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检索条件"主题词=Affine Projection Algorithm"

共 142 条记录，以下是51-60 订阅

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M-estimate affine projection algorithm Based On Correntropy Induced Metric 5th

M-estimate Affine Projection Algorithm Based On Correntropy ...

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5th IFAC Symposium on Telematics Applications (TA)

作者： Liu, Bing Zhao, Haiquan Southwest Jiaotong Univ Key Lab Magnet Suspens Technol & Maglev Vehicle Minist Educ Chengdu 610031 Sichuan Peoples R China Southwest Jiaotong Univ Sch Elect Engn Chengdu 610031 Sichuan Peoples R China

In this paper, an M-estimate affine projection algorithm based on correntropy induced metric (MAPA-CIM) is proposed for robust sparse adaptive filtering. The proposed MAPA-CIM algorithm uses an M-estimate robust cost function with correntropy induced metric, which is derived by using the unconstrained minimization method. Simulation results show that the proposed MAPA-CIM algorithm has better convergence speed and lower steady-state misalignment for sparse system identification and echo cancellation scenarios in non-Gaussian environments with colored input signal over the usual adaptive filtering algorithms. Copyright (C) 2019. The Authors. Published by Elsevier Ltd. All rights reserved.

关键词： M-estimate affine projection algorithm correntropy induced metric sparse system identification non-Gaussian environments

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A WIDELY LINEAR affine projection algorithm

A WIDELY LINEAR AFFINE PROJECTION ALGORITHM

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15th IEEE/SP Workshop on Statistical Signal Processing

作者： Xia, Yili Took, Clive Cheong Javidi, Soroush Mandic, Danilo P. Univ London Imperial Coll Sci Technol & Med Dept Elect & Elect Engn London SW7 2BT England

ISBN: (纸本)9781424427093

A widely linear affine projection algorithm (WL-APA) utilising the full second order statistical information in the complex domain C is proposed. It is based on recent developments in augmented complex statistics, CR calculus, and the widely linear modelling in C, making it suitable for the processing of noncircular complex valued signals. Simulations on circular and noncircular benchmark and real-world noncircular wind signals show the effectiveness of WL-APA as compared to standard APA.

关键词： Widely linear modelling affine projection algorithm complex-valued noncircular signals augmented complex statistics augmented CLMS (ACLMS)

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An affine projection algorithm Based DFE with Set-Membership Filtering

An Affine Projection Algorithm Based DFE with Set-Membership...

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5th International Conference on Computers and Devices for Communication (CODEC)

作者： Mishra, Ramesh Chandra Bhattacharjee, Ratnajit Mitra, Abhijit Indian Inst Technol Dept EEE Gauhati Assam India Sir JC Bose Sch Engg Dept ECE Hooghly W Bengal India

ISBN: (纸本)9781467326209;9781467326193

A channel equalization technique based on the affine projection algorithms (APA) with set-membership (SM) filtering for updating filters of a decision feedback equalizer (DFE) is proposed for time-varying wireless channels. The performance of the proposed approach is analyzed through simulations. It is shown in the results that this scheme offers advantages of having substantial fewer number of weight updating operations at moderate SNR with almost similar convergence as normal APA based equalizer. The introduced equalizer converges faster with a marginal increase in complexity than the set-membership normalized least mean square (NLMS) algorithm based equalizer.

关键词： affine projection algorithm Decision feedback equalizer Normalized least mean square algorithm Set-membership

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A VARIABLE STEP-SIZE PROPORTIONATE affine projection algorithm FOR NETWORK ECHO CANCELLATION

A VARIABLE STEP-SIZE PROPORTIONATE AFFINE PROJECTION ALGORIT...

