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A comparative study of two blind FIR equalizers

A comparative study of two blind FIR equalizers
A comparative study of two blind FIR equalizers
The paper investigates blind finite-impulse-response (FIR) equalization schemes for quadrature amplitude modulation (QAM) signalling. We compare a bootstrap maximum a posteriori probability (MAP) equalizer with a recently introduced concurrent constant modulus algorithm (CMA) and decision directed (DD) equalizer (CMA+DD). Both equalizers are known to outperform the CMA considerably. The concurrent CMA+DD equalizer has a complexity that is slightly more than twice of the CMA, and the bootstrap MAP equalizer has computational requirements that are only slightly more complex than the CMA. Simulation results indicate that the bootstrap MAP blind FIR equalizer has a faster convergence rate than the concurrent CMA+DD blind FIR equalizer, but tuning of the former is more complicated than the latter.
18-36
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Cook, T.B.
1c3d17c6-194a-4393-a7f2-760f301541b9
Anderson, L.C.
76fdf619-5e0b-484f-afb4-8f8d7939ad59
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Cook, T.B.
1c3d17c6-194a-4393-a7f2-760f301541b9
Anderson, L.C.
76fdf619-5e0b-484f-afb4-8f8d7939ad59

Chen, S., Cook, T.B. and Anderson, L.C. (2004) A comparative study of two blind FIR equalizers. Digital Signal Processing, 14 (1), 18-36.

Record type: Article

Abstract

The paper investigates blind finite-impulse-response (FIR) equalization schemes for quadrature amplitude modulation (QAM) signalling. We compare a bootstrap maximum a posteriori probability (MAP) equalizer with a recently introduced concurrent constant modulus algorithm (CMA) and decision directed (DD) equalizer (CMA+DD). Both equalizers are known to outperform the CMA considerably. The concurrent CMA+DD equalizer has a complexity that is slightly more than twice of the CMA, and the bootstrap MAP equalizer has computational requirements that are only slightly more complex than the CMA. Simulation results indicate that the bootstrap MAP blind FIR equalizer has a faster convergence rate than the concurrent CMA+DD blind FIR equalizer, but tuning of the former is more complicated than the latter.

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Published date: January 2004
Additional Information: submitted for publication in Aug. 2001
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 258708
URI: https://eprints.soton.ac.uk/id/eprint/258708
PURE UUID: 5266ee55-ddfd-4dd9-ae7c-2d26caef97a4

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Date deposited: 05 Jan 2004
Last modified: 19 Jul 2019 22:42

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