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Downlink MC-2D-CDMA over time-variant frequency-selective rayleigh fading channels

Lookup NU author(s): Rui Fa, Professor Bayan Sharif, Dr Charalampos Tsimenidis

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Abstract

In this paper, the performance of a downlink synchronous MC-CDMA system with joint frequency-time domain spreading over time-variant frequency-selective Rayleigh fading channels is investigated. We propose an adaptive two dimensional MMSE (minimum mean square error) receiver, which works in decision-directed model after the initial training period. Due to the time variability, a subcarrier phase tracker, which comprises a bank of phase locked-loops (PLLs), is employed in the proposed receiver to track the fading phase variability. Furthermore, a simplified phase tracker structure is proposed to reduce the complexity of system. The theoretical bit error rate (BER) is derived and simulation results indicate that the proposed receiver can achieve good frequency diversity and subcarrier synchronisation, compared to the conventional MCCDMA structures. © 2007 IEEE.


Publication metadata

Author(s): Fa R, Sharif BS, Tsimenidis CC

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: IEEE International Conference on Communications

Year of Conference: 2007

Pages: 2956-2960

Date deposited: 26/05/2010

Publisher: Institute of Electrical and Electronics Engineers

URL: http://dx.doi.org/10.1109/ICC.2007.491

DOI: 10.1109/ICC.2007.491

Library holdings: Search Newcastle University Library for this item

ISBN: 1424403537


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