A.N. Vereshchagin1, A.Yu. Taranenko2, A.A. Senchenko3

1 Siberian Federal University (Krasnoyarsk, Russia)
2,3 LLC NPO «YUST» (Krasnoyarsk, Russia)

1 AVereshagin@sfu-kras.ru, 2 epinewine@yandex.ru, 3 AlSenchenko@mail.ru

Existing commercial global navigation satellite system signal simulators do not fully meet the growing testing requirements for high-precision navigation equipment. Specifically, there is a shortage of affordable solutions that provide a high level of pseudorange accuracy, simulate complex dynamic scenarios, and handle multi-frequency signals from current and future systems (GLONASS, GPS, Galileo, BeiDou). This creates significant barriers to the development and independent verification of equipment used in critical applications such as geodesy, aerospace, and autonomous navigation.

The goal of this work is to develop a high-precision simulator for navigation satellite systems.

Traditional simulator implementations generate navigation signals at an intermediate frequency. A local oscillator and mixer are then used to convert the signals to the carrier frequency. The resulting signal at the carrier frequency must be filtered to remove combination components and spurious harmonics. The key element of the proposed design is a high-speed DAC with RF signal generation, which enables signal generation at the carrier frequency and eliminates the need for a low-pass filter, local oscillator, and combiner. Reducing the number of elements involved in signal generation will improve the accuracy of the navigation signal. Test results demonstrate the effectiveness of the developed design of the global navigation satellite system signal simulator, ensuring high-accuracy navigation signal generation. For example, the standard deviation of the code pseudorange generation error was approximately 1 mm, and the standard deviation of the phase generation error was 0,65 mm.

As part of the study, the architecture and hardware and software implementation of the high-precision INS-21 global navigation satellite system signal simulator were successfully developed. The developed simulator of signals from navigation satellite systems generates navigation signals with accuracy characteristics that exceed modern requirements for test equipment for debugging and checking receiving equipment.

The developed device can be used for calibration and accuracy assessment of navigation equipment, scientific research in radio navigation, development and debugging of high-precision positioning algorithms, and in educational settings for training GNSS specialists.

Vereshchagin A.N., Taranenko A.Yu., Senchenko A.A. Development of a high-precision simulator of global navigation satellite system signal. Achievements of modern radioelectronics. 2026. V. 80. № 2. P. 74–82. DOI: https://doi.org/10.18127/j20700784-202602-08
[in Russian]

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