CN105721002B

CN105721002B - A kind of terminal filtering method, system, device and terminal can be filtered

Info

Publication number: CN105721002B
Application number: CN201610239447.3A
Authority: CN
Inventors: 王翔
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2016-04-15
Filing date: 2016-04-15
Publication date: 2019-03-01
Anticipated expiration: 2036-04-15
Also published as: CN105721002A

Abstract

The invention discloses a kind of terminal filtering method, system, device and can filter terminal include: this method comprises: terminal establish communicate when, obtain the emitted signal of terminal frequency.The harmonic wave of transmitting signal is calculated according to the frequency of acquisition.Judge whether the harmonic wave falls in the frequency range of global position system GPS signal.When the harmonic wave is fallen in the frequency range of GPS signal, transmitting signal is filtered, the harmonic wave fallen in GPS signal frequency range is filtered out.Scheme through the invention can will affect the noise target signal filter of GPS, prevent noise feed antenna and radiate, and reduce the design requirement to antenna, reduce design cost.

Description

Terminal filtering method, system and device and filtering terminal

Technical Field

The present invention relates to the field of filtering, and in particular, to a terminal filtering method, system, device, and terminal capable of filtering.

Background

At present, more and more frequency bands are supported by the terminal, and therefore, the problem of dual-purpose electromagnetism between the GPS function in the terminal and the communication and data services of the terminal is increasingly highlighted. The most common network communication form at present is LTE Band13, that is, 4G network communication, which is especially serious in interference with GPS positioning, and users often affect the positioning of terminals by using 4G to surf the internet. In addition, in order to solve the problem of electromagnetic interference of the terminal, the current solutions are all studied on antenna design, and it is desired to achieve the purpose of reducing electromagnetic interference by improving the EMC compatibility of the antenna, but this undoubtedly increases the difficulty of antenna design and also increases the actual cost. Therefore, how to guarantee the electromagnetic compatibility between the terminal communication and the GPS function to the maximum extent, reduce the electromagnetic interference caused by the communication to the GPS, and at the same time, reduce the design difficulty of the antenna and the design cost of the terminal is a problem that needs to be solved urgently by current designers.

Disclosure of Invention

The invention mainly aims to provide a terminal filtering method, a system and a device and a filtering terminal, which can filter noise signals influencing GPS, prevent noise from being fed into an antenna and radiated out, reduce the design requirement on the antenna and reduce the design cost.

In order to achieve the above object, the present invention provides a terminal filtering method, including:

when the terminal establishes communication, the frequency of a signal transmitted by the terminal is acquired.

And calculating the harmonic wave of the transmitting signal according to the acquired frequency.

It is determined whether the harmonic falls within a frequency band of a global positioning system GPS signal.

And when the harmonic wave falls in the frequency band of the GPS signal, filtering the transmitted signal to filter the harmonic wave falling in the frequency band of the GPS signal.

Optionally, the method further comprises:

sending a first command signal prior to filtering the transmit signal; the first command signal includes a command signal for closing a predetermined switch module.

And connecting a communication circuit front-end module of the terminal with a preset filtering module according to the first command signal.

And transmitting the transmitting signal after being filtered by the filtering module.

Optionally, the command signal for closing the switch module comprises: and command information for connecting the non-fixed end of the switch module with the connecting end of the filter module.

Optionally, the method further comprises:

and when the harmonic wave does not fall in the frequency band of the GPS signal, transmitting the transmission signal which is not filtered by the wave filtering module.

Optionally, the method further comprises:

before transmitting the transmitting signal which is not filtered by the filtering wave module, transmitting a second command signal to a preset switch module; the second command signal comprises a command signal to turn off the switch module.

And connecting the front-end module of the communication circuit of the terminal with a preset antenna switch according to the second command signal.

And transmitting the transmitting signal to an antenna through an antenna switch for transmitting.

Optionally, the command signal for opening the switch module comprises: and command information for disconnecting the non-fixed end of the switch module from the connecting end of the filter module and connecting the non-fixed end of the switch module with the connecting end of the antenna switch.

In order to achieve the above object, the present invention further provides a terminal filtering system, including: the device comprises a processing module and a filtering module;

the processing module is used for:

when a terminal establishes communication, acquiring the frequency of a signal transmitted by the terminal;

calculating the harmonic wave of the transmitting signal according to the acquired frequency;

The filtering module is used for: and when the harmonic wave falls in the frequency band of the GPS signal, filtering the transmitted signal to filter the harmonic wave falling in the frequency band of the GPS signal.

Optionally, the system further comprises: communication circuit front end module, switch module and antenna.

The communication circuit front end module is used for: a transmit signal is generated.

The processing module is further configured to: sending a first command signal prior to filtering the transmit signal; the first command signal includes a command signal for closing a predetermined switch module.

The switch module is used for: and connecting a communication circuit front-end module of the terminal with a preset filtering module according to the first command signal.

The antenna is used for: and transmitting the transmitting signal after being filtered by the filtering module.

Optionally, the switch module is a single pole double throw switch.

The single-pole double-throw switch comprises a control end, a movable end and a fixed end; the movable end comprises a fixed end and a non-fixed end; the stationary end includes a first end, a second end, and a third end.

Wherein, the control end is connected with the movable end; the fixed end is fixed on the first end.

Optionally, the system further comprises an antenna switch.

The processing module is respectively connected with the control end of the front-end module of the communication circuit and the control end of the switch module.

The output end of the communication circuit front-end module is connected with the first end of the switch module.

The input end of the filtering module is connected with the second end.

The output end of the filtering module is connected with the input end of the antenna switch.

And the third end is connected with the input end of the antenna switch.

Optionally, the command signal for closing the switch module comprises: command information for connecting the non-fixed end of the switch module with the second end.

Alternatively,

the antenna is also for: and when the harmonic wave does not fall in the frequency band of the GPS signal, transmitting the transmission signal which is not filtered by the wave filtering module.

Optionally, the system further comprises: an antenna switch.

The processing module is further configured to: before transmitting the transmission signal which is not filtered by the filtering wave module, sending a second command signal to the switch module; the second command signal comprises a command signal to turn off the switch module.

The switch module is further configured to: and connecting the communication circuit front-end module of the terminal with the antenna switch according to the second command signal.

The antenna switch is used for: and transmitting the transmitting signal to an antenna for transmitting.

