WO2017004983A1 - Method and device for inhibiting signal interference to usb interface, and computer storage medium - Google Patents

Method and device for inhibiting signal interference to usb interface, and computer storage medium Download PDF

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Publication number
WO2017004983A1
WO2017004983A1 PCT/CN2016/072304 CN2016072304W WO2017004983A1 WO 2017004983 A1 WO2017004983 A1 WO 2017004983A1 CN 2016072304 W CN2016072304 W CN 2016072304W WO 2017004983 A1 WO2017004983 A1 WO 2017004983A1
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Prior art keywords
frequency band
working frequency
current working
capacitor
subunit
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PCT/CN2016/072304
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French (fr)
Chinese (zh)
Inventor
李渭
高清敏
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中兴通讯股份有限公司
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Publication of WO2017004983A1 publication Critical patent/WO2017004983A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers

Definitions

  • the present invention relates to an electronic device signal processing technology in the field of communications, and in particular, to a method and apparatus for suppressing signal interference of a Universal Serial Bus (USB) port, and a computer storage medium.
  • USB Universal Serial Bus
  • USB interface is the most common standard transmission interface. At present, the theoretical data transmission rate of the mainstream USB 2.0 standard has reached 480 Mbps per second. However, with the increasing popularity of data media, users will encounter several GB or even tens of GB at the same time. Large file. If you still use the USB 2.0 standard, the speed is too slow. In this case, the USB 3.0 standard was introduced. USB 3.0 uses a new physical layer to separate the data transmission and acknowledgment processes with two channels, thus achieving a data transmission speed of 5 Gbps.
  • the most common way to interfere with the signal interference of the USB interface is to shield.
  • the method of soldering the shield frame cover on the USB interface is adopted to achieve the purpose of reducing interference.
  • the signal interference of the USB 3.0 interface is a wide frequency band. Signal interference, and it almost interferes with all working frequency bands on the terminal antenna. Therefore, the way of soldering the shield frame cover on the USB 3.0 interface has not achieved practical results, and the interference is still very strong. After scanning the interference source on the terminal board by the spectrum analyzer, it was found that even when the shield frame cover was soldered on the USB 3.0 interface, the interference source mainly came from the vicinity of the USB 3.0 interface, but there was no strong place in other parts of the motherboard. Interference signals exist.
  • the related technology adopts the measures of welding the shield frame cover to reduce the signal interference of the USB 3.0 interface, and the shielding effect cannot be obtained.
  • Embodiments of the present invention are directed to a method and apparatus for suppressing interference of a USB interface signal, and a computer storage medium, which can effectively suppress interference of a signal generated by a USB 3.0 interface to a receiving sensitivity of each working frequency band on a terminal antenna.
  • an embodiment of the present invention provides a method for suppressing signal interference of a universal serial bus (USB) port, where the method includes:
  • the grounding capacitor corresponding to the current working frequency band is controlled to be connected, and the grounding capacitor corresponding to the current working frequency band is used to suppress interference of the USB interface in the current working frequency band.
  • the controlling access to the grounding capacitor corresponding to the current working frequency band includes:
  • the control switch connects the grounding capacitor corresponding to the current working frequency band in the capacitor array.
  • the method further includes:
  • the control switch disconnects from any grounded capacitor in the capacitor array.
  • the controlling access to the grounding capacitor corresponding to the current working frequency band includes:
  • variable grounding capacitor is connected, the voltage value input to the variable grounding capacitor is controlled, and the capacitance value of the variable grounding capacitor is adjusted to a capacitance value of the grounding capacitor corresponding to the current working frequency band.
  • the method further includes:
  • the voltage value input to the variable grounding capacitor is controlled, and the variable grounding capacitance is adjusted to be invalid.
  • controlling access to the grounding capacitor corresponding to the current working frequency band further includes:
  • the ungrounded end of the grounding capacitor corresponding to the current working frequency band is connected to the common mode inductor front end of the terminal.
  • an embodiment of the present invention provides an apparatus for suppressing interference of a USB interface signal, including:
  • a detecting unit configured to detect whether the terminal performs data interaction through the USB interface
  • a frequency band obtaining unit configured to acquire a current working frequency band of the terminal antenna when the detecting unit detects that the terminal performs data interaction through the USB interface;
  • a capacitor control access unit configured to control access to a grounding capacitor corresponding to the current working frequency band detected by the frequency band detecting unit, where a grounding capacitor corresponding to the current working frequency band is used to suppress a USB interface in a current working frequency band interference.
  • the capacitor control access unit includes: a control subunit, a switch subunit, and a capacitor array subunit, wherein
  • the control subunit is configured to control the switch subunit to access a grounding capacitor corresponding to the current working frequency band in the capacitor array subunit.
  • control subunit is configured to control the switch subunit to disconnect from any grounding capacitor in the capacitor array subunit when the detecting unit detects that the terminal does not perform data interaction through the USB interface.
  • the capacitor control access unit includes: a voltage control subunit, and a variable ground capacitor subunit, wherein
  • a voltage control subunit configured to access a variable grounding capacitor subunit, control a voltage value input to the variable grounding capacitor subunit, and adjust a capacitance value of the variable grounding capacitor subunit to correspond to the current working frequency band The capacitance value of the grounding capacitor.
  • the voltage control subunit is further configured to detect that the terminal is not detected by the detecting unit.
  • the voltage value input to the variable grounding capacitor subunit is controlled, and the grounding capacitance of the variable grounding capacitor subunit is adjusted to be invalid.
  • the capacitor control access unit is further configured to connect an ungrounded end of the grounding capacitor corresponding to the current working frequency band to a common mode inductor front end of the terminal.
  • an embodiment of the present invention provides a computer storage medium, where the computer storage medium stores executable instructions, and the executable instructions are used to execute the foregoing method for suppressing interference of a USB interface signal.
  • the method and device for suppressing signal interference of a USB interface acquires a current working frequency band of the terminal antenna when detecting the data interaction of the terminal through the USB interface; and controls access to the grounding capacitance corresponding to the current working frequency band,
  • the grounding capacitor corresponding to the current working frequency band is used to suppress interference of the USB interface on the current working frequency band.
  • the technical solution provided by the embodiment of the present invention can transmit the interference signal to the ground of the terminal board through the grounding capacitor, so that the interference signal is filtered out, thereby effectively reducing the interference of the USB 3.0 interface in the current working frequency band.
  • the control accesses the corresponding grounding capacitor, and the grounding capacitance of the access changes according to the current working frequency band, which can effectively suppress the receiving sensitivity of the USB 3.0 interface to each working frequency band on the terminal antenna. Interference.
  • FIG. 1 is a schematic flowchart of a method for suppressing interference of a USB interface signal according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of an application architecture of a method for suppressing interference of a USB interface according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of another application architecture of a method for suppressing interference of a USB interface according to Embodiment 1 of the present invention.
  • FIG. 5 is a frequency spectrum diagram of an interference signal that is detected by using the method of this embodiment when the terminal works in the LTE band 7 frequency band according to Embodiment 1 of the present invention
  • FIG. 6 is a frequency spectrum diagram of an interference signal that is detected by a terminal when the USB 3.0 interface has no data interaction according to Embodiment 1 of the present invention
  • FIG. 7 is a structural block diagram of an apparatus for suppressing signal interference of a USB interface according to Embodiment 2 of the present invention.
  • FIG. 8 is a structural block diagram of another apparatus for suppressing signal interference of a USB interface according to Embodiment 2 of the present invention.
  • the inventor found that the receiving sensitivity index of almost all working frequency bands on the terminal antenna decreased by 4 dB (dB) compared with when there was no data interaction with the USB 3.0 interface when the USB 3.0 interface had data interaction.
  • dB dB
  • LTE Long Term Evolution
  • FDD Frequency Division Duplexing
  • TDD Time Division duplex
  • the sensitivity of the band 38/40/41 band has dropped by about 8 dB. The severity of these disturbances is undoubtedly fatal for wireless terminal products.
  • the embodiment of the present invention proposes to process interference of the USB 3.0 interface according to whether the terminal performs data interaction through the USB interface.
  • the embodiment of the present invention provides a method for suppressing signal interference of a USB interface.
  • the processing procedure of the method in this embodiment includes the following steps:
  • Step 101 When detecting that the terminal performs data interaction through the USB interface, detecting a current working frequency band of the terminal antenna.
  • the USB interface described in the method of this embodiment is a USB 3.0 interface.
