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Filters
Three-Wheeled Omnidirectional Robot Localization in RFID-Tag Environments using UFIR Filtering
2021
WSEAS Transactions on Signal Processing
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To increase the localization accuracy, the Kalman filter (KF) and unbiased finite impulse response (UFIR) modified for CMN are used. ...
A measurement system measures distances from the tags to the robot with in the presence of the firstorder Markov-Gauss colored measurement noise (CMN) and is combined with a digital gyroscope to measure ...
Another solutions were found by Shmaliy et al. to deal with the colored process noise using state differencing [23] , Zhou et al. by using the second moment of information [24] , and Ding et al. by applying ...
doi:10.37394/232014.2021.17.2
fatcat:wry57xgxibgnbb7qjonkzllfzq
Estimation efficiency and statistical power in arterial spin labeling fMRI
2006
NeuroImage
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While this process can reduce the number of time points by half, it simplifies the subsequent signal and noise models (i.e., smoothed boxcar predictors and white noise). ...
While the models using differenced data may seem easier to implement, we show that differencing models fit with ordinary least squares either produce biased estimates of the standard errors or suffer from ...
Acknowledgments This work is supported by NIH grants R01 DA15410 and R01 EB004346-01A1. ...
doi:10.1016/j.neuroimage.2006.05.040
pmid:16860577
pmcid:PMC2772871
fatcat:s2xpx6l6hnb77iskglseh34hii
Kalman and UFIR State Estimation with Colored Measurement Noise using Backward Euler Method
2019
IET Signal Processing
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In this study, the authors modify the KF and unbiased finite impulse response (UFIR) filter using the backward Euler (BE) method for models with coloured measurement noise (CMN), which better fits systems ...
Under coloured noise, known modifications of the Kalman filter (KF) exist only for discrete-time state-space models produced by the forward Euler (FE) method, which fits with feedback control. ...
The optimal Kalman gain and error covariance were used here as derived in [15] for correlated noise. ...
doi:10.1049/iet-spr.2019.0166
fatcat:kpvk6ov6tjbrlpwdz3tapmxpjm
Estimating and interpreting the instantaneous frequency of a signal. II. Algorithms and applications
1992
Proceedings of the IEEE
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Guidelines are given as to which estimation method should be used for a given signal class and signal-to-noise ratio (SNR). ...
IF is extended to be able to cope with discrete time signals. The specific problem explored is that of estimating the IF of frequency modulated (FM) discrete-time signals imbedded in Gaussian noise. ...
O'Shea and B. Ristic for their contribution and help in the preparation of the manuscript as well as L. B. White and D. Gray for reviewing the manuscript. ...
doi:10.1109/5.135378
fatcat:tj4f3oo2m5dsrg4pixdbm36xn4
SCIENTIFIC VERIFICATION OF FARADAY ROTATION MODULATORS: DETECTION OF DIFFUSE POLARIZED GALACTIC EMISSION
2013
Astrophysical Journal
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The features exhibit strong agreement with BICEP's measurements of the Galaxy using non-FRM pixels and with the Galactic polarization models. ...
This marks the first detection of high signal-to-noise mm-wave celestial polarization using fast, active optical modulation. ...
Non-FRM data were processed using the same analysis pipeline as the FRM data with a few exceptions. The initial deconvolution was applied with a low-pass filter at 5 Hz. ...
doi:10.1088/0004-637x/765/1/64
fatcat:57xi4nacezaczkfi5pxiihsree
A fast and accurate single frequency estimator
1989
IEEE Transactions on Acoustics Speech and Signal Processing
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The process is actually a moving average with coefficients 1 and -1. ...
o r t = 0, 1, * . . , N -2, which becomes, from (3), It is clear from ( 5 ) that the problem now is to estimate the mean, wo, of a colored Gaussian noise process. ...
doi:10.1109/29.45547
fatcat:eptsi6k4njarldhlvpezn4m4ku
Spacecraft Angular Rate Estimation from Magnetometer Data Only Using an Analytic Predictor
2004
Journal of Guidance Control and Dynamics
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Colored Noise Modeling A first-order Markov process is used to model the colored mea- surement noise
n= Pi ny, 1+ We] (12)
where the matrix ®; is related to the noise decorrelation time and w, is a zero-mean ...
The measurement noise, rendered colored by the differencing involved with the filter’s implementation, is han- died via approximate Markov modeling and application of Bryson and Henrikson’s reduced-order ...
doi:10.2514/1.10332
fatcat:2i33n266kbff3kgksq3qpvrjdm
Accurate and Standardized Coronary Wave Intensity Analysis
2017
IEEE Transactions on Biomedical Engineering
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Methods: The novel approach combines an adaptive Savitzky-Golay filter with high-order central finite differencing after ensemble-averaging the acquired waveforms. ...
