An RF-SoC-Based Ultra-Wideband Chirp Synthesizer

Reyhanigalangashi, Omid; Taylor, Drew; Kolpuke, Shriniwas; Elluru, Deepak N.; Abushakra, Feras; Awasthi, Abhishek K.; Gogineni, Siva-Prasad

doi:10.1109/ACCESS.2022.3171830

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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An RF-SoC-Based Ultra-Wideband Chirp Synthesizer

2022
By Reyhanigalangashi, Omid ; Taylor, Drew ; Kolpuke, Shriniwas ; ...
Source: IEEE Access, 10, 47715-47725

[PDF-3.20 MB]

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Journal Title:

IEEE Access
Personal Author:

Reyhanigalangashi, Omid ; Taylor, Drew ; Kolpuke, Shriniwas ; Elluru, Deepak N. ; Abushakra, Feras ; ... More +

Reyhanigalangashi, Omid ; Taylor, Drew ; Kolpuke, Shriniwas ; Elluru, Deepak N. ; Abushakra, Feras ; Awasthi, Abhishek K. ; Gogineni, Siva-Prasad Less -
NOAA Program & Office:

NWS (National Weather Service) ; NESDIS (National Environmental Satellite, Data, and Information Service)

NWS (National Weather Service) ; NESDIS (National Environmental Satellite, Data, and Information Service) Less -
Description:

This paper presents the design and development of a digital two-channel chirp synthesizer using a field-programmable gate array (FPGA) device. To achieve an integrated solution, the design was implemented on radio-frequency system-on-chip (RF-SoC) technology that includes digital-to-analog converters (DACs) and other radio-frequency components on-chip. To overcome the timing errors in high-speed design with DACs operating at 6.144 GHz, a memory-stitching concept was used. A prototype was developed to validate this concept by generating a baseband chirp with a bandwidth of 1.7 GHz and a sweep time of 36 μs . The synthetic chirp was upconverted to 3.572-5.272 GHz for use as the transmit signal for an ultra-wideband radar to characterize the chirp using a 1 km long optical delay line. The transmit signal was analyzed in terms of phase and amplitude errors and corrected for these errors. The root-mean-square (RMS) frequency deviation of the predistorted chirp from linearity over the 1.7 GHz bandwidth is 9.64 kHz, realizing a chirp linearity of 0.00057%. The measurement data show comparable performance of our chirp synthesizer against a commercially available arbitrary-waveform-generator (AWG) operating at a sampling rate of 60 GHz. The reported chirp synthesizer can be used in frequency-modulated continuous-wave (FM-CW) and stretch radars. Such radars are widely used for a variety of remote sensing measurements.
Keywords:

[+]

Radar Radio Frequency Remote Sensing Chirp Clocks Electrical And Electronic Engineering Field Programmable Gate Arrays General Computer Science General Engineering General Materials Science Radar Remote Sensing Synthesizers Timing
Source:

IEEE Access, 10, 47715-47725
DOI:

https://doi.org/10.1109/ACCESS.2022.3171830
Document Type:

Journal Article
Funding:

Grant no. NA18NWS4620043B ; Grant no. ; NA19NES4320002

Grant no. NA18NWS4620043B ; Grant no. ; NA19NES4320002 Less -
License:

https://creativecommons.org/licenses/by/4.0/
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CC BY
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Submitted
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urn:sha256:7ae34a20a8922a0d8cc74a00a08b9dbd0a9ffadd4d289254a96e026cb411702d
Download URL:

https://repository.library.noaa.gov/view/noaa/48180/noaa_48180_DS1.pdf
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An RF-SoC-Based Ultra-Wideband Chirp Synthesizer

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