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Spectral-efficiency comparison of different multiple-access schemes under a generalized framework

Spectral-efficiency comparison of different multiple-access schemes under a generalized framework
Spectral-efficiency comparison of different multiple-access schemes under a generalized framework

Based on multicarrier communications principles, this paper compares the spectral-efficiency (SE) of a range of multiple-access (MA) schemes via a generalized framework referred to as the generalized code-division multiple-access (GCDMA). As detailed in the paper, by assuming different classes of spreading codes, the GCDMA can be readily configured to form different MA schemes. The ones considered include the frequency-division multiple-access (FDMA), orthogonal multicarrier CDMA (OMC-CDMA), fractionally spread OMC-CDMA (FS/OMC-CDMA), the low-density spreading or sparse-code multiple-access (SCMA), and the multicarrier CDMA (MC-CDMA) employing random binary spreading. For the SE of these MA schemes, we consider two operational modes, namely Mode A of fixed code-allocation and Mode B with adaptive code-allocation. Furthermore, for SCMA, we compare three operational scenarios, namely Scenarios 1,2, and 3, as specified in Section III. We provide the formulas for evaluating the SE of these MA schemes operated in different cases, and compare their SE performance based on numerical simulations.

FDMA, MC-CDMA, Multiple-access, NOMA, SCMA, Spectral-efficiency
1-6
Institute of Electrical and Electronics Engineers Inc.
Yang, Dong
f1cfcea5-7f0e-4bd3-8ba8-ff48708b7d60
Liu, Xingcheng
517e1f15-fe1b-4771-b630-d277b82a8948
Yang, Lie Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Yang, Dong
f1cfcea5-7f0e-4bd3-8ba8-ff48708b7d60
Liu, Xingcheng
517e1f15-fe1b-4771-b630-d277b82a8948
Yang, Lie Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7

Yang, Dong, Liu, Xingcheng and Yang, Lie Liang (2018) Spectral-efficiency comparison of different multiple-access schemes under a generalized framework. In 2017 IEEE/CIC International Conference on Communications in China, ICCC 2017. vol. 2018-January, Institute of Electrical and Electronics Engineers Inc. pp. 1-6 . (doi:10.1109/ICCChina.2017.8330408).

Record type: Conference or Workshop Item (Paper)

Abstract

Based on multicarrier communications principles, this paper compares the spectral-efficiency (SE) of a range of multiple-access (MA) schemes via a generalized framework referred to as the generalized code-division multiple-access (GCDMA). As detailed in the paper, by assuming different classes of spreading codes, the GCDMA can be readily configured to form different MA schemes. The ones considered include the frequency-division multiple-access (FDMA), orthogonal multicarrier CDMA (OMC-CDMA), fractionally spread OMC-CDMA (FS/OMC-CDMA), the low-density spreading or sparse-code multiple-access (SCMA), and the multicarrier CDMA (MC-CDMA) employing random binary spreading. For the SE of these MA schemes, we consider two operational modes, namely Mode A of fixed code-allocation and Mode B with adaptive code-allocation. Furthermore, for SCMA, we compare three operational scenarios, namely Scenarios 1,2, and 3, as specified in Section III. We provide the formulas for evaluating the SE of these MA schemes operated in different cases, and compare their SE performance based on numerical simulations.

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More information

Accepted/In Press date: 22 October 2017
Published date: 5 April 2018
Venue - Dates: 2017 IEEE/CIC International Conference on Communications in China, China, 2017-10-21 - 2017-10-23
Keywords: FDMA, MC-CDMA, Multiple-access, NOMA, SCMA, Spectral-efficiency

Identifiers

Local EPrints ID: 423243
URI: http://eprints.soton.ac.uk/id/eprint/423243
PURE UUID: c86ddf79-e20b-4719-bfb8-fcd0beed35c2
ORCID for Lie Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327

Catalogue record

Date deposited: 19 Sep 2018 16:30
Last modified: 07 Oct 2020 01:42

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Contributors

Author: Dong Yang
Author: Xingcheng Liu
Author: Lie Liang Yang ORCID iD

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