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Iteratively Decoded Irregular Variable Length Coding and Sphere-Packing Modulation-Aided Differential Space-Time Spreading

El-Hajjar, M., Maunder, R. G., Alamri, O., Ng, S. X. and Hanzo, L. (2007) Iteratively Decoded Irregular Variable Length Coding and Sphere-Packing Modulation-Aided Differential Space-Time Spreading At IEEE VTC'07 (Fall), United States. 30 Sep - 03 Oct 2007. , pp. 1238-1242.

Record type: Conference or Workshop Item (Paper)


In this paper we consider serially concatenated and iteratively decoded Irregular Variable Length Coding (IrVLC) combined with precoded Differential Space-Time Spreading (DSTS) aided multidimensional Sphere Packing (SP) modulation designed for near-capacity joint source and channel coding. The IrVLC scheme comprises a number of component Variable Length Coding (VLC) codebooks having different coding rates for the sake of encoding particular fractions of the input source symbol stream. The relative length of these source-stream fractions can be chosen with the aid of EXtrinsic Information Transfer (EXIT) charts in order to shape the EXIT curve of the IrVLC codec, so that an open EXIT chart tunnel may be created even at low Eb/N0 values that are close to the capacity bound of the channel. These schemes are shown to be capable of operating within 0.9 dB of the DSTS-SP channel’s capacity bound using an average interleaver length of 113, 100 bits and an effective bandwidth efficiency of 1 bit/s/Hz, assuming ideal Nyquist filtering. By contrast, the equivalent-rate regular VLC-based benchmarker scheme was found to be capable of operating at 1.4 dB from the capacity bound, which is about 1.56 times the corresponding discrepancy of the proposed IrVLC-aided scheme.

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Published date: 30 September 2007
Additional Information: Event Dates: 30 September - 3 October 2007
Venue - Dates: IEEE VTC'07 (Fall), United States, 2007-09-30 - 2007-10-03
Organisations: Southampton Wireless Group


Local EPrints ID: 264469
PURE UUID: 9757ffe1-e7c4-464c-a392-b1479a07ecc6
ORCID for M. El-Hajjar: ORCID iD
ORCID for R. G. Maunder: ORCID iD

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Date deposited: 05 Sep 2007
Last modified: 18 Jul 2017 07:35

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Author: M. El-Hajjar ORCID iD
Author: R. G. Maunder ORCID iD
Author: O. Alamri
Author: S. X. Ng
Author: L. Hanzo

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