Results: The automatic cWIA algorithm provided satisfactory accuracy under a wide range of noise scenarios (≤10% and ≤20% error in the estimation of wave areas and peaks, respectively). ...
This problem, as shown in [24] , can be solved pointwise by optimizing the Stein's unbiased risk estimator (SURE) objective [25] , which is an unbiased estimator of the mean squared error. ...
doi:10.1109/tbme.2016.2593518
pmid:28113201
fatcat:dxwzwcual5cypeoa5vpbnqym6q
PROPER IMAGE SUBTRACTION—OPTIMAL TRANSIENT DETECTION, PHOTOMETRY, AND HYPOTHESIS TESTING
2016
Astrophysical Journal
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Furthermore, we present extensions of this method that make it resilient to registration errors, color-refraction errors, and any noise source that can be modelled. ...
Due to the varying seeing conditions, the image subtraction process is non-trivial, and existing solutions suffer from a variety of problems. ...
Registration and color-refraction errors Image subtraction relies on many steps taken prior to the differencing process. ...
doi:10.3847/0004-637x/830/1/27
fatcat:ugfryvbjk5bvxijetd3ic2dq34
Gravity Error Compensation Using Second-Order Gauss-Markov Processes
2013
Journal of Spacecraft and Rockets
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Nazarenko and Alfriend [13] developed an approach for estimating the colored noise parameters in the orbit determination process for correlation functions of gravity disturbing forces. ...
The system dynamics were defined earlier by Eqs. (3) and (4) where the observation noise €(f) is postulated uncorrelated and the dynamic noise n(f) is a colored, time-correlated, dynamic Gaussian noise ...
doi:10.2514/1.a32262
fatcat:im4rjgn3qnf2pgtgqwty5do4c4
Novel prior position determination approaches in particle filter for ultra wideband (UWB)‐Based indoor positioning
2021
Navigation
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The test result shows that the particle filter with the proposed approaches performs similarly to the Rao-Blackwellized particle filter and slightly better than the particle filter with IMU. ...
Compared with the standard particle filter, the particle filters with our proposed approaches achieve similar positioning accuracies with less computation time. ...
For an unbiased assessment in our test, the standard deviations of the process and measurement noises used in the test are shown in Table 2 . ...
doi:10.1002/navi.415
fatcat:vcgmtf74nzdgxn7ovj5ixo2nxq
SELECTION OF BURST-LIKE TRANSIENTS AND STOCHASTIC VARIABLES USING MULTI-BAND IMAGE DIFFERENCING IN THE PAN-STARRS1 MEDIUM-DEEP SURVEY
2015
Astrophysical Journal
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image-differencing time-series data. ...
We use three deterministic light-curve models to fit burst-like transients and one stochastic light curve model, the Ornstein-Uhlenbeck process, in order to fit variability that is characteristic of active ...
We thank the referee and the scientific editor for insightful comments and suggestions. ...
doi:10.1088/0004-637x/802/1/27
fatcat:jx3r6tktw5bnrnr2t7typl2lui
Making maps of cosmic microwave background polarization forB-mode studies: the POLARBEAR example
2017
Astronomy and Astrophysics
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Filtering is frequently used to minimize the impact of low frequency noise, atmospheric contributions and/or scan synchronous signals on the resulting maps. ...
We then study the effects of time-domain filtering on the noise correlation structure in the map domain, as well as impact it may have on the performance of the popular pseudo-spectrum estimators. ...
Consequently, using the optimal weight, C −1 n , in the map-making process may be difficult. ...
doi:10.1051/0004-6361/201629467
fatcat:4tr667basnfjbj7xrvs4kjlstq
SECOND AND THIRD SEASON QUaD COSMIC MICROWAVE BACKGROUND TEMPERATURE AND POLARIZATION POWER SPECTRA
2009
Astrophysical Journal
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For the implemented data cuts and processing technique such contamination is undetectable. ...
We report results from the second and third seasons of observation with the QUaD experiment. ...
The color scale is ±20 μK. These maps have been apodized and filtered to enhance signal to noise-see the text for details. ...
doi:10.1088/0004-637x/692/2/1247
fatcat:dravo22shff4jbiucjrei2jjyq
On a unified framework for linear nuisance parameters
2017
EURASIP Journal on Advances in Signal Processing
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., the reference choice is actually not important for the differencing process. ...
a reference and then taking differences between the reference and the observations, which we will refer to as "differential signal processing." ...
For the OSP-based estimation, in order to remove the impact of u, using P ⊥ G actually colors the noise, but using U T n keeps the model noise white. ...
doi:10.1186/s13634-016-0438-8
fatcat:dmwwuwza6nbmrdrdf2uux6ymeu
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