Outage probability of unequal block-based OFDM amplify-and-forward relay protocol over wideband channels

Sileh, Ibrahim Khalil and Xiang, Wei and Alajel, Khalid Mohamed (2012) Outage probability of unequal block-based OFDM amplify-and-forward relay protocol over wideband channels. In: 12th International Symposium on Communications and Information Technologies (ISCIT 2012), 2-5 Oct 2012, Gold Coast, Australia.


In this paper, we consider a dual-hop multiplerelay network with orthogonal frequency division multiplexing (OFDM) based Amplify-and-Forward (AF) relay protocol over frequency-selective channels. In practice, subcarriers suffered that suffer deep fade in one relay may have good channels available for another relay. Therefore, each relay can support a different number of subcarriers. We propose an unequal blockbased OFDM-AF relaying scheme. In our scheme, an OFDM symbol is divided into unequal blocks of subcarriers at its destination. The destination assigns each relay a corresponding number of subcarriers depending on the signal-to-noise ratio (SNR) of the signals. We derive a closed form expression of the probability of outage and this gives the general expression for our protocol and selective OFDM, OFDMA, and block-OFDM schemes. results show that the scheme achieves a better performance for a given number of blocks than the selective block-OFDM protocol.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 04 Jan 2013 00:27
Last Modified: 27 Aug 2014 04:36
Uncontrolled Keywords: OFDM; outage probability; selective relaying
Fields of Research : 08 Information and Computing Sciences > 0805 Distributed Computing > 080503 Networking and Communications
10 Technology > 1005 Communications Technologies > 100503 Computer Communications Networks
09 Engineering > 0906 Electrical and Electronic Engineering > 090609 Signal Processing
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970108 Expanding Knowledge in the Information and Computing Sciences
Identification Number or DOI: 10.1109/ISCIT.2012.6380970
URI: http://eprints.usq.edu.au/id/eprint/22509

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