  • the generated signal When the terminal performs data interaction through the USB 3.0 interface, the generated signal will have a large interference to the receiving sensitivity of the terminal antenna, and the USB 3.0 interface does not interfere with the receiving sensitivity of the antennas in different working frequency bands, in order to suppress these.
  • a device that suppresses interference of a USB interface signal (hereinafter referred to as a suppression device) with different degrees of interference first needs to acquire a current working frequency band of the terminal antenna when detecting that the terminal performs data interaction through the USB 3.0 interface. Then, step 102 is performed to specifically suppress the interference of the USB 3.0 interface to the receiving sensitivity of the terminal antenna in the current working frequency band.
  • the suppression device When the terminal transmits and receives data through the antenna, the information of the current working frequency band of the terminal antenna is written into the NV (Non-Volatile) register inside the terminal radio frequency chip, so that when the terminal continues to work through the antenna, the suppression device Firstly, it is determined whether the terminal performs data interaction through the USB 3.0 interface by determining the current magnitude on the USB 3.0 data line. If the current exceeds a certain value, it is determined that the terminal performs data interaction through the USB interface, and then the suppression device passes the NV register of the slave radio frequency chip. The information recorded in the information to obtain the current operating frequency band of the terminal antenna.
  • NV Non-Volatile
  • Step 102 Control access to a grounding capacitor corresponding to the current working frequency band.
  • the grounding capacitor corresponding to the current working frequency band is used to suppress interference of the USB 3.0 interface on the current working frequency band.
  • the grounding capacitor of the access In order to suppress the interference of the USB 3.0 interface in the current working frequency band, the grounding capacitor of the access needs to be grounded at one end, and one end is connected to the place where the common mode inductor front end of the motherboard chip of the terminal is close to the motherboard chip. Connect the ungrounded end of the grounding capacitor to the front-end common-mode inductor front end of the motherboard to transmit the signal to the common-mode inductor.
  • the interference signal generated by the USB 3.0 interface in the current working frequency band is transmitted to the ground of the terminal board through the grounding capacitor. So that the interference signal is filtered out, effectively reducing the interference of the USB 3.0 interface in the current working frequency band.
  • the first solution is that the terminal control switch connects the grounding capacitor corresponding to the current working frequency band in the capacitor array.
  • the application framework of the first solution is to provide a switch 202 at a front end of the motherboard chip common mode inductor 201 near the motherboard chip, and a capacitor array 203 is disposed.
  • the capacitor array 203 includes multiple grounds. Capacitor 2031, all grounding capacitors in the capacitor array 203 are grounded at one end and switch contacts at one end.
  • the suppression device may control the switch 202 to contact the switch contact of the grounding capacitor corresponding to the current working frequency band, and corresponding to the current working frequency band. Ground capacitor is connected.
  • the ungrounded end of the grounding capacitor is connected to the front end of the common-mode inductor of the main board chip of the terminal, so that the signal received by the antenna 200 in the current working frequency band can be transmitted to the total Before the mode inductor 201, the interference signal generated by the USB 3.0 interface in the current working frequency band is transmitted to the ground (ground) of the terminal board through the grounding capacitor, so that the interference signal is filtered out, and the working signal transmitted by the terminal antenna passes.
  • the common mode inductor 201 is transmitted to the USB 3.0 interface for data interaction with the terminal device, thereby ensuring the normal transmission of the working signal, reducing or eliminating the interference of the USB 3.0 interface on the receiving sensitivity of the current working frequency band of the terminal antenna.
  • the suppression device directly controls the switch to disconnect from any grounding capacitor in the capacitor array; when the terminal antenna works but the USB 3.0 interface has no data interaction At this time, the control switch is also disconnected from any grounding capacitor in the capacitor array; for both terminals, data is not passed through the USB interface. In the case of interaction, the grounding capacitor is not connected to the transmission link, which avoids the impact of the link on USB 2.0 data interaction and other usage scenarios.
  • the number of grounding capacitors in the capacitor array of the first scheme is not so much, which requires that the first scheme can only be used when the operating frequency of the terminal antenna is small. Can be applied.
  • the second solution is to connect the variable grounding capacitor, control the voltage value input to the variable grounding capacitor, and adjust the capacitance value of the variable grounding capacitor to the capacitance value of the grounding capacitor corresponding to the current working frequency band.
  • the application framework of the second solution is to set a voltage controller 302 at a position near the front end of the motherboard chip common mode inductor 301 of the terminal, and a voltage grounding capacitor is connected to the voltage controller 302. 303.
  • the voltage controller 302 can control a voltage value input to the variable grounding capacitor 303, and the variable grounding capacitor 303 The capacitance value is adjusted to the capacitance value of the grounding capacitor corresponding to the current working frequency band. In this way, the ungrounded end of the grounding capacitor is connected to the front end of the common-mode inductor of the main board chip of the terminal. After the signal received by the antenna 300 in the current working frequency band is transmitted, the signal can be transmitted to the common mode inductor 301, and the USB 3.0 interface is currently in use.
  • the interference signal generated in the working frequency band is transmitted to the ground of the terminal board through the grounding capacitor, so that the interference signal is filtered out, and the working signal transmitted by the terminal antenna is transmitted to the USB 3.0 interface through the common mode inductor 301 to interact with the terminal device for data interaction, thereby The normal transmission of the working signal is ensured, and the interference of the USB 3.0 interface on the receiving sensitivity of the current working frequency band of the terminal antenna is reduced or eliminated.
  • the USB 3.0 interface When the terminal antenna is not working, the USB 3.0 interface has no data interaction, the voltage input to the variable grounding capacitor is controlled, and the variable grounding capacitance is adjusted to be invalid; when the terminal antenna works but the USB 3.0 interface has no data. In the interaction, the voltage value input to the variable grounding capacitor is also controlled at this time, and the variable grounding capacitance is adjusted to be invalid; if the variable grounding capacitance is invalid here, the link of the variable grounding capacitor is unreachable. The signal cannot be transmitted through a variable grounding capacitor. In the case where the two terminals do not perform data interaction through the USB interface, the grounding capacitor is not connected to the working link, which avoids the impact of the working link on USB 2.0 data interaction and other usage scenarios.
  • the second solution only needs to connect a variable grounding capacitor, and adjust the capacitance value of the variable capacitor by controlling the voltage input to the variable grounding capacitor.
  • When detecting the current working frequency band directly input the capacitance of the variable grounding capacitor.
  • the value is adjusted to the capacitance value of the grounding capacitor corresponding to the current working frequency band, which is simple and convenient to operate, and can be applied to a scene in which the working frequency band of the terminal antenna is large.
  • the second scheme can be applied to implement the method in this embodiment. It is assumed that the terminal antenna is currently working in the LTE band 7 band, and the NV register inside the terminal is now the band information of the band 7, and the terminal is detected through the USB interface. When performing data interaction, the NV register can be detected to obtain the current working frequency band of the terminal antenna as LTE band 7, and then the control input is given a corresponding voltage value to the variable grounding capacitor, so that the capacitance value of the variable grounding capacitor becomes corresponding to the band 7 band debugging.
  • the capacitance value of a good grounding capacitor at which time the interference signal is transmitted to the ground (ground) of the main board through the variable grounding capacitor, and the signal normally transmitted through the USB 3.0 interface continues to be transmitted to the USB 3.0 through the common mode inductor.
  • the interface and the terminal device perform normal data interaction transmission, thereby achieving the purpose of eliminating interference signals, effectively suppressing the interference of the USB 3.0 interface on the receiving sensitivity of each working frequency band on the terminal antenna, and ensuring the radiation performance of the terminal during operation.
  • Figure 4 shows an interference signal that is scanned by the spectrum instrument without any measures when the terminal that uses the USB 3.0 interface for data transmission works in the LTE band 7 band. As can be seen from Figure 4, the interference signal is very obvious and from the entire band. 7 Receive frequency band 2620 ⁇ 2690MHz is generated, which indicates that the 3.0USB interference signal is a wide frequency band and a large amplitude signal.
  • FIG. 5 is an interference signal scanned by the spectrum apparatus after the second scheme of the method of the embodiment is used in the same scenario as that of FIG. 4;
  • FIG. 5 shows that the interference signal has decreased significantly compared with FIG.
  • the amplitude of the interference signal of the entire band 7 receiving frequency band 2620 ⁇ 2690MHz also decreases overall, from -100dBm in Figure 4 to -110dBm in Figure 5.