Optionally, the command signal for opening the switch module comprises: and command information for disconnecting the non-fixed end of the switch module from the second end and connecting the non-fixed end of the switch module with the third end.

In order to achieve the above object, the present invention further provides a terminal filtering apparatus, including: a central processing unit CPU and a GPS filter.

The CPU is used for:

it is determined whether the harmonics fall within the frequency band of the GPS signal.

The GPS filter is used for: and when the harmonic wave falls in the frequency band of the GPS signal, filtering the transmitted signal to filter the harmonic wave falling in the frequency band of the GPS signal.

Optionally, the apparatus further comprises: an intelligent switch.

The CPU is further configured to: sending a first command signal prior to filtering the transmit signal; the first command signal comprises a command signal to close the smart switch.

The intelligent switch is used for: the communication circuit front end module of the terminal is connected with the GPS filter according to the first command signal.

Optionally, the smart switch is a single pole double throw switch.

Alternatively,

the CPU is respectively connected with the control end of the front-end module of the communication circuit and the control end of the intelligent switch.

The output end of the communication circuit front-end module is connected with the first end of the intelligent switch.

The input end of the GPS filter is connected with the second end.

The output end of the GPS filter is connected with the input end of the preset antenna switch.

The third end is connected with the input end of the antenna switch.

Optionally, the command signal for closing the intelligent switch comprises: and command information for connecting the non-fixed end of the intelligent switch with the second end.

Alternatively,

the CPU is further configured to: when the harmonic wave does not fall in the frequency band of the GPS signal, a second command signal is sent to the intelligent switch before the transmitting signal which is not filtered by the GPS filter is transmitted out through the antenna; the second command signal comprises a command signal to turn off the smart switch.

The intelligence switch still is used for: and connecting the communication circuit front-end module of the terminal with the antenna switch according to the second command signal.

Optionally, the command signal for turning off the smart switch comprises: and command information for disconnecting the non-fixed end of the intelligent switch from the second end and connecting the non-fixed end of the intelligent switch with the third end.

In order to achieve the above object, the present invention further provides a terminal capable of filtering, where the terminal includes the above terminal filtering apparatus.

The invention provides a terminal filtering method, a system and a device and a filtering terminal, comprising: the method comprises the following steps: when the terminal establishes communication, the frequency of a signal transmitted by the terminal is acquired. And calculating the harmonic wave of the transmitting signal according to the acquired frequency. It is determined whether the harmonic falls within a frequency band of a global positioning system GPS signal. And when the harmonic wave falls in the frequency band of the GPS signal, filtering the transmitted signal to filter the harmonic wave falling in the frequency band of the GPS signal. . By the scheme of the invention, noise signals influencing the GPS can be filtered, noise is prevented from being fed into the antenna and radiated out, the design requirement on the antenna is reduced, and the design cost is reduced.

Drawings

Fig. 1 is a schematic diagram of a hardware structure of an alternative mobile terminal for implementing various embodiments of the present invention;

FIG. 2 is a diagram of a wireless communication system for the mobile terminal shown in FIG. 1;

FIG. 3 is a flow chart of a terminal filtering method of the present invention;

FIG. 4 is a block diagram of the terminal filtering system of the present invention;

fig. 5 is a schematic structural diagram of a wireless communication module of a terminal according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an intelligent switch according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a connection structure of a front-end module of a conventional terminal communication circuit and a GPS front-end module;

FIG. 8 is a schematic diagram of a terminal filter structure according to the present invention;

fig. 9 is a block diagram of the terminal filtering apparatus according to the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

An alternative mobile terminal for implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.

The mobile terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, and the like, and a stationary terminal such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.

Fig. 1 is a schematic hardware configuration of a mobile terminal implementing various embodiments of the present invention.

The mobile terminal 100 may include a wireless communication unit 110, an a/V (audio/video) input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, an interface unit 170, a controller 180, and a power supply unit 190, etc. Fig. 1 illustrates a mobile terminal having various components, but it is to be understood that not all illustrated components are required to be implemented. More or fewer components may alternatively be implemented. Elements of the mobile terminal will be described in detail below.

The wireless communication unit 110 typically includes one or more components that allow radio communication between the mobile terminal 100 and a wireless communication system or network. For example, the wireless communication unit may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless internet module 113, a short-range communication module 114, and a location information module 115.

The broadcast receiving module 111 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel. The broadcast channel may comprise a satellite channelAnd/or terrestrial channels. The broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast associated information or a server that receives a previously generated broadcast signal and/or broadcast associated information and transmits it to a terminal. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. Also, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. The broadcast associated information may also be provided via a mobile communication network, and in this case, the broadcast associated information may be received by the mobile communication module 112. The broadcast signal may exist in various forms, for example, it may exist in the form of an Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB), an Electronic Service Guide (ESG) of digital video broadcasting-handheld (DVB-H), and the like. The broadcast receiving module 111 may receive a signal broadcast by using various types of broadcasting systems. In particular, the broadcast receiving module 111 may receive a broadcast signal by using a signal such as multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcasting-handheld (DVB-H), forward link media (MediaFLO)^@) A digital broadcasting system of a terrestrial digital broadcasting integrated service (ISDB-T), etc. receives digital broadcasting. The broadcast receiving module 111 may be constructed to be suitable for various broadcasting systems that provide broadcast signals as well as the above-mentioned digital broadcasting systems. The broadcast signal and/or broadcast associated information received via the broadcast receiving module 111 may be stored in the memory 160 (or other type of storage medium).

The mobile communication module 112 transmits and/or receives radio signals to and/or from at least one of a base station (e.g., access point, node B, etc.), an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted and/or received according to text and/or multimedia messages.

The wireless internet module 113 supports wireless internet access of the mobile terminal. The module may be internally or externally coupled to the terminal. The wireless internet access technology to which the module relates may include WLAN (wireless LAN) (Wi-Fi), Wibro (wireless broadband), Wimax (worldwide interoperability for microwave access), HSDPA (high speed downlink packet access), and the like.

The short-range communication module 114 is a module for supporting short-range communication. Some examples of short-range communication technologies include bluetooth^TMRadio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), zigbee^TMAnd so on.

