CN111092665B

CN111092665B - Method for preventing AGPS sensitivity from deteriorating and electronic device

Info

Publication number: CN111092665B
Application number: CN201911303972.7A
Authority: CN
Inventors: 张生
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2021-08-03
Anticipated expiration: 2039-12-17
Also published as: WO2021120379A1; CN111092665A

Abstract

Embodiments of the present invention provide a method for preventing AGPS sensitivity from deteriorating and an electronic device. The method comprises the following steps: arranging a first shielding cover for the multi-mode multi-frequency power amplifier, wherein the first shielding cover is used for covering the multi-mode multi-frequency power amplifier; selecting a second shield, wherein the first shield and the second shield are included in the same electronic device, and the second shield is a ground-intact shield adjacent to the first shield; and electrically connecting the first shield can with the second shield can. Therefore, the influence of the multimode multi-frequency power amplifiers of B13 and B14 frequency bands operating in an LTE network standard on AGPS sensitivity degradation can be effectively reduced.

Description

Method for preventing AGPS sensitivity from deteriorating and electronic device

Technical Field

Embodiments of the present invention relate to the field of mobile communications, and more particularly, to a method and an electronic device for preventing sensitivity degradation (De-sense) of an Assisted Global Positioning System (AGPS).

Background

A common GPS system consists of GPS satellites and GPS receivers. Unlike the ordinary GPS system, AGPS is a technology that combines network base station information and GPS information to locate a mobile station, and is currently widely used in GSM/GPRS, WCDMA, and CDMA2000 networks. AGPS is a positioning system that receives a positioning signal from a GPS satellite and, at the same time, positions a mobile station in accordance with positioning information of a GSM or CDMA network station of a mobile operator. That is, when AGPS positioning is enabled, the mobile station acquires positioning information from a GPS satellite through a GPS receiver, and also performs positioning of the mobile station by combining the two information by accessing a base station or a network server and downloading positioning information for assisting positioning through the mobile station.

Therefore, AGPS combines traditional satellite positioning and the assistance of mobile communication network sides such as GSM, GPRS, CDMA and the like, obtains auxiliary satellite information by utilizing the base station, can shorten the delay time of a GPS chip for obtaining satellite signals, can make up the defect of weak GPS signals by means of base station wireless communication signals even in a covered room, and lightens the dependence of the GPS chip on satellites.

In the current real network, using an LTE base station has become a mainstream method of AGPS assisted positioning. LTE communication standards in some countries and regions (e.g., north and latin america) have a demand for LTE B13 and/or B14 bands, with some countries and regions even having B13 and B14 as mandatory bands. However, the second harmonics of certain channels of the LTE B13 and/or B14 bands fall well within the GPS band, which can cause interference to the GPS receiver of the mobile station. If the interference signal is too strong, the GPS receiver cannot identify and distinguish the useful signal and the interference signal, so that ephemeris positioning information cannot be demodulated correctly; thus, AGPS faces the problem of poor positioning reliability and even positioning failure in the LTE communication system.

The statements in the background section are merely prior art as they are known to the inventors and do not, of course, represent prior art in the field.

Disclosure of Invention

In view of the above, an object of the embodiments of the present invention is to solve one or more of the foregoing problems, and provide a solution capable of solving AGPS sensitivity degradation (AGPS De-sense) in an LTE network system.

In one aspect, an embodiment of the present invention provides a method for preventing AGPS sensitivity from being deteriorated, including: arranging a first shielding cover for the multi-mode multi-frequency power amplifier, wherein the first shielding cover is used for covering the multi-mode multi-frequency power amplifier; selecting a second shield, wherein the first shield and the second shield are included in the same electronic device, and the second shield is a ground-intact shield adjacent to the first shield; and electrically connecting the first shield can with the second shield can. AGPS sensitivity degradation is caused by the multi-mode multi-band power amplifier included in the electronic device, which is capable of operating in an LTE network format and has demands for B13 and B14 bands.

In one embodiment, the second shield is a ground-intact shield spatially closest to the first shield.

In one embodiment, electrically connecting the first shield can with the second shield can further comprise: and electrically connecting the first shielding cover with the second shielding cover through conductive cloth.

In one embodiment, the second shielding can is a shielding can for encasing the radio frequency transmission module, the power management unit or the central processing unit, or a metal bezel of the electronic device.

