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Anti-interference circuit, mobile terminal and method for suppressing harmonic interference

A mobile terminal and circuit technology, applied in the field of communications, can solve problems such as affecting the normal operation of mobile terminals, affecting user call quality, and adverse user experience, and achieving the effects of improving user experience, eliminating radio frequency interference, and ensuring normal operation.

Active Publication Date: 2016-12-14
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide an anti-jamming circuit, a mobile terminal and a method for suppressing harmonic interference, so as to solve the problem of high-order harmonics after frequency multiplication by means of Fourier series expansion and other methods due to clock output signals and other signals. Radio waves cause radio frequency interference, which not only affects the normal operation of the mobile terminal, but also affects the user's call quality, which is not conducive to the problem of user experience

Method used

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  • Anti-interference circuit, mobile terminal and method for suppressing harmonic interference
  • Anti-interference circuit, mobile terminal and method for suppressing harmonic interference
  • Anti-interference circuit, mobile terminal and method for suppressing harmonic interference

Examples

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no. 1 example

[0019] see figure 1 , figure 1 It is a schematic circuit diagram of the mobile terminal 100 provided by the embodiment of the present invention, such as figure 1 As shown, the mobile terminal 100 includes a drive circuit 110, a cache circuit 120, and an anti-jamming circuit 130. The input end of the drive circuit 110 is connected to the processor (not shown) of the mobile terminal 100 for The processor of the mobile terminal 100 is instructed to start outputting a driving signal, the output end of the driving circuit 110 is connected to the input end of the buffer circuit 120, and the buffer circuit 120 will receive the signal received from the driving circuit 110. After the waveform of the driving signal is adjusted, it is output as a communication signal of the mobile terminal 100, and the buffer circuit 120 also plays a certain protective role.

[0020] The input terminal of the anti-jamming circuit 130 is connected to the output terminal of the driving circuit 110, and i...

no. 2 example

[0033] see figure 2 , figure 2 is a flowchart of a method for suppressing harmonic interference provided by an embodiment of the present invention, such as figure 2 As shown, the method is applied to a mobile terminal, and the mobile terminal includes a driving circuit, a buffer circuit and an anti-interference circuit, the output end of the driving circuit is connected to the input end of the buffer circuit, and the input end of the anti-interference circuit terminal is connected with the output terminal of the driving circuit, and the output terminal of the anti-jamming circuit is connected with the output terminal of the buffer circuit, and the method includes the following steps:

[0034] Step 201, acquiring a fundamental frequency signal of a driving signal.

[0035] In this step, because when the mobile terminal is in different communication frequency bands, the base frequency signals in the communication signals sent are also different, and when the base frequency ...

no. 3 example

[0046] see image 3 , image 3 is a flowchart of a method for suppressing harmonic interference provided by an embodiment of the present invention, such as image 3 As shown, the method is applied to a mobile terminal, and the mobile terminal includes a driving circuit, a buffer circuit and an anti-interference circuit, the output end of the driving circuit is connected to the input end of the buffer circuit, and the input end of the anti-interference circuit terminal is connected with the output terminal of the driving circuit, and the output terminal of the anti-jamming circuit is connected with the output terminal of the buffer circuit, and the method includes the following steps:

[0047] Step 301, acquiring a fundamental frequency signal of a driving signal.

[0048] Step 302. Based on the base frequency signal, obtain an anti-interference signal that is opposite in phase to the interference signal generated after the frequency multiplication of the base frequency signa...

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Abstract

The invention provides an anti-interference circuit, a mobile terminal and a method for suppressing harmonic interference. The method comprises the following steps: acquiring a base frequency signal by detecting a frequency band in which the mobile terminal is positioned; performing frequency doubling, amplification and delay processing on the base frequency signal to obtain an anti-interference signal which has the same frequency and amplitude as an interference signal, and is reverse to the interference signal in phase; and outputting the anti-interference signal and a communication signal of the mobile terminal together in order to eliminate the interference signal in the communication signal. The base frequency signal is subjected to frequency doubling to generate the anti-interference signal which is reverse to the interference signal in phase, and the anti-interference signal is output together with the communication signal in order to offset the interference signal, so that radio frequency interference caused by higher harmonics generated by the base frequency signal in the communication signal is eliminated; normal running and conversation quality of the mobile terminal are ensured; and the user experience is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an anti-jamming circuit, a mobile terminal and a method for suppressing harmonic interference. Background technique [0002] With the continuous development of society and the continuous progress of science and technology, communication technology has been greatly developed, and more and more communication devices have entered people's lives and become an indispensable part of people's lives. Communication devices generally include telephones, mobile terminals, radio stations, exchanges, and the like. [0003] With the continuous increase of mobile terminals and the continuous growth of user demands, users pay more and more attention to the stability and reliability of mobile terminals. In the current mobile terminals, interference is one of the important factors affecting system indicators such as the call drop rate and connection rate of the wireless network. It not on...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B1/10
CPCH04B1/0475H04B1/10
Inventor 李文剑
Owner VIVO MOBILE COMM CO LTD
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