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Performance of Multiantenna Multicarrier DS-CDMA Using OVSF Codes Assisted Space-Time Spreading in Time-Selective Fading Channels

Performance of Multiantenna Multicarrier DS-CDMA Using OVSF Codes Assisted Space-Time Spreading in Time-Selective Fading Channels
Performance of Multiantenna Multicarrier DS-CDMA Using OVSF Codes Assisted Space-Time Spreading in Time-Selective Fading Channels
A downlink (base-to-mobile) multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) system employing multiple antennas at both the base-station (BS) and each of the mobile terminals (MTs) is investigated, when communicating over fast time-varying fading channels resulting in time-selective fading. In the considered multiantenna MC DS-CDMA, space-time spreading (STS) based on the family of orthogonal variable spreading factor (OVSF) codes is proposed in order to achieve the time-diversity due to the time-selective fading, in addition to the transmit/receive diversity. In this contribution we derive the closed-form expressions for the single-user bit error rate (BER), in order to gain insight into the achievable BER performance of the multiantenna MC DS-CDMA. The BER performance of the multiantenna MC DS-CDMA system is investigated when communicating over correlated time-selective Rayleigh fading channels. Our study and performance results show that the multiantenna MC DS-CDMA using OVSF codes assisted STS constitutes a high-efficiency downlink space-time transmission scheme. It is capable of achieving the full diversity provided by the time-selective fading and multiple transmit/receive antennas. Furthermore, the proposed multiantenna MC DS-CDMA is capable of achieving a self-balance between the time-diversity achieved and the multiuser interference (MUI) suppression capability, when using low-complexity correlation detection.
708-719
Yang, LL
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Yang, LL
ae425648-d9a3-4b7d-8abd-b3cfea375bc7

Yang, LL (2008) Performance of Multiantenna Multicarrier DS-CDMA Using OVSF Codes Assisted Space-Time Spreading in Time-Selective Fading Channels. IET Proceeedings Communications, 2 (5), 708-719. (doi:10.1049/iet-com:20070297).

Record type: Article

Abstract

A downlink (base-to-mobile) multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) system employing multiple antennas at both the base-station (BS) and each of the mobile terminals (MTs) is investigated, when communicating over fast time-varying fading channels resulting in time-selective fading. In the considered multiantenna MC DS-CDMA, space-time spreading (STS) based on the family of orthogonal variable spreading factor (OVSF) codes is proposed in order to achieve the time-diversity due to the time-selective fading, in addition to the transmit/receive diversity. In this contribution we derive the closed-form expressions for the single-user bit error rate (BER), in order to gain insight into the achievable BER performance of the multiantenna MC DS-CDMA. The BER performance of the multiantenna MC DS-CDMA system is investigated when communicating over correlated time-selective Rayleigh fading channels. Our study and performance results show that the multiantenna MC DS-CDMA using OVSF codes assisted STS constitutes a high-efficiency downlink space-time transmission scheme. It is capable of achieving the full diversity provided by the time-selective fading and multiple transmit/receive antennas. Furthermore, the proposed multiantenna MC DS-CDMA is capable of achieving a self-balance between the time-diversity achieved and the multiuser interference (MUI) suppression capability, when using low-complexity correlation detection.

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More information

Published date: May 2008
Additional Information: Imported from ISI Web of Science
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 265937
URI: http://eprints.soton.ac.uk/id/eprint/265937
PURE UUID: dcec3b2e-6b24-42b5-a042-ff3a0d3884da
ORCID for LL Yang: ORCID iD orcid.org/0000-0002-2032-9327

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Date deposited: 13 Jun 2008 10:10
Last modified: 15 Mar 2024 02:59

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Author: LL Yang ORCID iD

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