标题: | 利用Histogram实现正交分频多工系统资料辅助时间讯号同步演算法 A NEW DATA-AIDED OFDM SYMBOL TIMING SYNCHRONIZATION ALGORITHM BASED ON HISTOGRAM PROCESSING |
作者: | 许胜毅 Sheng-Yi Hsu 桑梓贤 Tzu-Hsien Sang 电子研究所 |
关键字: | 正交分频多工系统时间讯号同步,长条图;OFDM, Symbol Timing, Histogram |
公开日期: | 2004 |
摘要: | 一个新的资料协助符号同步演算法需要完成兩个目标:有更好的稳定度和有效降低计算量。而一个直接的想法來自于讯号在时域的偏移会造成正交分频多工系统信号中的每个子载波在星座图上的角度偏移,这也正是此演算法的中心思想所在。再利用histogram的演算法从快速傅立葉转换的结果中用來寻找此时域偏移以节省复杂的计算量,其中也利用许多模拟來验证这个新的演算法的效率及可靠度。 I A new data-aided OFDM symbol timing synchronization method is developed with two goals in mind: to achieve robust performance and to reduce computational cost. It is the intuitive observation of the relationship between the symbol timing shift and the constellation rotation on each subcarrier of an OFDM symbol from which the new method is developed. A histogram-based algorithm is used to extract the timing shift information from the FFT output. Simulations are conducted to verify the effectiveness and robustness of this new algorithm. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009211677 http://hdl.handle.net/11536/67534 |
显示于类别: | Thesis |
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