The location information module 115 is a module for checking or acquiring location information of the mobile terminal. A typical example of the location information module is a GPS (global positioning system). According to the current technology, the GPS module 115 calculates distance information and accurate time information from three or more satellites and applies triangulation to the calculated information, thereby accurately calculating three-dimensional current location information according to longitude, latitude, and altitude. Currently, a method for calculating position and time information uses three satellites and corrects an error of the calculated position and time information by using another satellite. In addition, the GPS module 115 can calculate speed information by continuously calculating current position information in real time.

The a/V input unit 120 is used to receive an audio or video signal. The a/V input unit 120 may include a camera 121 and a microphone 1220, and the camera 121 processes image data of still pictures or video obtained by an image capturing apparatus in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 151. The image frames processed by the camera 121 may be stored in the memory 160 (or other storage medium) or transmitted via the wireless communication unit 110, and two or more cameras 1210 may be provided according to the construction of the mobile terminal. The microphone 122 may receive sounds (audio data) via the microphone in a phone call mode, a recording mode, a voice recognition mode, or the like, and can process such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the mobile communication module 112 in case of a phone call mode. The microphone 122 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The user input unit 130 may generate key input data according to a command input by a user to control various operations of the mobile terminal. The user input unit 130 allows a user to input various types of information, and may include a keyboard, dome sheet, touch pad (e.g., a touch-sensitive member that detects changes in resistance, pressure, capacitance, and the like due to being touched), scroll wheel, joystick, and the like. In particular, when the touch pad is superimposed on the display unit 151 in the form of a layer, a touch screen may be formed.

The sensing unit 140 detects a current state of the mobile terminal 100 (e.g., an open or closed state of the mobile terminal 100), a position of the mobile terminal 100, presence or absence of contact (i.e., touch input) by a user with the mobile terminal 100, an orientation of the mobile terminal 100, acceleration or deceleration movement and direction of the mobile terminal 100, and the like, and generates a command or signal for controlling an operation of the mobile terminal 100. For example, when the mobile terminal 100 is implemented as a slide-type mobile phone, the sensing unit 140 may sense whether the slide-type phone is opened or closed. In addition, the sensing unit 140 can detect whether the power supply unit 190 supplies power or whether the interface unit 170 is coupled with an external device. The sensing unit 140 may include a proximity sensor 1410 as will be described below in connection with a touch screen.

The interface unit 170 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The identification module may store various information for authenticating a user using the mobile terminal 100 and may include a User Identity Module (UIM), a Subscriber Identity Module (SIM), a Universal Subscriber Identity Module (USIM), and the like. In addition, a device having an identification module (hereinafter, referred to as an "identification device") may take the form of a smart card, and thus, the identification device may be connected with the mobile terminal 100 via a port or other connection means. The interface unit 170 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal and the external device.

In addition, when the mobile terminal 100 is connected with an external cradle, the interface unit 170 may serve as a path through which power is supplied from the cradle to the mobile terminal 100 or may serve as a path through which various command signals input from the cradle are transmitted to the mobile terminal. Various command signals or power input from the cradle may be used as signals for recognizing whether the mobile terminal is accurately mounted on the cradle. The output unit 150 is configured to provide output signals (e.g., audio signals, video signals, alarm signals, vibration signals, etc.) in a visual, audio, and/or tactile manner. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and the like.

The display unit 151 may display information processed in the mobile terminal 100. For example, when the mobile terminal 100 is in a phone call mode, the display unit 151 may display a User Interface (UI) or a Graphical User Interface (GUI) related to a call or other communication (e.g., text messaging, multimedia file downloading, etc.). When the mobile terminal 100 is in a video call mode or an image capturing mode, the display unit 151 may display a captured image and/or a received image, a UI or GUI showing a video or an image and related functions, and the like.

Meanwhile, when the display unit 151 and the touch pad are overlapped with each other in the form of a layer to form a touch screen, the display unit 151 may serve as an input device and an output device. The display unit 151 may include at least one of a Liquid Crystal Display (LCD), a thin film transistor LCD (TFT-LCD), an Organic Light Emitting Diode (OLED) display, a flexible display, a three-dimensional (3D) display, and the like. Some of these displays may be configured to be transparent to allow a user to view from the outside, which may be referred to as transparent displays, and a typical transparent display may be, for example, a TOLED (transparent organic light emitting diode) display or the like. Depending on the particular desired implementation, the mobile terminal 100 may include two or more display units (or other display devices), for example, the mobile terminal may include an external display unit (not shown) and an internal display unit (not shown). The touch screen may be used to detect a touch input pressure as well as a touch input position and a touch input area.

The audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 into an audio signal and output as sound when the mobile terminal is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output module 152 may provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output module 152 may include a speaker, a buzzer, and the like.

The alarm unit 153 may provide an output to notify the mobile terminal 100 of the occurrence of an event. Typical events may include call reception, message reception, key signal input, touch input, and the like. In addition to audio or video output, the alarm unit 153 may provide output in different ways to notify the occurrence of an event. For example, the alarm unit 153 may provide an output in the form of vibration, and when a call, a message, or some other incoming communication (incomingmunication) is received, the alarm unit 153 may provide a tactile output (i.e., vibration) to inform the user thereof. By providing such a tactile output, the user can recognize the occurrence of various events even when the user's mobile phone is in the user's pocket. The alarm unit 153 may also provide an output notifying the occurrence of an event via the display unit 151 or the audio output module 152.

The memory 160 may store software programs and the like for processing and controlling operations performed by the controller 180, or may temporarily store data (e.g., a phonebook, messages, still images, videos, and the like) that has been or will be output. Also, the memory 160 may store data regarding various ways of vibration and audio signals output when a touch is applied to the touch screen.

The memory 160 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. Also, the mobile terminal 100 may cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.

The controller 180 generally controls the overall operation of the mobile terminal. For example, the controller 180 performs control and processing related to voice calls, data communications, video calls, and the like. In addition, the controller 180 may include a multimedia module 1810 for reproducing (or playing back) multimedia data, and the multimedia module 1810 may be constructed within the controller 180 or may be constructed separately from the controller 180. The controller 180 may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image.

The power supply unit 190 receives external power or internal power and provides appropriate power required to operate various elements and components under the control of the controller 180.

The various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or any combination thereof. For a hardware implementation, the embodiments described herein may be implemented using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, an electronic unit designed to perform the functions described herein, and in some cases, such embodiments may be implemented in the controller 180. For a software implementation, the implementation such as a process or a function may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in the memory 160 and executed by the controller 180.