In another aspect, embodiments of the present invention provide an electronic device, including: the multi-mode multi-frequency power amplifier is used for being capable of working under an LTE network system and has requirements on B13 frequency bands and B14 frequency bands; a GPS receiver; and a first shield cover for covering the multi-mode multi-frequency power amplifier, wherein the first shield cover is electrically connected to a second shield cover included in the electronic device, and the second shield cover is a shield cover which is spatially adjacent to the first shield cover and is completely grounded, thereby preventing AGPS sensitivity degradation of the GPS receiver caused by the multi-mode multi-frequency power amplifier.

In one embodiment the second shield is a ground complete shield spatially closest to said first shield.

In one embodiment, the first shield is connected to the second shield by a conductive cloth.

In one embodiment, the second shielding case is a shielding case for covering the radio frequency transmission module, the power management unit or the central processing unit, or a metal middle frame of the electronic device.

In one embodiment, the first shield and the second shield may be located on the same circuit board.

In one embodiment, the electronic device may be one of: mobile phone, panel, notebook computer, intelligent wearing equipment.

According to the embodiment of the invention, the first shield cover of the multi-mode multi-frequency power amplifier capable of working in the LTE B13/14 frequency band is electrically connected to the second shield cover which is adjacent to the space and is completely grounded in the electronic equipment, so that the grounding effect of the first shield cover is enhanced, and the interference of the B13/14 frequency band on the positioning of AGPS is effectively avoided.

Drawings

To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the respective embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art from the drawings in the following detailed description of the present disclosure without creative efforts.

FIG. 1 schematically illustrates a flow chart of a method for preventing AGPS sensitivity degradation according to one embodiment of the present disclosure;

FIG. 2A schematically shows a carrier to noise ratio diagram illustrating that a method according to an embodiment of the invention is not employed;

fig. 2B schematically shows a carrier to noise ratio diagram illustrating the use of a method according to an embodiment of the invention;

FIG. 3 schematically illustrates a structural diagram of an electronic device for preventing sensitivity degradation of AGPS according to an embodiment of the present disclosure; and

fig. 4 shows a schematic configuration diagram of a mobile communication terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and obviously, the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present disclosure. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the present disclosure, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described in this disclosure as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the disclosure. In the following description, the present disclosure sets forth details for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present disclosure may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present disclosure with unnecessary detail. Thus, the present disclosure is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

At present, there are two main solutions for the problem of poor positioning reliability and even positioning failure faced by AGPS in LTE communication system.

The first solution is to optimize the GPS chip, for example, to optimize the demodulation algorithm of the GPS, such as developing and distributing a software package for optimization.

The second solution is to consider from the LTE rf transceiver module, and handset equipment manufacturers require the rf transceiver module suppliers to design the modules according to their released specifications. The rf transceiver module may include, for example, a multi-mode multi-band Power Amplifier (PA), a duplexer, a radio frequency transmit module (TXM), a Low Noise Amplifier (LNA), a modulator, a demodulator, an up-converter, a down-converter, a synthesizer, a switch module, etc., as is well known in the art. Conventional requirements for handset device manufacturers include, for example:

(1) a low-pass filter is added on an LTE B13/B14 path, so that the second harmonic in the frequency band can be suppressed by at least 25dB out of band;

(2) using a duplexer with high out-of-band rejection, such as at least 45dB rejection;

(3) the power amplifier of the LTE B13/B14 frequency band has the capability of outputting second harmonic waves smaller than-13 dBm;

(4) the second harmonic rejection level of the switch module is at least-85 dBm;

(5) isolating the GPS receiver from the main antenna by at least 15 dB;

(6) a band-stop filter for the B13/14 frequency band is added to the path of the GPS receiver, and is at least 25 dB.

However, the above hardware design specification can only ensure that the interference level of the second harmonic conducted in the B13/14 frequency band meets the design requirement, but the coexistence interference of the GPS communication and the LTE communication is mutually affected by a coupling manner, so that even if the radio frequency front end completely refers to the design specification requirement of the platform, the LTE communication cannot be ensured not to interfere with the GPS communication. Because the interference source is not only in the form of conduction but also in the form of radiation, for example, the power amplifier body outputting the LTE signal is the radiation source, a part of the interference of the second harmonic in the B13/14 frequency band is transmitted to the antenna in the form of conduction, but a part of the interference level is radiated in the vicinity of the power amplifier body. This portion of the radiated electromagnetic waves may interfere with the operation of a GPS receiver in the same electronic device, such as a mobile communication terminal or a circuit board.

