Linewidth-tolerant real-time 40-Gbit/s 16-QAM self-homodyne detection using a pilot carrier and ISI suppression based on electronic digital processing

2009 ◽  
Vol 35 (1) ◽  
pp. 13 ◽  
Author(s):  
Moriya Nakamura ◽  
Yukiyoshi Kamio ◽  
Tetsuya Miyazaki
Keyword(s):  
Real Time ◽  
Digital Processing ◽  
Homodyne Detection

scholarly journals Digital Data Processing Methods for Estimating Tractive Force of Tractors

2021 ◽  
Vol 31 (1) ◽  
pp. 127-142
Author(s):  
Vyacheslav F. Fedorenko ◽  
Vitaly E. Tarkivskiy ◽  
Nikolay P. Mishurov ◽  
Nikolay V. Trubitsyn
Keyword(s):  
Real Time ◽  
Strain Gauge ◽  
Impulse Noise ◽  
Median Filter ◽  
Digital Processing ◽  
Operating Conditions ◽  
Measuring Instruments ◽  
Important Indicator ◽  
Tractive Effort ◽  
Useful Signal

Introduction. When carrying out an energy assessment of agricultural machines and traction tests of tractors, the most important indicator is the value of the tractive effort. The existing methods for determining the tractive effort of tractors imply the use of specialized measuring instruments, such as strain gauges and devices for processing and displaying information. The accuracy of determining the tractive effort is significantly influenced by the physical and mechanical properties of soil. To process the useful signal during the measurement of tractive effort, the data stream of the strain gauge sensor must be subjected to additional digital filtering taking into account the operating conditions of the agricultural unit. Materials and Methods. The functions of changing the tractive effort obtained on the K-744R2 tractor in various gears have been analyzed. An algorithm for digital processing of the signal of a strain gauge force meter based on a median filter has been developed that makes it possible to increase the measurement accuracy. The advantage of the proposed method is the ability to cut off sharp short-term impulse noise and sharp fluctuations in the amplitude of the measured value. Results. A method for determining the amount of tractive effort using median signal processing has been proposed. A device for determining the tractive effort during testing of agricultural tractors and units has been developed. The choice of the main components of the device for determining the magnitude of the tractive effort has been substantiated. As a result of the research, a device for measuring and digital processing of the signal of a force meter based on a microcontroller and specialized software for processing initial data in real time was designed and manufactured. Discussion and Conclusion. The developed method makes it possible to exclude the negative effect of impulse noise arising in the process of measuring the tractive effort of the tractor. The proposed device for measuring the tractive effort of tractors is compatible at the level of the exchange protocol with existing devices, has a high speed of operation in real time, multi-channel operation.

Fast real-time moment-ratio analysis of multibreath nitrogen washout in children

1985 ◽  
Vol 59 (4) ◽  
pp. 1137-1144 ◽  
Author(s):  
R. Kraemer ◽  
B. Meister
Keyword(s):  
Real Time ◽  
Time Moment ◽  
Digital Processing ◽  
Ratio Analysis ◽  
Delay Compensation ◽  
Ventilation Inhomogeneity ◽  
Moment Ratio ◽  
Residual Capacity ◽  
The Moment ◽  
Washout Curves

To apply real-time moment-ratio analysis to multibreath N2-washout curves (MBNW) from children, a new processor-controlled device was constructed. Flow and fractional N2 concentration (FN2) were each sampled by 200 Hz. An electromagnetic triple-valve system, with an instrumental dead space of 36 ml and a valve resistance of 0.3 cmH2O . l-1 . s, was connected in series with a pneumotachograph and an N2 analyzer (Ohio 720) placed next to the mouthpiece. A FORTRAN/MACRO program on a PDP 11/23 computer enabled measurement of inspiratory and expiratory flow and FN2 sampling by a 12-bit analog-to-digital converter. The fast real-time digital processing of the N2 and flow signals incorporated filtering, delay compensation, and corrections for the effects of changes in gas composition and temperature. MBNW dynamics of the lungs were studied in 17 healthy and 28 asthmatic children and in 16 patients with cystic fibrosis, evaluating the moment ratios of the washout curves as indices of the ventilation characteristics. Intrasubject variability of the moment ratios (m1/m0, m2/m0) and determination of functional residual capacity (FRC) varied between 6.3 and 14.7% (depending on which parameter is considered) and was comparatively lower than other indices previously investigated in adults. In addition, the sensitivity of the moment ratios for discriminating different stages of ventilation inhomogeneity was superior to other indices. m2/m0 is closely related to the simultaneously measured airway resistance, and the ratio between cumulative expired volume and FRC is correlated with the ratio between residual volume and total lung capacity.

Introduction of real-time digital processing techniques for the high-sensitivity GMI sensors

2019 ◽  
Vol 59 (2) ◽  
pp. 455-463
Author(s):  
Papa Silly Traore ◽  
Aktham Asfour ◽  
Jean Paul Yonnet ◽  
Cedric Boudinet
Keyword(s):  
Real Time ◽  
High Sensitivity ◽  
Digital Processing ◽  
Processing Techniques

A Real-Time Hardware System for Digital Processing of Wide-Band Video Images

1976 ◽  
Vol C-25 (11) ◽  
pp. 1089-1100 ◽  
Author(s):  
Gilbert ◽  
Storma ◽  
James ◽  
Hobrock ◽  
Yang ◽  
...  
Keyword(s):  
Real Time ◽  
Wide Band ◽  
Digital Processing ◽  
Hardware System ◽  
Video Images

Multiprocessor system for the real-time digital processing of video-image series / Ein Multiprozessorsystem für die digitale Verarbeitung von Fernsehbildserien in Echtzeit

1979 ◽  
Vol 21 (4) ◽  
Author(s):  
Nicolae G. C. ◽  
Κ. H. Höhne
Keyword(s):  
Real Time ◽  
High Speed ◽  
Digital Processing ◽  
Video Image ◽  
Multiprocessor System ◽  
The Real ◽  
Image Series ◽  
Data Rates ◽  
Structured Design Methods ◽  
Display Processor

In the course of a project for the analysis of X-ray picture series a new system for the digital processing of video-image series has been developed. It allows the real time digitization (up to 512 pixels/line, 8 bits/pixel), and high speed processing of video-picture series and a presentation of results in an easily interpretable way by a colour TV-display processor. As a characteristic of the system the extreme requirements concerning the digitization and processing speed (with data rates up to 80 Mbaud) are met by a realization in the form of a multiprocessor structure. The microprogrammed special processors communicate via a high speed asynchronous bus with a throughput of 15 Mwords/ s. Their functions are controlled by the commands of a host computer (e.g. PDP U/45). In order to achieve the above performance, structured design methods such as Petri-nets have been applied, which give rise to a more transparent design, better documentation and shorter implementation times. This paper describes the design, the structure, the programming and the application of the system.

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