Results 201 to 210 of about 35,772 (256)
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On-Chip Photonic-Assisted Instantaneous Microwave Frequency Measurement System
IEEE Photonics Technology Letters, 2013A novel instantaneous frequency measurement system based on a programmable photonic chip frequency discriminator is experimentally demonstrated. The microwave signal whose frequency is to be measured is used to modulate the phase of an optical carrier.
David Marpaung
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Photonic-based instantaneous microwave frequency measurement with extended range
Optics Communications, 2011A novel approach to extend the frequency range and improve the resolution of photonic techniques for microwave frequency measurements based on frequency-to-power mapping is demonstrated. The simultaneous use of several amplitude comparison functions allows the extension of the measurement beyond a single monotonic region. Experimental results between 7
B Vidal
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Instrument for the measurement of the instantaneous frequency
IMTC/99. Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference (Cat. No.99CH36309), 2000This paper describes the design and implementation of an instrument for the measurement of the instantaneous frequency of a signal. It is based on the extensive use of signal processing techniques and their implementation on efficient processors (digital signal processors).
Alfonso Carlosena +2 more
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Circuit for measurement of instantaneous frequency
American Journal of Physiology-Heart and Circulatory Physiology, 1980This paper describes a circuit that measures the instantaneous frequency of a pulse train applied to the input. Analog outputs are provided that are linearly proportional to the interval between successive pulses and to the reciprocal of that same interval.
R, McGillivray, R, Wald
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Broadband Instantaneous Frequency Measurement Receiver
The Herald of the Siberian State University of Telecommunications and Information Science, 2023This paper proposes a structure of a broadband instantaneous frequency measurement receiver consisting of an analog correlator and a digital frequency estimation calculation unit. A feature of this structure is the use of only two ADCs regardless of the width of the operating frequency range. Expansion of the frequency range is achieved through the use
P. I. Puzyrev +2 more
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Algorithmic Measurement of Digital Instantaneous Frequency
IEEE Transactions on Communications, 1976This paper presents an algorithmic method for measuring the instantaneous frequency of a uniformly sampled FM signal. The measured parameter, termed digital instantaneous frequency, is defined in a manner similar to that used to describe frequency-modulated, continuous-time signals.
Hussein S. El-Ghoroury +1 more
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Instantaneous measurement of a varying frequency
Journal of Scientific Instruments, 1952It is shown that it is possible to observe the instant of passage of a rapidly varying frequency through a specified value by beating it with a fixed frequency reference signal. The method is particularly suitable for frequency-time functions which are linear or have an inflexion at the point of observation.
L U Hibbard, D E Caro
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Frequency Relaying Based on Instantaneous Frequency Measurement
IEEE Power Engineering Review, 1996A frequency relay capable of under/over frequency and rate of change of frequency measurements has been implemented on a digital signal processor using an instantaneous frequency measuring algorithm. Careful attention to the filtering aspects of the relay is needed under dynamic conditions due to frequency modulation of the input signal.
P. J. Moore +2 more
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Superconductive digital instantaneous frequency measurement subsystem
IEEE Transactions on Microwave Theory and Techniques, 1993A 5-b high-temperature-superconductive digital instantaneous frequency-measurement (DIFM) subsystem has been constructed for the determination of the frequency of unknown signals over a 500-MHz bandwidth, centered on 4 GHz, with a resolution of +or-7.8 MHz. The subsystem contains a cryogenic section with five discriminator modules using superconductive
G.-C. Liang +5 more
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Instantaneous power measurement in time‐frequency domain
European Transactions on Electrical Power, 1996AbstractThe paper deals with an original application of the Short‐Time Fourier Transform (STFT) to instantaneous power measurements. This technique can be easily implemented in a dedicated instrument to perform accurate time‐frequency analysis of the time‐varying harmonic contents of network powers (in their active and imaginary components), which are ...
ANDRIA, Gregorio +2 more
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