A.I. Perov1

1 National Research University «MPEI» (Moscow, Russia)

1 alexp@aha.ru

Navigation apparatus of Global Positioning Systems are wildly used in many applications. One of the important characteristic of such apparatus is an interference immunity that is depend on a type of radiosignal modulation. Usually a task of interference immunity is considered on analysis signal parameters that are defined frequency band. But it is known the bigger defined frequency - the higher interference immunity and there are now an answer to the problem haw interference immunity is depended on signal modulation type when signal bandwidth is fixed. In the article there are analysed an interference immunity of navigation radiosignals with various modulations when signal bandwidth is fixed.

Objective. To take comparative analysis of interference immunity of radiosignals with various modulations but having equal signal bandwidth.

In the article there are analysed an interference immunity of navigation radiosignals with various modulations when signal bandwidth is fixed. There are describe signal description with phase and frequency manipulations, binary offset carrier modulation, minimum shift key modulation, frequency hopping modulations, step-shape code symbol modulation. There are given correlation functions for these modulations. As a quality performance there are chosen signal-to-jammer ratio at a complex correlator output. An influence of bandwidth noise and similar-to-signal jammer are examine. There are shown that better interference immunity are reached when и if similar-to-signal jammer are acted and, if bandwidth noise jammer are acted. What's more interference immunity is better for bandwidth noise jammer compared with similar-to-signal jammer.

Perov A.I. Сomparative analysis of interference immunity of navigation radiosignals with various modulations // Radioengineering. 2026. V. 90. № 9. P. 31−40. DOI: https://doi.org/10.18127/j00338486-202609-03

1. GLONASS. Modernizaciya i perspektivy razvitiya. Pod red. A.I. Perova. M.: Radiotekhnika. 2020. 1072 s. (in Russian).
2. Cote F.D., Psaromiligkos I.N., Gross W.J. GNSS modulation: a unified statistical description. IEEE Trans. Aerosp. Electron. Syst. 2011. V. 47. № 3. Р. 1814—1836.
3. Axel Javier Garcia Pena, Philippe Paimblanc, Daniel Salos, Olivier Julien, Marie-Laure Boucheret, Thomas Grelier, Lionel Ries. Investigation of CSK as a Candidate for Future GNSS Signals. HAL Id: hal-00944397. https: //hal-enac.archives-ouvertes.fr/hal-00944397,2014.
4. Jiangang Ma, Yikang Yang, Hengnian Li, Jisheng Li. FH-BOC: generalized low-ambiguity anti-interference spread spectrum modulation based on frequency-hopping binary offset carrier. GPS Solutions. 2020.
5. Zheng Yao, Mingquan Lu. Next-Generation GNSS Signal Design. Theories, Principles and Technologies. Springer. 2021.
6. Ipatov V.P. Shirokopolosnye sistemy i kodovoe razdelenie signalov. Principy i prilozheniya. M.: Tekhnosfera. 2007. 487 s. (in Russian).