  • the interference suppression processing in the LTE band 7 frequency band is taken as an example, and the signal interference suppression scheme described above is also applicable to any communication frequency band of the terminal, such as LTE FDD.
  • Figure 6 is the result of the interference signal scanned by the terminal without data interaction on the USB 3.0 interface.
  • the embodiment of the present invention provides a device for suppressing signal interference of a USB interface.
  • the device includes: a detecting unit 701, a frequency band acquiring unit 702, and a capacitance control access unit 703, where
  • the detecting unit 701 is configured to detect whether the terminal performs data interaction through the USB interface.
  • the frequency band obtaining unit 702 is configured to acquire a current working frequency band of the terminal antenna when the detecting unit 701 detects that the terminal performs data interaction through the USB interface;
  • the capacitor control access unit 703 is configured to control access to a grounding capacitor corresponding to the current working frequency band acquired by the frequency band acquiring unit, where the grounding capacitor corresponding to the current working frequency band is used to suppress the USB interface from being in the current working frequency band. Interference.
  • the capacitance control access unit 703 includes: a control subunit 7031, a switch subunit 7032, and a capacitor array subunit 7033, where
  • the control subunit 7031 is configured to control the switch subunit 7032 to access a grounding capacitor corresponding to the current working frequency band in the capacitor array subunit 7033.
  • the control subunit 7031 is configured to control the switch subunit 7032 to be disconnected from the capacitor array subunit when the detecting unit 701 detects that the terminal does not perform data interaction through the USB interface. Connection of any of the grounding capacitors in 7033.
  • the capacitance control access unit 703 includes: a voltage control subunit 7034, and a variable grounding capacitor subunit 7035, where
  • the voltage control subunit 7034 is configured to access the variable grounding capacitor subunit 7035, control the voltage value input to the variable grounding capacitor subunit 7035, and adjust the capacitance value of the variable grounding capacitor subunit 7035 to the current The capacitance value of the grounding capacitor corresponding to the working frequency band.
  • the voltage control subunit 7034 is further configured to: when the detecting unit 701 detects that the terminal does not perform data interaction through the USB interface, control a voltage value input to the variable grounding capacitor subunit 7035, and the variable grounding capacitor subunit The grounding capacitance of the 7035 is adjusted to be invalid.
  • the capacitor control access unit 703 is configured to connect an ungrounded end of the grounding capacitor corresponding to the current working frequency band to a common mode inductor front end of the terminal.
  • the control subunit 7031 is configured to control the switch subunit 7032 to connect an ungrounded end of the current capacitor corresponding to the current working frequency band in the capacitor array subunit 7033 to the common mode inductor front end of the terminal.
  • the voltage control sub-unit 7034 is configured to connect one end of the variable grounding capacitor sub-unit 7035 to the common mode inductor front end of the terminal.
  • the detecting unit 701, the frequency band obtaining unit 702, the control subunit 7031, and the voltage control subunit 7034 may be configured by a central processing unit (CPU), a microprocessor (MPU), and a digital signal located on the opposite device.
  • CPU central processing unit
  • MPU microprocessor
  • DSP processor
  • FPGA field programmable gate array
  • the switch sub-unit 7032 can be implemented by a switching device, which can be implemented by a plurality of parallel grounded capacitors, the variable grounded capacitor sub-element 7035 being implemented by a variable capacitive device ground.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the present invention may employ computer-usable storage media (including but not limited to disks) in one or more of the computer-usable program code embodied therein. A form of computer program product embodied on a memory and optical storage, etc.).
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

A method and device for inhibiting the signal interference to a USB interface, and a computer storage medium. The method comprises: acquiring a current working frequency band of a terminal antenna (101) when it is detected that a terminal has data interaction by means of a USB interface; and controlling the access of a grounding capacitance corresponding to the current working frequency band (102), the grounding capacitance corresponding to the current working frequency band being used for inhibiting the interference to the USB interface at the current working frequency band.

Description

抑制USB接口信号干扰的方法及装置、计算机存储介质Method and device for suppressing signal interference of USB interface, computer storage medium 技术领域Technical field
本发明涉及通信领域的电子设备信号处理技术，尤其涉及一种抑制通用串行总线(USB，Universal Serial Bus)口信号干扰的方法及装置、计算机存储介质。The present invention relates to an electronic device signal processing technology in the field of communications, and in particular, to a method and apparatus for suppressing signal interference of a Universal Serial Bus (USB) port, and a computer storage medium.
背景技术Background technique
USB接口是最常见的标准传输接口，目前主流USB 2.0标准的理论数据传输速率已经达到了每秒480Mbps，但是，随着数据媒体的日益普及，用户随时会遇到同时传输几GB甚至几十GB的大文件。如果依然沿用USB 2.0标准，速度就太慢了。在这种情况下，推出了USB 3.0标准，USB 3.0采用一种新的物理层，用两个信道把数据传输和确认过程分离，因而达到了5Gbps的数据传输速度。The USB interface is the most common standard transmission interface. At present, the theoretical data transmission rate of the mainstream USB 2.0 standard has reached 480 Mbps per second. However, with the increasing popularity of data media, users will encounter several GB or even tens of GB at the same time. Large file. If you still use the USB 2.0 standard, the speed is too slow. In this case, the USB 3.0 standard was introduced. USB 3.0 uses a new physical layer to separate the data transmission and acknowledgment processes with two channels, thus achieving a data transmission speed of 5 Gbps.
目前，对USB接口的信号干扰问题采取最多的方式就是屏蔽，通常都采用在USB接口焊装屏蔽架罩的方式来达到减小干扰的目的，然而，由于USB 3.0接口的信号干扰是一个宽频段信号干扰，且其几乎对终端天线上的所有工作频段都会产生干扰，故在USB 3.0接口焊装屏蔽架罩的方式并未取得实际的效果，干扰依旧非常强烈。通过频谱仪在终端主板上扫描干扰源后发现，即使在USB 3.0接口焊装有屏蔽架罩的情况下，干扰源仍主要来自于USB 3.0接口附近，而在主板其它地方均未有较强烈的干扰信号存在。At present, the most common way to interfere with the signal interference of the USB interface is to shield. Generally, the method of soldering the shield frame cover on the USB interface is adopted to achieve the purpose of reducing interference. However, since the signal interference of the USB 3.0 interface is a wide frequency band. Signal interference, and it almost interferes with all working frequency bands on the terminal antenna. Therefore, the way of soldering the shield frame cover on the USB 3.0 interface has not achieved practical results, and the interference is still very strong. After scanning the interference source on the terminal board by the spectrum analyzer, it was found that even when the shield frame cover was soldered on the USB 3.0 interface, the interference source mainly came from the vicinity of the USB 3.0 interface, but there was no strong place in other parts of the motherboard. Interference signals exist.
综上，相关技术采取焊装屏蔽架罩的措施减小USB 3.0接口的信号干扰无法取得屏蔽效果。 In summary, the related technology adopts the measures of welding the shield frame cover to reduce the signal interference of the USB 3.0 interface, and the shielding effect cannot be obtained.
发明内容Summary of the invention
本发明实施例期望提供一种抑制USB接口信号干扰的方法及装置、计算机存储介质，可以有效抑制USB 3.0接口产生的信号对终端天线上各工作频段的接收灵敏度的干扰。Embodiments of the present invention are directed to a method and apparatus for suppressing interference of a USB interface signal, and a computer storage medium, which can effectively suppress interference of a signal generated by a USB 3.0 interface to a receiving sensitivity of each working frequency band on a terminal antenna.
本发明实施例的技术方案是这样实现的：The technical solution of the embodiment of the present invention is implemented as follows:
第一方面，本发明实施例提供一种抑制通用串行总线(USB)口信号干扰的方法，所述方法包括：In a first aspect, an embodiment of the present invention provides a method for suppressing signal interference of a universal serial bus (USB) port, where the method includes:
在检测到终端通过USB接口进行数据交互时，获取终端天线的当前工作频段；Obtaining a current working frequency band of the terminal antenna when detecting that the terminal performs data interaction through the USB interface;
控制接入与所述当前工作频段对应的接地电容，所述当前工作频段对应的接地电容用于抑制USB接口在当前工作频段上的干扰。The grounding capacitor corresponding to the current working frequency band is controlled to be connected, and the grounding capacitor corresponding to the current working frequency band is used to suppress interference of the USB interface in the current working frequency band.
