用并行内插算法恢复宽带信号的定时信息

摘要

提出了一种卫星高速数传的定时恢复方法,以解决实现复杂、硬件依赖性强的问题.以固定采样钟为基础,利用误差信号对多路数据排序筛选,并行内插实现定时信息的恢复,支持GHz宽带变速率信号的同步.硬件仿真结果表明,该方法的解调损失不超过1 dB.采用该方法的高速接收机可工作在统一平台上,使卫星测控通信地面资源配置更加灵活.%A timing recovery scheme is proposed for high-rate satellite data transmission. Compared with typical schemes,it has simple structure and doesn't depend on special hardware. The solution works at a fixed sampling clock. Timing-error detector is utilized to sort and screen data distributed in multiple branche,and timing information is recovered by parallel interpolation. It can synchronize a variety of band-width signals up to gigahertz. Hardware simulation results show the demodulation loss is no less than 1 dB. Digital receivers using such scheme can work on uniform platforms,which makes the ground resource distri-bution of satellites tracking,telemetry and command( TT&C) and communication systems more flexible.