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Improved time-base for waveform parameter estimation

B.C. Waltrip, O.B. Laug, G.N. Stenbakken
2001 IEEE Transactions on Instrumentation and Measurement  
An improved gated-oscillator time-base and associated auto-calibration algorithm for use in a high-accuracy sampling waveform acquisition system are described.  ...  The nominal. uncorrected linearity of the time-base is approximately \130 ps. By llsing an iterative, sine-fit based algorithm, the linearity has been improved to < \15 ps.  ...  Conclusions An improved time-base and auto-calibration system for use in a high-accuracy, equivalent time waveform acquisition system has been described.  ... 
doi:10.1109/19.948311 fatcat:agwety27lvfgvo2ya2utef7jfu

Optimal Waveform Selection for Robust Target Tracking

Fengming Xin, Jinkuan Wang, Qiang Zhao, Yuhuan Wang
2013 Journal of Applied Mathematics  
The optimal parameters for transmitted waveform are finally found by the minimization of the trace of the estimated state error covariance.  ...  A new optimal waveform selection algorithm is proposed based on game theory for robust tracking.  ...  The vector characterizes the waveform parameters at time k.  ... 
doi:10.1155/2013/725058 fatcat:zlgeipdpzzab3hoyprw7x2zlha

Improved Pulse Wave Velocity Estimation Using an Arterial Tube-Load Model

Mingwu Gao, Guanqun Zhang, N. Bari Olivier, Ramakrishna Mukkamala
2014 IEEE Transactions on Biomedical Engineering  
We developed techniques for improved estimation of PWV from the same waveforms.  ...  It is conventionally estimated by noninvasively measuring central and peripheral blood pressure (BP) and/or velocity (BV) waveforms and then detecting the foot-to-foot time delay between the waveforms  ...  (b) parameter estimation. (c) PWV Calculation. Fig. 3 . 3 Arterial tube-load model-based technique for estimating PWV from sequentially measured central and peripheral BP and/or BV waveforms.  ... 
doi:10.1109/tbme.2013.2291385 pmid:24263016 pmcid:PMC4527045 fatcat:g7qxcda3szbkfdsqvoznokbhue

Waveform Optimization for Target Estimation by Cognitive Radar with Multiple Antennas

Yu Yao, Junhui Zhao, Lenan Wu
2018 Sensors  
A new scheme based on Kalman filtering to optimize the waveforms of an adaptive multi-antenna radar system for target impulse response (TIR) estimation is presented.  ...  Finally, the simulation results show that, as compared with the waveform design method based on the MAP criterion, the proposed waveform design algorithm is able to improve the performance of TIR estimation  ...  Since we will consider the waveform design problem for target parameter estimation in the time variant radar scene, the dynamic model of the TIR should be established.  ... 
doi:10.3390/s18061743 pmid:29843453 pmcid:PMC6022000 fatcat:rf6z7pygmvc4xgzxj7a66wlpie

An Adaptive Transmitting Scheme for Interrupted Sampling Repeater Jamming Suppression

Chao Zhou, Feifeng Liu, Quanhua Liu
2017 Sensors  
The scheme firstly performs jamming perception to estimate the jamming parameters, then, on this basis, optimizes the waveform with genetic algorithm.  ...  by about 16 dB and 15 dB, respectively, for the case where the jamming-to-signal ratio (JSR) is 13 dB.  ...  1 µs Retransmitting time 2 Table 2 . 2 Simulation parameters for ISRJ.  ... 
doi:10.3390/s17112480 pmid:29109384 pmcid:PMC5712831 fatcat:ricwb23i5vgsrprbzrejgxcjue

Influence of voxel size on forest canopy height estimates using full-waveform airborne LiDAR data

Cheng Wang, Shezhou Luo, Xiaohuan Xi, Sheng Nie, Dan Ma, Youju Huang
2020 Forest Ecosystems  
Our findings demonstrate that the optimal voxel size need to be determined for improving estimation accuracy of forest parameter using small-footprint FWL data.  ...  Forest canopy height is a key forest structure parameter. Precisely estimating forest canopy height is vital to improve forest management and ecological modelling.  ...  Acknowledgements The authors would like to thank the anonymous reviewers for their thoughtful comments and suggestions on the manuscript.  ... 
doi:10.1186/s40663-020-00243-2 fatcat:qo4cas3qhvazpncwnxugz65w5q

Augmented kludge waveforms and Gaussian process regression for EMRI data analysis

Alvin J K Chua
2016 Journal of Physics, Conference Series  
Extreme-mass-ratio inspirals (EMRIs) will be an important type of astrophysical source for future space-based gravitational-wave detectors.  ...  There is a trade-off between accuracy and computational speed for the EMRI waveform templates required in the analysis of data from these detectors.  ...  Acknowledgements This talk was based on work done in collaboration with Jonathan Gair and Christopher Moore at the Institute of Astronomy, Cambridge.  ... 
doi:10.1088/1742-6596/716/1/012028 fatcat:aadbdrnjprha7ntixijhtas77e

A Method for Solving LiDAR Waveform Decomposition Parameters Based on a Variable Projection Algorithm

