天空双基地雷达体制分析及参数设计

System analysis of space-based bistatic radar and its parameter design

鉴于天空双基地雷达在兼顾单基地天基预警雷达的优势的同时能克服其信噪比偏低的缺点,在单基地天基预警雷达的基础上,对天空双基地雷达的几何模型、雷达距离方程及相关概念等方面进行了分析.然后综合考虑信号衰减、接收信噪比以及距离模糊等方面因素,对系统的载频、卫星轨道高度和脉冲重复频率等参数进行了设计.最后进行了仿真验证.理论分析和仿真结果表明:信号信噪比能达到可检测水平,且无距离模糊.

Considering that the space-based bistatic radar （SBBR） could hit off a fault of the lower SNR while owning the advantages of single base space-based early warning radar, this paper analyzes a geometric model, radar range equation and other related conception of the SBBR, based on the single base space-based early warning radar, designs the system’s carrier frequency, the altitude of satellite orbit, the pulse repetition frequency and other parameters by considering overall the factors of signal decaying, SNR of reception, range ambiguity and others, and finally performs the simulation and verification. By theoretical analysis and simulation results, it is shown that the required signal SNR can be up to the detectable level without range ambiguity.