Open AccessFast Fading Channel Estimation for OFDM Systems with Complexity Reduction
Author(s) -
Chen ZHANG,
Dan LI
Publication year - 2021
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2021.07.023
Subject(s) - fading , orthogonal frequency division multiplexing , computer science , channel (broadcasting) , interference (communication) , reduction (mathematics) , frequency domain , electronic engineering , channel state information , algorithm , telecommunications , mathematics , wireless , engineering , geometry , computer vision
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.