Browsing by Keywords "Least squares approximations"
Now showing items 120 of 21

Adaptive filtering approaches for nonGaussian stable processes
(Institute of Electrical and Electronics Engineers, 1995)A large class of physical phenomenon observed in practice exhibit nonGaussian behavior. In this paper, αstable distributions, which have heavier tails than Gaussian distribution, are considered to model nonGaussian ... 
Adaptive methods for dithering color images
(Institute of Electrical and Electronics Engineers, 199707)Most color image printing and display devices do not have the capability of reproducing true color images. A common remedy is the use of dithering techniques that take advantage of the lower sensitivity of the eye to spatial ... 
Cumulant based identification approaches for nonminimum phase FIR systems
(IEEE, 1993)In this paper, recursive and least squares methods for identification of nonminimum phase linear timeinvariant (NMPLTI) FIR systems are developed. The methods utilize the second and thirdorder cumulants of the output ... 
Cumulantbased parametric multichannel FIR system identification methods
(Elsevier, 1994)In this paper, “least squares” and recursive methods for simultaneous identification of four nonminimum phase linear, timeinvariant FIR systems are presented. The methods utilize the second and fourthorder cumulants of ... 
Efficient evaluation of spatialdomain MoM matrix entries in the analysis of planar stratified geometries
(IEEE, 2000)An efficient hybrid method for evaluation of spatialdomain methodofmoments (MoM) matrix entries is presented in this paper. It has already been demonstrated that the introduction of the closedform Green's functions ... 
Enhancements to linear least squares localization through reference selection and ML estimation
(2008)Linear least squares (LLS) estimation is a low complexity but suboptimum method for estimating the location of a mobile terminal (MT) from some distance measurements. It requires selecting one of the fixed terminals (FTs) ... 
LMS based adaptive prediction for scalable video coding
(2006)3D video codecs have attracted recently a lot of attention, due to their compression performance comparable with that of stateofart hybrid codecs and due to their scalability features. In this work, we propose a least ... 
Lossless image compression by LMS adaptive filter banks
(Elsevier, 2001)A lossless image compression algorithm based on adaptive subband decomposition is proposed. The subband decomposition is achieved by a twochannel LMS adaptive filter bank. The resulting coefficients are lossy coded first, ... 
On the performance of linear leastsquares estimation in wireless positioning systems
(2008)A common technique for wireless positioning is to estimate timeofarrivals (TOAs) of signals traveling between a target node and a number of reference nodes, and then to determine the position of the target node based on ... 
Optimization of F2 layer parameters using IRIPlas and IONOLABTEC
(2011)In this study, the relation of the maximum ionization height (HmF2) and the critical frequency (FoF2) of F2 layer is examined within their parametric range through the International Reference Ionosphere extended towards ... 
Optimization of F2 layer parameters using IRIPlas model and IONOLAB Total Electron Content
(2011)In this study, the relation of the maximum ionization height (HmF2) and the critical frequency (FoF2) of F2 layer is examined within their parametric range through the International Reference Ionosphere extended towards ... 
Parallel minimum norm solution of sparse block diagonal column overlapped underdetermined systems
(Association for Computing Machinery, 2017)Underdetermined systems of equations in which the minimum norm solution needs to be computed arise in many applications, such as geophysics, signal processing, and biomedical engineering. In this article, we introduce a ... 
QRRLS algorithm for error diffusion of color images
(SPIE, 2000)Printing color images on color printers and displaying them on computer monitors requires a significant reduction of physically distinct colors, which causes degradation in image quality. An efficient method to improve the ... 
Range based sensor node localization in the presence of unknown clock skews
(2013)We deal with the positioning problem based on twoway timeofarrival (TWTOA) measurements in asynchronous wireless sensor networks. The optimal estimator for this problem poses a difficult global optimization problem. ... 
Recovery of sparse perturbations in Least Squares problems
(2011)We show that the exact recovery of sparse perturbations on the coefficient matrix in overdetermined Least Squares problems is possible for a large class of perturbation structures. The well established theory of Compressed ... 
Robust least squares methods under bounded data uncertainties
(Academic Press, 2015)We study the problem of estimating an unknown deterministic signal that is observed through an unknown deterministic data matrix under additive noise. In particular, we present a minimax optimization framework to the least ... 
Solution and cost analysis of general multichannel and multistage filtering circuits
(IEEE, Piscataway, NJ, United States, 1998)The fractional Fourier domain multichannel and multistage filtering configurations that have been recently proposed enable us to obtain either exact realizations or useful approximations of linear systems or matrixvector ... 
Static positioning using UWB range measurements
(2010)The performance of several existing and partly new algorithms for positioning of sensor node based on distance estimate is compared when the distance estimates are obtained from a measurement campaign. The distance estimates ... 
Theoretical limits and a practical estimator for joint estimation of respiration and heartbeat rates using UWB impulse radio
(2007)In this paper, CramerRao lower bounds are derived fo r joint estimation of respiration and heartbeat rates via impulse radio ultrawideband signals. Generic models are employed for displacement functions due to respiration ... 
Theoretical limits for estimation of vital signal parameters using impulse radio UWB
(2007)In this paper, CramerRao lower bounds (CRLBs) for estimation of vital signal parameters, such as respiration and heartbeat rates, using ultrawideband (UWB) pulses are derived. In addition, a simple closedform CRLB ...