Design and Implementation of Adaptive Anti-jamming Line Frequency Communication Filter Based on RLS Algorithm

Objective: The useful distortion signals in the power grid are relatively small compared to voltage or current signals, which will annihilate the useful distortion signals during transmission, in order to suppress the noise interference in the power grid, adaptive filters for IF communication are designed. Methods: Bidirectional IF communication technology is employed to transmit signals, utilizing the core technology of an adaptive filter algorithm based on Reconfigurable Intelligent Surfaces (RIS) with adjustable parameters. Results: When the modulated signal is processed by the adaptive anti-jamming RIS algorithm of the filter, it significantly reduces interference noise and improves the signal-to-noise ratio without prior knowledge of the input signal and noise’s statistical characteristics. This enhances the channel’s signal energy and effectively improves the transmission of bidirectional IF communication signals. Conclusion: Through experimental simulation, the design of adaptive filter based on RIS algorithm realizes the effective transmission of signals, while the noise of bidirectional IF communication signals is effectively suppressed.