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MIMO OFDM channel estimation based on RLS algorithm: the time- versus frequency-domain implementations


Citation

Hezam, Mohammed Abdo Saeed and Mohd Ali, Borhanuddin and Khatun, Sabira and Noordin, Nor Kamariah and Ismail, Mahamod (2007) MIMO OFDM channel estimation based on RLS algorithm: the time- versus frequency-domain implementations. In: 2007 Asia-Pacific Conference on Communications, 18-20 Oct. 2007, Bangkok, Thailand. (pp. 547-550).

Abstract

In this paper, exponentially-weighted recursive least squared (EW-RLS) channel estimation for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems is investigated. Channel estimation in time-domain (TD) as well as frequency-domain (FD) is investigated through exploiting preambles and pilot symbols inserted in TD and FD, respectively. The channel is assumed to be slowly time-varying frequency-selective, constant during one OFDM symbol but changing from symbol to symbol. Simulation results show that the TD EW-RLS estimator has better estimation performance in terms of the mean-squares error (MSE) and bit-error rate (BER), compared to FD EW-RLS estimation approach. The computational complexity is significantly reduced by recursively updating the channel estimates and by applying the matrix inversion lemma.


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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1109/APCC.2007.4433546
Publisher: IEEE
Keywords: Channel estimation; Time-domain (TD); Frequency-domain (FD); MIMO; OFDM; Exponentially-weighted recursive least squared (EW-RLS)
Depositing User: Nabilah Mustapa
Date Deposited: 14 Jul 2016 02:20
Last Modified: 14 Jul 2016 02:20
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1109/APCC.2007.4433546
URI: http://psasir.upm.edu.my/id/eprint/47667
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