In general, PA devices for B13/14 band in electronic equipment are housed in a separate shield, but in order to reduce the differential loss of the transmission line, part of the transmission line of PA is routed through the surface of the shield or passes through the shield, and the grounding of the shield is incomplete. In this case, the ground impedance of the shield case is large, so that the backflow impedance is also large, and the shielding effect is not good. That is, the B13/14 band cannot be effectively prevented from causing signal interference to GPS communication.

Therefore, according to an embodiment of the present invention, there is provided a method for preventing sensitivity degradation of AGPS and an electronic device, in which a grounding effect of a first shield can is enhanced by electrically connecting the first shield can for a multi-mode multi-band power amplifier capable of operating in a B13/14 band to a spatially adjacent ground-complete second shield can in the electronic device.

Preferred embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, respectively. It should be understood that the preferred embodiments described herein are merely illustrative and explanatory of the embodiments of the invention, and are not restrictive thereof.

In a first aspect, embodiments of the present invention provide a method for preventing AGPS sensitivity degradation.

Referring to fig. 1, fig. 1 schematically illustrates a flowchart of a method 100 for preventing AGPS sensitivity degradation according to an embodiment of the present invention. The method 100 for preventing AGPS sensitivity degradation may include the steps of:

in step S110, a first shielding cover is disposed for the multi-mode multi-band power amplifier, and the first shielding cover is used for covering the multi-mode multi-band power amplifier.

In step S120, a second shield can is selected, wherein the first shield can and the second shield can are comprised in the same electronic device and the second shield can is a ground-complete shield can adjacent to the first shield can.

In step S130, the first shield can is electrically connected to the second shield can.

In the method 100, AGPS sensitivity degradation may be caused by a multi-mode multi-band power amplifier included in the electronic device, the multi-mode multi-band power amplifier being capable of operating in an LTE network standard and having requirements for B13 and B14 bands.

According to the embodiment of the invention, the shielding cover of the multi-mode multi-frequency power amplifier is electrically connected to the shielding cover which is adjacent to other grounding complete shielding covers, so that the grounding impedance of the shielding cover of the multi-mode multi-frequency power amplifier is reduced, and the backflow impedance is reduced. When the backflow impedance is minimum and the grounding effect is best, the isolation degree of the shielding case is increased, for example, the capability of the multimode multi-frequency power amplifier body outputting the LTE signal radiating to the outside is weakened, and therefore the electromagnetic interference on components such as a GPS antenna and the like which are adjacently arranged is reduced.

In a particular embodiment, a second shield of the electronic device is selected to be integral with the ground closest in spatial distance to a first shield for a multi-mode multi-frequency power amplifier to enhance the grounding effect of the first shield.

In a specific embodiment, a multi-mode multi-band power amplifier, for example, a power amplifier body outputting LTE signals, may be disposed on a side of the electronic device near a backplane of a display (e.g., LCD), and in this case, a shielding case of the multi-mode multi-band power amplifier may be electrically connected to the shielding case and/or a ground plane of the backplane of the display.

In a specific embodiment, in the design of the electronic device, the body of the multi-mode multi-frequency power amplifier outputting the LTE signal has to be disposed on the side facing the rear cover of the electronic device, and in this case, since the rear cover is usually made of plastic or resin and has no complete grounding area, the first shielding cover of the multi-mode multi-frequency power amplifier and the second shielding cover for grounding complete of another electronic device in the electronic device, which is closest to the first shielding cover in spatial distance, can be electrically connected.

According to the embodiment of the invention, a metal-like front shell around the multi-mode multi-frequency power amplifier is foundTo finish Soil preparationIf the nearby shield for other components is not basically used as a reference due to the extra number of traces on the surface layer, because the first shield of the multi-mode multi-frequency power amplifier is electrically connected to the shield by using the shield, the ground impedance of the shield of the multi-mode multi-frequency power amplifier is not too small, and therefore a complete ground shield must be found. In a specific embodiment, the second shielding case for electrically connecting with the first shielding case for the multi-mode multi-frequency power amplifier and enhancing the grounding effect thereof may be, for example, a metal middle frame, a metal front shell of an electronic device, or a shielding case for covering a radio frequency transmission module, a power management unit, or a central processing unit in the electronic device.

