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Hybrid iterative detection and decoding of near-instantaneously adaptive turbo coded sparse code multiple access

Hybrid iterative detection and decoding of near-instantaneously adaptive turbo coded sparse code multiple access
Hybrid iterative detection and decoding of near-instantaneously adaptive turbo coded sparse code multiple access
Reduced-complexity hybrid detection and decoding (HDD) schemes are conceived for turbo-coded sparse code multiple access (SCMA) by analysing its convergence behavior using extrinsic information transfer (EXIT) charts, which outperforms the state of the art joint detector and decoder (JDD). As a benefit of its carefully controlled complexity, the resultant system is eminently suitable for ultra-reliable low-latency communication (URLLC) in multiuser scenarios, since it requires a low number of turbo iterations between the detector and the decoder. In particular, a pair of HDD schemes are proposed. HDD-I and HDD-II achieve a complexity reduction of up to 25% and 36%, respectively, at a similar bit error rate (BER) performance as that of JDD. Additionally, we propose an adaptive turbo-coded SCMA system for mitigating the influence of multipath propagation so that the system’s bits per symbol (BPS) throughput may be improved under favorable channel conditions by using the most appropriate near-instantaneous user load, modulation order and coding rate. Our adaptive system design
Adaptive systems, Complexity theory, Decoding, Detectors, Encoding, Iterative decoding, SCMA, Turbo codes, adaptive QAM, turbo codes
0018-9545
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Liu, Yusha, Xiang, Luping, Maunder, Robert, Yang, Lie-Liang and Hanzo, Lajos (2021) Hybrid iterative detection and decoding of near-instantaneously adaptive turbo coded sparse code multiple access. IEEE Transactions on Vehicular Technology. (doi:10.1109/TVT.2021.3071808).

Record type: Article

Abstract

Reduced-complexity hybrid detection and decoding (HDD) schemes are conceived for turbo-coded sparse code multiple access (SCMA) by analysing its convergence behavior using extrinsic information transfer (EXIT) charts, which outperforms the state of the art joint detector and decoder (JDD). As a benefit of its carefully controlled complexity, the resultant system is eminently suitable for ultra-reliable low-latency communication (URLLC) in multiuser scenarios, since it requires a low number of turbo iterations between the detector and the decoder. In particular, a pair of HDD schemes are proposed. HDD-I and HDD-II achieve a complexity reduction of up to 25% and 36%, respectively, at a similar bit error rate (BER) performance as that of JDD. Additionally, we propose an adaptive turbo-coded SCMA system for mitigating the influence of multipath propagation so that the system’s bits per symbol (BPS) throughput may be improved under favorable channel conditions by using the most appropriate near-instantaneous user load, modulation order and coding rate. Our adaptive system design

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Accepted/In Press date: 6 April 2021
e-pub ahead of print date: 8 April 2021
Keywords: Adaptive systems, Complexity theory, Decoding, Detectors, Encoding, Iterative decoding, SCMA, Turbo codes, adaptive QAM, turbo codes

Identifiers

Local EPrints ID: 448233
URI: http://eprints.soton.ac.uk/id/eprint/448233
ISSN: 0018-9545
PURE UUID: 8bf9f577-e448-4b0b-8950-4c13124432c9
ORCID for Luping Xiang: ORCID iD orcid.org/0000-0003-1465-6708
ORCID for Robert Maunder: ORCID iD orcid.org/0000-0002-7944-2615
ORCID for Lie-Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 15 Apr 2021 16:34
Last modified: 30 Apr 2021 02:00

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