上述方案中，所述控制接入与所述当前工作频段对应的接地电容，包括：In the above solution, the controlling access to the grounding capacitor corresponding to the current working frequency band includes:
控制开关将电容阵列中所述当前工作频段对应的接地电容接入。The control switch connects the grounding capacitor corresponding to the current working frequency band in the capacitor array.
上述方案中，所述方法还包括：In the above solution, the method further includes:
在检测到终端未通过USB接口进行数据交互时，控制开关断开与所述电容阵列中的任一接地电容的连接。When it is detected that the terminal does not perform data interaction through the USB interface, the control switch disconnects from any grounded capacitor in the capacitor array.
上述方案中，所述控制接入与所述当前工作频段对应的接地电容，包括：In the above solution, the controlling access to the grounding capacitor corresponding to the current working frequency band includes:
接入可变接地电容，控制输入给所述可变接地电容的电压值，将所述可变接地电容的电容值调整为所述当前工作频段对应的接地电容的电容值。The variable grounding capacitor is connected, the voltage value input to the variable grounding capacitor is controlled, and the capacitance value of the variable grounding capacitor is adjusted to a capacitance value of the grounding capacitor corresponding to the current working frequency band.
上述方案中，所述方法还包括：In the above solution, the method further includes:
在检测到终端未通过USB接口进行数据交互时，控制输入给可变接地电容的电压值，将所述可变接地电容调整为无效。 When it is detected that the terminal does not perform data interaction through the USB interface, the voltage value input to the variable grounding capacitor is controlled, and the variable grounding capacitance is adjusted to be invalid.
上述方案中，所述控制接入与所述当前工作频段对应的接地电容，还包括：In the above solution, the controlling access to the grounding capacitor corresponding to the current working frequency band further includes:
将所述当前工作频段对应的接地电容未接地的一端连通到终端的共模电感前端。The ungrounded end of the grounding capacitor corresponding to the current working frequency band is connected to the common mode inductor front end of the terminal.
第二方面，本发明实施例提供一种抑制USB接口信号干扰的装置，包括：In a second aspect, an embodiment of the present invention provides an apparatus for suppressing interference of a USB interface signal, including:
检测单元，用于检测终端是否通过USB接口进行数据交互；a detecting unit, configured to detect whether the terminal performs data interaction through the USB interface;
频段获取单元，用于在检测单元检测到终端通过USB接口进行数据交互时，获取终端天线的当前工作频段；a frequency band obtaining unit, configured to acquire a current working frequency band of the terminal antenna when the detecting unit detects that the terminal performs data interaction through the USB interface;
电容控制接入单元，用于控制接入与所述频段检测单元检测到的所述当前工作频段对应的接地电容，所述当前工作频段对应的接地电容用于抑制USB接口在当前工作频段上的干扰。a capacitor control access unit, configured to control access to a grounding capacitor corresponding to the current working frequency band detected by the frequency band detecting unit, where a grounding capacitor corresponding to the current working frequency band is used to suppress a USB interface in a current working frequency band interference.
上述方案中，所述电容控制接入单元包括：控制子单元、开关子单元和电容阵列子单元，其中，In the above solution, the capacitor control access unit includes: a control subunit, a switch subunit, and a capacitor array subunit, wherein
所述控制子单元，用于控制所述开关子单元将所述电容阵列子单元中所述当前工作频段对应的接地电容接入。The control subunit is configured to control the switch subunit to access a grounding capacitor corresponding to the current working frequency band in the capacitor array subunit.
上述方案中，所述控制子单元，用于在检测单元检测到终端未通过USB接口进行数据交互时，控制开关子单元断开与所述电容阵列子单元中的任一接地电容的连接。In the above solution, the control subunit is configured to control the switch subunit to disconnect from any grounding capacitor in the capacitor array subunit when the detecting unit detects that the terminal does not perform data interaction through the USB interface.
上述方案中，所述电容控制接入单元包括：电压控制子单元，可变接地电容子单元，其中，In the above solution, the capacitor control access unit includes: a voltage control subunit, and a variable ground capacitor subunit, wherein
电压控制子单元，用于接入可变接地电容子单元，控制输入给可变接地电容子单元的电压值，将所述可变接地电容子单元的电容值调整为所述当前工作频段对应的接地电容的电容值。a voltage control subunit, configured to access a variable grounding capacitor subunit, control a voltage value input to the variable grounding capacitor subunit, and adjust a capacitance value of the variable grounding capacitor subunit to correspond to the current working frequency band The capacitance value of the grounding capacitor.
上述方案中，所述电压控制子单元，还用于在检测单元检测到终端未 通过USB接口进行数据交互时，控制输入给可变接地电容子单元的电压值，将所述可变接地电容子单元的接地电容调整为无效。In the above solution, the voltage control subunit is further configured to detect that the terminal is not detected by the detecting unit. When data is exchanged through the USB interface, the voltage value input to the variable grounding capacitor subunit is controlled, and the grounding capacitance of the variable grounding capacitor subunit is adjusted to be invalid.
上述方案中，所述电容控制接入单元，还用于将所述当前工作频段对应的接地电容未接地的一端连通到终端的共模电感前端。In the above solution, the capacitor control access unit is further configured to connect an ungrounded end of the grounding capacitor corresponding to the current working frequency band to a common mode inductor front end of the terminal.
第三方面，本发明实施例提供一种计算机存储介质，所述计算机存储介质中存储有可执行指令，所述可执行指令用于执行上述的抑制USB接口信号干扰的方法。In a third aspect, an embodiment of the present invention provides a computer storage medium, where the computer storage medium stores executable instructions, and the executable instructions are used to execute the foregoing method for suppressing interference of a USB interface signal.
本发明实施例提供的抑制USB接口信号干扰的方法及装置，在检测到终端通过USB接口进行数据交互时，获取终端天线的当前工作频段；控制接入与所述当前工作频段对应的接地电容，所述当前工作频段对应的接地电容用于抑制USB接口在当前工作频段上的干扰。应用本发明实施例提供的技术方案可以将干扰信号通过接地电容传输到终端主板的地上，使得干扰信号被滤除，有效降低USB 3.0接口在当前工作频段上的干扰。本发明实施例中，对于当前工作频段，控制接入相应的接地电容，接入的接地电容随着当前工作频段的变化而变化，可以有效抑制USB 3.0接口对终端天线上各工作频段的接收灵敏度的干扰。The method and device for suppressing signal interference of a USB interface provided by the embodiment of the present invention acquires a current working frequency band of the terminal antenna when detecting the data interaction of the terminal through the USB interface; and controls access to the grounding capacitance corresponding to the current working frequency band, The grounding capacitor corresponding to the current working frequency band is used to suppress interference of the USB interface on the current working frequency band. The technical solution provided by the embodiment of the present invention can transmit the interference signal to the ground of the terminal board through the grounding capacitor, so that the interference signal is filtered out, thereby effectively reducing the interference of the USB 3.0 interface in the current working frequency band. In the embodiment of the present invention, for the current working frequency band, the control accesses the corresponding grounding capacitor, and the grounding capacitance of the access changes according to the current working frequency band, which can effectively suppress the receiving sensitivity of the USB 3.0 interface to each working frequency band on the terminal antenna. Interference.
附图说明DRAWINGS
图1为本发明实施例1提供的一种抑制USB接口信号干扰的方法流程示意图；1 is a schematic flowchart of a method for suppressing interference of a USB interface signal according to Embodiment 1 of the present invention;
图2为本发明实施例1提供的一种抑制USB接口信号干扰的方法应用架构示意图；2 is a schematic diagram of an application architecture of a method for suppressing interference of a USB interface according to Embodiment 1 of the present invention;
图3为本发明实施例1提供的另一种抑制USB接口信号干扰的方法应用架构示意图；3 is a schematic diagram of another application architecture of a method for suppressing interference of a USB interface according to Embodiment 1 of the present invention;
图4为本发明实施例1提供的终端工作在LTE band7频段时，不加措施直接扫出的干扰信号频谱图； 4 is a spectrum diagram of an interference signal that is directly swept out without a measure when the terminal operates in the LTE band 7 frequency band according to Embodiment 1 of the present invention;
图5为本发明实施例1提供的终端工作在LTE band7频段时，采用本实施例方法后扫出的干扰信号频谱图；FIG. 5 is a frequency spectrum diagram of an interference signal that is detected by using the method of this embodiment when the terminal works in the LTE band 7 frequency band according to Embodiment 1 of the present invention;
图6为本发明实施例1提供的终端在USB 3.0接口无数据交互时扫出的干扰信号频谱图；6 is a frequency spectrum diagram of an interference signal that is detected by a terminal when the USB 3.0 interface has no data interaction according to Embodiment 1 of the present invention;
图7为本发明实施例2提供的一种抑制USB接口信号干扰的装置结构框图；7 is a structural block diagram of an apparatus for suppressing signal interference of a USB interface according to Embodiment 2 of the present invention;
图8为本发明实施例2提供的另一种抑制USB接口信号干扰的装置结构框图。FIG. 8 is a structural block diagram of another apparatus for suppressing signal interference of a USB interface according to Embodiment 2 of the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.
