EXIT Chart Based Joint Code-Rate and Spreading-Factor Optimisation of Single-Carrier Interleave Division Multiple Access
EXIT Chart Based Joint Code-Rate and Spreading-Factor Optimisation of Single-Carrier Interleave Division Multiple Access
Abstract—In this paper, we consider the joint code-rate and spreading-factor optimisation of turbo-style iterative joint detection and decoding assisted single-carrier interleave division multiple access (SC-IDMA) systems using different-rate convolutional codes and Extrinsic Information Transfer (EXIT) charts, when communicating over Additive White Gaussian Noise (AWGN) channels. More explicitly, we study the extrinsic information exchange between two serial concatenated components and maximise the number of users supported by the SC-IDMA system under the constraint of a fixed bandwidth expansion factor, while maintaining a predefined Bit Error Ratio (BER) versus Eb/N0 performance. We found that an optimum coderate and spreading-factor combination can be found for the SC-IDMA system at low Eb/N0 values, where maintaining a low BER inevitably requires the employment of channel coding. By contrast, at high Eb/N0 the system performs best, when no channel coding is used, i.e. DS-spreading is the only means of bandwidth expansion.
735-739
Zhang, R
286243d7-7889-4770-86da-c6984e485b09
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
2007
Zhang, R
286243d7-7889-4770-86da-c6984e485b09
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, R and Hanzo, L.
(2007)
EXIT Chart Based Joint Code-Rate and Spreading-Factor Optimisation of Single-Carrier Interleave Division Multiple Access.
IEEE WCNC'07, Hong Kong.
11 - 15 Mar 2007.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Abstract—In this paper, we consider the joint code-rate and spreading-factor optimisation of turbo-style iterative joint detection and decoding assisted single-carrier interleave division multiple access (SC-IDMA) systems using different-rate convolutional codes and Extrinsic Information Transfer (EXIT) charts, when communicating over Additive White Gaussian Noise (AWGN) channels. More explicitly, we study the extrinsic information exchange between two serial concatenated components and maximise the number of users supported by the SC-IDMA system under the constraint of a fixed bandwidth expansion factor, while maintaining a predefined Bit Error Ratio (BER) versus Eb/N0 performance. We found that an optimum coderate and spreading-factor combination can be found for the SC-IDMA system at low Eb/N0 values, where maintaining a low BER inevitably requires the employment of channel coding. By contrast, at high Eb/N0 the system performs best, when no channel coding is used, i.e. DS-spreading is the only means of bandwidth expansion.
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Published date: 2007
Additional Information:
Event Dates: 11-15 March 2007
Venue - Dates:
IEEE WCNC'07, Hong Kong, 2007-03-11 - 2007-03-15
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 263891
URI: http://eprints.soton.ac.uk/id/eprint/263891
PURE UUID: 84f2838c-2259-4642-929b-cfd902526555
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Date deposited: 19 Apr 2007
Last modified: 18 Mar 2024 02:34
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Contributors
Author:
R Zhang
Author:
L. Hanzo
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