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Method and equipment for suppressing interference

A technology for suppressing interference and suppressing interference, which is applied in the direction of digital transmission system, electrical components, and error prevention, etc. It can solve the problems that the sudden change of signal parameters cannot be considered, it cannot be realized, and the interference cannot be effectively suppressed.

Active Publication Date: 2014-04-16
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned first method, it is necessary to know the characteristics of the suppressed interference signal in advance, so as to generate a signal related to it to achieve interference cancellation, so it cannot be realized without knowing its characteristics
[0011] In the above-mentioned second method, it is only applicable to the suppressed interference of the narrowband type, and the suppressed interference of the broadband type cannot be well suppressed
[0012] For deceptive interference: it does not take into account that the parameters of the signal will change suddenly in different occasions and emergencies, so that the interference cannot be effectively suppressed

Method used

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  • Method and equipment for suppressing interference
  • Method and equipment for suppressing interference

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Embodiment 1

[0081] like figure 1 As shown, the embodiment of the present invention provides a method for suppressing interference, including:

[0082] Step 101: Adjust the filtering threshold and signal threshold according to the location of the receiving end, the external environment and signal propagation error factors;

[0083] Among them, the location of the receiving end includes at least latitude and longitude and altitude, the external environment where the receiving end is located includes at least air humidity and surrounding obstacles, signal propagation error factors include at least ionospheric and tropospheric refraction, and the signal threshold that needs to be adjusted includes at least power range, Arrival Time Range, Arrival Angle Range, or Navigation Parameter Range.

[0084] Step 102: Determine the type of suppressed interference in the received signal, if the suppressed interference in the signal is narrowband type, then perform step 103: if the suppressed interferen...

Embodiment 2

[0091] like figure 2 As shown, the embodiment of the present invention provides a method for suppressing interference, including:

[0092] Step 201: According to the location of the receiving end and the external environment, as well as signal propagation error factors, adjust the signal threshold and filtering threshold stored in the knowledge base in the receiving end, wherein the signal threshold to be adjusted includes the power range and arrival time range , Arrival angle range or navigation parameter range;

[0093] Wherein, the location of the receiving end includes at least latitude and longitude and altitude, the external environment where the receiving end is located includes at least surrounding obstacles and / or air humidity of the receiving end, and signal propagation error factors include at least ionospheric and tropospheric refraction.

[0094] Wherein, the sensor of the receiving end monitors the position of the receiving end, the external environment and the...

Embodiment 3

[0138] like image 3 As shown, the embodiment of the present invention provides a device for suppressing interference, including:

[0139] An adjustment module 301, configured to adjust the filtering threshold and the signal threshold according to the location of the receiving end, the external environment and signal propagation error factors;

[0140] The first removal module 302 is configured to intercept the signal by using a window function when the suppressive interference in the signal is of a narrowband type, and remove the suppressive interference whose spectrum exceeds the filtering threshold from the intercepted signal;

[0141] The second removal module 303 is configured to obtain an interference cancellation signal when the suppression interference in the signal is of a broadband type, and remove the suppression interference from the signal by using the interference cancellation signal;

[0142] The determination module 304 is configured to determine whether the s...

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Abstract

The invention discloses a method and equipment for suppressing interference and belongs to the field of wireless communication. The method comprises the following steps of: adjusting a filtering threshold and a signal threshold value according to a position of a receiving end, an external environment and a signal propagation error factor; when suppressing interference in the signal has a narrow-band type, intercepting the signal through a window function, and removing the suppressing interference of which the frequency spectrum exceeds the filtering threshold from the intercepted signal; when suppressing interference in the signal has a wideband type, acquiring an interference cancelling signal, and removing the suppressing interference from the signal by utilizing the interference cancelling signal; and determining whether the signal is deception interference according to the signal threshold value, if so, discarding the signal, otherwise, determining that the signal is a normal signal. The interference can be suppressed under the condition that interference characteristics are not known in advance, and the wideband interference can be suppressed, and the deception interference is effectively suppressed.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and equipment for suppressing interference. Background technique [0002] The global satellite navigation system is an important information base and strategic facility for all countries, and has been widely used in key fields such as national defense. In military applications and some civilian fields, high requirements are put forward for the integrity and continuity of satellite navigation. However, due to the extremely weak power of the navigation satellite signal reaching the ground, the satellite navigation receiving end is easily interfered; especially the man-made suppressive interference and deceptive interference have brought huge hidden dangers to the application. [0003] For suppressive interference, there are currently several suppression methods, including: [0004] The first method: a signal related to the suppressed interference signal is generated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 邓中亮刘华东杨磊余彦培黄建明韩可徐连明牛凯
Owner BEIJING UNIV OF POSTS & TELECOMM
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