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

Yang, Lie-Liang (2008) Performance of Multiantenna Multicarrier DS-CDMA Using OVSF Codes Assisted Space-Time Spreading in Time-Selective Fading Channels IET Proceeedings Communications, 2, (5), pp. 708-719.

Record type: Article


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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Published date: May 2008
Organisations: Southampton Wireless Group


Local EPrints ID: 265937
PURE UUID: dcec3b2e-6b24-42b5-a042-ff3a0d3884da
ORCID for Lie-Liang Yang: ORCID iD

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Date deposited: 13 Jun 2008 10:10
Last modified: 18 Jul 2017 07:21

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Author: Lie-Liang Yang ORCID iD

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