单通道数字跟踪接收机的设计

Design of a Digital Tracking Receiver with Single-channel

针对卫星通信中的天线跟踪系统,研制了一种新的通用数字跟踪接收机。重点介绍了单通道单脉冲数字跟踪接收机工程设计上的几个问题,主要有单通道合成考虑、A/D转换的插入点和动态范围、线极化的自适应相位跟踪、解调终端硬件设计等的几个方面给出了工程实际设计的考虑,最后给出了解调终端的几项关键指标。新设计的跟踪接收机硬件上兼容圆锥扫描接收机和电子波束偏转接收机,达到了通用化的设计目的。

novel digital tracking receiver is proposed based on the ground station auto-tracking antenna system in satellite commu- nication.This paper describes design consideration of the digital SCM receiver,including some critical issues like synthesizing of single channels,the sample frequency and extendibility dynamic scope of A/D,auto phase correction followed the change of linear polarization angle, graphical design of the error single demodulation module, etc. Finally, several key specifications of manufacturing equipment are introduced.The new receiver is compatible with conical scanning demodulation and electronic beam squint demodulation, achieving the purpose of full compatibility.