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Over-Complete Source-Mapping Aided AMR-WB Using Iteratively Detected Differential Space-Time Spreading

Othman, Noor, El-Hajjar, Mohammed, Pham Quang, Anh, Alamri, Osamah, Ng, Soon and Hanzo, Lajos (2010) Over-Complete Source-Mapping Aided AMR-WB Using Iteratively Detected Differential Space-Time Spreading At 2010 IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), Taiwan, Province of China. 16 - 19 May 2010. , pp. 1-5. (doi:10.1109/VETECS.2010.5493798).

Record type: Conference or Workshop Item (Paper)

Abstract

The achievable performance of a jointly optimised iterative source and channel decoding (ISCD) arrangement invoking the Adaptive MultiRate Wideband (AMR-WB) speech codec is characterized, which exploits the intentional redundancy imposed by the proposed Over-Complete source-Mapping (OCM) scheme. The resultant OCM-aided AMR-WB bitstream is protected by a Recursive Systematic Convolutional (RSC) code and mapped to a Differential Space-Time Spreading (DSTS) arrangement using Sphere Packing (SP) modulation for transmission over narrowband temporally correlated Rayleigh fading channels. The effect of appropriately apportioning the total amount of redundancy between the source and channel codecs on the attainable system performance is demonstrated, while keeping the overall coding rate constant. The decoding convergence of the proposed scheme is studied with the aid of Extrinsic Information Transfer (EXIT) charts. Explicitly, our experimental results show that the specific scheme using a 2/3-rate channel encoder and a 3/4-rate OCM scheme exhibits an Eb /N0 gain of 0.7 dB at the SegSNR degradation point of 1 dB, when compared to the system that assigns all the redundancy to the OCM scheme. By contrast, the scheme using a 3/4-rate channel encoder and a 8/9-rate OCM results in an Eb /N0 gain of 1.0 dB.

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More information

Published date: May 2010
Venue - Dates: 2010 IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), Taiwan, Province of China, 2010-05-16 - 2010-05-19
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 271162
URI: http://eprints.soton.ac.uk/id/eprint/271162
ISBN: 978-1-4244-2519-8
PURE UUID: fbf9ee91-d518-4e54-bf3f-a1aaacaede0c
ORCID for Mohammed El-Hajjar: ORCID iD orcid.org/0000-0002-7987-1401

Catalogue record

Date deposited: 25 May 2010 19:56
Last modified: 18 Jul 2017 06:46

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Contributors

Author: Noor Othman
Author: Mohammed El-Hajjar ORCID iD
Author: Anh Pham Quang
Author: Osamah Alamri
Author: Soon Ng
Author: Lajos Hanzo

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