Energy-efficient channel estimation for MB-OFDM UWB system in presence of interferences

S. M. Riazul Islam, Kyung Sup Kwak

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

Interference reduces the performance of a correct data signal detection and decoding. This problem becomes severe when interferences exist during the period of channel estimation. This will destroy the accuracy of channel estimation and, will eventually result severe degradation in the performance of signal detection and decoding in the entire data packet/frame. In this article, we propose an improved channel estimation technique for multiband orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) system in presence of interferences. In particular, we work towards a preamble-based channel estimation technique in multi-access and narrowband interfering environments. We construct two preamble symbols with opposite, both in amplitude and phase, sequences in frequency-domain. Time-domain redundancy is introduced into these preamble symbols before transmission. Based on this time-domain redundancy property, we eliminate multi-access interference (MAI) through an adaptive select and replace (ASR) scheme. We show that the use of opposite sequences in preambles leads a simple addition, subtraction and compare (ASC) scheme to cancel narrowband interference (NBI). In addition, we apply a frequency-domain filter, driven by channel's power delay profile (PDP), to get a further enhancement in the estimation accuracy. Simulation results urge that our proposed technique outperforms the conventional channel estimation methods.

Original languageEnglish
Title of host publication2010 International Conference on Information and Communication Technology Convergence, ICTC 2010
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages149-154
Number of pages6
ISBN (Electronic)9781424498086, 9781424498079
ISBN (Print)9781424498062
DOIs
Publication statusPublished - 23 Dec 2010
Externally publishedYes
Event2010 International Conference on Information and Communication Technology Convergence - Jeju, Korea, Republic of
Duration: 17 Nov 201019 Nov 2010

Publication series

NameInternational Conference on Information and Communication Technology Convergence, ICTC
PublisherIEEE
ISSN (Print)2162-1233
ISSN (Electronic)2162-1241

Conference

Conference2010 International Conference on Information and Communication Technology Convergence
Abbreviated titleICTC 2010
Country/TerritoryKorea, Republic of
CityJeju
Period17/11/1019/11/10

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