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Transmitter Preprocessing Assisted Cooperative Downlink Transmission in DS-CDMA Systems Experiencing Propagation Pathloss and Nakagami-m Fading

Transmitter Preprocessing Assisted Cooperative Downlink Transmission in DS-CDMA Systems Experiencing Propagation Pathloss and Nakagami-m Fading
Transmitter Preprocessing Assisted Cooperative Downlink Transmission in DS-CDMA Systems Experiencing Propagation Pathloss and Nakagami-m Fading
In this contribution we propose and investigate a relay diversity transmission scheme for the direct-sequence code-division multiple-access (DS-CDMA) downlink, where each (destination) mobile terminal (MT) is aided by a cluster of relays for achieving the relay diversity. In the considered system downlink multiuser interference (MUI) is suppressed with the aid of transmitter preprocessing operated at the base-station (BS). Two transmitter preprocessing schemes are considered, which are operated in the principles of transmitter zero-forcing (TZF) and transmitter minimum mean-square error (TMMSE). At the MTs, signals received from the BS and relays are combined based on the principles of maximal ratio combining (MRC) or of maximum signal-to-interference-plus-noise ratio (MSINR). In this contribution the bit error rate (BER) performance of the relay-assisted DS-CDMA downlink is investigated, when the communications channels are assumed to experience both propagation pathloss and generalized Nakagami-m fading. Our study and simulation results show that the transmitter preprocessing can help to achieve the relay diversity by efficiently mitigating the MUI presenting at the relays and MTs. Furthermore, in our proposed relay diversity scheme the relays only require lowcomplexity signal processing for forwarding information to their served MTs.
0018-9545
Fang, Wei
781e303e-dc14-4451-ba6f-b78f014fa342
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Fang, Wei
781e303e-dc14-4451-ba6f-b78f014fa342
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Fang, Wei, Yang, Lie-Liang and Hanzo, Lajos (2009) Transmitter Preprocessing Assisted Cooperative Downlink Transmission in DS-CDMA Systems Experiencing Propagation Pathloss and Nakagami-m Fading. IEEE Transactions on Vehicular Technology.

Record type: Article

Abstract

In this contribution we propose and investigate a relay diversity transmission scheme for the direct-sequence code-division multiple-access (DS-CDMA) downlink, where each (destination) mobile terminal (MT) is aided by a cluster of relays for achieving the relay diversity. In the considered system downlink multiuser interference (MUI) is suppressed with the aid of transmitter preprocessing operated at the base-station (BS). Two transmitter preprocessing schemes are considered, which are operated in the principles of transmitter zero-forcing (TZF) and transmitter minimum mean-square error (TMMSE). At the MTs, signals received from the BS and relays are combined based on the principles of maximal ratio combining (MRC) or of maximum signal-to-interference-plus-noise ratio (MSINR). In this contribution the bit error rate (BER) performance of the relay-assisted DS-CDMA downlink is investigated, when the communications channels are assumed to experience both propagation pathloss and generalized Nakagami-m fading. Our study and simulation results show that the transmitter preprocessing can help to achieve the relay diversity by efficiently mitigating the MUI presenting at the relays and MTs. Furthermore, in our proposed relay diversity scheme the relays only require lowcomplexity signal processing for forwarding information to their served MTs.

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More information

Published date: April 2009
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 267232
URI: https://eprints.soton.ac.uk/id/eprint/267232
ISSN: 0018-9545
PURE UUID: d5a096b6-f863-45c8-926e-176a8635bcab
ORCID for Lie-Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 06 May 2009 13:30
Last modified: 06 Jun 2018 13:15

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Contributors

Author: Wei Fang
Author: Lie-Liang Yang ORCID iD
Author: Lajos Hanzo ORCID iD

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