Power allocation of distributed space-frequency coding for OFDM-based hybrid relay selection

Sileh, Ibrahim Khalil and Xiang, Wei and Maxwell, Andrew (2013) Power allocation of distributed space-frequency coding for OFDM-based hybrid relay selection. In: 7th International Conference on Signal Processing and Communication Systems (ICSPCS 2013), 16-18 Dec 2013, Gold Coast, Australia.

Abstract

Cooperative communications in conjunction with orthogonal frequency division multiplexing (OFDM) has recently emerged as a promising technique to mitigate multi-path fading and provides high spectral efficiency in broadband wireless communications systems. In this paper, we investigate resource allocation of an OFDM modulation scheme combined with distributed space-frequency codes (DSFC) based upon a hybrid relay selection protocol. The optimum problem is divided into two suboptimal problems. The first one is to optimize the power allocation between the source and relay nodes under a sum power constraint. Then the relay power is optimized for the selected relay nodes according to the channel power gain of the second time slot. Simulation results show that a substantial improvement in terms of bit error rate (BER) and capacity performance can be achieved in comparison with conventional relaying protocols.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright 2013 IEEE. Published version restricted in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 23 Mar 2014 02:35
Last Modified: 07 Apr 2015 23:57
Uncontrolled Keywords: Alamouti code; DSFC; hybrid relay protocol; OFDM; power allocation
Fields of Research : 09 Engineering > 0906 Electrical and Electronic Engineering > 090609 Signal Processing
10 Technology > 1005 Communications Technologies > 100502 Broadband and Modem Technology
Socio-Economic Objective: B Economic Development > 89 Information and Communication Services > 8901 Communication Networks and Services > 890199 Communication Networks and Services not elsewhere classified
Identification Number or DOI: 10.1109/ICSPCS.2013.6723943
URI: http://eprints.usq.edu.au/id/eprint/24062

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