CN106814377A - A kind of GPS radio frequency front-end circuit - Google Patents
A kind of GPS radio frequency front-end circuit Download PDFInfo
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- CN106814377A CN106814377A CN201611160680.9A CN201611160680A CN106814377A CN 106814377 A CN106814377 A CN 106814377A CN 201611160680 A CN201611160680 A CN 201611160680A CN 106814377 A CN106814377 A CN 106814377A
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- gps
- signal
- gain
- gps signal
- circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/36—Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end
Abstract
The invention discloses a kind of GPS radio frequency front-end circuit, wherein, the circuit includes：Antenna, for receiving gps signal；Antenna tuner, for matching the impedance between the RF front-end circuit and antenna, and adjusts the output gps signal of antenna tuner according to the control signal from GPS so that the amplitude of output gps signal is maximum；GPS, for receiving the gps signal from antenna tuner, and produces control signal according to the gps signal, and the control signal is for adjusting antenna tuner.
Description
Technical field
The present invention relates to GPS (Global Positioning System, global positioning system) technology, espespecially a kind of GPS
RF front-end circuit is designed.
Background technology
GPS navigation, the application for positioning are more and more universal.But, the gps signal of mobile terminal is easily by many factors
Influence, and then GPS signal strength is reduced, cause real time position to update the problems such as postponing, position inaccurate.
At present, the influence factor to mobile terminal gps signal mainly includes following several respects：
First, the position movement of mobile terminal when especially translational speed is very fast, easily causes GPS signal strength decrease；
Second, gps satellite signal is poor, and GPS signal strength can be caused to weaken；
3rd, gps antenna signal is placed on when in the automobile for pasted metal film by metallic shield, such as mobile phone, cellphone GPS day
Line signal is easily shielded by the metal film of automobile.
How to ensure gps signal quality, improve Consumer's Experience, be those skilled in the art electric in design GPS radio frequency front end
The problem for needing to consider during road.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of global positioning satellite GPS radio frequency front-end circuit, can
Ensure gps signal quality, improve Consumer's Experience.
In order to reach the object of the invention, the invention provides a kind of GPS radio frequency front-end circuit, including：
Antenna, for receiving gps signal；
Antenna tuner, for matching the impedance between the RF front-end circuit and antenna, and connects according to from GPS
The control signal of receipts machine adjusts the output gps signal of antenna tuner so that the amplitude of output gps signal is maximum；
GPS, for receiving the gps signal from antenna tuner, and produces control letter according to the gps signal
Number, the control signal is used to adjust antenna tuner.
In other illustrative embodiments, the circuit also includes：
It is arranged on the gain-adjustable low-noise amplifier LNA between antenna tuner and GPS；
The gain-adjustable low-noise amplifier LNA, for amplifying the gps signal from antenna tuner, and will amplify
Gps signal afterwards is sent to the GPS；And gps signal gain is carried out according to the control signal from GPS
Compensation；
The GPS, is additionally operable to receive the gps signal from adjustable gain LNA, and produced according to the gps signal
Control signal, the control signal is used to adjust adjustable gain LNA.
In other illustrative embodiments, the GPS is additionally operable to produce control signal according to the gps signal,
The control signal is used to adjust adjustable gain LNA, including：
The GPS, is additionally operable to the gain turn down value in different radio transmission environment according to the signal for storing, and obtains
The corresponding gain turn down value of the gps signal for receiving is taken, gps signal gain benefit is carried out using the gain turn down value for getting
Repay.
In other illustrative embodiments, gain turn down value of the signal in different radio transmission environment is by setting
In the memory storage of the circuit external.
In other illustrative embodiments, the circuit also includes：
It is arranged on the wave filter between antenna tuner and adjustable gain LNA；
The wave filter, for carrying out the gps signal from antenna tuner with outer filtering.
In order to reach the purpose of the present invention, present invention also offers a kind of GPS radio frequency front-end circuit, the circuit includes：
Antenna, for receiving gps signal；
Antenna tuner, for matching the impedance between the RF front-end circuit and antenna, and connects according to from GPS
The control signal of receipts machine adjusts the output gps signal of antenna tuner so that the amplitude of output gps signal is maximum；
Directional coupler, for separating the gps signal from antenna tuner, the first via gps signal input isolated
To GPS, the second tunnel coupling gps signal also inputs to GPS；
GPS, produces for receiving the signal from directional coupler, and coupling gps signal according to second tunnel
Raw control signal, the control signal is used to adjust antenna tuner.
In other illustrative embodiments, the circuit also includes：
It is arranged on the gain-adjustable low-noise amplifier LNA between directional coupler and GPS；
The gain-adjustable low-noise amplifier LNA, for amplifying the first via gps signal from directional coupler, and
Gps signal after amplification is sent to the GPS；And carry out first according to the control signal from GPS
Road gps signal gain compensation；
The GPS, is additionally operable to receive the gps signal from adjustable gain LNA, and according to from directional couple
The second tunnel coupling gps signal of device produces control signal regulation adjustable gain LNA.
In other illustrative embodiments, the GPS is additionally operable to according to the second tunnel from directional coupler
Coupling gps signal produces control signal regulation adjustable gain LNA, including：
The GPS, is additionally operable to the gain turn down value in different radio transmission environment according to the signal for storing, and obtains
The the second tunnel coupling corresponding gain turn down value of gps signal for receiving is taken, the is carried out using the gain turn down value for getting
Gps signal gain compensation all the way.
In other illustrative embodiments, gain turn down value of the signal in different radio transmission environment is by setting
In the memory storage of the circuit external.
