Method and device for suppressing narrowband interference
A narrow-band interference and interference suppression technology, which is applied in the field of anti-interference, can solve the problems of general narrow-band anti-interference effect, many hardware implementation resources, and inability to maintain signal phase information, etc., to achieve good results and avoid excessive errors.
Active Publication Date: 2020-08-04
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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[0005] However, these methods have the technical defects of general narrowband anti-jamming effect, inability to maintain the phase information of the signal, and more hardware implementation resources.
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[0040] The narrowband anti-jamming effect based on the existing technology is general, the phase information of the signal cannot be maintained and the technical defects of hardware implementation resources are many. To reduce hardware implementation resources, the invention provides a method and device for suppressing narrowband interference.
[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0042] An aspect of the embodiments of the present invention provides a method for suppressing narrowband interference, figure 1 It is a schematic diagram of the steps of the method for suppressing narrowband interference according to the embodiment of the present invention, such as figure 1 As shown, the method includes the steps of:
[0043]S1. Perform delay processing on the ...
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The invention discloses a method and device for suppressing narrowband interference. The method comprises the following steps: performing delay processing on an intermediate frequency signal to obtaina path of undelayed initial signal and at least one path of delay signal; respectively performing interference suppression processing on the initial signal and the delay signal, and attenuating an interference spectral line therein to determine a first processing signal and a second processing signal, wherein the initial signal and the delay signal are time domain signals, the first processing signal and the second processing signal are frequency domain signals; converting the first processing signal and the second processing signal into a first time domain signal and a second time domain signal, and overlapping the first time domain signal and the second time domain signal to determine an output signal; or selecting signals of M / 4 sampling points before and behinds the M / 2 sampling points of the first processing signal and the second processing signal to determine an output signal. Through the method disclosed by the invention, the good narrowband anti-interference effect can be achieved, the phase information of the signal can be maintained, and the hardware realization resource is reduced.
Description
technical field [0001] The invention relates to the field of anti-interference technology, in particular to a method and device for suppressing narrow-band interference in communication technology. Background technique [0002] The communication technology based on direct sequence spread spectrum can transmit in low power and low signal-to-noise ratio environment, and can filter out interference and noise, improve signal-to-noise ratio, and has a certain strength of anti-interception ability and anti-interference ability, and is widely used in In the satellite navigation and positioning system, when receiving strong narrow-band interference, the navigation reception performance will drop sharply. [0003] The main idea of the commonly used transform domain narrowband anti-interference technology is that the effective signal and the narrowband interference signal have different bandwidth and power distribution characteristics in the transform domain. This characteristic can...
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IPC IPC(8): H04B1/10G01S19/21
CPCG01S19/21H04B1/1036
Inventor 罗伟杰李金海孙金海欧松林王新玲范理
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI