一种窄波束信号的快速捕获方法

为了适应飞行器不断提高的作用距离和越来越大的动态,采用Ka频段进行飞行器测控是未来的发展方向,但是Ka频段在提供增益的同时增加了信号的捕获难度。针对Ka频段天线波束窄和目标动态大的问题,设计出了一种空间信号快速搜索方法和低信噪比下信号多普勒频率捕获方法。给出了空间目标搜索和多普勒频率捕获的理论分析,并进行了模型仿真。仿真结果表明该方法可以在Eb/N0=0 dB时完成空间目标搜索和多普勒频率快速捕获。

A Fast Capture Method of Narrow Beam Signal

For the adaptation to the increasingly raised distance and speed of aircraft,the adoption of Ka-band TT＆C system for aircraft control becomes the trend of future development.However,Ka-band would add difficulties to the capture of the signal while providing performance gains.So aiming at the problems such as narrow beam and high dynamic environment of the communication in ka-band,a new method for space signal search and doppler frequency capture is proposed and designed.Theoretical analysis and simulation results show that this method is effective and could work well at Eb/N0=0 dB.