A linearly-constrained approach to the interpolated FIR filtering problem

Resende, L.S.; Rocha, Carlos A. F. da; Bellanger, Maurice

doi:10.1109/icassp.2000.861987

Cited by 9 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A novel AIFIR scheme where the interpolator is rendered adaptive is discussed and designed with both MMSE and MV design criteria. The new scheme, introduced in [25], [26], yields a performance superior to conventional AIFIR schemes [22], [23] (where the interpolator is fixed) and a faster convergence performance than full-rank and other existing reduced-rank receivers. Computationally efficient stochastic gradient (SG) and recursive least squares (RLS) type adaptive algorithms are developed for the new structure based upon the MMSE and MV performance criteria with appropriate constraints to mitigate MAI, ISI and jointly estimate the channel.…”

Section: Introductionmentioning

confidence: 99%

“…This technique exhibits desirable properties, such as guaranteed stability, absence of limit cycles and low computational complexity. Thus, adaptive IFIR (AIFIR) filters [22], [23] represent an interesting alternative for substituting classical adaptive FIR filters. In some applications they show better convergence rate and can reduce the computational burden for filtering and coefficient updating, due to the reduced number of adaptive elements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adaptive Interference Suppression for DS-CDMA Systems Based on Interpolated FIR Filters With Adaptive Interpolators in Multipath Channels

Lamare

Sampaio‐Neto

2007

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Article:de Lamare, Rodrigo C. and Sampaio-Neto, Raimundo (2007) ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract-In this paper, we propose an adaptive linear-receiver structure based on interpolated finite-impulse response (FIR) filters with adaptive interpolators for direct-sequence code-division multiple-access (DS-CDMA) systems in multipath channels. The interpolated minimum mean-squared error (MMSE) and the interpolated constrained minimum-variance (CMV) solutions are described for a novel scheme, where the interpolator is rendered time-varying in order to mitigate multiple-access interference and multiple-path propagation effects. Based upon the interpolated MMSE and CMV solutions, we present computationally efficient stochastic gradient and exponentially weighted recursive least squares type algorithms for both receiver and interpolator filters in the supervised and blind modes of operation. A convergence analysis of the algorithms and a discussion of the convergence properties of the method are carried out for both modes of operation. Simulation experiments for a downlink scenario show that the proposed structures achieve a superior bit-error-rate convergence and steady-state performance to previously reported reduced-rank receivers at lower complexity.Index Terms-Adaptive algorithms, direct-sequence codedivision multiple access (DS-CDMA), multiuser detection, reduced-rank receivers.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adaptive Interference Suppression for DS-CDMA Systems Based on Interpolated FIR Filters With Adaptive Interpolators in Multipath Channels

Lamare

Sampaio‐Neto

2007

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

show abstract

“…Interpolated FIR (IFIR) filters [5], [6] have been widely applied in the context of digital filtering, although their use for parameter estimation in communications remains unexplored. These structures retain the advantages of original FIR filters, show better convergence rate and can reduce the computational burden for parameter estimation, due to the reduced number of elements.…”

Section: Introductionmentioning

confidence: 99%

“…In this letter, a novel IFIR scheme for the suppression of MAI and ISI with IFIR filters is proposed and supervised and blind solutions for both interpolator and receiver are presented. The new structure uses a more effective time-varying interpolator rather than the fixed interpolator approach of [6].…”

Section: Introductionmentioning

confidence: 99%

Reduced-rank interference suppression for DS-CDMA based on interpolated FIR filters

Lamare

Sampaio‐Neto

2005

IEEE Commun. Lett.

View full text Add to dashboard Cite

Reduced-rank receivers based on interpolated finite impulse response (FIR) filters for direct sequence code division multiple access (DS-CDMA) systems are proposed and a novel scheme where the interpolator is rendered time-varying is introduced. The interpolated minimum mean squared error (MMSE) and constrained minimum variance (CMV) solutions are derived for both receiver and interpolator to mitigate multiple access interference (MAI) and intersymbol interference (ISI) in a downlink scenario.

show abstract

“…Recentemente, a filtragem de Wiener interpolada foi tratada como um problema de otimização com restrições lineares [4]- [6]. Uma nova estrutura de implementação foi apresentada e o filtro ótimo de Wiener interpolado foi definido.…”

Section: Introductionunclassified

Análise de Degradação do Cancelador de Eco Híbrido FIR-IFIR

Coradine¹,

Resende²,

Rocha³

et al. 2004

Anais Do XXI Simpósio Brasileiro De Telecomunicações

View full text Add to dashboard Cite

In this paper, we present an analysis of the degradation introduced by the interpolated filter into the FIR-IFIR hybrid echo canceller. Through a joint approach combining interpolated transversal filtering and linearlyconstrained optimization, the optimum filters are determined and a degradation measure, which is a function of the input signal correlation, of the IFIR filter sparseness degree and of the interpolator parameters, is obtained.

show abstract

A linearly-constrained approach to the interpolated FIR filtering problem

Cited by 9 publications

References 4 publications

Adaptive Interference Suppression for DS-CDMA Systems Based on Interpolated FIR Filters With Adaptive Interpolators in Multipath Channels

Adaptive Interference Suppression for DS-CDMA Systems Based on Interpolated FIR Filters With Adaptive Interpolators in Multipath Channels

Reduced-rank interference suppression for DS-CDMA based on interpolated FIR filters

Análise de Degradação do Cancelador de Eco Híbrido FIR-IFIR

Contact Info

Product

Resources

About