一种基于区域凝视的星载波束合成方法

A Space-borne Beam Forming Method based on Area-Staring

对基于区域凝视的波束合成原理进行理论分析,推导了地面目标信号到卫星天线阵入射角度的计算公式,并结合具体应用提出了一种模拟波束合成和数字波束合成相结合的波束合成方法,同时仿真了模拟波束合成和数字波束合成前后的增益对比、信噪比等高线的覆盖情况,最终根据仿真结果给出了对应的波束切换控制方法。通过对目标区域的持续凝视,提升了目标位置的信号增益,为解决目标区域内微弱信号的接收提供了一些技术参考,具有较强的工程使用价值。

Theoretical analysis is done on the beam forming principle based on area-staring,and the formula for calculating the angle of incidence from ground target signal to the satellite is deduced.And combined with specific applications,a beam forming method combining analog beam forming and digital beam forming is proposed.Simultaneously the gain comparison before and after the analog beam forming and digital beam forming,and the coverage of the SNR contour are simulated,and finally the corresponding beam switching control method is given according to the simulation results.By continuously gazing at the target area,the signal gain of the target location is improved,and some technical reference is provided for the reception of weak signals in the target area,which has strong engineering value.