Two-Step Algorithm for Detection and Rejection of Multi-Frequency Interference in Navigation Receivers
Abstract
Purpose: The research in increasing the noise immunity of navigation receivers in vehicles and telematics systems does not fully use the modern possibilities of digital signal processing. This is particularly evident when navigation receivers operate in a noisy environment. Therefore, there is a need for the development and implementation of new algorithms for processing the navigation signals using digital signal processing capabilities at various stages of signal conversion in the user's navigational equipment, including the pre-correlation stage. Results: A two-step algorithm is proposed for the detection and rejection of multi-frequency interference in GLONASS navigational equipment through the use of pre-correlation digital signal processing. The first stage includes the noise condition control, the construction of a frequency panorama for the interference, and autonomous determination of the parameters of multi-frequency interference harmonics. At the second stage, the detected components of the multi-frequency interference in the time domain are rejected through the use of a bank of digital filter coefficients. Practical relevance: The obtained results and the limitations formulated for the level and width of the rejected interference spectrum can be used for developing and substantiating the requirements for advanced models of noise-resistant navigation receivers. The results of analyzing the distortions of autocorrelation functions of GLONASS navigation system with FDMA or CDMA and rejected multi-frequency interference determine the total band of the interference rejection when using the proposed algorithm.Published
2017-04-21
How to Cite
Koshkarov, A., & Dobrikov, V. (2017). Two-Step Algorithm for Detection and Rejection of Multi-Frequency Interference in Navigation Receivers. Information and Control Systems, (2), 88-95. https://doi.org/10.15217/issn1684-8853.2017.2.88
Issue
Section
Information channels and medium