Filters








131,356 Hits in 7.0 sec

Suppression of Random Valued Impulse Noise in Image Processing: A Review
english

Varsha R. Pardeshi, Rohita P. Patil
2015 International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering  
This paper illustrates the survey of different low complexity methods such as Median, Adaptive Center Weighted Median (ACWM), Adaptive Median Filter (AMF) and high complexity methods such as Alpha-trimmed  ...  In the process of impulse noise filtering it is necessary to preserve edges and details of the image. Also to avoid image smoothing, only corrupted pixel must be filtered.  ...  It performs well and results in better output with the use of single thresholding technique.  ... 
doi:10.15662/ijareeie.2015.0401017 fatcat:mvhvm6ily5gdfhhgeyiqjoynmi

Adaptive reduced-rank interference suppression based on the multistage Wiener filter

M.L. Honig, J.S. Goldstein
2002 IEEE Transactions on Communications  
Unlike the Principal Components method for reduced-rank filtering, the algorithms presented can achieve near full-rank performance with a filter rank much less than the dimension of the signal subspace  ...  A class of adaptive reduced-rank interference suppression algorithms is presented based on the multi-stage Wiener filter (MSWF).  ...  ACKNOWLEDGMENT The authors thank a careful reviewer for detailed comments which helped to improve the paper significantly.  ... 
doi:10.1109/tcomm.2002.1010618 fatcat:sls2zrqugvh77kpyrgkaoausqi

Adaptive Low-rank Constrained Constant Modulus Beamforming Algorithms using Joint Iterative Optimization of Parameters [article]

Lei Wang, Rodrigo C. de Lamare
2013 arXiv   pre-print
It consists of a bank of full-rank adaptive filters that forms a transformation matrix and an adaptive reduced-rank filter that operates at the output of the bank of filters.  ...  This paper proposes a robust reduced-rank scheme for adaptive beamforming based on joint iterative optimization (JIO) of adaptive filters.  ...  The proposed reduced-rank scheme consists of a bank of full-rank adaptive filters, which constitutes the transformation matrix, and an adaptive reduced-rank filter that operates at the output of the bank  ... 
arXiv:1303.3638v1 fatcat:prf4feumrrgvtlh734mkpdnhbq

Adaptive Reduced-Rank Constrained Constant Modulus Algorithms Based on Joint Iterative Optimization of Filters for Beamforming

Lei Wang, Rodrigo C. de Lamare, Masahiro Yukawa
2010 IEEE Transactions on Signal Processing  
The proposed scheme consists of a bank of full-rank adaptive filters that forms the transformation matrix, and an adaptive reduced-rank filter that operates at the output of the bank of filters to estimate  ...  This paper proposes a robust reduced-rank scheme for adaptive beamforming based on joint iterative optimization (JIO) of adaptive filters.  ...  The developed CCM reduced-rank scheme consists of a bank of full-rank adaptive filters, which constitutes the transformation matrix, and an adaptive reduced-rank filter that operates at the output of the  ... 
doi:10.1109/tsp.2010.2044250 fatcat:xex4tncornfilplsbe2glkmy3q

Exploiting the Underdetermined System in Multichannel Active Noise Control for Open Windows

Jianjun He, Bhan Lam, Dongyuan Shi, Woon Seng Gan
2019 Applied Sciences  
Both the full-rank and the overdetermined optimal control filters are realized.  ...  The performance of these control methods was analyzed numerically with the Finite Element Method (FEM) and the results validate the feasibility of the full-rank and overdetermined optimal control methods  ...  of Electronic Science and Technology of China for the fruitful discussions and constructive comments on this work.  ... 
doi:10.3390/app9030390 fatcat:74y5o4tbk5bvlh3rw63qtd62hq

Large System Transient Analysis of Adaptive Least Squares Filtering

W. Xiao, M.L. Honig
2005 IEEE Transactions on Information Theory  
Index Terms-Adaptive filter, large system analysis, least squares (LS), reduced-rank filters.  ...  The performance of adaptive least squares (LS) filtering is analyzed for the suppression of multiple-access interference.  ...  ACKNOWLEDGMENT The authors wish to thank M. Peacock and the anonymous reviewers for their comments and corrections to the original manuscript, and R.  ... 
doi:10.1109/tit.2005.850081 fatcat:u6bvfljdpvhavlp65rzxalfatm

Interaction Mechanism of Flavonoids and α-Glucosidase: Experimental and Molecular Modelling Studies

He, Liu, Jiang, Geng, Ma, Liu
2019 Foods  
To explain the significant differences in activity, the interaction behaviors of myricetin and dihydromyricetin, which have similar structures, were compared by spectrofluorimetry, molecular docking, and  ...  In this study, the α-glucosidase inhibitory activities of 15 flavonoids were investigated.  ...  of Electronic Science and Technology of China for the fruitful discussions and constructive comments on this work.  ... 
doi:10.3390/foods8090355 pmid:31438605 pmcid:PMC6770089 fatcat:3anuibxpvrerjepfqglrhw4hbi

