MIMO OFDM Systems Based on the Optimal Fractional Fourier Transform

Authors:
Huiqi Wang;Hong Ma
Affiliations:
College of Mathematics, Sichuan University, Chengdu, China 610064;College of Mathematics, Sichuan University, Chengdu, China 610064
Venue:
Wireless Personal Communications: An International Journal
Year:
2010

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Abstract

Transmission over wireless time-varying channels can lead to inter-carrier interference (ICaI) and inter-cell interference (ICeI) in multiple-input multiple-output orthogonal frequency division multiplexing systems. In this paper, it is considered that each cell can search respective optimal order chirp basis to replace exponential basis to suppress ICaI, and optimal interference restricted combination equalizer based on the Fractional Fourier Transform is proposed to suppress ICeI. Furthermore, a novel equivalent channel estimation algorithm is used to improve system simulation efficiency. The simulation results demonstrate the effectiveness of proposed approach.