A Joint OFDM Channel Estimation and ICI Cancellation for Double Selective Channels

Authors:
Qi Jiang;Joachim Speidel;Chunming Zhao
Affiliations:
Institute of Telecommunications, University Stuttgart, Stuttgart, Germany and National Mobile Communications Research Lab, Southeast University, Nanjing, China;Institute of Telecommunications, University Stuttgart, Stuttgart, Germany;National Mobile Communications Research Lab, Southeast University, Nanjing, China
Venue:
Wireless Personal Communications: An International Journal
Year:
2008

Citing 0
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Abstract

Orthogonal frequency division multiplexing (OFDM) systems suffer significantly from inter-carrier interference (ICI) caused by double selective channels. In this paper, we develop a two-stage hybrid channel estimation and ICI cancellation structure for OFDM. The double selective channels are approximated by an improved Basis Expansion Model (BEM), which is more accurate than the conventional BEM when the normalized Doppler frequency is smaller than one. Based on this improved model, a new ICI cancellation scheme is proposed to reduce ICI impact. Simulation results show that the framework performs well.