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Adaptive MCS Selection in OFDM Systems Based on Channel Frequency Coherence

Lookup NU author(s): Dr Charalampos Tsimenidis, Professor Bayan Sharif, Dr Stephane Le Goff

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Abstract

This paper presents a joint adaptive modulation and coding (AMC) scheme, which exploits the coherence bandwidth of the wireless channel to divide the transmitted frame into independent sub-channels that correspond to the channel coherence bandwidth. This strategy is implemented for orthogonal frequency division multiplexing (OFDM) systems with channel state information (CSI) feedback. Low density parity check (LDPC) codes are utilized for encoding by employing signal-to noise ratio (SNR) dependent coding rates, as well as distinct modulation schemes to achieve adaptivity to time-varying channel conditions. The performance of the proposed system was tested on Rayleigh fading channels that exhibit frequency coherent bands. Numerical results obtained via simulation demonstrate that the throughput of the proposed system and bit error rate (BER) performance are better than previously suggested approaches.


Publication metadata

Author(s): Al-Janabi MS, Tsimenidis CC, Sharif BS, Le Goff SY

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 5th Advanced International Conference on Telecommunications (AICT 09)

Year of Conference: 2009

Pages: 177-182

Publisher: IEEE

URL: http://dx.doi.org/10.1109/AICT.2009.37

DOI: 10.1109/AICT.2009.37

Library holdings: Search Newcastle University Library for this item

ISBN: 9781424438402


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