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

An interference cancellation, non-cooperative technology, applied in the field of satellite communication anti-interference, can solve the problems of non-cooperative interference that cannot be used to suppress enemy interference equipment, interference cancellation of broadband signal frequency division points, and limited cancellation performance. Achieve the effect of improving the receiving signal-to-noise ratio index, high interference cancellation performance, and high cancellation performance

Active Publication Date: 2022-02-22
NAVAL UNIV OF ENG PLA
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  • Description
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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.

Method used

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

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Embodiment 1

[0062] see figure 2 As shown, Embodiment 1 of the present invention provides a non-cooperative interference cancellation method for partial frequency band protection, and performs interference cancellation control based on the above-mentioned non-cooperative interference cancellation device for partial frequency band protection, including the following steps:

[0063] S1, the error signal and the received signals of the N auxiliary antennas are respectively passed through a band-pass filter to obtain the error signal and the received signals of the auxiliary antennas that need to be canceled; the band-pass filter is a multi-subband filter.

[0064] S2, the output signals of the second to N+1th bandpass filters pass through a space-time filter to obtain interference cancellation signals; the bandpass filters are multi-subband filters.

[0065] S3, the cancellation signal passes through a phase shifter to obtain the phase-shifted cancellation signal, wherein the value of the ph...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04B15/00
CPCH04B15/00H04B7/185
Inventor 王青孟进何方敏李斌罗康杨凯刘宏波张雲硕
Owner NAVAL UNIV OF ENG PLA
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