Ke Wang, Guolin Liu, Qiuxiang Tao, Luyao Wang, Yang Chen
2020 Complexity  
It can also provide a new method for parameter estimation in the Gaussian model for LiDAR waveform decomposition.  ...  Five groups of waveform decomposition simulation data and ICESat/GLAS satellite LiDAR waveform data were used for the parameter estimation experiments.  ...  traditional method for estimating waveform parameters.  ... 
doi:10.1155/2020/6726139 fatcat:xojjzhwvmzestn4caegc4vn5zu

Waveform-agile sensing for tracking

Sandeep P. Sira, Ying Li, Antonia Papandreou-Suppappola, Darryl Morrell, Douglas Cochran, Muralidhar Rangaswamy
2009 IEEE Signal Processing Magazine  
Waveform agility in active radar systems can provide performance improvements such as reduced target-tracking error, improved target detection, higher target identification accuracy, and increased efficiency  ...  exploited these features in their echolocation for millions of years [1], [16] .  ...  The waveforms can be designed directly based on their estimation resolution properties, selected from a class of waveforms with varying parameter values over a feasible sampling grid in the time-frequency  ... 
doi:10.1109/msp.2008.930418 fatcat:gg5pymctbnguhljvsf2glvgreu

Cognitive Waveform Design for Radar-Communication Transceiver Networks

Yu Yao, Lenan Wu
2018 Journal of Advanced Transportation  
A cognitive waveforms design approach, which is suitable for simultaneously performing both data communication and target detection, is presented.  ...  In addition to theoretical considerations, the simulation results show an improvement in target scattering coefficient (TSC) estimation and target detection probability as the number of iterations increases  ...  A new UWB-MPPSK modulation scheme is proposed for integrated waveform design. The Kalman filtering-based waveform optimization approach is addressed for improving the target estimation performance.  ... 
doi:10.1155/2018/4182927 fatcat:2msmwvrgffgtrg3ta6on2dyswa

Model-based data integration in clinical environments

T Heldt, G C Verghese
2010 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology  
We outline some of the challenges and opportunities, and propose strategies for model-based integration of physiological data to improve patient monitoring.  ...  As a result of improved hospital information-technology infrastructure and declining costs of storage media, vast amounts of physiological waveform and trend data can now be continuously collected and  ...  Intra-beat waveform analysis yields the desired parameters of resistance, compliance and intracranial pressure, whose estimation on a sliding window allows variations in the estimates from one beat to  ... 
doi:10.1109/iembs.2010.5626101 pmid:21095826 pmcid:PMC3786862 fatcat:gy7mwsnsgzaqdhvsix4jelinom

Emax monitoring by aortic pressure waveform analysis

Mingwu Gao, Mohsen Moslehpour, N. Bari Olivier, Ramakrishna Mukkamala
2014 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society  
We previously proposed a more practical technique for tracking Emax from just a single beat of an aortic pressure waveform based on a lumped parameter model of the left ventricle and arteries.  ...  Our results show that the estimated Emax changes corresponded fairly well to the reference changes, with a correlation coefficient of 0.793.  ...  So, a second potential improvement is to correct for any C a change using pulse transit time.  ... 
doi:10.1109/embc.2014.6945180 pmid:25571548 pmcid:PMC4527041 dblp:conf/embc/GaoMOM14 fatcat:ox55pd4zpzhrvnicj3yfb6i6wm

System Optimization for Temporal Correlated Cognitive Radar with EBPSK-Based MCPC Signal

Peng Chen, Lenan Wu
2015 Mathematical Problems in Engineering  
further improved by 90% by optimizing the transmitted waveform spectrum.  ...  At the estimation stage, an approach based on Kalman filtering (KF) is proposed to estimate target scattering coefficients (TSC), and the estimation performance is improved significantly by exploiting  ...  For example, the parameters of EBPSK modulation are according to [20, 21, [27] [28] [29] , and the parameters for the characteristics of target and radar are based on [5, 14] .  ... 
doi:10.1155/2015/302083 fatcat:ifslmatazfdx7bn2o5vlx7zvc4

A modification to the group delay and simulated annealing technique for characterization of peripheral nerve fiber size distributions for non-deterministic sampled data

R.B. Szlavik
2009 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society  
The ability to determine the characteristics of peripheral nerve fiber size distributions would provide additional information to clinicians for the diagnosis of specific pathologies of the peripheral  ...  While the peripheral nerve conduction velocity test can provide useful information to the clinician regarding the viability of the nerve under study, it is a single parameter test that yields no detailed  ...  Initially, sampled waveforms are shifted such that their centroids are coincident with the propagation delay parameter for each fiber estimate.  ... 
doi:10.1109/iembs.2009.5334609 pmid:19965031 fatcat:porbelkvtzfs7jv6vvprjizoqq

Parameter estimation of coalescing supermassive black hole binaries with LISA

K. G. Arun
2006 Physical Review D  
For an equal mass binary of 2×10^6M_ at a luminosity distance of 3 Gpc, the improvement in chirp mass is ∼ 11 Estimation of coalescence time t_c worsens by 43 for the unequal mass binary mergers.  ...  The estimation of the mass parameters M and η are significantly enhanced by using the 3.5PN waveform instead of the 2PN one.  ...  Conversations with B S Sathyaprakash on issues related the parameter estimation with LISA and his encouragement to pursue this problem are gratefully acknowledged.  ... 
doi:10.1103/physrevd.74.024025 fatcat:lhp5pi33qfhvbeykuc5zknbnbu
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