Efficient Implementation of Complementary Golay Sequences for PAR Reduction and Forward Error Correction in OFDM-based WLAN systems

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dc.contributor.author Gil-Jiménez, Víctor P.
dc.contributor.author Fernández-Getino García, María Julia
dc.contributor.author García-Armada, Ana
dc.contributor.author Sánchez-Fernández, Matilde
dc.date.accessioned 2012-05-16T07:10:42Z
dc.date.available 2012-05-16T07:10:42Z
dc.date.issued 2008-10
dc.identifier.bibliographicCitation AEÜ - International Journal of Electronics and Communications / Archiv für Elektronik und Übertragungstechnik, vol. 62, issue 9 (Oct. 2008), pp. 683-694
dc.identifier.issn 1434-8411
dc.identifier.uri http://hdl.handle.net/10016/14269
dc.description.abstract In this paper the use of complementary Golay sequences (CGS) for peak-to-average power ratio (PAR) reduction and forward error correction (FEC) in an orthogonal frequency division multiplexing (OFDM)-based wireless local area network (WLAN) system is explored; performance is examined and complexity issues are analyzed. We study their PAR reduction performance depending on sequence lengths and we have found that, for the case that the number of sub-carriers differs from the sequence length, some interesting relationships can still be stated. Regarding their error correction capabilities, these sequences are investigated considering M-PSK constellations applied to the OFDM signal specified in IEEE 802.11a standard. Computational load for both Golay encoding and decoding processes is addressed and we provide an exhaustive analysis of their complexity. In order to overcome memory restrictions and speed up algorithmic operations, a novel algorithm for real-time generation of the Golay Base Sequences is proposed and evaluated giving as a conclusion that these sequences can be real-time generated with actual Digital Signal Processors (DSP). Our proposal lies on an efficient permutation algorithm that obtains the current permutation without the need for generating previous ones. Its complexity is calculated and turns out to be significantly low; the advantages are specially appreciated at the decoding stage. We also introduce a hybrid solution to get a trade-off between complexity and memory requirements. Moreover, the whole system is also implemented in a DSP to validate the proposal in a prototype, where its feasibility has been confirmed.
dc.description.sponsorship This work has been partly funded by the Spanish government with projects MACAWI (TEC 2005-07477-c02-02) and MAMBO (UC3M-TEC-05-027).
dc.format.mimetype text/plain
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.rights © Elsevier GmbH
dc.subject.other OFDM
dc.subject.other Complementary Golay sequences
dc.subject.other PAR reduction
dc.subject.other WLAN
dc.subject.other FEC
dc.subject.other Permutation generation
dc.title Efficient Implementation of Complementary Golay Sequences for PAR Reduction and Forward Error Correction in OFDM-based WLAN systems
dc.type article
dc.relation.publisherversion http://dx.doi.org/10.1016/j.aeue.2007.09.003
dc.subject.eciencia Telecomunicaciones
dc.identifier.doi 10.1016/j.aeue.2007.09.003
dc.rights.accessRights openAccess
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 683
dc.identifier.publicationissue 9
dc.identifier.publicationlastpage 694
dc.identifier.publicationtitle AEÜ - International Journal of Electronics and Communications / Archiv für Elektronik und Übertragungstechnik
dc.identifier.publicationvolume 62
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