一种基于DSP技术的信标光跟踪系统研究

针对目前星地光通信链路建立所急需解决的三大难题,远距离通信、强实时处理和高准确度光束对准,搭建了以DSP（TMS320DM642）为核心处理器,结合CCD、视频解码芯片、SDRAM等外围资源的小型移动平台间信标光跟踪系统,给出了系统的设计原理.根据卫星变速运动的特点,提出了一种最小二乘法的阶数自适应选取算法,对卫星运动轨迹进行动态模拟预测.结果表明,该系统能应用于复杂运动状态下的目标跟踪.

A Beacon Tracking System Based on DSP Technology

The establishment of satellite-ground laser link faces three problems nowadays,which are long distance communication,real-time processing and high precision pointing.To solve these problems,a beacon tracking system was presented,which adopted DSP(TMS320DM642) as core processor,combining with CCD,video decoder chip,SDRAM,and peripheral circuits.The design principle of the system was also proposed.According to the variable-speed motion of the satellite,an adaptive rank selection algorithm based on the least mean square(LMS) method was introduced to dynamically predict the simulated satellite movement.The results show that the method can trace target under the complex conditions.