发明人在使用有USB 3.0接口的无线终端时，发现USB 3.0接口有数据交互时与USB 3.0接口无数据交互时相比，终端天线上几乎所有工作频段的接收灵敏度指标整体下降了4分贝(dB)以上，其中长期演进(LTE，Long Term Evolution)频分双工(FDD，Frequency Division Duplexing)频段(band)1/3/5/7/8/20/28、时分双工(TDD，Time Division Duplexing)band38/40/41频段的灵敏度下降了8dB左右。这些干扰的严重程度对无线终端产品来说无疑是致命的。When using the wireless terminal with USB 3.0 interface, the inventor found that the receiving sensitivity index of almost all working frequency bands on the terminal antenna decreased by 4 dB (dB) compared with when there was no data interaction with the USB 3.0 interface when the USB 3.0 interface had data interaction. Above, among them, Long Term Evolution (LTE), Frequency Division Duplexing (FDD), band 1/3/5/7/8/20/28, time division duplex (TDD, Time Division) Duplexing) The sensitivity of the band 38/40/41 band has dropped by about 8 dB. The severity of these disturbances is undoubtedly fatal for wireless terminal products.
因此，本发明实施例提出根据终端是否通过USB接口进行数据交互的情况，对USB 3.0接口的干扰进行处理。Therefore, the embodiment of the present invention proposes to process interference of the USB 3.0 interface according to whether the terminal performs data interaction through the USB interface.
实施例1Example 1
本发明实施例提供了一种抑制USB接口信号干扰的方法，如图1所示，本实施例方法的处理流程包括以下步骤：The embodiment of the present invention provides a method for suppressing signal interference of a USB interface. As shown in FIG. 1 , the processing procedure of the method in this embodiment includes the following steps:
步骤101、在检测到终端通过USB接口进行数据交互时，检测终端天线的当前工作频段。 Step 101: When detecting that the terminal performs data interaction through the USB interface, detecting a current working frequency band of the terminal antenna.
本实施例方法中所述的USB接口为USB 3.0接口。The USB interface described in the method of this embodiment is a USB 3.0 interface.
当终端通过USB 3.0接口进行数据交互时，产生的信号会对终端天线的接收灵敏度产生较大干扰，USB 3.0接口对处于不同工作频段的天线的接收灵敏度产生的干扰程度并不相同，为了抑制这些不同程度的干扰，抑制USB接口信号干扰的装置(以下称为抑制装置)首先需要在检测到终端通过USB 3.0接口进行数据交互时获取终端天线的当前工作频段。然后进行步骤102有针对性地抑制USB 3.0接口对处于当前工作频段的终端天线的接收灵敏度的干扰。When the terminal performs data interaction through the USB 3.0 interface, the generated signal will have a large interference to the receiving sensitivity of the terminal antenna, and the USB 3.0 interface does not interfere with the receiving sensitivity of the antennas in different working frequency bands, in order to suppress these. A device that suppresses interference of a USB interface signal (hereinafter referred to as a suppression device) with different degrees of interference first needs to acquire a current working frequency band of the terminal antenna when detecting that the terminal performs data interaction through the USB 3.0 interface. Then, step 102 is performed to specifically suppress the interference of the USB 3.0 interface to the receiving sensitivity of the terminal antenna in the current working frequency band.
终端通过天线收发数据时，会将终端天线的当前工作频段的信息写入终端射频芯片内部的NV(Non-Volatile，非易失性)寄存器中，这样，当终端通过天线继续工作时，抑制装置首先通过判定USB 3.0数据线上的电流大小来判定终端是否通过USB 3.0接口进行数据交互，若电流超过一定值，则判定终端通过USB接口进行数据交互，然后抑制装置再通过从射频芯片的NV寄存器信息中记录的信息来获取终端天线的当前工作频段。When the terminal transmits and receives data through the antenna, the information of the current working frequency band of the terminal antenna is written into the NV (Non-Volatile) register inside the terminal radio frequency chip, so that when the terminal continues to work through the antenna, the suppression device Firstly, it is determined whether the terminal performs data interaction through the USB 3.0 interface by determining the current magnitude on the USB 3.0 data line. If the current exceeds a certain value, it is determined that the terminal performs data interaction through the USB interface, and then the suppression device passes the NV register of the slave radio frequency chip. The information recorded in the information to obtain the current operating frequency band of the terminal antenna.
步骤102、控制接入与所述当前工作频段对应的接地电容。Step 102: Control access to a grounding capacitor corresponding to the current working frequency band.
所述当前工作频段对应的接地电容用于抑制USB 3.0接口在所述当前工作频段上的干扰。The grounding capacitor corresponding to the current working frequency band is used to suppress interference of the USB 3.0 interface on the current working frequency band.
为了抑制USB 3.0接口在所述当前工作频段上的干扰，接入的接地电容需要一端接地，一端连通到终端的主板芯片共模电感前端靠近主板芯片的地方。将接地电容未接地一端连通到终端的主板芯片共模电感前端，可以使信号传输到共模电感前，已将USB 3.0接口在当前工作频段上产生的干扰信号通过接地电容传输到终端主板的地上，使得干扰信号被滤除，有效降低USB 3.0接口在当前工作频段上的干扰。根据计算公式可知，对于当前工作频段f对应有一个接地电容C可以抑制USB 3.0接口在当前工作频段f上的干扰，因此，对工作频段较多的无线终端产品来说，就需要多个 对应的接地电容来消除USB 3.0接口的信号干扰。终端检测到终端通过USB 3.0接口进行数据交互且检测到终端的当前工作频段后，终端可以自动控制接入与所述当前工作频段对应的接地电容，来抑制USB 3.0接口在所述当前工作频段上的干扰。In order to suppress the interference of the USB 3.0 interface in the current working frequency band, the grounding capacitor of the access needs to be grounded at one end, and one end is connected to the place where the common mode inductor front end of the motherboard chip of the terminal is close to the motherboard chip. Connect the ungrounded end of the grounding capacitor to the front-end common-mode inductor front end of the motherboard to transmit the signal to the common-mode inductor. The interference signal generated by the USB 3.0 interface in the current working frequency band is transmitted to the ground of the terminal board through the grounding capacitor. So that the interference signal is filtered out, effectively reducing the interference of the USB 3.0 interface in the current working frequency band. According to the calculation formula, it is known that there is a grounding capacitor C corresponding to the current working frequency band f, which can suppress the interference of the USB 3.0 interface in the current working frequency band f. Therefore, for a wireless terminal product with a large working frequency band, multiple Corresponding grounding capacitors eliminate signal interference on the USB 3.0 interface. After the terminal detects that the terminal performs data interaction through the USB 3.0 interface and detects the current working frequency band of the terminal, the terminal can automatically control access to the grounding capacitor corresponding to the current working frequency band to suppress the USB 3.0 interface from being in the current working frequency band. Interference.