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16th International Conference on Digital Signal Processing

作者： Liu, Ligang Fukumoto, Masahiro Zhang, Shiyong Fudan Univ Sch Comp Sci Shanghai 200433 Peoples R China Kochi Univ Technol Dept Informat Syst Engn Kami Kochi 7828502 Japan

ISBN: (纸本)9781424432974

For a network canceler, whose input is mainly speech, the proportionate affine projection algorithm (PAPA) is expected to present faster convergence speed than the existing proportionate NLMS algorithms. However, the performance criteria of fast convergence speed conflicts with low steady-state misalignment when a constant step-size parameter is applied. In this article we introduce a variable step-size technique into the PAPA in order to achieve both fast convergence speed and low steady-state misalignment. Simulation results show that the proposed approach can greatly improve the steady-state misalignment without sacrificing the fast convergence speed of the PAPA.

关键词： Adaptive filter network echo cancellation proportionate adaptive algorithm affine projection algorithm variable step-size sparse impulse response

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Adaptive Distributed Incremental Networks Based on the Selective Partial Update affine projection algorithm

Adaptive Distributed Incremental Networks Based on the Selec...

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21st Iranian Conference on Electrical Engineering (ICEE)

作者： Danaee, Ali-Reza Abadi, Mohammad Shams Esfand Shahid Rajaee Teacher Training Univ Fac Elect & Comp Engn Tehran Iran

ISBN: (纸本)9781467356343

This paper presents the problem of distributed estimation in an adaptive incremental network based on the selective partial update affine projection algorithm (SPU-APA). In dSPU-APA, the weight coefficients are partially updated at each node during the adaptation. The distributed SPU-APA (dSPU-APA) has low computational complexity feature and close convergence speed to ordinary dAPA. The good performance of dSPU-APA is demonstrated by several computer simulations in distributed network.

关键词： affine projection algorithm adaptive distributed estimation incremental network selective partial update

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HARMONIC DETECTION USING AN affine projection algorithm FOR ACTIVE POWER FILTER

HARMONIC DETECTION USING AN AFFINE PROJECTION ALGORITHM FOR ...

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IEEE China Summit & International Conference on Signal and Information Processing

作者： Zhao, Haiquan Lei, Yilong Southwest Jiaotong Univ Sch Elect Engn Chengdu 610031 Peoples R China

ISBN: (纸本)9781479919482

With the development of adaptive filter theory, many adaptive filtering techniques are used for harmonic current detection, and achieved some good results. However, conventional algorithms still have some poor properties, such as low accuracy and slow convergence rate. Based on adaptive noise cancellation theory, this paper proposed a variable step size affine projection algorithm (VSS-APA) for harmonic current detection. The step size of the proposed method is updated by the coherence average estimation of the proportion denoted by the error signal in the total signal. The VSS-APA has fast convergence rate and good tracking performance of fundamental and harmonic components from distorted signals, and simulation results prove the algorithm having a good feature.

关键词： variable step size affine projection algorithm active filter adaptive harmonic detecting method

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Speech Enhancement Using affine projection algorithm in Subband

Speech Enhancement Using Affine Projection Algorithm in Subb...

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International Conference on Multimedia Computing and Systems

作者： Mahabadi, Ali Ameri Eshghi, Mohammad Shahid Beheshti Univ Dept Elect & Comp Engn Tehran Iran Shahid Beheshti Univ Fac Elect & Comp Engn Tehran Iran

ISBN: (纸本)9781424437566

In this paper, a novel structure is proposed in order to improve the functionality of Adaptive Noise Cancellers (ANC);for this purpose affine projection algorithm (APA) has been used. We exploit the Stationary Wavelet Transform (SWT) to decompose the input signals in subbnad to achieve a higher convergence rate. The reason of using SWT (an oversampled filter bank) is to reduce the effect of aliasing which produces some disturbance on the adaptive process. Since In the higher frequency subbands, there is no noticeable difference between APA and simpler approaches such as spectral subtraction or Wiener filter, these algorithms are substituted instead of APA for the sake of complexity. Simulation results show that the proposed ANC performance is better than the conventional ANC which uses adaptive algorithm in the time domain.. The results of subjective and objective tests confirm this fact.

