Analysis and performance evaluation of a pilot-aided interpolated channel estimator for OFDM systems

Authors:
Athanasios Doukas;Grigorios Kalivas
Affiliations:
Department of Electrical and Computer Engineering, University of Patras Campus of Rion, Greece;Department of Electrical and Computer Engineering, University of Patras Campus of Rion, Greece
Venue:
Computers and Electrical Engineering
Year:
2010

Citing 3
Cited 1

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A comparison of pilot-aided channel estimation methods for OFDMsystems

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An adaptive compensation scheme-based coded direct detection optical-orthogonal frequency division multiplex (OFDM) system

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Abstract

In this paper, we propose a novel pilot-aided channel estimator through interpolation for Orthogonal Frequency Division Multiplexing (OFDM) systems that replaces part of the virtual subcarriers with pilot subcarriers (pilots) reducing the interpolation error while keeping the code rate stable. A novel thorough analysis of the Mean Square Error (MSE) of the proposed estimator is given for the general case where data subcarriers are positioned before the first and after the last pilot. Simulations show the improvement of the proposed scheme in MSE and Bit Error Rate (BER) when applied to a practical OFDM wireless local area network type of system with realistic channel conditions.