| 摘要: |
| 介绍了低轨星载通信侦察的特点，针对侦察中多普勒变化率相对信号带宽较大时传
统技术无法跟踪和解调PSK信号的问题，提出一种基于改进的三阶锁相环的解调方法和实现
途径，并使用该方法研制了解调软件，在实际工程中进行了成功应用，满足了低轨卫星侦
察系统对该类信号解调的需求。 |
| 关键词: 低轨卫星 侦察系统 BPSK QPSK 解调 |
| DOI： |
|
| 基金项目: |
|
| A Demodulation Method Based on Third-order PLL for LEO Satellite Reconnaissance System |
| CHAO Jie-pin,LI Shen |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| The characteristics of satellite-based communication reconnais
sance is introduced.An improved demodulation method based on third-order phase
-locked
loop(PLL) is proposed to solve the problem that conventional technology cannot
track
and demodulate PSK signal when the Doppler changing rate is large relative to
signal bandwidth in reconnaissance.With this method,the demodulation software ha
s been developed and applied in practical engineering.This method meets the need
s of LEO(Low Earth Orbit) satellite reconnaissance system for signal demodulatio
n. |
| Key words: LEO satellite reconnaissance system BPSK QPSK demodulation |
《电讯技术》编辑部 