نتایج جستجو برای: sage algorithm

تعداد نتایج: 759272  

Journal: :Atmospheric Measurement Techniques 2013

Journal: :IEEE Trans. Signal Processing 1997
Timothy J. Schulz

y In this paper, a space-alternating generalized expectation-maximization (SAGE) algorithm is presented for the numerical computation of maximum-likelihood (ML) and penalized maximum-likelihood (PML) estimates of the parameters of covariance matrices with linear structure for complex Gaussian processes. By using a less informative hidden-data space and a sequential parameter-update scheme, a SA...

2007
Harun Bodur Celal Alp Tunc Defne Aktas Vakur B. Erturk Ayhan Altintas

This paper presents an application of Particle Swarm Optimization (PSO) in Space Alternating Generalized Expectation Maximization (SAGE) algorithm. SAGE algorithm is a powerful tool for estimating channel parameters like delay, angles (azimuth and elevation) of arrival and departure, Doppler frequency and polarization. To demonstrate the improvement in processing time by utilizing PSO in SAGE a...

2002
Chia-Chin Chong David I. Laurenson Chor Min Tan Steve McLaughlin Mark A. Beach Andrew R. Nix

In this paper, the serial interference cancellation (SIC) technique and the frequency domain SAGE (FD-SAGE) algorithm are jointly used to detect and estimate the radio channel parameters of interest. The implementation of the SAGE algorithm in the frequency domain is novel. Furthermore, the parallel interference cancellation (PIC) technique in the standard SAGE algorithm is replaced by the SIC ...

Time-Delay-Estimation (TDE) has been a topic of interest in many applications in the past few decades. The emphasis of this work is on the application of model-based estimation (MBE) for TDE of ultrasonic signals used in ultrasonic thickness gaging. Ultrasonic thickness gaging is based on precise measurement of the time difference between successive echoes which reflect back from the back wall ...

2007
Felix Antreich

The potential of the SAGE (Space Alternating Generalized Expectation Maximization) algorithm for navigation systems in order to distinguish the line-of-sight signal (LOSS) is to be considered. The SAGE algorithm is a low-complexity generalization of the EM (Expectation-Maximization) algorithm, which iteratively approximates the maximum likelihood estimator (MLE) and has been successfully applie...

Journal: :PLoS ONE 2008
Olena Morozova Vyacheslav Morozov Brad G. Hoffman Cheryl D. Helgason Marco A. Marra

BACKGROUND Serial Analysis of Gene Expression (SAGE) is a DNA sequencing-based method for large-scale gene expression profiling that provides an alternative to microarray analysis. Most analyses of SAGE data aimed at identifying co-expressed genes have been accomplished using various versions of clustering approaches that often result in a number of false positives. PRINCIPAL FINDINGS Here we...

Journal: :Monthly Notices of the Royal Astronomical Society 2011

2004
Vikram Krishnamurthy

The Iterated Extended Kalman smoother (IEKS) is shown to be equivalent to one iteration of the Expectation Maximisation (EM)-based SAGE algorithm for the class of nonlinear signal models containing polynomial dynamics. Thus the IEKS is a maximum a posteriori (MAP) state sequence estimator for this class of systems. The Iterated Extended Kalman filter (IEKF) can be thought of as a heuristic, onl...

Journal: :Bioinformatics 2004
Viatcheslav R. Akmaev Clarence J. Wang

MOTIVATION Serial Analysis of Gene Expression (SAGE) is a powerful technology for measuring global gene expression, through rapid generation of large numbers of transcript tags. Beyond their intrinsic value in differential gene expression analysis, SAGE tag collections afford abundant information on the size and shape of the sample transcriptome and can accelerate novel gene discovery. These la...

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