摘要
针对载波同步中频偏、相偏对扩频接收机性能的影响,提出一种大频偏下的载波同步算法。该算法分为两个步骤,首先在大频偏范围内进行预估计,将频偏进行粗略校正;然后再对剩余的频偏和相偏进行精确校正。该算法对采用非相干和相干接收方式的扩频通信机均适用。仿真结果表明此方法运算量小,同步精度高,适合于低成本嵌入式系统。
Considering the negative influence of frequency offset and phase offset in system synchronization,an improved DFE algorithm for carrier synchronization in the case of large carrier frequency offset is proposed.By this algorithm,the large-scale carrier frequency offset is estimated and revises in rough firstly,and then,the remainder frequency offset and phase offset are estimated and revised accurately.This algorithm suits with noncoherent/coherent receiver of spread spectrum communications.Simulation results show that,this algorithm is of low computing amounts and high synchronization accuracy.
出处
《西安邮电学院学报》
2011年第3期22-25,37,共5页
Journal of Xi'an Institute of Posts and Telecommunications
关键词
载波同步
频偏纠正
相偏纠正
扩频
carrier recovery
frequency offset correction
phase offset correction
spread spectrum