Up to this point, mobile terminals have been described in terms of their functionality. Hereinafter, a slide-type mobile terminal among various types of mobile terminals, such as a folder-type, bar-type, swing-type, slide-type mobile terminal, and the like, will be described as an example for the sake of brevity. Accordingly, the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.

The mobile terminal 100 as shown in fig. 1 may be configured to operate with communication systems such as wired and wireless communication systems and satellite-based communication systems that transmit data via frames or packets.

A communication system in which a mobile terminal according to the present invention is operable will now be described with reference to fig. 2.

Such communication systems may use different air interfaces and/or physical layers. For example, the air interface used by the communication system includes, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)), global system for mobile communications (GSM), and the like. By way of non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.

Referring to fig. 2, the CDMA wireless communication system may include a plurality of mobile terminals 100, a plurality of Base Stations (BSs) 270, Base Station Controllers (BSCs) 275, and a Mobile Switching Center (MSC) 280. The MSC280 is configured to interface with a Public Switched Telephone Network (PSTN) 290. The MSC280 is also configured to interface with a BSC275, which may be coupled to the base station 270 via a backhaul. The backhaul may be constructed according to any of several known interfaces including, for example, E1/T1, ATM, IP, PPP, frame Relay, HDSL, ADSL, or xDSL. It will be understood that a system as shown in fig. 2 may include multiple BSCs 2750.

Each BS270 may serve one or more sectors (or regions), each sector covered by a multi-directional antenna or an antenna pointing in a particular direction being radially distant from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS270 may be configured to support multiple frequency allocations, with each frequency allocation having a particular frequency spectrum (e.g., 1.25MHz,5MHz, etc.).

The intersection of partitions with frequency allocations may be referred to as a CDMA channel. The BS270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" may be used to generically refer to a single BSC275 and at least one BS 270. The base stations may also be referred to as "cells". Alternatively, each sector of a particular BS270 may be referred to as a plurality of cell sites.

As shown in fig. 2, a Broadcast Transmitter (BT)295 transmits a broadcast signal to the mobile terminal 100 operating within the system. A broadcast receiving module 111 as shown in fig. 1 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295. In fig. 2, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 assists in locating at least one of the plurality of mobile terminals 100.

In fig. 2, a plurality of satellites 300 are depicted, but it is understood that useful positioning information may be obtained with any number of satellites. The GPS module 115 as shown in fig. 1 is generally configured to cooperate with satellites 300 to obtain desired positioning information. Other techniques that can track the location of the mobile terminal may be used instead of or in addition to GPS tracking techniques. In addition, at least one GPS satellite 300 may selectively or additionally process satellite DMB transmission.

As a typical operation of the wireless communication system, the BS270 receives reverse link signals from various mobile terminals 100. The mobile terminal 100 is generally engaged in conversations, messaging, and other types of communications. Each reverse link signal received by a particular base station 270 is processed within the particular BS 270. The obtained data is forwarded to the associated BSC 275. The BSC provides call resource allocation and mobility management functions including coordination of soft handoff procedures between BSs 270. The BSCs 275 also route the received data to the MSC280, which provides additional routing services for interfacing with the PSTN 290. Similarly, the PSTN290 interfaces with the MSC280, the MSC interfaces with the BSCs 275, and the BSCs 275 accordingly control the BS270 to transmit forward link signals to the mobile terminal 100.

Based on the above optional mobile terminal hardware structure and communication system, various embodiments of the method of the present invention are proposed.

The invention aims to design a method for improving GPS performance, which is mainly designed on a transmitting link, namely a radio frequency link, of a terminal transmitting signal, and the design idea is as follows: when the terminal establishes communication, if the terminal is in a GPS navigation state, noise signals (namely harmonic waves) influencing a GPS are filtered, and the noise is prevented from being fed into the antenna and radiated out, so that the electromagnetic interference of the terminal transmitting signals is fundamentally reduced, and the electromagnetic compatibility (EMC) performance and the GPS performance of the terminal transmitting signals are improved. In addition, because the noise signal that influences GPS can not get into the antenna at all, consequently, relevant personnel just need not consider the coexistence problem of antenna and GPS signal when designing the antenna, this degree of difficulty that will greatly reduced antenna design, also will greatly reduced antenna and terminal's research and development cost simultaneously, promote the EMC level at whole terminal.

As shown in fig. 3, to achieve the above object, the present invention provides a terminal filtering method, including:

s101, when the terminal establishes communication, the frequency of a signal transmitted by the terminal is obtained.

In the embodiment of the present invention, as soon as the terminal starts to establish communication, where the communication includes, but is not limited to, 4G network communication, the terminal starts to detect a transmission signal of the terminal, specifically, a transmission signal of a front-end module of a communication circuit, where the frequency of the current transmission signal is detected, and further, it is required to detect a GPS signal of a currently applied GPS positioning system, and analyze a frequency band of the GPS signal from the currently obtained GPS signal. In the embodiment of the present invention, the specific detection method and the specific analysis device are not limited.

In addition, the positioning system in the solution of the present invention may also be any type of positioning system, and is not limited to a GPS positioning system. For example, a third party software such as a Baidu map, a Gade map, etc.

And S102, calculating the harmonic wave of the transmitted signal according to the acquired frequency.

In the embodiment of the present invention, after the frequency f0 of the transmission signal is detected, the harmonic f1 in the frequency f0 is further calculated. Here, too, no limitation is made to a specific calculation method, calculation device, or calculation software.

S103, judging whether the harmonic wave falls in the frequency band of the GPS signal.

In an embodiment of the invention, the calculated harmonic f1 is then compared to the known signal band for GPS, which is typically 1575.42MHz +/-1 MHz.

And S104, when the harmonic wave falls into the frequency band of the GPS signal, filtering the transmitted signal, and filtering the harmonic wave falling into the frequency band of the GPS signal.

In the embodiment of the invention, the scheme from the step S101 to the step S104 can fundamentally reduce the electromagnetic interference of the signal transmitted by the terminal, and improve the electromagnetic compatibility (EMC) performance and the GPS performance of the signal transmitted by the terminal.

Optionally, the method further comprises:

s201, before filtering the transmitting signal, sending a first command signal; the first command signal includes a command signal for closing a predetermined switch module.

