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Iterative detection and phase recovery for downlink DS and MC-CDMAFlat rayleigh fading channels

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

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Abstract

In this paper, iterative detection is applied in the receiver for downlink of both Direct Sequence (DS) and Multicarrier (MC) code division multiple access (CDMA) systems in the flat Rayleigh fading channels. A joint iterative detection and phase recovery scheme is proposed. Unlike the conventional Bitinterleaved coded modulation with iterative decoding (BICM-ID) structure, the proposed receiver feeds the extrinsic information from soft-input soft-output (SISO) decoder back to update both the adaptive minimum mean squared error (MMSE) correlator and phase locked-loop (PLL) instead of de-mapper. We also investigate how the second-order PLL benefits from the iterative process over the time-varying flat Rayleigh fading channel. Simulation results illustrate that the iterative process significantly improves the performance of the adaptive detector by suppressing multiple access interference (MAI). Additionally, the tracking capability of PLL is enhanced by reducing the equivalent noise power. © 2007 IEEE.


Publication metadata

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

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: IEEE Vehicular Technology Conference

Year of Conference: 2007

Pages: 2315-2319

Publisher: IEEE: Piscataway, N.J.

URL: http://dx.doi.org/10.1109/VETECS.2007.478

DOI: 10.1109/VETECS.2007.478

Library holdings: Search Newcastle University Library for this item

ISBN: 1424402662


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