关键词： affine projection algorithm spectral subtraction stationary wavelet transform wiener filter

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SPARSE CONSTRAINT affine projection algorithm WITH PARALLEL IMPLEMENTATION AND APPLICATION IN COMPRESSIVE SENSING

SPARSE CONSTRAINT AFFINE PROJECTION ALGORITHM WITH PARALLEL ...

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IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

作者： Yin, Dong So, H. C. Gu, Yuantao Tsinghua Univ Tsinghua Natl Lab Informat Sci & Technol Beijing 100084 Peoples R China City Univ Hong Kong Dept Elect Engn Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781479928934

Based on affine projection algorithm (APA) in adaptive filtering and the technique of parallel computing, we propose a novel algorithm called l(0)-APA with its parallel implementation for sparse system identification and sparse signal recovery. For sparse system identification, parallel l(0)-APA can serve as an effective approach for practical hardware implementation, since it lowers the requirement on the processors' clock speed. For sparse signal recovery, it can significantly reduce the convergence time. Prior algorithms such as l(0)-LMS and l(0)-ZAP can be seen as special cases of l(0)-APA. Finally the performance of the proposed algorithm is analyzed and verified by numerical experiments.

关键词： affine projection algorithm parallel implementation steady-state behavior transient behavior compressive sensing

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VARIABLE STEP SIZE DICHOTOMOUS COORDINATE DESCENT affine projection algorithm

VARIABLE STEP SIZE DICHOTOMOUS COORDINATE DESCENT AFFINE PRO...

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International IEEE Conference Devoted to the 150-Anniversary of Alexander S Popov

作者： Albu, Felix Paleologu, Constantin Benesty, Jacob Zakharov, Yuriy V. Univ Politehn Bucuresti Dept Telecommun Bucharest Romania

ISBN: (纸本)9781424439676

A new affine projection (AP) algorithm based on dichotomous coordinate descent (DCD) iterations has been recently proposed for acoustic echo cancellation (AEC). It uses a constant step size parameter and, therefore, has to compromise between fast convergence and tracking on the one hand, and low misadjustment and robustness to the presence and variations of a near-end signal on the other hand. In this paper we propose a variable step-size (VSS) version of the DCD-AP algorithm (VSS-DCD-AP) that does not require any a priori information about the acoustic environment. It is shown that the new algorithm is robust against near-end signal variations, including double-talk (DT).

关键词： dichotomous coordinate descent algorithm affine projection algorithm acoustic echo cancellation double-talk

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AN ADAPTIVE FILTER BASED ON WAVELET TRANSFORM AND affine projection algorithm

AN ADAPTIVE FILTER BASED ON WAVELET TRANSFORM AND AFFINE PRO...

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2010 International Conference on Wavelet Analysis and Pattern Recognition

作者： Wu, Wei-Wei Wang, Yan-Song Zhang, Jue-Cheng Shanghai Univ Engn Sci Shanghai 201620 Peoples R China

ISBN: (纸本)9781424465316

Based on the wavelet transform (WT) and the affine projection algorithm, a new adaptive filter with a variable step-size scheme, so-called WAPA filter, is proposed in this paper. The computation performance of the WAPA filter is further verified by some numerical simulations and engineering applications. Comparing with the traditional affine projection algorithm (APA), the newly proposed algorithm can provide a faster convergence speed with the same mean square errors (MSE). This implies that the WAPA order may be reduced for a same filtering result;and the saved computation time may counteract the computation expenses of the wavelet transform. The faster convergence speed and the lower steady state MSE (or mis-adjustment) can be attributed to the variable step-size scheme adopted in the WAPA, which is much better than the normal variable step-size APAs.

关键词： Wavelet transform affine projection algorithm Adaptive filter Variable step-size scheme

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