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Performance investigation of a broadband OFDM system incorporating selection diversity and turbo coding

Lookup NU author(s): Emmanouil Kalantzis, Professor Bayan Sharif


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Wireless communication systems and terminals operate in an environment in which multipath effects and interference limit performance. These effects are most severe when a wireless device engaged in a communication is moving and there is no direct line of sight between itself and the receiving station. To help offset these limitations, diversity techniques (i.e., spatial, temporal, polarization) are used, many of which are very practical and provide significant link improvement with little added cost. In this paper a well-known diversity technique, known as selection diversity (SD), will be investigated. This scheme will be applied in systems utilising several well known (convolutional coding-CC) and recently presented (turbo coding-TC) techniques used to combat the impact of selective fading on the OFDM system performance. Also the adaptivity technique through bit loading has been considered for a further improvement in system performance. It will be shown that the turbo coding scheme, especially when combined with SD, provides sufficiently robust performance, rendering it a potential candidate for next generation broadband wireless communication systems, with the aim of providing extremely high data rate, bandwidth efficient signalling and improved quality of service (QoS). (10 References).

Publication metadata

Author(s): Kalantzis EI, Sharif BS, Dallas PI

Publication type: Conference Proceedings (inc. Abstract)

Conference Name: Communication Systems, Networks and Digital Signal Processing (CSNDSP)

Year of Conference: 2004

Pages: 400-403

Notes: Dlay SS Newcastle upon Tyne, UK. Communication Systems, Networks and Digital Signal Processing. CSNDSP 2004. Fourth International Symposium. Newcastle upon Tyne, UK. 20-22 July 2004.