Waveform generation for the digital synthesis systems based on embedded hardware

Samila, Andriy; Lastivka, Galina; Politansky, Leonid; Kazemirskiy, Taras

doi:10.1109/tcset.2018.8336326

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…As one of the main requirements in the formation of NQR excitation pulses is the stability of the carrier frequency and the ability to quickly reconfigure the amplitude, frequency and phase, it was decided, with regard to the results of our previous analytical studies, to use the tabular method of direct digital frequency synthesis to generate radio frequency oscillations [ 24 , 25 ].…”

Section: Methods Of Configuring Devices Based On the Syntax Of Modeling Dynamic Modes Of Logical Structuresmentioning

confidence: 99%

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

Samila

Hotra

Majewski

2021

Sensors

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This paper presents a method for implementing the configuration structure of an integrated computational core of a pulsed nuclear quadrupole resonance (NQR) sensor based on a field-programmable gate array (FPGA), which comprises the following modules: a three-channel direct digital synthesizer (DDS), a pulse sequence shaper and a software-defined radio. Experimental studies carried out using the in-circuit analyzer SignalTap Logic Analyzer have confirmed the reliability of the correct and stable operation of the functional modules of the configuration structure at all stages of signal transformations, starting from the formation of the envelope of the excitation pulses and ending with the obtainment of low-frequency quadrature signals at the outlet of the compensating filters. The time and frequency dependences of the amplitude of the output signals generated using the DDS based on a 48 bit phase accumulator are investigated. This development can be used when creating pulsed coherent NQR sensors in the frequency range of 1 MHz–50 MHz.

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Section: Methods Of Configuring Devices Based On the Syntax Of Modeling Dynamic Modes Of Logical Structuresmentioning

confidence: 99%

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

Samila

Hotra

Majewski

2021

Sensors

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“…In more detail, this block diagram and the principle of operation are described in paper [1]. Some parts and units of the proposed device are described in detail in papers [14][15][16][17][18][19].…”

Section: Measuring Setup For the Study Of Nqrmentioning

confidence: 99%

A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals

Hotra

Samila

2020

Electronics

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A low-cost digital pulsed nuclear quadrupole resonance (NQR) radio-spectrometer is proposed, all main modules of digital processing and synthesis of which on the field-programmable gate array (FPGA) are implemented. The input sensitivity of the device is of the order of 3 μV to 5 μV which allows conducting NQR studies in samples of relatively small dimensions. The application of the developed methods of NQR pulsed radio spectroscopy made it possible to increase spectral resolution, improve spectral shape and significantly reduce the time of research. In the case of studying InSe and GaSe crystals, spectra with signal-to-noise ratio (SNR) values of 41.9 dB were observed in samples with a volume of 0.1 cm3. As the results of the research have shown, the characteristics of the proposed spectrometer make it effective when used to observe free induction decay (FID) signals of a significant number of isotopes of elements with quadrupolar nuclei.

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Waveform generation for the digital synthesis systems based on embedded hardware

Cited by 2 publications

References 1 publication

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

Implementation of the Configuration Structure of an Integrated Computational Core of a Pulsed NQR Sensor Based on FPGA

A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals

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