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Novel Transmission Schemes for Multicell Downlink MC/DS-CDMA Systems Employing Time- and Frequency-Domain Spreading

Novel Transmission Schemes for Multicell Downlink MC/DS-CDMA Systems Employing Time- and Frequency-Domain Spreading
Novel Transmission Schemes for Multicell Downlink MC/DS-CDMA Systems Employing Time- and Frequency-Domain Spreading
This contribution investigates the achievable error performance of transmitter preprocessing in the downlink multicell multicarrier direct-sequence code-division multiple-access (MMC/DS-CDMA) systems employing both time (T)-domain and frequency (F)-domain spreading. Three types of multiuser transmitter preprocessing (MUTP) schemes are studied and compared, when assuming communications over frequency-selective Rayleigh fading channels. The first one is a single-cell minimum mean-square error MUTP (SMMSE-MUTP1), which only aims at suppressing the intracell interference (IntraCI). The second one is also a single-cell MMSE-MUTP (SMMSE-MUTP2), which tries to suppress both the IntraCI and intercell interference (InterCI). The final one is the multicell cooperative MMSE-MUTP (CMMSE-MUTP), which exploits the multicell diversity (or macro-diversity) for interference suppression and performance enhancement. Furthermore, power-allocation in these schemes is considered. Our studies show that the CMMSE-MUTP is capable of achieving the best error performance among the three schemes considered. However, it demands an extremely high complexity, as it requires information exchange among the base-stations (BSs) with the aid of a backhaul system. By contrast, when the number of mobile terminals (MTs) supported by each cell is not very high, the SMMSE-MUTP2, which does not require any intercell cooperation, can effectively mitigate both the IntraCI and the InterCI.
Shi, Jia
1bed2b92-b1bc-4500-8eeb-7525d9d3f0e6
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Shi, Jia
1bed2b92-b1bc-4500-8eeb-7525d9d3f0e6
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7

Shi, Jia and Yang, Lie-Liang (2013) Novel Transmission Schemes for Multicell Downlink MC/DS-CDMA Systems Employing Time- and Frequency-Domain Spreading. 77th IEEE Vehicular Technology Conference, Dresden, Germany. 02 - 05 Jun 2013.

Record type: Conference or Workshop Item (Paper)

Abstract

This contribution investigates the achievable error performance of transmitter preprocessing in the downlink multicell multicarrier direct-sequence code-division multiple-access (MMC/DS-CDMA) systems employing both time (T)-domain and frequency (F)-domain spreading. Three types of multiuser transmitter preprocessing (MUTP) schemes are studied and compared, when assuming communications over frequency-selective Rayleigh fading channels. The first one is a single-cell minimum mean-square error MUTP (SMMSE-MUTP1), which only aims at suppressing the intracell interference (IntraCI). The second one is also a single-cell MMSE-MUTP (SMMSE-MUTP2), which tries to suppress both the IntraCI and intercell interference (InterCI). The final one is the multicell cooperative MMSE-MUTP (CMMSE-MUTP), which exploits the multicell diversity (or macro-diversity) for interference suppression and performance enhancement. Furthermore, power-allocation in these schemes is considered. Our studies show that the CMMSE-MUTP is capable of achieving the best error performance among the three schemes considered. However, it demands an extremely high complexity, as it requires information exchange among the base-stations (BSs) with the aid of a backhaul system. By contrast, when the number of mobile terminals (MTs) supported by each cell is not very high, the SMMSE-MUTP2, which does not require any intercell cooperation, can effectively mitigate both the IntraCI and the InterCI.

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Published date: June 2013
Venue - Dates: 77th IEEE Vehicular Technology Conference, Dresden, Germany, 2013-06-02 - 2013-06-05
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 354721
URI: http://eprints.soton.ac.uk/id/eprint/354721
PURE UUID: 57c70b4e-b1e2-40b5-b3e1-168700188415
ORCID for Lie-Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327

Catalogue record

Date deposited: 17 Jul 2013 22:31
Last modified: 20 Jul 2019 01:12

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