基于干涉仪的扩频雷达多通道时分复用技术

Time-Domain Multiplexing of Spread Spectrum Radar Based on Phase Interferometer

在基于多基线相位干涉仪的扩频测向雷达系统中,多通道间的增益与相位差异以及不同环境下群时延变化特性差异一直是测量误差的主要来源。多通道时分复用技术通过最大限度共用接收通道降低通道差异导致的测量误差;同时,合理分配各通道时隙,采用多时隙信号相干积累的办法兼顾动态跟踪能力和测量精度。相比传统的多通道接收系统,该方法提高了测量精度,降低了硬件复杂度与系统成本,体积与功耗均进一步降低。

In spread spectrum direction-finding radar receiving system based on multi-baseline phase interferometer, the main sources of measuring error include the amplitude unbalance, phase unbalance between multi-channels and the group delay characteristics under different environments. The muhi-channel time-division multiplexing reduces measuring error by maximum shared receiving channels. In addition, rational distribution of the channel time slot and coherent integration can compromise the dynamic tracking performance and measuring precision. Comparing with traditional multi-channel receiving system, this method not only improves the measuring precision, but also reduces the hardware complexity and the system cost. Furthermore, the system volume and power are decreased greatly.