| 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。 |
| 关键词: 测控通信；全数字接收机；宽带信号；定时恢复 高速数传 并行内插 |
| DOI：10.3969/j.issn.1001-893x.2017.08.018 |
|
| 基金项目: |
|
| A parallel interpolation scheme for wideband signal timing recovery. |
| LIU Jingyuan,WANG Lei,WANG Xianping |
| (Southwest China Institute of Electronic Technology，Chengdu 610036，China;Beijing Space Information Relay and Transmission Technology Research Center，Beijing 100094，China) |
| Abstract: |
| 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 bandwidth 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 distribution of satellites tracking,telemetry and command(TT&C) and communication systems more flexible. |
| Key words: TT&C and communication all digital receiver wideband signal timing recovery high-rate data transmission parallel interpolation |