Adaptive turbo reduced-rank equalization for MIMO channels

Yakun Sun, V. Tripathi, M.L. Honig
2005 IEEE Transactions on Wireless Communications  
The adaptive reduced-rank turbo DFE for single-input/single-output channels is extended to multiple-input/multiple-output (MIMO) channels with ISI and multiple receive antennas.  ...  Adaptive reduced-rank estimation methods are also presented, based on the multistage Wiener filter (MSWF).  ...  The associated performance is compared with the turbo DFE using a channel estimate, and the stochastic-gradient DFE. The reduced-rank turbo DFE is also introduced in this section.  ... 
doi:10.1109/twc.2005.858037 fatcat:mhc5cbdpxje55n2qrzn24kynxi

Performance of reduced-rank linear interference suppression

M.L. Honig, Weimin Xiao
2001 IEEE Transactions on Information Theory  
The performance of reduced-rank linear filtering is studied for the suppression of multiple-access interference.  ...  We evaluate the large system output signal-to-interference plus noise ratio (SINR) as a function of filter rank for the multistage Wiener filter (MSWF) presented by Goldstein and Reed.  ...  This is a simple reduced-rank technique that allows the selection of MSE performance between the matched and full-rank MMSE filters by adjusting the number of adaptive filter coefficients. IV.  ... 
doi:10.1109/18.930928 fatcat:spc5fyxmp5htbnzqojwcztqlze

Using Recommendation Systems to Adapt Gameplay

Ben Medler
2009 International Journal of Gaming and Computer-Mediated Simulations  
This paper examines how current web application recommendation systems compare to current games that adapt their gameplay to specific users.  ...  Design suggestions for how game developers may exploit the utility of these recommendation features are discussed and examined.  ...  Input, Filter, Output The three phases of a recommendation system: input, filtering, and output, rely heavily on how a system sets up the connections between the system's users and items.  ... 
doi:10.4018/jgcms.2009070105 fatcat:q5oaq32rlvdlvlcxaybwizlyxu

Reduced-rank Adaptive Constrained Constant Modulus Beamforming Algorithms based on Joint Iterative Optimization of Filters [article]

Lei Wang, Rodrigo C. de Lamare
2013 arXiv   pre-print
This paper proposes a reduced-rank scheme for adaptive beamforming based on the constrained joint iterative optimization of filters.  ...  The first devised algorithm is formulated as a constrained joint iterative optimization of a projection matrix and a reduced-rank filter with respect to the CM criterion subject to a constraint on the  ...  Here, r < m is the rank and, as we will see, impacts the output performance. An adaptive reduced-rank filter represented byw(i) = [w1(i), . . .  ... 
arXiv:1303.1571v1 fatcat:cvqlieijurcftbh3icwjjczrsi

Space-Time Decorrelating Rake Receiver In Multipath Cdma Channel

Y. Fung C., S.C. Chan, K.W. Tse
2002 Zenodo  
Publication in the conference proceedings of EUSIPCO, Toulouse, France, 2002  ...  MAI and channel noise are decorrelated and suppressed in the constrained adaptive filter, the signal-tointerference-and noise ratio (SINR) of the filter outputs is high such that the optimum combining  ...  Figure 2 shows the block diagram of the l-arm of the constrained adaptive filter utilizing a rank-4 MSWF.  ... 
doi:10.5281/zenodo.54048 fatcat:nozdemlhxna3xjpu3iq4dmu6q4

Reduced-Rank Adaptive Filtering Based on Joint Iterative Optimization of Adaptive Filters

Rodrigo C. de Lamare, Raimundo Sampaio-Neto
2007 IEEE Signal Processing Letters  
The novel scheme consists of a joint iterative optimization of a bank of full-rank adaptive filters that forms the projection matrix and an adaptive reduced-rank filter that operates at the output of the  ...  We describe minimum mean-squared error (MMSE) expressions for the design of the projection matrix and the reduced-rank filter and low-complexity normalized least-mean squares (NLMS) adaptive algorithms  ...  and an adaptive reduced-rank filter that operates at the output of the bank of full-rank filters.  ... 
doi:10.1109/lsp.2007.907995 fatcat:7jx5unay25fgjhbe4uunnf3ody

PERFORMANCE COMPARISON OF BLIND ADAPTIVE MULTIUSER DETECTION ALGORITHMS

Khalifa Hunki .
2013 International Journal of Research in Engineering and Technology  
Subspace-based Kalman filter algorithm has faster convergence speed, more practical and the capability of CDMA system can be increased.  ...  The resultant signal to interference ratio (SIR) at the output of the receivers controlled by the four kinds of multi-user detection algorithm has been discussed in this paper.  ...  Compared with the LMS approach in [3] and the RLS approach in [6] , this detector demonstrates lower steady-state excess output energy in adaptation.  ... 
doi:10.15623/ijret.2013.0211067 fatcat:u65o2rmbwjffhauxg7ywiofrsa

Reduced-Rank STAP Schemes for Airborne Radar Based on Switched Joint Interpolation, Decimation and Filtering Algorithm

Rui Fa, Rodrigo C. de Lamare, Lei Wang
2010 IEEE Transactions on Signal Processing  
The proposed STAP method performs dimensionality reduction by using a reduced-rank switched joint interpolation, decimation and filtering algorithm (RR-SJIDF).  ...  The output is switched to the branch with the best performance according to the minimum variance criterion.  ...  the rank of the proposed SJIDF scheme are developed. v) A study and comparative analysis of reduced-rank STAP techniques for radar systems is carried out.  ... 
doi:10.1109/tsp.2010.2048212 fatcat:vvnrs7d53vazdmrtc6cdz5xake
« Previous Showing results 1 — 15 out of 131,356 results