Spectrum analysis of signal triads for Doppler shift frequency determination in multi-target tracking mode

Gennady A. Morozov; Oleg G. Morozov; Alexandra A. Lustina; Andrey V. Maltsev; Ayrat Zh. Sakhabutdinov; Ilnur I. Nureev

doi:10.1117/12.2633170

25 July 2022 Spectrum analysis of signal triads for Doppler shift frequency determination in multi-target tracking mode

Gennady A. Morozov, Oleg G. Morozov, Alexandra A. Lustina, Andrey V. Maltsev, Ayrat Zh. Sakhabutdinov, Ilnur I. Nureev

Proceedings Volume 12295, Optical Technologies for Telecommunications 2021; 122950K (2022) https://doi.org/10.1117/12.2633170
Event: Nineteenth International Scientific and Technical Conference "Optical Technologies for Communications", 2021, Samara, Russian Federation

Abstract

The article considers typical problems of determining the Doppler frequency shift (DFS) and its sign in continuous-wave or pulse radars using microwave photonic technologies in multi-target tracking mode. The structure of the hardware-software spectrum analyzer and variants of its software for solving the above problems are proposed. The analyzer is functionally universal, however, its main purpose is to solve the problems of determining the magnitude and sign of the DFS when using a microwave photonic device based on tandem single-port amplitude and phase modulators in the radar receiver. For multi-target tracking, software of receiver is supplemented by an FFT with further analysis of all received components by scanning with an ultra-narrow band filter. The absolute error in determining the DFS from the frequency of information signals depends on the bandwidth of the software ultra-narrow band filter (units of Hz). The relative error in determining the amplitudes of information signals does not exceed ~10^–3 in almost the entire range of amplitudes of the hardware high quality linear filter at the output of receiver. The ratio D of the obtained amplitudes for a pair of associated DFS information frequencies for one specific target allows you to determine its sign: if D < 1, the target is removed, if D >1 , the target is approaching. Using a method similar to the method for multi-target tracking of a continuous wave radar, typical problems of determining the DFS and its sign in pulse radars can be solved.

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Gennady A. Morozov, Oleg G. Morozov, Alexandra A. Lustina, Andrey V. Maltsev, Ayrat Zh. Sakhabutdinov, and Ilnur I. Nureev "Spectrum analysis of signal triads for Doppler shift frequency determination in multi-target tracking mode", Proc. SPIE 12295, Optical Technologies for Telecommunications 2021, 122950K (25 July 2022); https://doi.org/10.1117/12.2633170

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KEYWORDS

Radar

Microwave photonics

Doppler effect

Receivers

Electronic filtering

Linear filtering

Spectrum analysis

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