In the embodiment of the invention, a preset switch module is added for purposefully filtering signals transmitted by a terminal, for example, for a GPS system in the terminal, only harmonics affecting the GPS function are filtered, specifically, only when the transmitted signals are detected to include the harmonics affecting the GPS positioning, the switch module is commanded to be closed, so that the front-end module of the communication circuit is connected with the filter module, thereby performing filtering operation on the harmonics affecting the GPS function in the transmitted signals, and for other harmonics included in the transmitted signals of the terminal, processing is not performed first, so as to avoid affecting other application functions in the terminal.

It should be noted that the solution of the present invention is not limited to be applied to only the GPS function, and the application solution of the present invention can be applied to other application functions as well.

In the embodiment of the present invention, the specific form of the switch module is not limited, and the switch module may be any form of switch or relay, and any switch module capable of implementing the scheme of the present invention is within the protection scope of the present invention. And there is no particular limitation on the number of switches or relays in the switch module.

Alternatively, the switch module may be only a single pole double throw switch, or a relay with single pole double throw functionality. Here, the switch or the relay adopting the single-pole double-throw principle can avoid the phenomenon that two ends needing to be disconnected are not disconnected after the two ends needing to be connected are connected, and further avoid the phenomenon that the subsequent schemes are disordered in operation.

The first command signal is mainly used for commanding the switch module to connect the communication circuit front-end module with the filtering module, so that when the harmonic contained in the transmitting signal of the communication circuit front-end module in the terminal is judged to have the harmonic falling in the frequency band of the GPS signal, the harmonic falling in the frequency band of the GPS signal is filtered by the filter module and then transmitted out through the antenna, and the purpose that the communication signal does not influence the GPS positioning is achieved.

S202, connecting a front-end module of a communication circuit of the terminal with a preset filtering module according to the first command signal.

In the embodiment of the invention, after receiving the first command signal, the non-fixed end of the switch module is connected with the connecting end of the filter module, so that the front-end module of the communication circuit is connected with the preset filter module.

And S203, transmitting the transmitting signal after being filtered by the filtering module.

In the embodiment of the invention, the transmitting signal does not contain harmonic waves interfering with the GPS signal after being filtered, and can be transmitted through the antenna.

The scheme fundamentally reduces the electromagnetic interference of the terminal transmitting signal, improves the electromagnetic compatibility (EMC) performance of the terminal transmitting signal, correspondingly improves the performance of the GPS after the electromagnetic interference of the terminal transmitting signal is reduced, so that a user can accurately and timely acquire the positioning information when applying GPS positioning, and the experience of the user is improved. In addition, because the noise signal that influences GPS can not get into the antenna at all, consequently, relevant personnel just need not consider the coexistence problem of antenna and GPS signal when designing the antenna, this degree of difficulty that will greatly reduced antenna design, also will greatly reduced antenna and terminal's research and development cost simultaneously, promote the EMC level at whole terminal.

Optionally, the method further comprises:

In the embodiment of the invention, when the harmonic wave does not fall in the frequency band of the GPS signal, the transmitted signal does not contain the harmonic wave which affects the currently used GPS signal, and special GPS filtering is not needed to be carried out on the transmitted signal, so that the transmitted signal can be directly transmitted through the antenna.

Optionally, the method further comprises:

s301, before transmitting the transmitting signal which is not filtered by the filtering wave module, transmitting a second command signal to a preset switch module; the second command signal comprises a command signal to turn off the switch module.

In an embodiment of the present invention, the second command signal is a command signal for switching on the communication circuit front end module and the antenna and switching off the communication circuit front end module and the filtering module by the switch module.

The second command signal is mainly used for commanding the switch module to directly connect the communication circuit front-end module with the antenna switch, so that when the harmonic contained in the transmitting signal of the communication circuit front-end module is judged not to have the harmonic falling in the frequency band of the GPS signal, the transmitting signal of the communication circuit front-end module is directly transmitted out through the antenna.

And S302, connecting a front-end module of a communication circuit of the terminal with a preset antenna switch according to the second command signal.

In the embodiment of the invention, after receiving the second command signal, the non-fixed end of the switch module is connected with the connecting end of the preset antenna switch, and the non-fixed end of the switch module is connected with the connecting end of the filter module, so that the front-end module of the communication circuit is directly connected with the antenna without passing through the preset filter module.

And S303, transmitting the transmitting signal to an antenna through an antenna switch and transmitting the transmitting signal.

In the embodiment of the present invention, the harmonic waves affecting the GPS signal in the terminal can be filtered out through the above scheme, which is described below by way of example. With the rapid development of the network era, people have entered the 4G network era at present, however, the 4G network brings about a quick internet experience to people and also brings about some troubles, for example, when a user browses a web page or watches a video through the 4G network, if the user is just using the GPS function at this time, the positioning function of the GPS is seriously affected, so that the GPS positioning is slow, or even the positioning cannot be performed, at this time, the harmonic wave affecting the GPS function in the LTE Band13 needs to be filtered out, it can be known through experiments that the LTE Band harmonic wave affecting the GPS function is mainly a second harmonic wave, therefore, the application performance of the GPS can be improved only by filtering out the second harmonic wave in the LTE Band13, at this time, other harmonic waves also exist in the LTE Band13, but we do not need to filter out, so as to avoid affecting the normal use of other application functions of the terminal.

In order to achieve the above object, the present invention further provides a terminal filtering system 01, as shown in fig. 4 and 5, the system includes: a processing module 02 and a filtering module 03;

the processing module 02 is configured to:

In the embodiment of the present invention, as soon as the terminal starts to establish communication, the processing module 02 starts to detect the transmission signal of the front-end module of the communication circuit, where the frequency of the transmission signal is detected, and in the embodiment of the present invention, the specific detection method is not limited, and after the frequency f0 of the transmission signal is detected, the harmonic f1 in the frequency f0 is further calculated. Here, too, no limitation is imposed on the specific calculation method. The calculated harmonic f1 is then compared to the known signal band for GPS, which is typically 1575.42MHz +/-1 MHz.

Optionally, the system further comprises: a communication circuit front end module 04, a switch module 05 and an antenna 06.

The communication circuit front end module 04 is configured to: a transmit signal is generated.

In the embodiment of the present invention, based on the above description of the optional mobile terminal hardware structure and the communication system, the wireless communication module (i.e. the above mobile communication unit 110) is further described in detail from another perspective.

