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

Samila, Andriy; Hotra, O.; Majewski, Jacek

doi:10.3390/s21186029

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…It shifts signals around the intermediate frequency bandwidth closer to the baseband and applies extraction filtering. This reduces the sampling rate required for reception, preserves useful signals, and significantly alleviates the workload on DSPs [1]. Digital downconversion has been widely applied in fields such as military communications, broadcasting, television, and radar navigation systems, providing them with robust signal processing capabilities [2].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Signal Processing Through FPGA-Based Digital Downconversion via the CORDIC Algorithm

Yin,

Jiang

2024

JII

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To address the rate matching issue between high-bandwidth and high-sampling-rate analog-to-digital converters (ADCs) and low-bandwidth and low-sampling-rate baseband processors, the key technology of digital downconversion is introduced. This approach relocates the intermediate-frequency baseband signal to a vicinity of the baseband, laying a foundation for subsequent Digital Signal Processor (DSP) analysis and processing. In an innovative application of the Coordinate Rotation Digital Computer (CORDIC) algorithm for Numerically Controlled Oscillator (NCO) in a pipeline design, the phase differences of five parallel signals are measured, facilitating real-time parallel processing of the phase and amplitude relationships of multiple signals. The Field Programmable Gate Array (FPGA) design and implementation of the digital mixer module and filter bank for digital downconversion have been accomplished. A test board for the direction-finding application of five digital downconversion channels has been constructed, with the FMQL45T900 as its core. The correctness of the direction-finding data has been validated through practical application, demonstrating a significant improvement in power consumption compared to methods documented in other literature, thereby enhancing overall efficiency. The digital downconversion technology based on the CORDIC algorithm is applicable in various fields, including military communications, broadcasting, and radar navigation systems.

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Section: Introductionmentioning

confidence: 99%

Enhanced Signal Processing Through FPGA-Based Digital Downconversion via the CORDIC Algorithm

Yin,

Jiang

2024

JII

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“…are those that integrate all main functionalities inside the digital domain on FPGA with high levels of integration and miniaturization. Some portable spectrometers use FPGA as the basis for integration of almost all functionalities [22]- [25]. Other portable and miniature spectrometers were developed using existing standard development platforms, such as Terasic DE0-nano, LMS7002M, and Ettus N200 [26]- [29].…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Validation of a SoC-FPGA-Based Compact NQR Spectrometer

Kachkachi,

Gansmuller,

Rabah

2024

IEEE Trans. Instrum. Meas.

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Nuclear Quadrupolar Resonance (NQR) is a radio frequency spectroscopy technique providing high resolution molecular analysis of solid materials containing quadrupolar atomic nuclei. The NQR technique does not necessitate an external magnetic field and, therefore, permits a large number of applications; it nevertheless suffers from relatively low sensitivity. The challenges of NQR instrumentation are therefore to increase its portability and sensitivity, and to limit interference from various noise sources (e.g., radio frequency interference) in order to perform field applications outside the laboratory. To address these challenges, we present a System-on-Chip Field-Programmable Gate Array (SoC-FPGA) based portable spectrometer integrating the major hardware elements of NQR instrumentation. These include : a high pulse width resolution pulse programmer, a fully controllable pulse transmitter, an acquisition module that performs detection, digital signal processing and storage of the acquired signal in an external memory, in addition to a hardware debugger. Pulser and acquisition Linux applications are embedded on the SoC-FPGA. While many recent compact spectrometers still have crucial radio frequency (RF) parts in the analog domain and lack performance optimization, most of our hardware and software modules are digitally implemented on SoC-FPGA. The designed portable spectrometer was successfully tested by detecting the expected frequencies of several samples such as N aN O2, HM T or 1, 3, 5 − T CB covering hence the typical 14 N and 35 Cl NQR frequency ranges.

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Broadband transfer of binary images via optically long wire media

et al. 2023

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In the paper the binary mechanism of the long-distance image transfer in a wire-medium (WM) endoscope is suggested and studied. We have shown that a discrete image formed by a set of point sources TM-polarized with respect to the WM can be transferred from the input to the output of the endoscope in a very broad frequency band. The underlying physics is the formation of local channels by a group of four adjacent wires. It allows the transfer of the near field beyond the Fabry–Perot resonances at which the known canalization mechanism offers the image. Both numerical simulations and experimental measurements confirm the deeply subwavelength resolution on the output WM interface. The binary imaging was studied until the frequencies at which the endoscope length exceeds 5λ. The transfer is possible in the entire investigated frequency range (from 1 up to 4 GHz) except for the frequencies where the Fabry–Perot resonance are not enough suppressed.

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

Cited by 5 publications

References 20 publications

Enhanced Signal Processing Through FPGA-Based Digital Downconversion via the CORDIC Algorithm

Enhanced Signal Processing Through FPGA-Based Digital Downconversion via the CORDIC Algorithm

Design and Experimental Validation of a SoC-FPGA-Based Compact NQR Spectrometer

Broadband transfer of binary images via optically long wire media

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