FPGA-based implementation of a chirp signal generator using an OpenCL design

Firmansyah, Iman; Yamaguchi, Yoshiki

doi:10.1016/j.micpro.2020.103199

Cited by 12 publications

(4 citation statements)

References 21 publications

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“…In experiments, such a tailored chirp waveform is achievable through various techniques [28][29][30][31][32].…”

Section: Plasma Sourcementioning

confidence: 99%

Numerical characterization of capacitively coupled plasma driven by tailored frequency modulated radio frequency source

Wang,

Zhou,

Chen

et al. 2024

Plasma Sources Sci. Technol.

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Capacitively coupled plasma (CCP) is widely used in plasma etching and deposition processes because of its low cost, simple structure, and easy generation of a uniform plasma in large areas. Conventional CCPs are operated under a fixed frequency power source; however, CCPs driven by a variable frequency power source are poorly understood. In this paper, numerical simulations of CCPs driven by frequency modulated (FM) radio frequency (RF) sources within the frequency range of 2 MHz to 18 MHz are carried out with a Particle-in-Cell/Monte Carlo collision model. Our research indicates that the CCP driven by an FM RF source can maintain a stable glow discharge and form a time-dependent plasma. Plasma density, electron and ion current, energy and heating rate, ion flux, and energy on the electrodes fluctuate consistently with the FM period. The electron and ion energy distribution function can also be modulated by the frequency variation of the FM source. A multi-peak structure that varies and shifts with frequency variation is observed in the ion energy distribution function. In addition, by fixing the chirp period while varying the start or end frequency of the chirp signal (start frequency from 0.4 to 6 MHz, or end frequency from 18 to 48 MHz), effective modulations can be produced on the electron density, electron energy, and the shape of the EEPF and IEDF.

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“…In experiments, such a tailored chirp waveform is achievable through various techniques [28][29][30][31][32].…”

Section: Plasma Sourcementioning

confidence: 99%

Numerical characterization of capacitively coupled plasma driven by tailored frequency modulated radio frequency source

Wang,

Zhou,

Chen

et al. 2024

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Field-Programmable Gate Array (FPGA) technology has been frequently mentioned in research that suggests methods for creating chirp signal generators [2][3][4]. Through programmable interconnects, an FPGA's configurable logic blocks (CLBs), lookup tables (LUTs), block RAMs, and DSP blocks can be configured or reprogrammed to meet the specific requirements of a given application.…”

Section: Introductionmentioning

confidence: 99%

The signal generator: A critical analysis of its basic principles, applications, and development

Liu

2024

ACE

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The signal generator is a fundamental electronic device used in a wide range of applications, from communication systems to research fields. This paper provides a comprehensive overview of the basic principles, applications, and development of signal generators. Beginning with an introduction to the signal generator and its importance in various fields, the paper delves into its basic information, including the definition, types, basic components, and working principles. The applications of signal generators in communication, research, and software implementation are then discussed. The development of modern signal generators and their specifications are analyzed, followed by a comparison with previous technologies. The design of a signal generator based on FPGA is presented, including the working principles and advantages of FPGA, results and data, and the problems solved by FPGA. Finally, the paper concludes with key findings, limitations, and future issues.

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“…This signal has a bandwidth of 100 MHz and a chirp rate of 5 MHz/s. Another technique, proposed in [17], uses OpenCL approach to generate digital chirp signals on Altera Cyclone V FPGA. In [18], an FPGA Virtex-2 was used to produce IR-UWB impulse signals that had a bandwidth of 41.5 MHz and a center frequency of 110.25 MHz.…”

Section: Introductionmentioning

confidence: 99%

Development of an Ir-Uwb Radar System for High-Resolution Through-Wall Imaging

Saad¹,

Maali²,

Azzaz³

et al. 2022

PIER C

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Through-Wall-Imaging (TWI) radar offers considerable advantages for applications that require safety and security, such as disaster survivor rescue and tracking terrorist activities. In such situations, the use of an impulse UWB radar system is constantly increasing due to its ability to provide precise images of hidden targets in a short period of time. This paper presents a new radar system for through-wall imaging using an impulse-radio ultra-wideband (IR-UWB) signal. The radar system is built using a field-programmable gate array (FPGA) board, an oscilloscope, and Vivaldi antennas. The radar system transmits impulse signals, which have a monocycle shape with a 400-picosecond duration and a 4.6 GHz bandwidth. The FPGA board is used to produce impulse signals that have a short time duration in the sub-nanosecond range in order to expand the bandwidth of the generated signal and make the developed radar capable of providing high-resolution images. The FPGA-based implementation of the IR-UWB generator offers the flexibility to modify the spectrum characteristics of the generated signal. The receiver side of the radar system collects the echoes using the principle of synthetic aperture radar (SAR), and then the time-domain back-projection algorithm is applied to the radar echo to form 2D images. An indoor imaging experiment was carried out with two human targets to investigate the imaging capability of the designed IR-UWB radar. The obtained experimental results demonstrate that this radar has the potential to deliver high-resolution images of multiple human targets and identify their locations.

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FPGA-based implementation of a chirp signal generator using an OpenCL design

Cited by 12 publications

References 21 publications

Numerical characterization of capacitively coupled plasma driven by tailored frequency modulated radio frequency source

Numerical characterization of capacitively coupled plasma driven by tailored frequency modulated radio frequency source

The signal generator: A critical analysis of its basic principles, applications, and development

Development of an Ir-Uwb Radar System for High-Resolution Through-Wall Imaging

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