In a particular embodiment, electrically connecting the first shield can with the second shield can include: and electrically connecting the first shielding cover with the second shielding cover through conductive cloth. The conductive cloth material is prepared by chemically depositing or physically transferring a metal material (such as nickel) onto polyester fibers, plating a second metal layer (such as a copper layer) with high conductivity on the metal material layer, and plating nickel metal for preventing oxidation and corrosion on the second metal layer, wherein the combination of copper and nickel provides excellent conductivity and good electromagnetic shielding effect. It is to be understood that it is also contemplated that other conductive materials may be used to electrically connect the first shield to the second shield.

In one embodiment, if there are a plurality of adjacent second shield covers with complete grounding around the first shield cover for the multi-mode multi-frequency power amplifier, the best second shield cover can be found through the test of the shielding effect by connecting the first shield cover to the second shield covers respectively.

Referring to fig. 2A and 2B, fig. 2A is a carrier-to-noise ratio diagram schematically illustrating the effect of LTE B13 frequency band communication on a GPS receiver in an electronic device before the method of an embodiment of the present invention is employed; fig. 2B is a carrier-to-noise ratio diagram schematically illustrating an effect of communication in LTE B13 frequency band on a GPS receiver in the electronic device after the method for preventing AGPS sensitivity degradation according to the embodiment of the present invention is adopted for the test scenario illustrated in fig. 2A.

Referring to the carrier to noise ratio graphs shown in fig. 2A and 2B, where the abscissa represents time and the ordinate represents carrier to noise ratio in dB-Hz. As can be seen from fig. 2A, before the interference of the LTE B13 frequency band is added, the carrier-to-noise ratio of the GPS receiver is about 40dB/Hz, but after the interference is added, the carrier-to-noise ratio drops sharply, and the sensitivity is degraded by more than 20dB, which may seriously affect the positioning accuracy of the LTE B13 AGPS. Referring to the carrier to noise ratio graph shown in fig. 2B, it can be seen that in the case of testing the first shield for the multi-mode multi-band power amplifier electrically connected to the shield of the nearest fully grounded radio frequency transmit module (TXM), the AGPS sensitivity degradation of the GPS receiver can be improved by more than 15dB after the LTE B13 band interference is added. For the us Verizon or TF operator using the LTE B13 band as the mandatory band, it is sufficient that the free-space TIS can reach-149.5 dBm. It can be seen that the method of the embodiments of the present invention brings about a significant improvement in the carrier-to-noise ratio, and the above scheme can basically meet the basic requirements of operators.

For the LTE B14 band, the principle is similar to B13, if a PA stack is placed close to the battery back cover, then the area for which the return path is the shortest is sought according to an embodiment of the present invention. Considering the case where the second harmonic of the B14 band is entirely within the GPS band, and the interference level is likely to be greater than that of the B13 band, the transmit power of the band of 2-3dB can be reduced appropriately based on the above scheme for the B13 band to better meet the operator's requirements completely.

In a second aspect, embodiments of the present invention provide an electronic device for preventing AGPS sensitivity degradation.

Referring to fig. 3, fig. 3 schematically illustrates a block diagram of an electronic device 300 for preventing AGPS sensitivity degradation according to an embodiment of the present invention. The electronic device 300 comprises at least:

the multimode multi-frequency power amplifier 310 is used for operating in an LTE network system and has requirements on frequency bands of B13 and B14;

a GPS receiver 320; and

a first shield cover 330 for covering the multi-mode multi-band power amplifier, wherein the first shield cover is electrically connected to a second shield cover included in the electronic device, and the second shield cover is a shield cover which is spatially adjacent to the first shield cover and is completely grounded, thereby preventing AGPS sensitivity degradation of the GPS receiver caused by the multi-mode multi-band power amplifier.

Electronic devices according to aspects of the present invention may be mobile wireless communication terminals, for example, including but not limited to: mobile phone, panel, notebook computer, intelligent wearing equipment. It should be understood that the electronic device 300 may also include, for example, a duplexer 350, a radio frequency transmit module (TXM)360, and a second shield 370 for the radio frequency transmit module.

