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Journal of Radio Electronics Online scientific journal · eISSN 1684-1719
2026, № 9 · RADIO ELECTRONICS RELATED PROBLEMS

Adaptive selection of the sounding direction in acoustic systems based on super-resolution direction finding of interference sources. Part 2

N.P. Krasnenko1, I.A. Rybakov1

1 Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch RAS, Tomsk, Russia
PDF DOI: 10.30898/1684-1719.2026.9.5 UDC 534.6.08 Published 9 November 2026

Abstract

This study investigates the resolution performance of the Capon and MUSIC super-resolution direction-of-arrival (DOA) estimation methods for localizing broadband acoustic interference in atmospheric monitoring systems. The relevance of this research is driven by the need to improve the interference immunity of sodar systems operating in environments characterized by intense anthropogenic and natural acoustic noise. The study analyzes the dependence of the principal DOA estimation performance metrics–the depth of the valley between adjacent peaks in the spatial spectrum and the minimum resolvable angular separation–on the interference-to-internal-noise ratio, the observation interval, and the number of antenna array elements. Numerical simulations were performed using real-world recordings of acoustic interference. The resulting quantitative relationships provide a sound basis for selecting both the system parameters and the DOA estimation algorithm according to the prevailing interference environment. This paper is a continuation of Part I, in which a general framework for the adaptive selection of the sounding direction based on interference source localization was proposed.

  • sodar
  • adaptive antenna array
  • angular coordinates
  • interference
  • direction finding
Аннотация (на русском)

Адаптивный выбор направления зондирования в акустических системах на основе сверхразрешающей пеленгации источников помех. Часть 2

Работа посвящена исследованию разрешающей способности методов сверхразрешающей пеленгации (Кейпона и MUSIC) применительно к задаче локализации широкополосных акустических помех в системах атмосферного мониторинга. Актуальность работы обусловлена необходимостью повышения помехозащищенности содаров, функционирующих в условиях интенсивного техногенного и природного шума. Проведен анализ зависимости основных показателей качества пеленгования – глубины провала между пиками пространственного спектра и минимального разрешаемого углового расстояния – от отношения помеха/внутренний шум, длительности входной реализации и количества элементов антенной решетки. Моделирование выполнялось с использованием реальных записей акустических помех. Полученные количественные зависимости позволяют обоснованно выбирать параметры системы и алгоритм пеленгации в зависимости от конкретной помеховой обстановки. Работа является продолжением первой части, в которой был предложен общий подход к адаптивному выбору направления зондирования на основе пеленгации источников помех.

Funding

This work was carried out within the framework of the state assignment of the Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch of the Russian Academy of Sciences (IMCES SB RAS), and with financial support from the Ministry of Science and Higher Education of the Russian Federation under Project No. FEWM-2023-0014 (TUSUR).

For citation

Krasnenko N.P., Rybakov I.A. Adaptive selection of the sounding direction in acoustic systems based on super-resolution direction finding of interference sources. Part 2 // Journal of Radio Electronics. – 2026. – No. 9. https://doi.org/10.30898/1684-1719.2026.9.5

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