Fast Fading Channel Estimation for OFDM Systems with Complexity Reduction

• 作者: ZHANG Chen LI Dan
• 来源期刊: 电子学报（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: TELECOMMUNICATIONS
• 页码范围: 1173-1177
• 页数: 5页
• 语种: 英文
• DOI: 10.1049/cje.2021.07.023

摘要

Channel estimation plays a significant role in the Inter-carrier interference (ISI) mitigation and symbol detection in Orthogonal frequency division multiplexing (OFDM) systems. As the speed of mobile terminal increases, the channel changes rapidly, causing fast fading which will degrade the system performance. In this paper, a low complexity fast fading channel estimation method suited for scattered pilot OFDM systems is proposed. This method is characterized by estimating channel matrix directly in the frequency domain, which can significantly reduce the channel estimation complexity with good system performance. Simulation results verify its superiority over the existing estimation methods.