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Джиган, В. И. (Автор МИЭТ; Djigan, V. I.). Выбор адаптивного алгоритма для цифровой антенной решетки наземной аппаратуры систем глобальной спутниковой навигации / В. И. Джиган. - Текст : непосредственный : электронный // ЦИФРОВАЯ ОБРАБОТКА СИГНАЛОВ. - Москва : РНТОРЭС им. А. С. Попова, 2025. - № 2. - С. 27-35. - URL: https://elibrary.ru/item.asp?id=82610526 (дата обращения: 22.07.2025). - URL: http://www.dspa.ru/abstracts/ab-225.php#an225_5 (дата обращения: 22.07.2025).
Авторы:	Джиган, В. И.
Ключевые слова:	Адаптивные антенные решетки, Глобальные навигационные спутниковые системы, Компенсаторы боковых лепестков, Линейное ограничение, Отношение сигнал/шум, Рекурсивный алгоритм по критерию наименьших квадратов, Adaptive antenna array, Global navigation satellite systems, Side lobe canceller, Liner constraint, Signal-to-noise ratio, Recursive least squares
Аннотация:	This paper considers a technique for assessing the possibility of the receiving signals from the Global Navigation Satellite Systems (GNSS) using the Adaptive Antenna Arrays (AAA) as the antennas in the ground-based equipment. This technique is based on assessing the Signal-to-Noise Ratio (SNR) at the AAA output in its steady state. The SNR is assessed with a uniform discrete step over the entire set of the angles of the possible positions of the informational signal source (satellite) around the AAA. Based on these assessments, a map is formed showing the areas in the directions of which the reception of the satellite signals is possible or impossible. The simulation has demonstrated, that such reception is possible in the directions where, according to international standards, the SNR value of at least -20 dB is ensured at the output of the antenna or the AAA in use. The technique is demonstrated using the examples of two the AAA widely used in the ground-based equipment for the modern GNSS: a Side Lobe Canceller and an AAA with a Linear Constraint of the radiation pattern. The simulation has demonstrated that when using a rectangular equidistant AAA with eight wide-beam antennas, after the suppressing of the signals from 7 interference sources, the satellite signals can be received from approximately 30 % of the directions of the surrounding space (in the vicinity of the zenith). This value is approximately 10 % greater than that of the AAA before the adaptation. If such estimates are made only for the upper hemisphere of space, these values are doubled. In the experiment, both considered the AAA demonstrate approximately the same efficiency in terms of interference suppression and reception of information signals, although their radiation patterns in the steady state differ somewhat. For the AAA of other configurations and when operating in other interference environments, these estimates may differ and have different numerical values. Using the proposed technique, these estimates can be easily obtained for the desired operating conditions of the receiving AAA. The paper also presents the architectures and the computational procedures for calculation the weighs and the output signal of the considered AAA. These procedures are based on the use of the Recursive Least Squares algorithm for the adaptive filtering of the signals
Поиск:	Источник
Ссылка на ресурс:	https://elibrary.ru/item.asp?id=82610526
Ссылка на ресурс:	http://www.dspa.ru/abstracts/ab-225.php#an225_5