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

An interference cancellation and non-cooperative technology, which is applied in transmission noise suppression, radio transmission systems, electrical components, etc. The problems such as limited cancellation performance can be achieved, and the effect of improving the receiving signal-to-noise ratio index, high interference cancellation performance, and high cancellation performance can be achieved

Active Publication Date: 2022-01-11
NAVAL UNIV OF ENG PLA
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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 a phase-shifted cancellation signal, wherein the value of the phas...

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Abstract

The invention provides a non-cooperative interference cancellation device and method for partial frequency band protection. The device comprises 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, N is greater than or equal to 1, interference cancellation processing is carried out in an analog domain, and adaptive beam forming is carried out in a digital domain, and anti-interference processing of partial frequency points in a wide working frequency band is realized. The method provided by the invention can be used for interference protection of part of narrowband frequency points in a wide working band without influencing other signal frequency points which are not interfered, can avoid the problem of high-speed sampling of broadband signals, reduces the requirement on the sampling rate of a digital-to-analog converter, and greatly improves the receiving signal-to-noise ratio index; and beam forming signal processing can be realized in a digital domain under the conditions of a complex multi-path environment and a large number of antennas, so that 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 Applications(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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