In a specific embodiment the second shield is a ground complete shield in closest spatial proximity to said first shield, which may for example be a second shield 370 for a radio frequency transmission module.

In a particular embodiment, the first shield is connected to the second shield by a conductive cloth.

In a specific embodiment, the second shielding case is a shielding case for covering a power management unit or a central processing unit, or a metal middle frame of the electronic device.

In a particular embodiment, the first shield and the second shield are located on the same circuit board.

Fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the invention. Taking a mobile phone (such as a mobile phone) as an example, a partial block diagram of the structure is shown in fig. 4.

The handset includes portions of radio frequency circuitry 410, memory 420, input unit 430, display unit 440, sensor 450, audio circuitry 460, wireless module 470, processor 480, power supply 490, and GPS receiver 510. Those skilled in the art will appreciate that the handset configuration shown in fig. 4 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The RF circuit 410 is used for receiving and transmitting electromagnetic waves, and implementing interconversion between the electromagnetic waves and electrical signals, thereby communicating with a communication network or other devices. RF circuitry 410 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and so forth. The RF circuit 410 may integrate the multi-mode multi-band power amplifier 310, the first shield can 320, the duplexer 350, the radio frequency transmission module 360, and the second shield can 370, which are illustrated in fig. 3. The RF circuit 410 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices over a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. The Wireless network may use various Communication standards, protocols and technologies, including but not limited to Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), LTE Mobile Communication technology (Long Term Evolution, LTE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wireless Fidelity, Wi-Fi) (e.g., IEEE802.11 a, IEEE802.11 b, IEEE802.11g and/or IEEE802.11 n), Voice over Internet Protocol (VoIP), and Microwave Access (Microwave Access for world wide web), Wi-Max for short), other protocols for email, instant messaging, and short messaging, and any other suitable communication protocol, and may even include those that have not yet been developed.

The memory 420 may be used to store software programs and modules, and the processor 480 executes various functional applications and data processing by operating the software programs and modules stored in the memory 420. The memory 420 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 420 may further include memory located remotely from the processor 480, which may be connected to the mobile terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input unit 430 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 430 may include a touch-sensitive surface 431 as well as other input devices 432. The touch-sensitive surface 431, also referred to as a touch display screen or a touch pad, may collect touch operations by a user on or near the touch-sensitive surface 431 (e.g., operations by a user on or near the touch-sensitive surface 431 using any suitable object or attachment such as a finger, a stylus, etc.) and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface 431 may comprise both a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 480, and receives and executes commands sent from the processor 480. In addition, the touch-sensitive surface 431 may be implemented in various types, such as resistive, capacitive, infrared, and surface acoustic wave. The input unit 430 may include other input devices 432 in addition to the touch-sensitive surface 431. In particular, other input devices 432 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 440 may be used to display information input by or provided to a user and various graphic user interfaces of the mobile terminal, which may be configured by graphics, text, icons, video, and any combination thereof. The Display unit 440 may include a Display panel 441, and optionally, the Display panel 441 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface 431 may overlay the display panel 441, and when a touch operation is detected on or near the touch-sensitive surface 431, the touch operation is transmitted to the processor 480 to determine the type of touch event, and then the processor 480 provides a corresponding visual output on the display panel 441 according to the type of touch event. Although in FIG. 4 the touch sensitive surface 431 and the display panel 441 are two separate components to implement input and output functions, in some embodiments the touch sensitive surface 431 and the display panel 441 may be integrated to implement input and output functions.

The mobile terminal may also include at least one sensor 450, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 441 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 441 and/or a backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile terminal, further description is omitted here.

The audio circuit 460, speaker 461, microphone 462 may provide an audio interface between the user and the mobile terminal. The audio circuit 460 may transmit the electrical signal converted from the received audio data to the speaker 461, and convert the electrical signal into a sound signal for output by the speaker 461; on the other hand, the microphone 462 converts the collected sound signal into an electric signal, which is received by the audio circuit 460 and converted into audio data, which is then processed by the audio data output processor 480, and then transmitted to, for example, another terminal via the RF circuit 410, or output to the memory 420 for further processing. The audio circuit 460 may also include an earbud jack to provide communication of a peripheral headset with the mobile terminal.

The mobile terminal may assist the user in e-mail, web browsing, streaming media access, etc. through the transmission module 470 (e.g., Wi-Fi module), which provides the user with wireless broadband internet access. Although fig. 4 shows the transmission module 470, it is understood that it does not belong to the essential constitution of the mobile terminal and can be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 480 is a control center of the mobile terminal, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 420 and calling data stored in the memory 420, thereby integrally monitoring the mobile phone. Alternatively, processor 440 may include one or more processing cores; in some embodiments, processor 480 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 480.

The mobile terminal also includes a power supply 490 (e.g., a battery) for powering the various components, which may be logically coupled to the processor 480 via a power management system that may be configured to manage charging, discharging, and power consumption, in some embodiments. The power supply 490 may also include one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and any like components.

The GPS receiver 510 is a component that receives global positioning system satellite signals and determines the ground spatial location. By receiving the navigation positioning signal sent by the GPS satellite, the electronic device can perform assisted global positioning AGPS.

Although not shown, the mobile terminal may further include a camera (e.g., a front camera, a rear camera), a bluetooth module, and the like, which are not described in detail herein. Specifically, in this embodiment, the display unit of the mobile terminal is a touch screen display, and the mobile terminal further includes a memory.

It should be noted that although in the above detailed description several means or modules of the electronic device are mentioned, this division is only not mandatory. Indeed, the features and functionality of two or more of the modules described above may be embodied in one module according to embodiments of the invention. Conversely, the features and functions of one module described above may be further divided into embodiments by a plurality of modules.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and simple improvements made in the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A method for preventing AGPS sensitivity degradation, comprising:

arranging a first shielding cover for the multi-mode multi-frequency power amplifier, wherein the first shielding cover is used for covering the multi-mode multi-frequency power amplifier, and a transmission line of the multi-mode multi-frequency power amplifier passes through the surface layer of the first shielding cover or passes through the first shielding cover;

selecting a second shield, wherein the first shield and the second shield are included in the same electronic device, and the second shield is a ground-intact shield adjacent to the first shield; and

electrically connecting the first shield cover and the second shield cover to reduce a ground impedance of the first shield cover of the multi-mode multi-frequency power amplifier and to reduce a backflow impedance;

wherein the AGPS sensitivity degradation is caused by the multi-mode multi-band power amplifier included in the electronic device, the multi-mode multi-band power amplifier being capable of operating in an LTE network system and having requirements for B13 and B14 bands.

2. The method of claim 1, wherein the second shield is a ground-intact shield spatially closest to the first shield.

3. The method of claim 1, wherein electrically connecting the first shield with the second shield comprises: and electrically connecting the first shielding cover with the second shielding cover through conductive cloth.

4. The method according to any of claims 1-3, wherein the second shielding cage is a shielding cage for encasing a radio frequency transmission module, a power management unit, or a central processing unit, or a metal bezel of an electronic device.

5. An electronic device, comprising:

the multi-mode multi-frequency power amplifier is used for being capable of working under an LTE network system and has requirements on B13 frequency bands and B14 frequency bands;

a GPS receiver; and

a first shield cover for covering the multi-mode multi-frequency power amplifier, wherein a transmission line of the multi-mode multi-frequency power amplifier passes through a surface layer of the first shield cover or passes through the first shield cover, wherein the first shield cover is electrically connected with a second shield cover included in the electronic device to reduce a ground impedance of the first shield cover of the multi-mode multi-frequency power amplifier and a return impedance, and the second shield cover is a shield cover which is spatially adjacent to the first shield cover and is completely grounded, thereby preventing AGPS sensitivity of the GPS receiver from being deteriorated due to the multi-mode multi-frequency power amplifier.

6. The electronic device of claim 5, wherein the second shield is a ground-intact shield spatially closest to the first shield.

7. The electronic device of claim 5, wherein the first shield is connected to the second shield by a conductive cloth.

8. The electronic device according to any of claims 5-7, wherein the second shielding case is a shielding case for covering a radio frequency transmission module, a power management unit, or a central processing unit, or a metal bezel of the electronic device.

9. The electronic device of any of claims 5-7, wherein the first and second shields are located on a same circuit board.

10. The electronic device of any of claims 5-7, wherein the electronic device is one of: mobile phone, panel, notebook computer, intelligent wearing equipment.