摘要
设计一种基于8PSK调制方案的锁频锁相器载波恢复环路,该环路由通用载波同步鉴相算法结合PFD算法,实现了大频偏的捕获和获得较小的稳态相位抖动。提出针对MPSK调制方案的PFD的两种加窗方法,选择较优的方案进行了性能仿真。结果表明,该载波恢复方案具有捕获频偏大、稳态相差小、稳定性高的特点,是一种非常适合于卫星通信的高速8PSK调制的载波恢复方案。
A phase and frequency detection carrier recovery loop based on 8PSK modulation scheme which combines universal carrier synchronization algorithm with PFD algorithm is designed for the realization of captureing large frequency offset and getting smaller steady phase jitter. Two windowing methods of the PFD for MPSK scheme are presented and the better one doing performance simulation is chosen. The results show that the carrier frequen- cy offset recovery program can capture large frequency offset, get small steady-state difference and high stability. The scheme is very suitable for high- speed satellite communications 8PSK modulate carrier recovery.
出处
《电视技术》
北大核心
2014年第9期184-187,196,共5页
Video Engineering
基金
国防基础研究项目(B3120133002)
关键词
载波恢复
8PSK
鉴频鉴相器
通用环
相位抖动
carrier recovery
8PSK
phase and frequency detection
universal carrier synchronization loop
phase jitter