本实施例方法中，控制接入与所述当前工作频段对应的接地电容有两种方案：In the method of this embodiment, there are two schemes for controlling access to the grounding capacitor corresponding to the current working frequency band:
第一种方案是终端控制开关将电容阵列中所述当前工作频段对应的接地电容接入。如图2所示，第一种方案的应用构架为在终端的主板芯片共模电感201前端靠近主板芯片的地方设置一个开关202，并设置一个电容阵列203，该电容阵列203中包括多个接地电容2031，电容阵列203中的所有接地电容都一端接地，一端为开关触点。抑制装置在检测到终端通过USB 3.0接口进行数据交互且检测到终端的当前工作频段后，可以控制开关202接触所述当前工作频段对应的接地电容的开关触点，将所述当前工作频段对应的接地电容接入。当开关与对应的接地电容接通后，就将接地电容未接地一端连接在终端的主板芯片共模电感前端，这样天线200在当前工作频段接收到的信号传输过来后，可以使信号传输到共模电感201前，已将USB 3.0接口在当前工作频段上产生的干扰信号通过接地电容传输到终端主板的地(接地端)上，使得干扰信号被滤除，而终端天线所传输的工作信号通过共模电感201传输到USB 3.0接口与终端设备进行数据交互，从而保证了工作信号正常传输，减小或消除了USB 3.0接口对终端天线当前工作频段的接收灵敏度的干扰。The first solution is that the terminal control switch connects the grounding capacitor corresponding to the current working frequency band in the capacitor array. As shown in FIG. 2, the application framework of the first solution is to provide a switch 202 at a front end of the motherboard chip common mode inductor 201 near the motherboard chip, and a capacitor array 203 is disposed. The capacitor array 203 includes multiple grounds. Capacitor 2031, all grounding capacitors in the capacitor array 203 are grounded at one end and switch contacts at one end. After detecting that the terminal performs data interaction through the USB 3.0 interface and detects the current working frequency band of the terminal, the suppression device may control the switch 202 to contact the switch contact of the grounding capacitor corresponding to the current working frequency band, and corresponding to the current working frequency band. Ground capacitor is connected. After the switch is connected to the corresponding grounding capacitor, the ungrounded end of the grounding capacitor is connected to the front end of the common-mode inductor of the main board chip of the terminal, so that the signal received by the antenna 200 in the current working frequency band can be transmitted to the total Before the mode inductor 201, the interference signal generated by the USB 3.0 interface in the current working frequency band is transmitted to the ground (ground) of the terminal board through the grounding capacitor, so that the interference signal is filtered out, and the working signal transmitted by the terminal antenna passes. The common mode inductor 201 is transmitted to the USB 3.0 interface for data interaction with the terminal device, thereby ensuring the normal transmission of the working signal, reducing or eliminating the interference of the USB 3.0 interface on the receiving sensitivity of the current working frequency band of the terminal antenna.
当终端天线未进行工作，USB 3.0接口也就没有数据交互时，抑制装置直接控制开关断开与所述电容阵列中的任一接地电容的连接；当终端天线进行工作但USB 3.0接口无数据交互时，此时也控制开关断开与所述电容阵列中的任一接地电容的连接；对于这两种终端未通过USB接口进行数据 交互的情况，接地电容未接入到传输链路中，避免了对链路在USB 2.0数据交互时及其它使用场景下产生影响。When the terminal antenna is not working, and the USB 3.0 interface has no data interaction, the suppression device directly controls the switch to disconnect from any grounding capacitor in the capacitor array; when the terminal antenna works but the USB 3.0 interface has no data interaction At this time, the control switch is also disconnected from any grounding capacitor in the capacitor array; for both terminals, data is not passed through the USB interface. In the case of interaction, the grounding capacitor is not connected to the transmission link, which avoids the impact of the link on USB 2.0 data interaction and other usage scenarios.
由于现在对终端及终端主板尺寸要求越来越小，故第一种方案的电容阵列中的接地电容的数目不易太多，这就要求第一种方案只能在终端天线的工作频段较少时才能应用。Since the size requirements of the terminal and the terminal board are getting smaller and smaller, the number of grounding capacitors in the capacitor array of the first scheme is not so much, which requires that the first scheme can only be used when the operating frequency of the terminal antenna is small. Can be applied.
第二种方案是接入可变接地电容，控制输入给可变接地电容的电压值，将所述可变接地电容的电容值调整为所述当前工作频段对应的接地电容的电容值。如图3所示，第二种方案的应用构架为在终端的主板芯片共模电感301前端靠近主板芯片的位置设置一个电压控制器302，所述电压控制器302上连接有一个可变接地电容303，抑制装置在检测到终端通过USB 3.0接口进行数据交互且检测到终端的当前工作频段后，电压控制器302可以控制输入给可变接地电容303的电压值，将所述可变接地电容303的电容值调整为所述当前工作频段对应的接地电容的电容值。这样将接地电容未接地一端连接在终端的主板芯片共模电感前端，天线300在当前工作频段接收到的信号传输过来后，可以使信号传输到共模电感301前，已将USB 3.0接口在当前工作频段上产生的干扰信号通过接地电容传输到终端主板的地上，使得干扰信号被滤除，而终端天线所传输的工作信号通过共模电感301传输到USB 3.0接口与终端设备进行数据交互，从而保证了工作信号正常传输，减小或消除了USB 3.0接口对终端天线当前工作频段的接收灵敏度的干扰。The second solution is to connect the variable grounding capacitor, control the voltage value input to the variable grounding capacitor, and adjust the capacitance value of the variable grounding capacitor to the capacitance value of the grounding capacitor corresponding to the current working frequency band. As shown in FIG. 3, the application framework of the second solution is to set a voltage controller 302 at a position near the front end of the motherboard chip common mode inductor 301 of the terminal, and a voltage grounding capacitor is connected to the voltage controller 302. 303. After detecting that the terminal performs data interaction through the USB 3.0 interface and detects the current working frequency band of the terminal, the voltage controller 302 can control a voltage value input to the variable grounding capacitor 303, and the variable grounding capacitor 303 The capacitance value is adjusted to the capacitance value of the grounding capacitor corresponding to the current working frequency band. In this way, the ungrounded end of the grounding capacitor is connected to the front end of the common-mode inductor of the main board chip of the terminal. After the signal received by the antenna 300 in the current working frequency band is transmitted, the signal can be transmitted to the common mode inductor 301, and the USB 3.0 interface is currently in use. The interference signal generated in the working frequency band is transmitted to the ground of the terminal board through the grounding capacitor, so that the interference signal is filtered out, and the working signal transmitted by the terminal antenna is transmitted to the USB 3.0 interface through the common mode inductor 301 to interact with the terminal device for data interaction, thereby The normal transmission of the working signal is ensured, and the interference of the USB 3.0 interface on the receiving sensitivity of the current working frequency band of the terminal antenna is reduced or eliminated.
当终端天线未进行工作，USB 3.0接口也就没有数据交互时，控制输入给可变接地电容的电压值，将所述可变接地电容调整为无效；当终端天线进行工作但USB 3.0接口无数据交互时，此时也控制输入给可变接地电容的电压值，将所述可变接地电容调整为无效；这里所述的可变接地电容为无效是指可变接地电容这条链路不通，信号不能通过可变接地电容传输。 对于这两种终端未通过USB接口进行数据交互的情况，接地电容未接入到工作链路中，避免了对工作链路在USB 2.0数据交互时及其它使用场景下产生影响。When the terminal antenna is not working, the USB 3.0 interface has no data interaction, the voltage input to the variable grounding capacitor is controlled, and the variable grounding capacitance is adjusted to be invalid; when the terminal antenna works but the USB 3.0 interface has no data. In the interaction, the voltage value input to the variable grounding capacitor is also controlled at this time, and the variable grounding capacitance is adjusted to be invalid; if the variable grounding capacitance is invalid here, the link of the variable grounding capacitor is unreachable. The signal cannot be transmitted through a variable grounding capacitor. In the case where the two terminals do not perform data interaction through the USB interface, the grounding capacitor is not connected to the working link, which avoids the impact of the working link on USB 2.0 data interaction and other usage scenarios.
第二种方案只需要接入一个可变接地电容，通过控制输入给该可变接地电容的电压来调整可变电容的电容值，在检测到当前工作频段时，直接将可变接地电容的电容值调整到当前工作频段对应的接地电容的电容值，简单方便易操作，可以应用于终端天线的工作频段较多的场景中。The second solution only needs to connect a variable grounding capacitor, and adjust the capacitance value of the variable capacitor by controlling the voltage input to the variable grounding capacitor. When detecting the current working frequency band, directly input the capacitance of the variable grounding capacitor. The value is adjusted to the capacitance value of the grounding capacitor corresponding to the current working frequency band, which is simple and convenient to operate, and can be applied to a scene in which the working frequency band of the terminal antenna is large.
