Method and device of restraining narrow-band interference

A narrowband interference and frequency technology, applied in the field of communication, can solve the problems affecting the normal operation of the system, the influence of useful signals, and the limited effect of the filter, so as to improve the characteristics of components, ensure the performance consistency, and optimize the layout and wiring.

Inactive Publication Date: 2014-04-02
INNOFIDEI TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the interference falling within the operating frequency range of the system, if it is external interference, it is generally instantaneous or local interference, which will not cause serious interference to the normal operation of the system; however, for the narrowband interference of the system itself, due to the It will always exist, so it will seriously affect the normal operation of the system. In this case, the role of the filter is very limited, because while filtering out the interference, it will also affect the useful signal, resulting in a decline in system performance
[0004] In particular, for broadband wireless broadcasting or wireless communication systems, such as China Mobile Multimedia Broadcasting (CMMB), Long Term Evolution (LTE) systems, etc., the operating frequency range is relatively wide, such as CMMB The effective operating frequency of the system ranges from 460MHz to over 800MHz; when narrowband interference occurs in these systems, the existing technology can only try to suppress narrowband interference by improving the characteristics of components and optimizing layout and wiring, but these methods lead to damage to components The higher requirements will undoubtedly increase the cost of equipment, and it is difficult to guarantee the effect of use

Method used

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  • Method and device of restraining narrow-band interference
  • Method and device of restraining narrow-band interference
  • Method and device of restraining narrow-band interference

Examples

Experimental program
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Effect test

Embodiment 1

[0025] refer to figure 1 , which provides a flow chart of the narrowband interference suppression method provided in Embodiment 1 of the present application, which may specifically include:

[0026] Step 101. When there is narrowband interference in the system, detect the frequency corresponding to the narrowband interference;

[0027] Step 102. When the frequency corresponding to the above-mentioned narrow-band interference is the high-order harmonic frequency of the system clock, detect whether the above-mentioned high-order harmonic frequency of the system clock falls within the operating frequency range of the system;

[0028] Step 103. When the higher harmonic frequency of the system clock falls within the system operating frequency range, adjust the frequency of the system clock so that the higher harmonic frequency of the system clock falls outside the system operating frequency range.

[0029] The embodiments of the present application can be applied to various wirele...

Embodiment 2

[0052] The narrowband interference suppression method of this embodiment is described above figure 1 On the basis of the illustrated embodiments, the following optional technical solutions may be further included.

[0053] The above-mentioned step 102 of detecting whether the higher harmonic frequency of the system clock in this embodiment falls within the operating range of the system may specifically include:

[0054] When the absolute value of the difference between the higher harmonic frequency of the system clock and the system operating frequency range does not exceed a frequency threshold, it is determined that the higher harmonic frequency of the system clock falls within the system operating frequency range.

[0055] In a specific implementation, when the integer multiple of the frequency of the system clock is within the range of the operating frequency of the system, it can be determined that the higher harmonics of the system clock will interfere with the operation...

Embodiment 3

[0058] refer to figure 2 , an optional flow chart of the method for suppressing narrowband interference provided in Embodiment 3 of the present application is given. The narrowband interference suppression method of this embodiment is described above figure 1 On the basis of the illustrated embodiments, the following optional technical solutions may be further included.

[0059] like figure 2 As shown, the above step 103 of adjusting the frequency of the system clock may specifically include:

[0060] Sub-step 131, determine the decimal adjustment factor of the system clock according to the higher harmonic frequency of the system clock corresponding to the number of interference harmonics and the operating frequency range of the system;

[0061] Sub-step 132: Adjust the frequency of the system clock according to the fractional adjustment factor of the system clock.

[0062] Corresponding to the above-mentioned sampling clock, in an application example of this application...

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Abstract

The invention provides a method and a device of restraining narrow-band interference. The method specifically comprises the following steps of detecting a frequency which corresponds to the narrow-band interference when a system has the narrow-band interference; detecting whether a higher harmonic frequency of a system clock falls into the operating frequency range of the system when the frequency which corresponds to the narrow-band interference is the higher harmonic frequency of the system clock; when the higher harmonic frequency of the system clock falls into the operating frequency range of the system, adjusting the frequency of the system clock so as to cause the higher harmonic frequency of the system clock to fall out of the operating frequency range of the system. According to the method and the system, the influence of the narrow-band interference of the system on the system performance is solved, and the equipment cost is reduced.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for suppressing narrowband interference. Background technique [0002] Narrowband interference is a ubiquitous problem for various wireless broadcast and communication systems. In particular, broadband wireless broadcasting and communication systems marked by Orthogonal Frequency Division Multiplexing (OFDM) applications in recent years are more susceptible to interference from various narrowband noises. These narrow-band interferences may be sudden interferences such as external radio stations, other wireless devices or engines, or interferences introduced by the system itself during its working process. [0003] For the narrow-band interference falling outside the operating frequency range of the system, in the prior art, various filters are added in the receiving chain to eliminate the influence of the narrow-band interference as muc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/71H04B17/00
Inventor 胡长俊
Owner INNOFIDEI TECHNOLOGIES INC
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