Linearly Time-varying Channel Estimation with Low Complexity Iterative ICI Cancellation in OFDM Systems

摘要

A Linearly Time-varying (LTV) channel estimation model with Inter-caxrier Interference (ICI) mitigation is proposed for Orthogonal Frequency Division Multiplexing (OFDM) systems in this paper. The proposed method utilizes an iterative procedure with lower complex ICI calculation to mitigate ICI in time-varying channel estimation. It can evidently reduce the complexity of conventional iterative methods for ICI mitigation which has to find invert of matrix. Simulation results show that the proposed method reaches a compromise between complexity and estimation accuracy. It has approximative performance with conventional iterative methods while reducing the complexity, and obtains lower estimation deviation than typical LTV model without iterative procedure.