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Time-Hopping Multicarrier Code-Division Multiple-Access

Time-Hopping Multicarrier Code-Division Multiple-Access
Time-Hopping Multicarrier Code-Division Multiple-Access
A time-hopping multicarrier code-division multiple-access (TH/MC-CDMA) scheme is proposed and investigated. In the proposed TH/MC-CDMA each information symbol is transmitted by a number of time-domain pulses with each time-domain pulse modulating a subcarrier. The transmitted information at the receiver is extracted from one of the, say $M$, possible time-slot positions, i.e., assuming that $M$-ary pulse position modulation is employed. Specifically, in this contribution we concentrate on the scenarios such as system design, power spectral density (PSD) and single-user based signal detection. The error performance of the TH/MC-CDMA system is investigated, when each subcarrier signal experiences flat Nakagami-$m$ fading in addition to additive white Gaussian noise (AWGN). According to our analysis and results, it can be shown that the TH/MC-CDMA signal is capable of providing a near ideal PSD, which is flat over the system bandwidth available, while decreases rapidly beyond that bandwidth. Explicitly, signals having this type of PSD is beneficial to both broadband and ultra-wide bandwidth (UWB) communications. Furthermore, our results show that, when optimum user address codes are employed, the single-user detector considered is near-far resistant, provided that the number of users supported by the system is lower than the number of subcarriers used for conveying an information symbol.
Time-hopping, multicarrier, code-division multiple-access, power spectral density, Nakagami fading channels, frequency-time matrix, ultra-wide bandwidth radio, multiuser detection.
0018-9545
731-741
Yang, L.-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Yang, L.-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7

Yang, L.-L. (2006) Time-Hopping Multicarrier Code-Division Multiple-Access. IEEE Transactions on Vehicular Technology, 56 (2), 731-741. (doi:10.1109/TVT.2006.889577).

Record type: Article

Abstract

A time-hopping multicarrier code-division multiple-access (TH/MC-CDMA) scheme is proposed and investigated. In the proposed TH/MC-CDMA each information symbol is transmitted by a number of time-domain pulses with each time-domain pulse modulating a subcarrier. The transmitted information at the receiver is extracted from one of the, say $M$, possible time-slot positions, i.e., assuming that $M$-ary pulse position modulation is employed. Specifically, in this contribution we concentrate on the scenarios such as system design, power spectral density (PSD) and single-user based signal detection. The error performance of the TH/MC-CDMA system is investigated, when each subcarrier signal experiences flat Nakagami-$m$ fading in addition to additive white Gaussian noise (AWGN). According to our analysis and results, it can be shown that the TH/MC-CDMA signal is capable of providing a near ideal PSD, which is flat over the system bandwidth available, while decreases rapidly beyond that bandwidth. Explicitly, signals having this type of PSD is beneficial to both broadband and ultra-wide bandwidth (UWB) communications. Furthermore, our results show that, when optimum user address codes are employed, the single-user detector considered is near-far resistant, provided that the number of users supported by the system is lower than the number of subcarriers used for conveying an information symbol.

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More information

Published date: March 2006
Keywords: Time-hopping, multicarrier, code-division multiple-access, power spectral density, Nakagami fading channels, frequency-time matrix, ultra-wide bandwidth radio, multiuser detection.
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 262126
URI: http://eprints.soton.ac.uk/id/eprint/262126
ISSN: 0018-9545
PURE UUID: bc447439-c9cb-4eaf-9a5c-46501ff88a70
ORCID for L.-L. Yang: ORCID iD orcid.org/0000-0002-2032-9327

Catalogue record

Date deposited: 24 Mar 2006
Last modified: 10 Dec 2019 01:51

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