Non-cooperative interference cancellation device and method for partial frequency band protection

Abstract

The invention provides a non-cooperative interference cancellation device and method for partial frequency band protection. The device includes a microwave delay line, a synthesizer, a coupler, N auxiliary antennas, N+1 down-converters, N+1 analog-to-digital converters, a digital signal processing unit, a digital-to-analog converter, and an up-converter, Where N is greater than or equal to 1, by performing interference cancellation processing in the analog domain and adaptive beamforming in the digital domain, the anti-interference processing of some frequency points in the wide operating frequency band is realized. The method provided by the invention can be used for the interference protection of some narrowband frequency points in the wide working frequency band without affecting other undisturbed signal frequency points, which can avoid the problem of high-speed sampling of broadband signals and reduce the sampling rate of digital-to-analog converters. Requirements, the receiving signal-to-noise ratio index is greatly improved; and the beamforming signal processing under the complex multipath environment and a large number of antennas can be realized in the digital domain, and the anti-interference performance is improved.

Description

technical field [0001] The invention relates to the technical field of satellite communication anti-interference, in particular to a non-cooperative interference cancellation device and method for partial frequency band protection. Background technique [0002] Satellite communication is one of the important means of communication for the army, and it is generally used for combat commands, situational data transmission and other purposes. Ensuring the smooth flow of satellite communication links plays a key role in the success or failure of operations. However, in actual combat, the enemy may use electronic warfare weapons to interfere with the Satcom ground station, thereby blocking the downlink receiving link. Therefore, it is of great military significance to protect the satellite communication ground station from interference and improve the anti-jamming communication capability in the electromagnetic interference environment. [0003] Adaptive beamforming technology b...

AI Technical Summary

Problems solved by technology

However, this device is only suitable for solving the transmission and reception interference between co-platform devices, and cannot be used to suppress non-cooperative interference released by enemy jamming devices

Moreover, the device adopts the aforementioned digital-analog hybrid cancellation principle, which has problems such as high cost and limited cancellation performance.

Therefore, none of the current methods can well solve the interference cancellation problem of some frequency points in broadband signals.

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