The wireless communication module is composed of a chip platform, a radio frequency front end (namely the communication circuit front end module 03) and an antenna. Fig. 5 is a general architecture diagram of a wireless communication module of the terminal. The chip platform comprises a baseband chip, a radio frequency chip, a Power management chip and the like, and the radio frequency front end (i.e. the communication circuit front end module 03 of the invention) comprises devices such as a SAW (Surface AcoustIC Wave) filter, a Duplexer (Duplexer), a Low Pass Filter (LPF), a Power Amplifier (Power Amplifier), a Switch (Switch) and the like. The baseband chip is responsible for processing a physical layer algorithm and a high-level protocol, and relates to the realization of multi-mode interoperation; the radio frequency chip is responsible for the interconversion between the radio frequency signal and the baseband signal; the SAW filter is responsible for filtering the radio frequency signals of a receiving channel of the TDD system, and the duplexer is responsible for the duplex switching of the FDD system and the filtering of the radio frequency signals of a receiving/sending channel; the power amplifier is responsible for amplifying the radio frequency signal of the transmitting channel; the switch is responsible for the interconversion between the receiving channel and the transmitting channel; the antenna is responsible for interconversion between radio frequency signals and electromagnetic signals.

The front-end module 03 (rf front-end) of the communication circuit according to the present invention is further described in detail with reference to specific embodiments of the circuit structure.

For a time division duplex TDD system, a radio frequency front end mainly comprises devices such as a power amplifier, an SAW filter, a low-pass filter, a switch and the like; for a frequency division duplex FDD system, the radio frequency front end mainly comprises devices such as a power amplifier, a duplexer, a switch and the like. The increase of the number of the multiple frequency bands directly influences the increase of the number of the radio frequency front end filter, the power amplifier and the switch.

The radio frequency filter device: in order to suppress the influence of external interference signals on the sensitivity of a terminal receiving signal and suppress out-of-band interference of a transmission path radio frequency signal, a SAW filter and a low-pass filter are generally required to be respectively configured on a receiving channel and a transmitting channel of a TDD system radio frequency front end, and for an FDD system, a duplexer is required to be configured to solve the filtering problem of the radio frequency front end receiving channel and the transmitting channel. The number of filter elements increases linearly with the number of frequency bands.

Power amplification: unlike the filter device, the power amplifier is not only related to multiple bands, but also affected by multiple modes. Aiming at different modes of the same frequency band, the power amplifier architectures are different; if the frequency band and the mode requirement are clear, multiple modes can be supported on the same frequency band of the same power amplifier.

A switch: the complexity of the switch is closely related to the number of rf front-end transmit and receive channels. For a mobile communication system with receive diversity, two sets of switching devices are usually required, wherein one set is used for controlling the interconversion between the main receive channel and the transmit channel, and the other set is used for controlling the interconversion between the diversity receive channels.

The processing module 02 is further configured to: sending a first command signal prior to filtering the transmit signal; the first command signal includes a command signal for closing a predetermined switch module.

In the embodiment of the present invention, the first command signal is a command signal for the switch module 05 to disconnect the communication circuit front end module 04 from the antenna 06 and connect the communication circuit front end module 04 with the GPS filter 03.

The switch module 05 is used for: and connecting a communication circuit front-end module of the terminal with a preset filtering module according to the first command signal.

In the embodiment of the present invention, the switch module 05 is added to perform purposeful filtering when filtering a signal transmitted by a terminal, for example, for a GPS system in the terminal, only harmonics affecting a GPS function are filtered, specifically, only when it is detected that the transmitted signal includes harmonics affecting GPS positioning, the switch module is commanded to be closed, so that the front end module 04 of the communication circuit is connected to the GPS filter 03, thereby performing filtering operation on the harmonics affecting the GPS function in the transmitted signal, and for other harmonics included in the transmitted signal of the terminal, we may not perform processing first, so as to avoid affecting other application functions in the terminal.

In the embodiment of the present invention, the specific form of the switch module 05 is not limited, and may be any form of switch or relay, and any switch capable of implementing the scheme of the present invention is within the protection scope of the present invention. And there is no particular limitation on the number of the intelligent switches. The following description will be made by taking a single-pole double-throw switch as an example.

Optionally, the switch module 05 is a single pole double throw switch. The schematic structure is shown in fig. 6.

The single-pole double-throw switch is composed of a movable end and a fixed end, wherein the movable end is a so-called 'pole', and generally, in view of safety, the single-pole double-throw switch is connected with an incoming line of a power supply, namely, one end of an incoming call, and generally also one end connected with a handle of the switch; the fixed end is the two ends of the power output, and the fixed end and the power output are connected with the electric equipment. Function of single-pole double-throw switch: on one hand, the power supply can be controlled to output in two different directions, namely the power supply can be used for controlling two devices; on the other hand, the same equipment is controlled to be used for switching the operation direction.

In the embodiment of the invention, the switch or the relay adopting the single-pole double-throw principle can avoid the phenomenon that the two ends to be disconnected are not disconnected after the two ends to be connected are connected, and further avoid the phenomenon of disordered operation of the subsequent scheme.

Optionally, the system further comprises an antenna switch 07.

The antenna switch 07, as the name implies, is a mobile phone transmit-receive signal switch, and completes the transmit-receive switching and the switching among the frequency bands under the software support control. The mobile phone has an antenna switch, also called combiner, duplex filter, etc., and the switching of the switch is controlled by the processing module 02. In the embodiment of the present invention, the antenna switch 06 is usually directly connected between the antenna and the communication circuit front end module 04, as shown in fig. 7, based on this connection manner, when a user establishes communication through the terminal, if the communication signal contains a harmonic that interferes with the GPS positioning signal, the user may affect the positioning of the terminal due to the communication, and in order to avoid this phenomenon, the present invention adds the switch module 05 and the filter module 03 between the antenna switch 07 and the communication circuit front end module 04, and controls the connection and disconnection of the filter module 03 between the antenna switch 07 and the communication circuit front end module 04 through the on-off of the switch module 05, so as to achieve the purpose of filtering the harmonic that falls within the GPS signal frequency band through the filter module when the communication signal contains the harmonic within the GPS signal frequency band.

Optionally, the processing module 02 is connected to the control terminal of the communication circuit front-end module 04 and the control terminal of the switch module 05, respectively.

The output of the communication circuit front end module 04 is connected to a first end of the switch module 05.

The input end of the filter module 03 is connected to the second end.

The output of the filter module 03 is connected to the input of the antenna switch 07.