示例的，可以应用第二种方案来实施本实施例方法，假设终端天线当前工作在LTE band 7频段，终端内部的NV寄存器中此时也就是band 7的频段信息，在检测到终端通过USB接口进行数据交互时，可以检测NV寄存器获得终端天线的当前工作频段为LTE band 7，而后控制输入给可变接地电容一个相应的电压值，使得可变接地电容的电容值变成对应band 7频段调试好的接地电容的电容值，此时干扰信号就通过该可变接地电容传输到主板的地(接地端)上，而正常通过USB 3.0接口进行传输的信号则继续通过共模电感传到USB 3.0接口与终端设备进行正常的数据交互传输，从而实现了消除干扰信号的目的，有效抑制了USB 3.0接口对终端天线上各工作频段的接收灵敏度的干扰，保证了终端工作时的辐射性能。For example, the second scheme can be applied to implement the method in this embodiment. It is assumed that the terminal antenna is currently working in the LTE band 7 band, and the NV register inside the terminal is now the band information of the band 7, and the terminal is detected through the USB interface. When performing data interaction, the NV register can be detected to obtain the current working frequency band of the terminal antenna as LTE band 7, and then the control input is given a corresponding voltage value to the variable grounding capacitor, so that the capacitance value of the variable grounding capacitor becomes corresponding to the band 7 band debugging. The capacitance value of a good grounding capacitor, at which time the interference signal is transmitted to the ground (ground) of the main board through the variable grounding capacitor, and the signal normally transmitted through the USB 3.0 interface continues to be transmitted to the USB 3.0 through the common mode inductor. The interface and the terminal device perform normal data interaction transmission, thereby achieving the purpose of eliminating interference signals, effectively suppressing the interference of the USB 3.0 interface on the receiving sensitivity of each working frequency band on the terminal antenna, and ensuring the radiation performance of the terminal during operation.
图4是某应用USB 3.0接口进行数据传输的终端工作在LTE band 7频段时，不加措施利用频谱仪器扫描出的干扰信号；从图4中可以看出，干扰信号非常明显，且从整个band 7接收频段2620～2690MHz均有产生，这说明3.0USB干扰信号是一个宽频段且幅度较大的信号。Figure 4 shows an interference signal that is scanned by the spectrum instrument without any measures when the terminal that uses the USB 3.0 interface for data transmission works in the LTE band 7 band. As can be seen from Figure 4, the interference signal is very obvious and from the entire band. 7 Receive frequency band 2620 ~ 2690MHz is generated, which indicates that the 3.0USB interference signal is a wide frequency band and a large amplitude signal.
图5是该终端在与图4相同的场景下，采用本实施例方法的第二种方案后，利用频谱仪器扫描出的干扰信号；从图5看，干扰信号较图4已经有明显下降，且整个band 7接收频段2620～2690MHz干扰信号幅度也整体下降，从图4的-100dBm降低到图5的-110dBm。 FIG. 5 is an interference signal scanned by the spectrum apparatus after the second scheme of the method of the embodiment is used in the same scenario as that of FIG. 4; FIG. 5 shows that the interference signal has decreased significantly compared with FIG. And the amplitude of the interference signal of the entire band 7 receiving frequency band 2620 ~ 2690MHz also decreases overall, from -100dBm in Figure 4 to -110dBm in Figure 5.
需要指出的是，本发明实施例上述记载的方案中是以LTE band 7频段的干扰抑制处理为例进行说明，上述记载的信号干扰的抑制方案同样适用于终端的任意通信频段，如LTE FDD的其他band 1/3/5/8/20/28频段，以及LTE FDD band 38/40/41频段。It should be noted that, in the foregoing description of the embodiments of the present invention, the interference suppression processing in the LTE band 7 frequency band is taken as an example, and the signal interference suppression scheme described above is also applicable to any communication frequency band of the terminal, such as LTE FDD. Other band 1/3/5/8/20/28 bands, and LTE FDD band 38/40/41 bands.
图6是在终端在USB 3.0接口无数据交互下扫描出的干扰信号结果。Figure 6 is the result of the interference signal scanned by the terminal without data interaction on the USB 3.0 interface.
从图6和图5的对比可以看出，两图中扫出的频谱信号均值都在-110dBm左右，即这两种情况下干扰信号强度相同，也就是图5中采用本实施例方法，干扰信号已经明显降低。图6信号频谱中间较高部分，是此时与样机建立连接时仪表的工作频段，因此探头测出的信号幅度值较高。It can be seen from the comparison between Fig. 6 and Fig. 5 that the mean value of the spectrum signals swept out in both figures is about -110 dBm, that is, the interference signal strength is the same in both cases, that is, the method of this embodiment is used in FIG. The signal has been significantly reduced. The middle part of the signal spectrum in Figure 6 is the working frequency band of the meter when the connection is established with the prototype at this time, so the signal amplitude value measured by the probe is higher.
实施例2、Example 2
本发明实施例提供了一种抑制USB接口信号干扰的装置，如图7或图8所示，所述装置包括：检测单元701、频段获取单元702、电容控制接入单元703，其中，The embodiment of the present invention provides a device for suppressing signal interference of a USB interface. As shown in FIG. 7 or FIG. 8 , the device includes: a detecting unit 701, a frequency band acquiring unit 702, and a capacitance control access unit 703, where
检测单元701，用于检测终端是否通过USB接口进行数据交互；The detecting unit 701 is configured to detect whether the terminal performs data interaction through the USB interface.
频段获取单元702，用于在检测单元701检测到终端通过USB接口进行数据交互时，获取终端天线的当前工作频段；The frequency band obtaining unit 702 is configured to acquire a current working frequency band of the terminal antenna when the detecting unit 701 detects that the terminal performs data interaction through the USB interface;
电容控制接入单元703，用于控制接入与所述频段获取单元获取到的所述当前工作频段对应的接地电容，所述当前工作频段对应的接地电容用于抑制USB接口在当前工作频段上的干扰。The capacitor control access unit 703 is configured to control access to a grounding capacitor corresponding to the current working frequency band acquired by the frequency band acquiring unit, where the grounding capacitor corresponding to the current working frequency band is used to suppress the USB interface from being in the current working frequency band. Interference.
如图7所示，所述电容控制接入单元703包括：控制子单元7031、开关子单元7032和电容阵列子单元7033，其中，As shown in FIG. 7, the capacitance control access unit 703 includes: a control subunit 7031, a switch subunit 7032, and a capacitor array subunit 7033, where
所述控制子单元7031，用于控制所述开关子单元7032将所述电容阵列子单元7033中所述当前工作频段对应的接地电容接入。The control subunit 7031 is configured to control the switch subunit 7032 to access a grounding capacitor corresponding to the current working frequency band in the capacitor array subunit 7033.
所述控制子单元7031，用于在检测单元701检测到终端未通过USB接口进行数据交互时，控制所述开关子单元7032断开与所述电容阵列子单元 7033中的任一接地电容的连接。The control subunit 7031 is configured to control the switch subunit 7032 to be disconnected from the capacitor array subunit when the detecting unit 701 detects that the terminal does not perform data interaction through the USB interface. Connection of any of the grounding capacitors in 7033.
或者，如图8所示，所述电容控制接入单元703包括：电压控制子单元7034、可变接地电容子单元7035，其中，Alternatively, as shown in FIG. 8, the capacitance control access unit 703 includes: a voltage control subunit 7034, and a variable grounding capacitor subunit 7035, where
电压控制子单元7034，用于接入可变接地电容子单元7035，控制输入给可变接地电容子单元7035的电压值，将所述可变接地电容子单元7035的电容值调整为所述当前工作频段对应的接地电容的电容值。The voltage control subunit 7034 is configured to access the variable grounding capacitor subunit 7035, control the voltage value input to the variable grounding capacitor subunit 7035, and adjust the capacitance value of the variable grounding capacitor subunit 7035 to the current The capacitance value of the grounding capacitor corresponding to the working frequency band.
所述电压控制子单元7034，还用于在检测单元701检测到终端未通过USB接口进行数据交互时，控制输入给可变接地电容子单元7035的电压值，将所述可变接地电容子单元7035的接地电容调整为无效。The voltage control subunit 7034 is further configured to: when the detecting unit 701 detects that the terminal does not perform data interaction through the USB interface, control a voltage value input to the variable grounding capacitor subunit 7035, and the variable grounding capacitor subunit The grounding capacitance of the 7035 is adjusted to be invalid.
所述电容控制接入单元703，用于将所述当前工作频段对应的接地电容未接地的一端连通到终端的共模电感前端。例如，所述控制子单元7031，用于控制所述开关子单元7032将所述电容阵列子单元7033中所述当前工作频段对应的接地电容未接地的一端连通到终端的共模电感前端。或者所述电压控制子单元7034，用于将可变接地电容子单元7035未接地的一端连通到终端的共模电感前端。The capacitor control access unit 703 is configured to connect an ungrounded end of the grounding capacitor corresponding to the current working frequency band to a common mode inductor front end of the terminal. For example, the control subunit 7031 is configured to control the switch subunit 7032 to connect an ungrounded end of the current capacitor corresponding to the current working frequency band in the capacitor array subunit 7033 to the common mode inductor front end of the terminal. Or the voltage control sub-unit 7034 is configured to connect one end of the variable grounding capacitor sub-unit 7035 to the common mode inductor front end of the terminal.
