scholarly journals Improved Intra-Pulse Modulation Phase Calibration Algorithm With Accelerated Entropy Minimization Optimization

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 164623-164640
Author(s):  
Yue Lu ◽  
Shiyou Xu ◽  
Yue Zhang ◽  
Qi Wu ◽  
Zengping Chen
Keyword(s):  
Pulse Modulation ◽  
Entropy Minimization ◽  
Calibration Algorithm ◽  
Phase Calibration ◽  
Modulation Phase

EVALUATION AND COMPENSATION OF SYSTEMATIC ERRORS OF CALIBRATION OF MATRIX SIMULATOR

2018 ◽  
pp. 24-28
Author(s):  
A. V. Kiselev ◽  
A. O. Podkopaev ◽  
M. A. Stepanov
Keyword(s):  
Phase Error ◽  
Precise Determination ◽  
Random Component ◽  
Compensation Error ◽  
The Matrix ◽  
Calibration Algorithm ◽  
Phase Calibration ◽  
Analytical Relations ◽  
Theoretical Results

The problem of phase calibration of the matrix simulator is considered. The phase error at the point of reception is divided into systematic and random. Analytic relationships are obtained that allow one to evaluate and compensate for the systematic error in the calibration of the phases of the signals emitted by the matrix simulator, caused by the geometric separation of the phase centers of the antenna and the antenna of the calibration receiver. The random component of the phase error is compensated by the calibration algorithm. Analytical relations are obtained for determining the compensation error due to the non-precise determination of the coordinates of the emitting part of the matrix simulator and the phase center of the antenna of the measuring receiver. The magnitude of this error is determined for the typical location of the antennas of the device under investigation, the measuring receiver and the matrix simulator when performing semi-realistic simulation. The description of the laboratory stand of the developer of the matrix imitator is given. The obtained theoretical results are confirmed experimentally at the booth of the matrix imitator developer.

Demonstration of digital pulse modulation of a grating-surface-emitting diode laser

1990 ◽  
Vol 26 (20) ◽  
pp. 1695
Author(s):  
N.W. Carlson ◽  
D.R. Patterson ◽  
P.J. Stabile ◽  
S.K. Liew ◽  
D.P. Bour ◽  
...  
Keyword(s):  
Diode Laser ◽  
Pulse Modulation ◽  
Digital Pulse

scholarly journals Minimization of the Line Resistance Impact on Memdiode-Based Simulations of Multilayer Perceptron Arrays Applied to Pattern Recognition

2021 ◽  
Vol 11 (1) ◽  
pp. 9
Author(s):  
Fernando Leonel Aguirre ◽  
Nicolás M. Gomez ◽  
Sebastián Matías Pazos ◽  
Félix Palumbo ◽  
Jordi Suñé ◽  
...  
Keyword(s):  
Pattern Recognition ◽  
Ex Situ ◽  
Multilayer Perceptrons ◽  
Spice Simulation ◽  
Large Dataset ◽  
High Line ◽  
Calibration Algorithm ◽  
The Impact ◽  
Line Resistance

In this paper, we extend the application of the Quasi-Static Memdiode model to the realistic SPICE simulation of memristor-based single (SLPs) and multilayer perceptrons (MLPs) intended for large dataset pattern recognition. By considering ex-situ training and the classification of the hand-written characters of the MNIST database, we evaluate the degradation of the inference accuracy due to the interconnection resistances for MLPs involving up to three hidden neural layers. Two approaches to reduce the impact of the line resistance are considered and implemented in our simulations, they are the inclusion of an iterative calibration algorithm and the partitioning of the synaptic layers into smaller blocks. The obtained results indicate that MLPs are more sensitive to the line resistance effect than SLPs and that partitioning is the most effective way to minimize the impact of high line resistance values.

scholarly journals Durable Continuous-Flow Mechanical Circulatory Support: State of the Art

Hearts ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 127-138
Author(s):  
Antonio Loforte ◽  
Luca Botta ◽  
Silvia Boschi ◽  
Gregorio Gliozzi ◽  
Giulio Giovanni Cavalli ◽  
...  
Keyword(s):  
Heart Transplantation ◽  
Continuous Flow ◽  
Mechanical Circulatory Support ◽  
State Of The Art ◽  
Ease Of Use ◽  
Circulatory Support ◽  
Pulse Modulation ◽  
Ventricular Assist ◽  
Old Patients ◽  
Number Of Patients

Implantable mechanical circulatory support (MCS) systems for ventricular assist device (VAD) therapy have emerged as an important strategy due to a shortage of donor organs for heart transplantation. A growing number of patients are receiving permanent assist devices, while fewer are undergoing heart transplantation (Htx). Continuous-flow (CF) pumps, as devices that can be permanently implanted, show promise for the treatment of both young and old patients with heart failure (HF). Further improvement of these devices will decrease adverse events, enable pulse modulation of continuous blood flow, and improve automatic remote monitoring. Ease of use for patients could also be improved. We herein report on the current state of the art regarding implantable CF pumps for use as MCS systems in the treatment of advanced refractory HF.

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