title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð²Ð·Ð°Ð¸Ð¼Ð½Ð¾Ð¹ ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð² Ð½Ð¸Ð·ÐºÐ¾Ð¾ÑÐ±Ð¸ÑÐ°Ð»ÑÐ½ÑÑ ÑÐ¿ÑÑÐ½Ð¸ÐºÐ¾Ð² Ð² ÑÐ°Ð·Ð½Ð¾ÑÑÐ½Ð¾-Ð´Ð°Ð»ÑÐ½Ð¾Ð¼ÐµÑÐ½Ð¾Ð¹ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ð¸ Ð¸ÑÑÐ¾ÑÐ½Ð¸ÐºÐ° ÑÐ°Ð´Ð¸Ð¾Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Investigation of the efficiency of the mutual correlation processing of signals from low-earth orbit satellites in different-range geolocation of a radio emission source
Creators: name: ÐÐ²Ð°Ð½Ð¾Ð², ÐÐ¸ÐºÐ¸ÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ñ
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ÑÐ°Ð·Ð¾Ð²Ð°Ñ Ð°Ð²ÑÐ¾Ð¿Ð¾Ð´ÑÑÑÐ¾Ð¹ÐºÐ° ÑÐ°ÑÑÐ¾ÑÑ
geolocation
low-earth orbit satellite
dynamic change of Doppler frequency shift
mutual correlation processing
phase-locked loop frequency control

description: Ð ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð° Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð° Ð½ÐµÐ²Ð¾Ð·Ð¼Ð¾Ð¶Ð½Ð¾ÑÑÑ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ð¸ Ð²ÑÐ»ÐµÐ´ÑÑÐ²Ð¸Ðµ Ð´Ð¸Ð½Ð°Ð¼Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð´Ð¾Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ ÑÐ´Ð²Ð¸Ð³Ð° ÑÐ°ÑÑÐ¾ÑÑ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð² Ð¾Ñ ÐÐ ÑÐ¿ÑÑÐ½Ð¸ÐºÐ° Ð¸ Ð½ÐµÐ¾Ð±ÑÐ¾Ð´Ð¸Ð¼Ð¾ÑÑÑ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð´Ð¾Ð¿Ð¾Ð»Ð½Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÑÐ°ÐºÐ¸Ñ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð² Ð´Ð»Ñ ÑÐµÑÐµÐ½Ð¸Ñ Ð·Ð°Ð´Ð°ÑÐ¸ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ð¸. Ð ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ» ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ Ð´Ð²ÑÑÑÑÐ°Ð¿Ð½ÑÐ¹ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼ ÐºÐ¾Ð¼Ð¿ÐµÐ½ÑÐ°ÑÐ¸Ð¸ Ð´Ð¾Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ ÑÐ´Ð²Ð¸Ð³Ð° ÑÐ°ÑÑÐ¾ÑÑ. ÐÐ° Ð¿ÐµÑÐ²Ð¾Ð¼ ÑÑÐ°Ð¿Ðµ Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸ÑÑÑ Ð³ÑÑÐ±Ð°Ñ Ð¾ÑÐµÐ½ÐºÐ° ÑÐ°ÑÑÐ¾ÑÑ Ð´Ð¾Ð¿Ð»ÐµÑÐ¾Ð²ÑÐºÐ¾Ð³Ð¾ ÑÐ´Ð²Ð¸Ð³Ð°, Ð½Ð° Ð²ÑÐ¾ÑÐ¾Ð¼ â Â«ÑÐ¾ÑÐ½Ð°ÑÂ» Ð¿Ð¾Ð´ÑÑÑÐ¾Ð¹ÐºÐ° ÑÐ°ÑÑÐ¾ÑÑ. Ð ÑÐ¾Ð´Ðµ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð° Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð° ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð½Ð¾Ð³Ð¾ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ð°. ÐÑÐ» Ð¿ÑÐ¸Ð²ÐµÐ´ÐµÐ½ Ð²Ð¸Ð´ Ð²Ð·Ð°Ð¸Ð¼Ð½Ð¾Ð¹ ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÑÐ½ÐºÑÐ¸Ð¸ (ÐÐÐ¤) Ð±ÐµÐ· Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ð° Ð¸ Ð¿Ð¾ÑÐ»Ðµ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð². Ð¢Ð°ÐºÐ¶Ðµ Ð±ÑÐ»Ð¾ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð½Ð¾Ð³Ð¾ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ð° Ð¿ÑÐ¸ ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸ÑÑ ÑÐ¸Ð³Ð½Ð°Ð»/ÑÑÐ¼ Ð´Ð»Ñ Ð´Ð²ÑÑ ÑÐ¸Ð¿Ð¾Ð² Ð¼Ð¾Ð´ÑÐ»ÑÑÐ¸Ð¹: BPSK Ð¸ QPSK. Ð ÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ°Ð±Ð¾ÑÑ Ð¼Ð¾Ð³ÑÑ Ð½Ð°Ð¹ÑÐ¸ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ðµ Ð² ÑÐ°Ð·Ð»Ð¸ÑÐ½ÑÑ ÑÐ¸ÑÑÐµÐ¼Ð°Ñ, Ð¸ÑÐ¿Ð¾Ð»ÑÐ·ÑÑÑÐ¸Ñ ÑÐ¸Ð³Ð½Ð°Ð»Ñ Ð¾Ñ ÐÐ ÑÐ¿ÑÑÐ½Ð¸ÐºÐ¾Ð². ÐÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ð½ÑÐ¹ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼ Ð¿Ð¾Ð·Ð²Ð¾Ð»ÑÐµÑ ÑÐ»ÑÑÑÐ¸ÑÑ ÑÐ¾ÑÐ½Ð¾ÑÑÑ Ð³ÐµÐ¾Ð»Ð¾ÐºÐ°ÑÐ¸Ð¸. ÐÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð»Ð¸ÑÑ Ð¾ÑÐºÑÑÑÑÐµ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÐµ ÑÐµÑÑÑÑÑ Ð¸ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ñ Ð¿Ð¾Ð¸ÑÐºÐ° Ð¸ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸. ÐÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð»Ð¸ÑÑ ÑÑÐµÐ´ÑÑÐ²Ð° Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸Ð·Ð°ÑÐ¸Ð¸ (Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ð¹) ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸: MATLAB. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð½ÑÐµ Ð°Ð»Ð³Ð¾ÑÐ¸ÑÐ¼Ñ Ð¿ÑÐ¾ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ñ Ð½Ð° Ð¼Ð¾Ð´ÐµÐ»Ð¸ Ð¸ Ð½Ð° Ð·Ð°Ð¿Ð¸ÑÑÑ ÑÐµÐ°Ð»ÑÐ½ÑÑ ÑÐ¸Ð³Ð½Ð°Ð»Ð¾Ð².
description: The object of study is a signal from low-earth orbit satellite. In the course of the work, the impossibility of geolocation was shown due to the dynamic Doppler shift of the frequency of signals from the satellite and the need for additional processing of such signals. In the course of the work, a two-stage algorithm for compensation of the Doppler frequency shift was developed. At the first stage, a rough estimate of the frequency of the Doppler shift is carried out, at the second â an "accurate" frequency adjustment. In the course of the work, the effectiveness of the developed algorithm was shown. The form of the mutual correlation function was given without using this algorithm and after signal processing with its help. There was also a study of the effectiveness of the developed algorithm at different signal-to-noise ratios for two types of modulations: BPSK and QPSK. The results of the work can be used in various systems that use signals from LEO satellites. The proposed algorithm makes it possible to improve the accuracy of geolocation. Open educational resources and information search and analysis programs were used. Automation (automated) development tools were used: MATLAB. The developed algorithms are tested on the model and on recordings of real signals.