摘要： 提出一种基于信道冲击响应的正交频分复用系统精细同步方法，在非理想同步情况下，利用可抑制能量泄漏的修正迭代最小二乘信道估计信道冲击响应，并对估计结果进行定时，同时介绍基于信道冲击响应的窗函数。仿真实验结果表明，该方法能够克服传统相关方法定时滞后的缺点，且获得较高的估计精度。
关键词:
正交频分复用,
定时同步,
信道冲击响应
Abstract: A fine synchronization method for Orthogonal Frequency Division Multiplexing(OFDM) based on Channel Impulse Response (CIR) is proposed. CIR is estimated by Least Square(LS) channel with suppressing the effect of energy leakage under non-ideal synchronization, and the estimation result is timed. The window function based on CIR is also introduced. Simulation experimental results show this method can overcome the demerits of time lags for traditional relevant methods, and achieve higher estimation accuracy.
Key words:
Orthogonal Frequency Division Multiplexing(OFDM),
time synchronization,
Channel Impulse Response(CIR)
中图分类号:
刘广宇;李明齐;林华乐;杨 曾;卜智勇;. 基于信道冲击响应的OFDM精细同步方法[J]. 计算机工程, 2009, 35(14): 25-27.
LIU Guang-yu; LI Ming-qi; LIN Hua-le; YANG Zeng; BU Zhi-yong;. Fine Synchronization Method for OFDM Based on Channel Impulse Response[J]. Computer Engineering, 2009, 35(14): 25-27.