BPSK/QPSK系统突发通信半数据辅助载波恢复  

Semi-Data-Aided Carrier Recovery for BPSK/QPSK Burst Transmissions

作　　者：胡赟鹏[1] 刘波[1] 于宏毅[1] 胡捍英[1] 

机构地区：[1]信息工程大学信息工程学院,郑州450002

出　　处：《系统仿真学报》2009年第13期4063-4068,共6页Journal of System Simulation

摘　　要：针对突发通信系统在保证频率估计精度和频谱效率时存在的矛盾,给出了适用于BPSK和QPSK系统突发通信的半数据辅助(SDA)频率估计算法。根据给出的算法,已知的导频符号和未知的数据符号被同时用于频率估计,使得频率估计精度和系统频谱效率均能得到较好的保证。仿真表明,在较高信噪比下,使用较少的导频符号,半数据辅助频率估计算法的性能就能接近使用更多导频符号的CRLB。Semi-data-aided （SDA）frequency estimators for BPSK and QPSK systems were proposed respectively in order to deal with the conflict between frequency estimation accuracy and spectral efficiency for burst-mode transmission systems. According to the algorithms, known pilot symbols and unknown data symbols were used together so that both estimation accuracy and spectral efficiency could be satisfied well. The simulation results show that the SDA estimators, which only use fewer pilot symbols, can provide a very good performance close to the CRLB with a large number of pilot symbols at moderately high signal-to-noise ratios.

关 键 词：半数据辅助 频率估计 突发通信 BPSK QPSK 

分 类 号：TN92[电子电信—通信与信息系统]