Guiding type digital anti-interception and anti-interference device and method

Abstract

The invention discloses a guiding type digital anti-interception and anti-interference device and method. The guiding type digital anti-interception and anti-interference device comprises an orthogonal receiving module, a space domain cancellation module, a spreading code synchronization module, a time domain cancellation module, a reference signal extraction module and an orthogonal transmitting module. The method comprises the following steps of extracting a guide signal as a reference signal at a receiving end, periodically updating an airspace merging weight by utilizing a matrix inversion method, and performing accurate nulling on interference on a directional diagram of a receiving antenna of a communication radio station under the condition of not knowing interference and signal directions so as to suppress various external strong interferences, using a time domain cancellation technology, using an output signal of the reference extraction module as a reference signal, further suppressing residual external strong interference and a spreading code signal introduced by a transmitting end, and recovering a useful signal and sending to a receiver; two-stage interference cancellation is completed, the insertion loss is small, the dynamic range is large, the cancellation speed is high, the interference suppression algorithm generalization performance is high, two-stage reference cancellation also ensures the communication quality, and the signal processing real-time performance is good.

Description

technical field [0001] The invention belongs to the technical field of communication anti-interference, and in particular relates to a guided digital anti-interception and anti-interference device and method. Background technique [0002] Interference and anti-jamming technology are mutually reinforcing and mutually restraining, and they continue to develop. The research, development and application of communication anti-jamming technology have attracted more and more attention. However, communication stations are often faced with harsh operating environments and are susceptible to various intentional or unintentional interferences, especially strong interferences facing countermeasures, so they cannot work normally. The weight-merging interference cancellation technology is an important technical means to solve the problem of radio frequency interference. The principle is to adjust the gain of multi-antenna received signals and combine them to complete the elimination of i...

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Problems solved by technology

[0004] A Chinese patent for a multi-channel interference cancellation device (application number 201518001239.6), an adaptive interference cancellation device and its debugging method (application number 201110223502.7) all belong to the analog domain interference cancellation scheme, and the Chinese patent digital-analog hybrid automatic Adaptive interference cancellation device (application number 201811155137.9) and other hybrid interference cancellation schemes belonging to the analog domain and digital domain cannot overcome the problems of analog domain cancellation such as implementation complexity, insertion loss, adaptive adjustment and cancellation speed, Chinese patent digital The radio frequency cancellation device and method for domain interference reconstruction (patent number 201811155774.6) belongs to the digital domain interference cancellation scheme, but there is a delay in processing signals and the real-time performance is poor

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