一种新的基于导频簇方案的时变OFDM系统双重ICI消除算法

A Novel Dual ICI Cancellation Algorithm Based on Grouped Pilot in OFDM System

摘要: 主要研究了正交频分复用(OFDM)系统基于线性时变(LTV)模型的子载波间干扰(ICI)消除算法。在LTV模型中采用双重ICI消除算法可以达到比较好的性能,然而由于导频处的估计值准确度有限,限制了算法性能的进一步提升。提出了一种基于导频簇方案的双重ICI消除算法,采用基于导频簇的梳状导频结构,大幅降低导频处的ICI影响,取得了较好的效果。

Abstract: This paper considered the LTV model-based ICI cancellation algorithm for OFDM system. Although the dual ICI cancellation algorithm can achieve a better performance in LTV model, the estimation error on pilot subcarriers restricts the improvement of algorithm performance. This paper proposed a grouped pilot-based dual ICI cancellation algorithm. By adopting comb pilot construction, the proposed algorithm can effectively reduce the influence of ICI to pilot.