Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors
Phase noise significantly degrades the performance of frequency-modulated continuous wave (FMCW)- and chirp sequence (CS)-based radar sensors. Knowledge of the power spectral density (PSD) of these sensors is therefore essential for estimating their limitations. This work presents a test setup where...
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IEEE
2024-01-01
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| Series: | IEEE Journal of Microwaves |
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| Online Access: | https://ieeexplore.ieee.org/document/10714376/ |
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| author | Christoph Birkenhauer Peter Tschapek Martin Vossiek |
| author_facet | Christoph Birkenhauer Peter Tschapek Martin Vossiek |
| author_sort | Christoph Birkenhauer |
| collection | DOAJ |
| description | Phase noise significantly degrades the performance of frequency-modulated continuous wave (FMCW)- and chirp sequence (CS)-based radar sensors. Knowledge of the power spectral density (PSD) of these sensors is therefore essential for estimating their limitations. This work presents a test setup where over-the-air (OTA) tests can be carried out and the PSD extracted directly from the signal radiated from a radar sensor operating in the <inline-formula><tex-math notation="LaTeX">$76 \,\mathrm{G}\mathrm{Hz}$</tex-math></inline-formula>–<inline-formula><tex-math notation="LaTeX">$81 \,\mathrm{G}\mathrm{Hz}$</tex-math></inline-formula> automotive frequency band. For this, the radar signal is demodulated in the analog domain by mixing it with a delayed version of the received signal. Demodulation compresses the signal bandwidth, simplifying hardware requirements for sampling and signal processing. The remaining systematic errors are compensated and the range correlation effect is corrected by an appropriate signal processing scheme. Our approach eliminates the need for prior knowledge of modulation parameters, leading to both increased precision and reduced potential for errors. The proposed setup is validated comparing system measurements with data obtained from established testing methods and simulations.The presented setup successfully demonstrates the capability of performing OTA test measurements of a PSD from a FMCW sensor. Our results demonstrate good agreement between the PSD test results and the expected outcome. |
| format | Article |
| id | doaj-art-4525dba393ed4b9aa11a8e4f945ae43d |
| institution | Kabale University |
| issn | 2692-8388 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Microwaves |
| spelling | doaj-art-4525dba393ed4b9aa11a8e4f945ae43d2024-12-17T00:01:34ZengIEEEIEEE Journal of Microwaves2692-83882024-01-014473374110.1109/JMW.2024.347180310714376Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar SensorsChristoph Birkenhauer0https://orcid.org/0009-0002-1444-9805Peter Tschapek1https://orcid.org/0000-0003-2540-7707Martin Vossiek2https://orcid.org/0000-0002-8369-345XInstitute of Microwaves and Photonics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, GermanyInstitute of Microwaves and Photonics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, GermanyInstitute of Microwaves and Photonics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, GermanyPhase noise significantly degrades the performance of frequency-modulated continuous wave (FMCW)- and chirp sequence (CS)-based radar sensors. Knowledge of the power spectral density (PSD) of these sensors is therefore essential for estimating their limitations. This work presents a test setup where over-the-air (OTA) tests can be carried out and the PSD extracted directly from the signal radiated from a radar sensor operating in the <inline-formula><tex-math notation="LaTeX">$76 \,\mathrm{G}\mathrm{Hz}$</tex-math></inline-formula>–<inline-formula><tex-math notation="LaTeX">$81 \,\mathrm{G}\mathrm{Hz}$</tex-math></inline-formula> automotive frequency band. For this, the radar signal is demodulated in the analog domain by mixing it with a delayed version of the received signal. Demodulation compresses the signal bandwidth, simplifying hardware requirements for sampling and signal processing. The remaining systematic errors are compensated and the range correlation effect is corrected by an appropriate signal processing scheme. Our approach eliminates the need for prior knowledge of modulation parameters, leading to both increased precision and reduced potential for errors. The proposed setup is validated comparing system measurements with data obtained from established testing methods and simulations.The presented setup successfully demonstrates the capability of performing OTA test measurements of a PSD from a FMCW sensor. Our results demonstrate good agreement between the PSD test results and the expected outcome.https://ieeexplore.ieee.org/document/10714376/FMCWchirp sequencephase noiseradarradar sensorphase noise measurement |
| spellingShingle | Christoph Birkenhauer Peter Tschapek Martin Vossiek Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors IEEE Journal of Microwaves FMCW chirp sequence phase noise radar radar sensor phase noise measurement |
| title | Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors |
| title_full | Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors |
| title_fullStr | Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors |
| title_full_unstemmed | Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors |
| title_short | Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors |
| title_sort | over the air phase noise spectral density measurement for fmcw radar sensors |
| topic | FMCW chirp sequence phase noise radar radar sensor phase noise measurement |
| url | https://ieeexplore.ieee.org/document/10714376/ |
| work_keys_str_mv | AT christophbirkenhauer overtheairphasenoisespectraldensitymeasurementforfmcwradarsensors AT petertschapek overtheairphasenoisespectraldensitymeasurementforfmcwradarsensors AT martinvossiek overtheairphasenoisespectraldensitymeasurementforfmcwradarsensors |