Narrowband interference resisting system and method based on adaptive signal processing

Abstract

The invention discloses a narrowband interference resisting system and a narrowband interference resisting method based on adaptive signal processing. The narrowband interference resisting system based on the adaptive signal processing is located at the front end of a digital baseband, performs filtering processing on a digital intermediate frequency signal received by the narrowband interference resisting system based on the adaptive signal processing, and outputs the signal to the digital baseband after interference of the signal is filtered out. The narrowband interference resisting system based on the adaptive signal processing comprises a power spectrum estimation module of an interference signal, an interference reference signal generation module and an adaptive signal processing module. The narrowband interference resisting method based on the adaptive signal processing is directed at narrowband noise and continuous wave interference, and used to accurately detect, track and filter the interference signal. According to the narrowband interference resisting system and the narrowband interference resisting method based on the adaptive signal processing, useful signal components are retained to the utmost on the premise of filtering out the interference signal.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation signal processing, and in particular relates to an anti-narrow-band interference system and method based on adaptive signal processing. Background technique [0002] The receiving power of GNSS satellite signals after reaching the ground through long-distance space propagation is already very weak, coupled with the complex electromagnetic environment near the ground, GNSS receivers are easily affected by in-band interference, and the interference signals will block the receiver's reception of satellite signals with demodulation. For interference signals with an interference-to-signal ratio of less than 15dB and GNSS signals with a bandwidth of 2MHz, the receiver signal processing can effectively suppress interference after despreading, but for interference signals with strong power, the performance of the GNSS receiver will degrade, or even fail. Acquire and track GNSS satellite sign...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects in the prior art, the present invention provides an anti-narrow-band interference system and method based on adaptive signal processing, which filters out the narrow-band interference components in the received digital intermediate frequency signal, so as to solve the problems caused by interference in the receiver Slow performance or even non-working issues

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