Modified Symbol Timing Offset Estimation for OFDM over Frequency Selective Channels
Modified Symbol Timing Offset Estimation for OFDM over Frequency Selective Channels
复制标题
DOI：
10.1109/vetecf.2011.6093032
复制
发表时间：
2011-12
期刊：
影响因子：
--
通讯作者：
Qi Wang;M. Simko;M. Rupp
中科院分区：
文献类型：
--
作者：
Qi Wang;M. Simko;M. Rupp
研究了频率选择性衰落环境下OFDM系统的符号定时问题。提出了一种改进的基于能量转移度量的符号定时偏差估计器。该度量还可以应用于估计最大信道延迟扩展。利用最大信道延迟扩展的知识，改进的估计器在相对低的信噪比范围内显示出其优势。与原算法相比，改进后的算法能够在较低的信噪比范围内正确捕获符号定时。
This paper deals with the symbol timing issue of an OFDM system in frequency selective fading scenarios. A modified symbol timing offset estimator based on an energy transition metric is proposed. This metric can also be applied to estimate the maximum channel delay spread. Benefiting from the knowledge of the maximum channel delay spread, the modified estimator shows its advantage in a relatively low SNR regime. Compared to the original, the modified algorithm is able to acquire the symbol timing correctly in a relatively low SNR region.