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Blind Subspace Channel Estimation in MIMO-OFDM Systems with Few Received Blocks

Authors:
Jung-Lang Yu
Po-Ting Chen
Wan-Ru Kuo

Keywords: MIMO-OFDM; blind subspace channel estimation; Toeplitz; AIC; MDL.

Abstract:
In this paper, the blind subspace channel estimation using the block matrix scheme is proposed for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Based on the Toeplitz structure, the block matrix scheme collects a group of the received OFDM symbols into a vector, and then partitions it into a set of equivalent signals. The number of equivalent signals is about N times of OFDM symbols, where N is the size FFT operation. The proposed blind subspace channel estimation can converge within a small amount of OFDM symbols. Besides, the semi-blind channel estimation is also examined by combining few pilot sequences with the subspace method. Simulation results show that the proposed blind and semi-blind algorithms outperform the compared methods.

Pages: 6 to 12

Copyright: Copyright (c) IARIA, 2012

Publication date: June 24, 2012

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-203-5

Location: Venice, Italy

Dates: from June 24, 2012 to June 29, 2012