linear Array (ULAA). The results show that the two S-modes overlap. The PA algorithm can achieve a detection success rate of more than 80% under six array element ULA, and has a good separation effect.
【作者单位】：海军航空工程学院电子信息工程系;中国人民解放军92337部队;南京电子技术研究所;
【基金】：国家自然科学基金资助项目(61032001)
【分类号】：TN957.51
【正文快照】： 0引言在空中交通管制领域中,二次监视雷达(SSR)是目前对空域监视的最主要手段之一[1]。以SSR为基础或沿袭SSR信号协议的系统,诸如多点定位系统(MLAT)、空中交通预警和防撞系统(TCAS)以及自动相关监视系统(ADS-B)等,得到了越来越广泛的应用[2-3]。以上这些系统都共享SSR的下行

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