雷达对扩频通信系统干扰仿真与分析

针对传统雷达电磁辐射干扰分析方法的不足,首先在时域符号级详细分析了雷达对扩频通信系统电磁辐射干扰的机理,推导得出扩频通信系统在脉冲雷达干扰下的误码率公式和曲线;然后利用建立的雷达电磁干扰仿真模型,对扩频通信系统采用不同扩频因子以及不同频率隔离度时的受扰性能进行了仿真分析,其结果与理论分析结果较为吻合。最后利用所得结论计算给出了微波频段5种典型雷达与扩频通信系统的频率-距离隔离关系。研究结果证明,本方法能在更深层次上揭示雷达辐射干扰的本质,提高频谱利用效率。

Simulation analysis on the interference of radar to spread spectrum communication system

The shortages existed in conventional analysis method of radar radiated interference are pointed out, then the electromagnetic interference mechanisms of radars to spread spectrum communication system are analyzed based on time-symbol level. The error bit rate formulae and curves of spread spectrum communication system under the pulse radars interferences are deduced. The interference performance of pulse radar to spread spectrum communication system is simulated by the radar electromagnetic interference model, whose results accord well with the theoretical analysis results. The frequency-distance relationship between five general radars and spread spectrum communication system in microwave bands is calculated. The conclusion indicates that this interference analysis method can reveal the interference essence of radar and improve the frequency utilization efficiency.