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Time–frequency iterative multiuser detection in time–frequency-domain spread multicarrier DS-CDMA systems over Nakagami-m fading channels

Time–frequency iterative multiuser detection in time–frequency-domain spread multicarrier DS-CDMA systems over Nakagami-m fading channels
Time–frequency iterative multiuser detection in time–frequency-domain spread multicarrier DS-CDMA systems over Nakagami-m fading channels
In this paper, we propose and study a novel Time–frequency-domain iterative multiuser detector (TF-IMUD) for the multicarrier direct-sequence code-division multiple-access (DS-CDMA) systems employing both time (T)-domain and frequency (F)-domain spreading, which, for brevity, are referred to as the TF/MC DS-CDMA systems. This novel TFIMUD consists of a set of T-domain soft-input soft-output MUDs (SISO-MUDs) and a set of F-domain SISO-MUDs, where information is exchanged between the T-domain and F-domain through two multiuser interference (MUI) cancellation units. The T-domain and F-domain SISO-MUDs are operated under the maximum likelihood (ML) principles, and they are facilitated to be implemented using parallel signal processing techniques. In this paper, the complexity of the TF-IMUD and the bit error rate (BER) performance of the TF/MC DS-CDMA systems employing the proposed TF-IMUD are investigated and also compared with the other existingMUDschemes, including the optimum ML-MUD and the joint/separate minimum mean-square error (MMSE)-MUDs. Our study and simulation results showthat the TF-IMUD is capable of achieving nearly the same BER performance as the optimum ML-MUD, but at significantly lower complexity.
2-13
Pan, Peng
56ea394e-58af-4d6f-8bd5-d08784d3a7f8
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Zhang, Youguang
981009fc-2934-41e9-85a5-9945e9c9e37c
Pan, Peng
56ea394e-58af-4d6f-8bd5-d08784d3a7f8
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Zhang, Youguang
981009fc-2934-41e9-85a5-9945e9c9e37c

Pan, Peng, Yang, Lie-Liang and Zhang, Youguang (2011) Time–frequency iterative multiuser detection in time–frequency-domain spread multicarrier DS-CDMA systems over Nakagami-m fading channels. European Transactions on Telecommunications, 22 (1), 2-13.

Record type: Article

Abstract

In this paper, we propose and study a novel Time–frequency-domain iterative multiuser detector (TF-IMUD) for the multicarrier direct-sequence code-division multiple-access (DS-CDMA) systems employing both time (T)-domain and frequency (F)-domain spreading, which, for brevity, are referred to as the TF/MC DS-CDMA systems. This novel TFIMUD consists of a set of T-domain soft-input soft-output MUDs (SISO-MUDs) and a set of F-domain SISO-MUDs, where information is exchanged between the T-domain and F-domain through two multiuser interference (MUI) cancellation units. The T-domain and F-domain SISO-MUDs are operated under the maximum likelihood (ML) principles, and they are facilitated to be implemented using parallel signal processing techniques. In this paper, the complexity of the TF-IMUD and the bit error rate (BER) performance of the TF/MC DS-CDMA systems employing the proposed TF-IMUD are investigated and also compared with the other existingMUDschemes, including the optimum ML-MUD and the joint/separate minimum mean-square error (MMSE)-MUDs. Our study and simulation results showthat the TF-IMUD is capable of achieving nearly the same BER performance as the optimum ML-MUD, but at significantly lower complexity.

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Published date: January 2011
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 272618
URI: http://eprints.soton.ac.uk/id/eprint/272618
PURE UUID: 3e25cd92-22fa-44c9-8550-b70d972f1c31
ORCID for Lie-Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327

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Date deposited: 05 Aug 2011 10:08
Last modified: 03 Dec 2019 01:56

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