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首页> 外文期刊>Radar, Sonar & Navigation, IET >Cramér–Rao bounds for L-band digital aeronautical communication system type 1 based passive multiple-input multiple-output radar
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Cramér–Rao bounds for L-band digital aeronautical communication system type 1 based passive multiple-input multiple-output radar

机译：基于1类无源多输入多输出雷达的L波段数字航空通信系统的Cramér–Rao界

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In this study, of concern is the achievable estimation accuracy for a non-coherent passive multiple-input multiple-output (MIMO) radar employing orthogonal frequency-division multiplexing (OFDM) based signals of opportunity. The motivation behind this investigation is the surveillance aspect of the air trac management modernisation process currently taking place in civil aviation. To this end, the surveillance capability of the OFDM-based L-band digital aeronautical communication system type 1 (LDACS1) is analysed. The extension of the LDACS1 communication system towards surveillance is of great importance since it would enable an alternative, non-cooperative surveillance application, and, together with the already validated navigation extension, establish a fully integrated LDACS1-based communication, navigation, and surveillance technology. The modied Cramer-Rao bound on the joint estimation of target location and velocity for a non-coherent passive MIMO radar, employing the OFDM-based LDACS1 signals as signals of opportunity, is investigated. The analysis is carried out assuming one target, multiple and widely separated transmit and receive antennas, orthogonal waveforms, independent reection coecients, and zero-mean white Gaussian noise. Closed-form expressions for the relevant elements of the modied Fisher information matrix are obtained. The results can be used to assess the estimation accuracy of a multiple antenna passive radar system employing any OFDM-based signals of opportunity.
机译：在这项研究中，关注的是采用基于机会信号的正交频分复用（OFDM）的非相干无源多输入多输出（MIMO）雷达的可达到的估计精度。这项调查背后的动机是民航目前正在进行的航迹管理现代化过程的监视方面。为此，分析了基于OFDM的L波段数字航空通信系统类型1（LDACS1）的监视能力。 LDACS1通信系统向监视的扩展非常重要，因为它将启用替代的非合作监视应用程序，并与已经验证的导​​航扩展一起，建立完全集成的基于LDACS1的通信，导航和监视技术。研究了一种基于非OFDM无源MIMO雷达的目标位置和速度联合估计的修正Cramer-Rao界，该方法采用基于OFDM的LDACS1信号作为机会信号。该分析是在假设一个目标，多个发射天线和接收天线，分离的发射天线和正交波形，独立的系数以及零均值高斯白噪声的情况下进行的。获得修改后的Fisher信息矩阵相关元素的闭式表达式。结果可用于评估采用任何基于OFDM的机会信号的多天线无源雷达系统的估计精度。

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