摘要
鉴于TD-LTE系统下行同步过程中频偏估计模块的重要性,提出了一种利用旋转因子校正的改进方法,在时域联合估计小数频偏和整数频偏,对接收信号在有限频偏范围内进行频偏补偿后做相关,根据相关能量峰值确定频偏大小。仿真结果表明,该算法无论是在可靠性还是在复杂度的降低上较常规算法都有很大提高,具有一定的参考价值。
In view of the importance of frequency offset estimation in the downlink process in TD - LTE system, proposed an improved method is proposed to jointly estimate fraction carrier frequency offset and integral carrier frequency offset in time domain through auto- correct by rotation factor. The received signal is correlated after cartier frequency offset compensation in limited range, and the carrier frequency offset is determined according to the peak value of correlation power. Simulation results demonstrate that the proposed algorithm can improve the reliance and complexity in comparison with the normal methods and it has significance for reference.
出处
《电讯技术》
北大核心
2012年第4期483-487,共5页
Telecommunication Engineering
基金
国家科技重大专项资助项目(2009ZX03002-009)~~