The third terminal is connected to the input terminal of the antenna switch 07.

In the embodiment of the present invention, based on the above circuit connection state, optionally, the command signal for closing the switch module 05 includes: command information for connecting the non-fixed end of the switch module 05 to the second end. That is, the first command signal includes: command information for disconnecting the non-fixed end from the third end and connecting the non-fixed end with the second end.

The filtering module 03 is configured to: and when the harmonic wave falls in the frequency band of the GPS signal, filtering the transmitted signal to filter the harmonic wave falling in the frequency band of the GPS signal.

In the embodiment of the present invention, the type and number of the filtering modules 03 are not specifically limited, and a filter capable of filtering out harmonics falling within the frequency band of the GPS signal is within the protection scope of the present invention.

The filtering module 03 of the invention can fundamentally reduce the electromagnetic interference of the terminal transmitting signal, improve the electromagnetic compatibility (EMC) performance of the terminal transmitting signal, and correspondingly improve the performance of the GPS after the electromagnetic interference of the terminal transmitting signal is reduced, so that a user can accurately and timely acquire positioning information when applying GPS positioning, and the experience of the user is improved.

The antenna 06 is used for: and transmitting the transmission signal filtered by the filtering module 03.

In the embodiment of the invention, the transmitted signal after being filtered by the filtering module 03 does not contain harmonic waves influencing the GPS, so that noise signals influencing the GPS do not enter the antenna at all, and relevant personnel do not need to consider the coexistence problem of the antenna and the GPS signals when designing the antenna, which greatly reduces the difficulty of antenna design, and also greatly reduces the research and development costs of the antenna and the terminal, and improves the EMC level of the whole terminal.

Alternatively,

the antenna 06 is also used for: and when the harmonic wave does not fall in the frequency band of the GPS signal, transmitting the transmission signal which is not filtered by the wave filtering module.

Alternatively,

the processing module 02 is further configured to: sending a second command signal to the switch module 05 before transmitting the transmit signal without filtering by the filtering module; the second command signal comprises a command signal to turn off the switching module 05.

In the embodiment of the present invention, based on the above-mentioned circuit connection state, the control command of the processing module 02 to the switch module 05 is divided into the first command signal and the second command signal.

The first command signal is described in detail above, and the second command signal is described further herein.

Similarly, in the embodiment of the present invention, based on the above circuit connection state, optionally, the command signal for turning off the switch module 05 includes: command information for disconnecting the non-fixed end of the switch module 05 from the second end and connecting the non-fixed end of the switch module 05 to the third end. That is, the second command signal includes: command information for disconnecting the non-fixed end from the second end and connecting the non-fixed end with the third end.

This second command signal is a command signal for causing the switching module 05 to switch the communication circuit front end module 04 on the antenna 06 and switch the communication circuit front end module 04 off the filtering module 03.

The second command signal is mainly used to instruct the switch module 05 to directly connect the communication circuit front-end module 04 with the antenna switch 07, so that when it is determined that the harmonic contained in the transmission signal of the communication circuit front-end module 04 does not have a harmonic falling within the frequency band of the GPS signal, the transmission signal of the communication circuit front-end module 04 is directly transmitted through the antenna.

The switch module 05 is also used for: the communication circuit front-end module of the terminal is connected to the antenna switch 07 according to the second command signal.

The antenna switch 07 is used to: the transmission signal is transmitted to the antenna 06 for transmission.

In the embodiment of the present invention, the harmonic waves affecting the GPS signal in the terminal can be filtered out by the above device, which is described below by way of example. With the rapid development of the network era, people have entered the 4G network era at present, however, the 4G network brings about a quick internet experience for people, and also brings about some troubles, for example, when a user browses a web page or watches a video through the 4G network, if the user is just using the GPS function, the positioning function of the GPS is seriously affected, so that the GPS positioning is slow, or even the positioning cannot be performed, at this time, the harmonic wave affecting the GPS function in the LTE Band13 needs to be filtered out by the filtering module 03, and the switching module 05 is closed, so that the front-end module 04 of the communication circuit is connected with the filtering module 03. Experiments show that the LTE Band harmonic which affects the GPS function is mainly the second harmonic, so the filtering module 03 only needs to filter the second harmonic in the LTE Band13 to improve the application performance of the GPS, and at this time, other harmonics exist in the LTE Band13, but do not need to be filtered, so as to avoid affecting the normal use of other application functions of the terminal.

In order to achieve the above object, the present invention further provides a terminal filtering apparatus 11, as shown in fig. 8 and 9, the apparatus including: a central processing unit CPU 12 and a global positioning system GPS filter 13.

The CPU 12 is configured to:

The GPS filter 13 is used to: and when the harmonic wave falls in the frequency band of the GPS signal, filtering the transmitted signal to filter the harmonic wave falling in the frequency band of the GPS signal.

Optionally, the apparatus further comprises: an intelligent switch 14.

The CPU 12 is also operable to: sending a first command signal prior to filtering the transmit signal; the first command signal comprises a command signal to close the smart switch.

The intelligent switch 14 is used for: the communication circuit front end module of the terminal is connected with the GPS filter according to the first command signal.

In the embodiment of the present invention, the intelligent switch 14 is added to perform purposeful filtering when filtering a signal transmitted by a terminal, for example, for a GPS system in the terminal, only harmonics affecting a GPS function are filtered, specifically, only when it is detected that the transmitted signal includes harmonics affecting GPS positioning, the intelligent switch 14 is commanded to be closed, so that a front end module of a communication circuit is connected to the GPS filter 13, thereby performing filtering operation on the harmonics affecting the GPS function in the transmitted signal, and for other harmonics included in the transmitted signal of the terminal, we may not perform processing first, so as to avoid affecting other application functions in the terminal.

Optionally, the smart switch 14 is a single pole double throw switch.

Alternatively,

the CPU 12 is connected to the control terminal of the front-end module of the communication circuit and the control terminal of the intelligent switch 14, respectively.

The output of the communication circuit front-end module is connected to a first terminal of the intelligent switch 14.

The input of the GPS filter 13 is connected to the second terminal.

The output of the GPS filter 13 is connected to the input of a preset antenna switch.

The third end is connected with the input end of the antenna switch.

Optionally, the command signal for closing the intelligent switch 14 includes: and command information for connecting the non-fixed end of the intelligent switch with the second end.

