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Interference resistance of adaptive multiuser detection in asynchronous detect and forward relaying CDMA networks

Interference resistance of adaptive multiuser detection in asynchronous detect and forward relaying CDMA networks

Qureshi, Athar, Kanakis, Triantafyllos and Rapajic, Predrag (2011) Interference resistance of adaptive multiuser detection in asynchronous detect and forward relaying CDMA networks. 2011 Baltic Congress on Future Internet Communications (BCFIC Riga 2011). IEEE Explore, Piscataway, NJ, USA, pp. 90-95. ISBN 9781424485116 (doi:10.1109/BCFIC-RIGA.2011.5733225)

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Abstract

The uplink of an asynchronous Detect and Forward CDMA wireless network interference tolerance is investigated in this paper where relays and base station use Adaptive Multiuser Detection to detect incoming signals. Relays exchange data and channel information with the base station to achieve diversity gains. Due to non orthogonality of random spreading waveforms, Multiple Access Interference occurs, at both the relays and base station. In order to mitigate Multiple Access Interference, Adaptive Multiuser detection is been used by fractionally spaced linear transversal bank of filters. It is shown that Adaptive Multiuser Detection enables asynchronous cooperative communications while it is extremely effective with mitigating channel interference. It is also shown that the BER and Capacity performance of the scheme proposed in this paper is arbitrarily close to non linear MLSE theoretical upper bound results in a channel interference free operation. However, in the presence of channel interference our scheme outperforms the theoretical upper bound approach by nearly 9 dB at a BER of 10−3 and by 17 bits/s/Hz in Capacity at a SNR of 30dB.

Item Type: Book Section
Additional Information: Paper presented at the 2011 Baltic Congress on Future Internet Communications (BCFIC Riga), held from 16-18 Feb. 2011 in Riga, Latvia. INSPEC Accession Number: 11875800
Uncontrolled Keywords: adaptive multiuser detection, multiuser interference,
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments: School of Engineering
School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:
Last Modified: 14 Oct 2016 09:15
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/5746

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