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Partial Equalization for MC–CDMA Systems in Non-Ideally Estimated Correlated Fading

Partial Equalization for MC–CDMA Systems in Non-Ideally Estimated Correlated Fading
Partial Equalization for MC–CDMA Systems in Non-Ideally Estimated Correlated Fading
Multicarrier code-division multiple access (MC–CDMA) can support high data rates in next-generation multiuser wireless communication systems. Partial equalization (PE) is a low-complexity technique for combining the signals of subcarriers to improve the achievable performance of MC–CDMA systems in terms of their bit error probability (BEP) and bit error outage (BEO) in comparison with maximal ratio combining, orthogonality restoring combining, and equal-gain combining techniques. We analyze the performance of the multiuser MC–CDMA downlink and derive the optimal PE parameter expression, which minimizes the BEP. Realistic imperfect channel estimation and frequency-domain (FD) block-fading channels are considered. More explicitly, the analytical expression of the optimum PE parameter is derived as a function of the number of subcarriers, number of active users (i.e., the system load), mean signal-to-noise ratio (SNR), and variance of the channel-estimation errors for the aforementioned FD block-fading channel. We show that the choice of the optimal PE technique significantly increases the achievable system load for the given target BEP and BEO.
0018-9545
3818-3830
Zabini, Flavio
15ae26f7-2fec-40f0-bcf7-c28176f91110
Masini, Barbara M
fe74f321-bd52-41ad-bfbb-046873927b0c
Conti, Andrea
2f79f756-49f5-474d-bc49-b3b1db53e791
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zabini, Flavio
15ae26f7-2fec-40f0-bcf7-c28176f91110
Masini, Barbara M
fe74f321-bd52-41ad-bfbb-046873927b0c
Conti, Andrea
2f79f756-49f5-474d-bc49-b3b1db53e791
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Zabini, Flavio, Masini, Barbara M, Conti, Andrea and Hanzo, Lajos (2010) Partial Equalization for MC–CDMA Systems in Non-Ideally Estimated Correlated Fading. IEEE Transactions on Vehicular Technology, 59, 3818-3830.

Record type: Article

Abstract

Multicarrier code-division multiple access (MC–CDMA) can support high data rates in next-generation multiuser wireless communication systems. Partial equalization (PE) is a low-complexity technique for combining the signals of subcarriers to improve the achievable performance of MC–CDMA systems in terms of their bit error probability (BEP) and bit error outage (BEO) in comparison with maximal ratio combining, orthogonality restoring combining, and equal-gain combining techniques. We analyze the performance of the multiuser MC–CDMA downlink and derive the optimal PE parameter expression, which minimizes the BEP. Realistic imperfect channel estimation and frequency-domain (FD) block-fading channels are considered. More explicitly, the analytical expression of the optimum PE parameter is derived as a function of the number of subcarriers, number of active users (i.e., the system load), mean signal-to-noise ratio (SNR), and variance of the channel-estimation errors for the aforementioned FD block-fading channel. We show that the choice of the optimal PE technique significantly increases the achievable system load for the given target BEP and BEO.

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Published date: October 2010
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 271638
URI: http://eprints.soton.ac.uk/id/eprint/271638
ISSN: 0018-9545
PURE UUID: 27a69cff-0fda-4018-9f69-ddc2e4452c74
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 18 Oct 2010 20:44
Last modified: 18 Mar 2024 02:34

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Contributors

Author: Flavio Zabini
Author: Barbara M Masini
Author: Andrea Conti
Author: Lajos Hanzo ORCID iD

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