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An efficient framework to exploit frequency diversity in OFDM: precoding with adaptive subcarrier selection

Athaudage, Chandranath R; Wang, J; Jayalath, Anagiyaddage Dhammik

Description

We propose adaptive subcarrier selection (ACS) as an efficient technique of improving the error performance of grouped linear constellation precoding (GLCP) OFDM in the low-to-medium SNR range (0-20 dB). Recently, GLCP-OFDM has been proposed to achieve frequency diversity (multipath diversity) in OFDM overcoming the problem of channel nulls (deep fades in frequency-domain). In GLCP-OFDM, symbol precoding is performed on subgroups of OFDM subcarriers rather than on the total number of OFDM...[Show more]

dc.contributor.authorAthaudage, Chandranath R
dc.contributor.authorWang, J
dc.contributor.authorJayalath, Anagiyaddage Dhammik
dc.coverage.spatialHelsinki Finland
dc.date.accessioned2015-12-08T22:21:54Z
dc.date.available2015-12-08T22:21:54Z
dc.date.createdSeptember 11-14 2006
dc.identifier.isbn1424403308
dc.identifier.urihttp://hdl.handle.net/1885/32324
dc.description.abstractWe propose adaptive subcarrier selection (ACS) as an efficient technique of improving the error performance of grouped linear constellation precoding (GLCP) OFDM in the low-to-medium SNR range (0-20 dB). Recently, GLCP-OFDM has been proposed to achieve frequency diversity (multipath diversity) in OFDM overcoming the problem of channel nulls (deep fades in frequency-domain). In GLCP-OFDM, symbol precoding is performed on subgroups of OFDM subcarriers rather than on the total number of OFDM subcarriers which is large in practice. This reduces the receiver decoding complexity while maintaining the high SNR frequency diversity benefit - though the error performance in the low SNR regime is worse than a non-precoded system. In contrast, the proposed GLCP-ACS-OFDM improves the error performance in the low-to-medium SNR range without increasing the receiver complexity. Simulation results demonstrate the superior performance of GLCP-ACS-OFDM over GLCP-OFDM for a practical range of SNR as applicable to mobile wireless communications.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE Inc)
dc.relation.ispartofseriesIEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2006)
dc.sourceProceedings of the 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications
dc.subjectKeywords: Acoustic intensity; Communication; Communication satellites; Computer networks; Decoding; Frequency division multiplexing; Multitasking; Orthogonal frequency division multiplexing; Signal to noise ratio; Wireless telecommunication systems; Adaptive subcar
dc.titleAn efficient framework to exploit frequency diversity in OFDM: precoding with adaptive subcarrier selection
dc.typeConference paper
local.description.notesImported from ARIES
local.description.refereedYes
dc.date.issued2006
local.identifier.absfor090609 - Signal Processing
local.identifier.ariespublicationu3357961xPUB91
local.type.statusPublished Version
local.contributor.affiliationAthaudage, Chandranath R, National ICT Australia
local.contributor.affiliationWang, J, University of Melbourne
local.contributor.affiliationJayalath, Anagiyaddage Dhammik, College of Engineering and Computer Science, ANU
local.identifier.doi10.1109/PIMRC.2006.254299
dc.date.updated2015-12-08T08:39:29Z
local.identifier.scopusID2-s2.0-44949128870
CollectionsANU Research Publications

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