| 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。 |
| 关键词: TD-LTE 正交频分复用 频偏估计 相关 旋转因子 |
| DOI： |
|
| 基金项目:国家科技重大专项资助项目(2009ZX03002-009) |
|
| An efficient improved algorithm for carrier frequency offset estimation in TD-LTE system |
| CHEN Fa-tang,TENG Wang,LI Xiao-wen |
| () |
| Abstract: |
| In view of the importance of frequency offset estimation in the downl
ink process in TD-LTE system, proposed an improved method is proposed to jointly
estimate fr
action carrier frequency offset and integral carrier frequency offset in time do
main through auto-correct by rotation factor. The received signal is correlated
after carrier frequency offset compensation in limited range,and the carrier
frequency offset is determined according to the peak value of correlation power.
Simulation re
sults demonstrate that the proposed algorithm can improve the reliance and compl
exity in comparison with the normal methods and it has significance for referenc
e. |
| Key words: TD-LTE OFDM frequency offset estimation correlation rotation factor |
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