L-band high-speed frequency hopping data link non-cooperative interference cancellation device and method

Abstract

The invention provides an L-band high-speed frequency hopping data link non-cooperative interference cancellation device and method, belonging to the technical field of wireless communication equipment anti-interference. The device includes: an interference sampling antenna array samples space signals; The signal is subjected to notch filtering, amplitude limiting and amplification; the L-band receiving frequency conversion module is used for signal gain adjustment, pre-selection filtering and down-conversion, intermediate frequency filtering and linear amplification for the amplified sampling signal and main control signal to obtain intermediate frequency signal; digital signal The processing module is used to sequentially perform digital channelization, broadband interference perception judgment method judgment, non-cooperative broadband interference cancellation and broadband signal splicing on the intermediate frequency signal to form a broadband digital signal; the RF signal reconstruction module is used to convert the broadband digital signal to digital-to-analog. to the RF and output the playback signal. The invention can eliminate the high-power broadband interference faced by the L-band high-speed frequency hopping data link and ensure smooth communication.

Description

technical field [0001] The invention belongs to the technical field of anti-interference of wireless communication equipment, and more particularly, relates to a non-cooperative interference cancellation device and method for an L-band high-speed frequency hopping data link. Background technique [0002] The main purpose of anti-jamming communication is to counter the malicious electronic interference of the opponent and protect the communication link of one's own side to effectively transmit information. It is one of the key technologies of military wireless communication. The two characteristics of high hopping speed and wide frequency band make it have strong anti-interference ability. Even so, due to the importance of its transmission of information, it often becomes a high-value interference target for electronic countermeasures; on the other hand, with the space power With the development of synthesis technology and the continuous improvement of the performance of powe...

AI Technical Summary

Problems solved by technology

Analyzing the existing public anti-jamming methods in outer space, one technical route is to use the angle-of-arrival direction information of the signal and use angle-constrained adaptive beamforming, but it is extremely difficult to accurately estimate the direction of the signal angle of arrival in a complex electromagnetic environment. Especially under multi-path channel conditions; another technical route is to combine the design of communication signal waveforms to generate corresponding reference signals locally to achieve interference cancellation, but redesigning communication signal waveforms requires comprehensive changes to communication equipment, which is tantamount to designing new communication equipment, there are compatibility and adaptation problems with existing communication equipment

[0004] Patent document CN201811155735.6 discloses "RF Adaptive Interference Cancellation Device and Its Debugging Method" and patent document CN201320001505.0 discloses "Adaptive Broadband Interference Cancellation Device", both of which belong to the co-site interference cancellation scheme of local reference signals. Unable to solve the problem of non-cooperative interference signal cancellation under the condition of no local reference signal; multi-point interference cancellation device and method for Ku and Ka dual-band satellite communication ground stations (authorized announcement number CN113922889B) and microwave same-frequency interference protection device ( Application number CN201811155746.4) belongs to the non-cooperative interference cancellation scheme under the condition that the communication signal angle of arrival direction is clear, and cannot solve the non-cooperative interference cancellation problem of the omnidirectional transceiver antenna communication system; ultrashort wave radio interference protection device (authorized announcement No. CN113438035B), unable to solve the problem of high jump speed and wide frequency band

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