Radar Frequency-Comparison Monopulse Validation Using FPGA-Generated Wideband Chirp Waveforms

In this paper, we introduce a frequency-based Direction of Arrival (DoA) estimation technique for wideband radar systems employing Linear Frequency Modulated (LFM) signals. Conventional phase-comparison monopulse is subject to estimation ambiguities, especially in the case of a large baseline distan...

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Bibliographic Details
Published inProceedings International Radar Symposium pp. 1 - 6
Main Authors Quirini, Andrea, Baloch, Aisha, Arshad, Fabia, Bongioanni, Carlo, Colone, Fabiola, Lombardo, Pierfrancesco
Format Conference Proceeding
LanguageEnglish
Published German Institute of Navigation - DGON 21.05.2025
Subjects
Chirp modulation
Direction-of-arrival estimation
Estimation
Field programmable gate arrays
Frequency estimation
Frequency modulation
Radar
Radar antennas
Time-frequency analysis
Wideband
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Summary:In this paper, we introduce a frequency-based Direction of Arrival (DoA) estimation technique for wideband radar systems employing Linear Frequency Modulated (LFM) signals. Conventional phase-comparison monopulse is subject to estimation ambiguities, especially in the case of a large baseline distance. In contrast, the proposed frequency-comparison monopulse leverages the time-to-frequency mapping property of LFM signals, enabling unambiguous DoA estimation for any antenna spacing. By leveraging a fully digital generation method for LFM signals implemented on the ZCU111 FPGA platform, we carry out a validation test of the frequency-comparison monopulse, demonstrating its effectiveness in addressing the limitations of conventional monopulse.
ISSN:2155-5753
DOI:10.23919/IRS64527.2025.11046109