在实际应用中，所述检测单元701、频段获取单元702、控制子单元7031、电压控制子单元7034可以由位于对端设备上的中央处理器(CPU)、微处理器(MPU)、数字信号处理器(DSP)或现场可编程门阵列(FPGA)等器件实现。所述开关子单元7032可以由开关器件实现，所述电容阵列子单元7033可以由多个并联的接地电容实现，所述可变接地电容子单元7035由一个可变电容器件接地实现。In practical applications, the detecting unit 701, the frequency band obtaining unit 702, the control subunit 7031, and the voltage control subunit 7034 may be configured by a central processing unit (CPU), a microprocessor (MPU), and a digital signal located on the opposite device. Device implementations such as a processor (DSP) or a field programmable gate array (FPGA). The switch sub-unit 7032 can be implemented by a switching device, which can be implemented by a plurality of parallel grounded capacitors, the variable grounded capacitor sub-element 7035 being implemented by a variable capacitive device ground.
本领域内的技术人员应明白，本发明的实施例可提供为方法、***、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘 存储器和光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the present invention may employ computer-usable storage media (including but not limited to disks) in one or more of the computer-usable program code embodied therein. A form of computer program product embodied on a memory and optical storage, etc.).
本发明是参照根据本发明实施例的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。 The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims (13)

  1. 一种抑制通用串行总线USB接口信号干扰的方法，所述方法包括：A method of suppressing signal interference of a universal serial bus USB interface, the method comprising:
    在检测到终端通过USB接口进行数据交互时，获取终端天线的当前工作频段；Obtaining a current working frequency band of the terminal antenna when detecting that the terminal performs data interaction through the USB interface;
    控制接入与所述当前工作频段对应的接地电容，所述当前工作频段对应的接地电容用于抑制所述USB接口在所述当前工作频段上的干扰。The grounding capacitor corresponding to the current working frequency band is controlled to be connected, and the grounding capacitor corresponding to the current working frequency band is used to suppress interference of the USB interface on the current working frequency band.
  2. 根据权利要求1所述的方法，其中，所述控制接入与所述当前工作频段对应的接地电容，包括：The method according to claim 1, wherein the controlling access to a grounding capacitance corresponding to the current working frequency band comprises:
    控制开关将电容阵列中所述当前工作频段对应的接地电容接入。The control switch connects the grounding capacitor corresponding to the current working frequency band in the capacitor array.
  3. 根据权利要求2所述的方法，其中，所述方法还包括：The method of claim 2, wherein the method further comprises:
    在检测到终端未通过所述USB接口进行数据交互时，控制开关断开与所述电容阵列中的任一接地电容的连接。When it is detected that the terminal does not perform data interaction through the USB interface, the control switch disconnects from any grounded capacitor in the capacitor array.
  4. 根据权利要求1所述的方法，其中，所述控制接入与所述当前工作频段对应的接地电容，包括：The method according to claim 1, wherein the controlling access to a grounding capacitance corresponding to the current working frequency band comprises:
    接入可变接地电容，控制输入给所述可变接地电容的电压值，将所述可变接地电容的电容值调整为所述当前工作频段对应的接地电容的电容值。The variable grounding capacitor is connected, the voltage value input to the variable grounding capacitor is controlled, and the capacitance value of the variable grounding capacitor is adjusted to a capacitance value of the grounding capacitor corresponding to the current working frequency band.
  5. 根据权利要求4所述的方法，其中，所述方法还包括：The method of claim 4 wherein the method further comprises:
    在检测到所述终端未通过所述USB接口进行数据交互时，控制输入给可变接地电容的电压值，将所述可变接地电容调整为无效。When it is detected that the terminal does not perform data interaction through the USB interface, the voltage value input to the variable grounding capacitor is controlled, and the variable grounding capacitance is adjusted to be invalid.
  6. 根据权利要求2或4所述的方法，其中，所述控制接入与所述当前工作频段对应的接地电容，还包括：The method according to claim 2 or 4, wherein the controlling access to the grounding capacitance corresponding to the current working frequency band further comprises:
    将所述当前工作频段对应的接地电容未接地的一端连通到所述终端的共模电感前端。The ungrounded end of the grounding capacitor corresponding to the current working frequency band is connected to the common mode inductor front end of the terminal.
  7. 一种抑制通用串行总线USB接口信号干扰的装置，包括： A device for suppressing signal interference of a universal serial bus USB interface, comprising:
    检测单元，用于检测终端是否通过USB接口进行数据交互；a detecting unit, configured to detect whether the terminal performs data interaction through the USB interface;
    频段获取单元，用于在检测单元检测到终端通过USB接口进行数据交互时，获取终端天线的当前工作频段；a frequency band obtaining unit, configured to acquire a current working frequency band of the terminal antenna when the detecting unit detects that the terminal performs data interaction through the USB interface;
    电容控制接入单元，用于控制接入与所述频段检测单元检测到的所述当前工作频段对应的接地电容，所述当前工作频段对应的接地电容用于抑制USB接口在当前工作频段上的干扰。a capacitor control access unit, configured to control access to a grounding capacitor corresponding to the current working frequency band detected by the frequency band detecting unit, where a grounding capacitor corresponding to the current working frequency band is used to suppress a USB interface in a current working frequency band interference.
  8. 根据权利要求7所述的装置，其中，所述电容控制接入单元包括：控制子单元、开关子单元和电容阵列子单元，其中，The device according to claim 7, wherein the capacitance control access unit comprises: a control subunit, a switch subunit, and a capacitor array subunit, wherein
    所述控制子单元，用于控制所述开关子单元将所述电容阵列子单元中所述当前工作频段对应的接地电容接入。The control subunit is configured to control the switch subunit to access a grounding capacitor corresponding to the current working frequency band in the capacitor array subunit.
  9. 根据权利要求8所述的装置，其中，The device according to claim 8, wherein
    所述控制子单元，用于在检测单元检测到终端未通过USB接口进行数据交互时，控制开关子单元断开与所述电容阵列子单元中的任一接地电容的连接。The control subunit is configured to: when the detecting unit detects that the terminal does not perform data interaction through the USB interface, the control switch subunit disconnects from any one of the capacitor array subunits.
  10. 根据权利要求7所述的装置，其中，所述电容控制接入单元包括：电压控制子单元，可变接地电容子单元，其中，The device according to claim 7, wherein the capacitance control access unit comprises: a voltage control subunit, a variable ground capacitance subunit, wherein
    电压控制子单元，用于接入可变接地电容子单元，控制输入给可变接地电容子单元的电压值，将所述可变接地电容子单元的电容值调整为所述当前工作频段对应的接地电容的电容值。a voltage control subunit, configured to access a variable grounding capacitor subunit, control a voltage value input to the variable grounding capacitor subunit, and adjust a capacitance value of the variable grounding capacitor subunit to correspond to the current working frequency band The capacitance value of the grounding capacitor.
  11. 根据权利要求10所述的装置，其中，The device according to claim 10, wherein
    所述电压控制子单元，还用于在检测单元检测到终端未通过USB接口进行数据交互时，控制输入给可变接地电容子单元的电压值，将所述可变接地电容子单元的接地电容调整为无效。The voltage control subunit is further configured to: when the detecting unit detects that the terminal does not perform data interaction through the USB interface, control a voltage value input to the variable grounding capacitor subunit, and ground the capacitor of the variable grounding capacitor subunit Adjusted to be invalid.
  12. 根据权利要求8或10所述的装置，其中，The apparatus according to claim 8 or 10, wherein
    所述电容控制接入单元，还用于将所述当前工作频段对应的接地电容 未接地的一端连通到终端的共模电感前端。The capacitor control access unit is further configured to: ground capacitor corresponding to the current working frequency band The ungrounded end is connected to the common mode inductor front end of the terminal.
  13. 一种计算机存储介质，所述计算机存储介质中存储有可执行指令，所述可执行指令用于执行权利要求1至6任一项所述的抑制通用串行总线USB接口信号干扰的方法。 A computer storage medium having stored therein executable instructions for performing the method of suppressing interference of a universal serial bus USB interface according to any one of claims 1 to 6.
PCT/CN2016/072304 2015-07-06 2016-01-27 Method and device for inhibiting signal interference to usb interface, and computer storage medium WO2017004983A1 (en)

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