一种基于伪频偏的载波恢复算法

An algorithm for carrier recovery based on thefalse frequency offset

推导并分析了频偏、相偏对通信系统的影响,提出了一种新的基于伪频偏概念的载波恢复算法.该算法首先估计大频偏范围内可能的几个频偏值,然后去除其中的伪频偏,最终得到真实的频偏值,以达到纠正大频偏的目的.该算法同时还利用一种快速相偏估计方法对相偏进行了估计和校正.仿真表明载波恢复算法运算量小,能够实现快速恢复载波.

The influences of frequency offset and phase offset on communications are discussed, and then a novel algorithm for recovering the carrier based on the false frequency offset is presented. The proposed algorithm estimates several possible frequency offset values in a wide frequency offset range, and then obtains the true frequency offset value by the false frequency offset elimination method. The novel carrier recovery algorithm also estimates and corrects phase offset by a fast phase offset estimate method. Simulation results show the algorithm is less expensive computationally in recovering the carrier.