DFT-Based on Mahalanobis Distance Discriminant Analysis Method Channel Estimation Algorithm for OFDM Systems

Abstract:

An enhanced discrete Fourier transform DFT-based channel estimation for OFDM systems is proposed. Conventional DFT-based channel estimations improve the performance by suppressing time domain noise. However, they potentially require information on channel impulse responses and may also result in mean-square error (MSE) floor due to incorrect channel information such as channel delay spread. In order to overcome the disadvantage, our proposed channel estimation can improve the performance by deciding significant channel taps adaptively. Significant channel taps are detected on the basis of Mahalanobis distance discriminant analysis. Simulation results demonstrate that the proposed algorithm outperforms the conventional DFT-based estimation in terms of BER and MSE performance.

• Periodical: Applied Mechanics and Materials (Volumes 55-57)
• Pages: 472-477
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.55-57.472
• Online since: May 2011
• Authors: Tong Liang Fan, Min Jun Deng, Hong Cheng Huang
• Keywords: Channel Impulse Response (CIR), DFT-Based Channel Estimation, Mahalanobis Distance Discriminant Analysis, Orthogonal Frequency Division Multiplexing (OFDM)

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