Coherent and Differential Downlink Space-Time Steering Aided Generalised Multicarrier DS-CDMA
Coherent and Differential Downlink Space-Time Steering Aided Generalised Multicarrier DS-CDMA
This paper presents a generalised MultiCarrier Direct Sequence Code Division Multiple Access (MC DS-CDMA) system invoking smart antennas for improving the achievable performance in the downlink. In this contribution, the MC DSCDMA transmitter employs an Antenna Array (AA) and Steered Space-Time Spreading (SSTS). Furthermore, the proposed system employs both Time and Frequency (TF) domain spreading for extending the capacity of the system, which is combined with a user-grouping technique for reducing the effects of Multi-User Interference (MUI). Moreover, to eliminate the high complexity Multiple Input Multiple Output (MIMO) channel estimation required for coherent detection, we also propose a Differential SSTS (DSSTS) scheme. More explicitly, for coherent SSTS detection MVNr number of channel estimates have to be generated, where M is the number of transmit AAs, V is the number of subcarriers and Nr is the number of receive antennas. This is a challenging task, which renders the low-complexity DSSTS scheme attractive. Index Terms—MIMO, MC DS-CDMA, beamforming, spacetime spreading, differential space-time spreading.
3857-3863
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Hu, B
5dcb8fd4-63dc-4902-9fa0-e8e6481cdb4f
Yang, L-L
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
November 2007
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Hu, B
5dcb8fd4-63dc-4902-9fa0-e8e6481cdb4f
Yang, L-L
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
El-Hajjar, Mohammed, Hu, B, Yang, L-L and Hanzo, L
(2007)
Coherent and Differential Downlink Space-Time Steering Aided Generalised Multicarrier DS-CDMA.
IEEE Transactions on Wireless Communications, 6 (11), .
Abstract
This paper presents a generalised MultiCarrier Direct Sequence Code Division Multiple Access (MC DS-CDMA) system invoking smart antennas for improving the achievable performance in the downlink. In this contribution, the MC DSCDMA transmitter employs an Antenna Array (AA) and Steered Space-Time Spreading (SSTS). Furthermore, the proposed system employs both Time and Frequency (TF) domain spreading for extending the capacity of the system, which is combined with a user-grouping technique for reducing the effects of Multi-User Interference (MUI). Moreover, to eliminate the high complexity Multiple Input Multiple Output (MIMO) channel estimation required for coherent detection, we also propose a Differential SSTS (DSSTS) scheme. More explicitly, for coherent SSTS detection MVNr number of channel estimates have to be generated, where M is the number of transmit AAs, V is the number of subcarriers and Nr is the number of receive antennas. This is a challenging task, which renders the low-complexity DSSTS scheme attractive. Index Terms—MIMO, MC DS-CDMA, beamforming, spacetime spreading, differential space-time spreading.
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Published date: November 2007
Organisations:
Southampton Wireless Group
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Local EPrints ID: 264958
URI: http://eprints.soton.ac.uk/id/eprint/264958
PURE UUID: f3426896-4f63-4cc9-ba35-24fc44b52dd4
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Date deposited: 12 Dec 2007 17:07
Last modified: 18 Mar 2024 03:21
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