分布式相参雷达(DCR)全相参模式相参性能的监控是一个重要问题。该文提出的两个监控算法均通过监控信噪比(SNR)增益来监控相参性能。SNR增益需要统计单路波形的SNR, 难点也在于此。第一个监控算法针对单发射多接收天线(单发多收)体系,单路波形可以从单个接收天线直接获得,进而统计SNR增益。第二个监控算法针对多发单/多收体系,由于全相参模式下各发射天线的基带波形相同,因此多个发射天线的波形在单个接收天线处是叠加在一起的,无法用匹配滤波方法分离出单路波形,该文提出了辅助天线技术从而可以监控SNR增益。数值仿真表明了两种监控算法的有效性。

Monitoring the coherence of the fully coherent mode of distributed coherent radar (DCR) is an important problem. Two algorithms are given to monitor the coherence based on the signal-to-noise ratio (SNR) gain. The first algorithm was designed for architectures with one transmitter and multiple receivers, where a one way waveform can be obtained directly from any receiver to monitor the SNR gain. The second monitoring algorithm was designed for architectures with multiple transmitters and one or multiple receivers, where the baseband signals of all the transmitters are the same, so all received signals at any receiver are superposed together and a one way waveform cannot be obtained by matched filtering. An auxiliary antenna technique is given to monitor the SNR gain with numerical simulations showing that the two algorithms are in general effective.