Alternatively,

the CPU 12 is also operable to: when the harmonic does not fall within the frequency band of the GPS signal, a second command signal is sent to the smart switch 14 before the transmission signal, which is not filtered by the GPS filter 13, is transmitted through the antenna; the second command signal comprises a command signal to turn off the smart switch.

The intelligent switch 14 is also used for: and connecting the communication circuit front-end module of the terminal with the antenna switch according to the second command signal.

Optionally, the command signal for turning off the intelligent switch 14 includes: command information for disconnecting the non-fixed end of the intelligent switch 14 from the second end and connecting the non-fixed end of the intelligent switch 14 to the third end.

In the embodiment of the present invention, the harmonic waves affecting the GPS signal in the terminal can be filtered out by the above device, which is described below by way of example. With the rapid development of the network era, people have entered the 4G network era at present, however, the 4G network brings about a quick internet experience for people, and also brings about some troubles, for example, when a user browses a web page or watches a video through the 4G network, if the user is just using the GPS function, the positioning function of the GPS is seriously affected, so that the GPS positioning is slow, or even the positioning cannot be performed, at this time, the harmonic wave affecting the GPS function in the LTE Band13 needs to be filtered out through the GPS filter 13, so that the intelligent switch 14 is closed, and the front-end module of the communication circuit is connected with the filtering module 13. Experiments show that the LTE Band harmonic influencing the GPS function is mainly the second harmonic, so that the GPS filter 13 can improve the application performance of the GPS only by filtering the second harmonic in the LTE Band13, and at the moment, other harmonics exist in the LTE Band13 but do not need to be filtered so as to avoid influencing the normal use of other application functions of the terminal.

Having thus described all of the essential features of the inventive arrangements, it should be noted that the above are specific examples of the inventive arrangements, that other embodiments may be selected, that any embodiment which is the same or similar to the inventive arrangements, and that any combination of the essential features of the inventive arrangements is within the scope of the invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A method for filtering a terminal, the method comprising:

the method comprises the steps that the output end of a front-end module of a communication circuit is connected with the first end of a switch module, the first output end of the switch module is connected with the input end of an antenna switch, and the second output end of the switch module is connected with the input end of the antenna switch through a Global Positioning System (GPS) filter;

when a terminal establishes communication, acquiring the frequency of a terminal transmitting signal, and calculating the harmonic wave of the transmitting signal; and when the harmonic wave is judged to be in the frequency band of the GPS signal, controlling the switch module to communicate a front-end module of a communication circuit of the terminal with the GPS filter, filtering the transmitting signal, and transmitting the transmitting signal after the harmonic wave is filtered out through the antenna switch.

2. The terminal filtering method according to claim 1, wherein said controlling the switch module to connect a communication circuit front-end module of the terminal to the GPS filter when it is determined that the harmonic falls within a frequency band of a GPS signal comprises:

sending a first command signal prior to filtering the transmit signal; the first command signal comprises a command signal to close the switch module;

and closing the switch module according to the first command signal, and communicating a communication circuit front end module of the terminal with the GPS filter.

3. The terminal filtering method of claim 2, wherein the method further comprises:

and when the harmonic does not fall in the frequency band of the GPS signal, controlling the switch module to transmit the transmitting signal which is not filtered by the GPS filter.

4. The terminal filtering method of claim 3, wherein when the harmonic does not fall within the frequency band of the GPS signal, controlling the switch module to transmit a transmission signal that is not filtered by the GPS filter comprises:

sending a second command signal to the switch module before transmitting a transmit signal that has not been filtered by the GPS filter; the second command signal comprises a command signal to turn off the switch module;

communicating a communication circuit front-end module of the terminal with an antenna switch according to the second command signal;

and transmitting the transmitting signal to an antenna through the antenna switch to be transmitted.

5. A terminal filtering apparatus, characterized in that the apparatus comprises: the intelligent terminal comprises a Central Processing Unit (CPU), a Global Positioning System (GPS) filter and an intelligent switch, wherein the output end of a front-end module of a communication circuit of the terminal is connected with the input end of the intelligent switch, the first output end of the intelligent switch is connected with the input end of an antenna switch, and the second output end of the intelligent switch is connected with the input end of the antenna switch through the GPS filter; wherein,

the CPU is used for acquiring the frequency of a terminal transmitting signal when the terminal establishes communication, calculating the harmonic wave of the transmitting signal and judging whether the harmonic wave falls in the frequency band of a GPS signal;

the intelligent switch is used for communicating a front-end module of a communication circuit of the terminal with the GPS filter when the harmonic wave falls within a frequency band of a GPS signal;

and the GPS filter is used for filtering the transmitting signal and filtering the harmonic waves falling in the frequency band of the GPS signal.

6. The terminal filtering device of claim 5,

the CPU is also used for sending a first command signal before filtering the transmitting signal; the first command signal comprises a command signal to close the smart switch;

the intelligent switch is specifically used for communicating a front-end module of a communication circuit of the terminal with the GPS filter according to the first command signal.

7. The terminal filtering device according to claim 5, wherein the intelligent switch is a single-pole double-throw switch;

the single-pole double-throw switch comprises a control end, a movable end and a fixed end; the movable end comprises a fixed end and a non-fixed end; the fixed end comprises a first end, a second end and a third end;

wherein the control end is connected with the movable end; the fixed end is fixed on the first end.

8. The terminal filtering device of claim 7,

the CPU is respectively connected with the control end of the front-end module of the communication circuit and the control end of the intelligent switch;

the output end of the communication circuit front-end module is connected with the first end of the intelligent switch, and the first end is the input end of the intelligent switch;

the input end of the GPS filter is connected with the second end, and the second end is a first output end of the intelligent switch;

the output end of the GPS filter is connected with the input end of the antenna switch;

the third end is connected with the input end of the antenna switch, and the third end is the second output end of the intelligent switch.

9. The terminal filtering device of claim 8,

the CPU is also used for sending a second command signal to the intelligent switch before transmitting a transmitting signal which is not filtered by the GPS filter through an antenna when the harmonic wave does not fall in the frequency band of the GPS signal; the second command signal comprises a command signal to turn off the smart switch;

and the intelligent switch is also used for communicating a communication circuit front-end module of the terminal with the antenna switch according to the second command signal.

10. A filterable terminal, characterized in that it comprises a terminal filtering device according to any one of claims 5 to 9.