In other illustrative embodiments, the circuit also includes：
It is arranged on the wave filter between directional coupler and adjustable gain LNA；
The wave filter, for carrying out the first via gps signal from directional couple with outer filtering.
The GPS radio frequency front-end circuit of technical solution of the present invention includes：Antenna, for receiving gps signal；Antenna tuner,
For matching the impedance between the RF front-end circuit and antenna, and according to the control signal regulation from GPS
The output gps signal of antenna tuner so that the amplitude of output gps signal is maximum；GPS, antenna is come from for receiving
The gps signal of tuner, and control signal is produced according to the gps signal, the control signal is for adjusting antenna tuner.This
Inventive technique scheme ensure that gps signal quality, improve Consumer's Experience.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is that the hardware configuration of the mobile terminal for realizing each embodiment of the invention is illustrated；
Fig. 2 is embodiment of the present invention GPS radio frequency front-end circuit schematic diagram；
Fig. 3 is another embodiment of the present invention GPS radio frequency front-end circuit schematic diagram；
Fig. 4 is another embodiment of the present invention GPS radio frequency front-end circuit schematic diagram；
Fig. 5 is another embodiment of the present invention GPS radio frequency front-end circuit schematic diagram；
Fig. 6 is another embodiment of the present invention GPS radio frequency front-end circuit schematic diagram；
Fig. 7 is another embodiment of the present invention GPS radio frequency front-end circuit schematic diagram.
Specific embodiment
Technical scheme is described in detail below in conjunction with drawings and Examples.
The mobile terminal of each embodiment of the invention is realized referring now to Description of Drawings.In follow-up description, use
For represent element such as " module ", " part " or " unit " suffix only for being conducive to explanation of the invention, itself
Not specific meaning.Therefore, " module " can be used mixedly with " part ".
Mobile terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as moving
Phone, smart phone, notebook computer, digit broadcasting receiver, PDA (personal digital assistant), PAD (panel computer), PMP
The mobile terminal of (portable media player), guider etc. and such as numeral TV, desktop computer etc. are consolidated
Determine terminal.Hereinafter it is assumed that terminal is mobile terminal.However, it will be understood by those skilled in the art that, except being used in particular for movement
Outside the element of purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Fig. 1 is the hardware architecture diagram of the mobile terminal for realizing each embodiment of the invention.
Mobile terminal 1 00 can include wireless communication unit 110, A/V (audio/video) input block 120, user input
Unit 130, sensing unit 140, output unit 150, memory 160, interface unit 170, controller 180 and power subsystem 190
Etc..Fig. 1 shows the mobile terminal with various assemblies, it should be understood that being not required for implementing all groups for showing
Part.More or less component can alternatively be implemented.The element of mobile terminal will be discussed in more detail below.
Wireless communication unit 110 generally includes one or more assemblies, and it allows mobile terminal 1 00 and wireless communication system
Or the radio communication between network.For example, wireless communication unit can include broadcasting reception module 111, mobile communication module
112nd, at least one of wireless Internet module 113, short range communication module 114 and location information module 115.
Broadcasting reception module 111 receives broadcast singal and/or broadcast via broadcast channel from external broadcast management server
Relevant information.Broadcast channel can include satellite channel and/or terrestrial channel.Broadcast management server can be generated and sent
The broadcast singal and/or broadcast related information generated before the server or reception of broadcast singal and/or broadcast related information
And send it to the server of terminal.Broadcast singal can include TV broadcast singals, radio signals, data broadcasting
Signal etc..And, broadcast singal may further include the broadcast singal combined with TV or radio signals.Broadcast phase
Pass information can also be provided via mobile communications network, and in this case, broadcast related information can be by mobile communication mould
Block 112 is received.Broadcast singal can exist in a variety of manners, for example, it can be with the electronics of DMB (DMB)
The form of program guide (EPG), the electronic service guidebooks (ESG) of digital video broadcast-handheld (DVB-H) etc. and exist.Broadcast
Receiver module 111 can receive signal and broadcast by using various types of broadcast systems.Especially, broadcasting reception module 111
Can be wide by using such as multimedia broadcasting-ground (DMB-T), DMB-satellite (DMB-S), digital video
Broadcast-hand-held (DVB-H), forward link media (MediaFLO@) Radio Data System, received terrestrial digital broadcasting integrated service
Etc. (ISDB-T) digit broadcasting system receives digital broadcasting.Broadcasting reception module 111 may be constructed such that and be adapted to provide for extensively
Broadcast the various broadcast systems and above-mentioned digit broadcasting system of signal.Via broadcasting reception module 111 receive broadcast singal and/
Or broadcast related information can be stored in memory 160 (or other types of storage medium).
Mobile communication module 112 sends radio signals to base station (for example, access point, node B etc.), exterior terminal
And at least one of server and/or receive from it radio signal.Such radio signal can be logical including voice
Words signal, video calling signal or the various types of data for sending and/or receiving according to text and/or Multimedia Message.
Wireless Internet module 113 supports the Wi-Fi (Wireless Internet Access) of mobile terminal.The module can be internally or externally
It is couple to terminal.Wi-Fi (Wireless Internet Access) technology involved by the module can include WLAN (WLAN) (Wi-Fi), Wibro
(WiMAX), Wimax (worldwide interoperability for microwave accesses), HSDPA (high-speed downlink packet access) etc..
Short range communication module 114 is the module for supporting junction service.Some examples of short-range communication technology include indigo plant
ToothTM, radio frequency identification (RFID), Infrared Data Association (IrDA), ultra wide band (UWB), purple honeybeeTMEtc..
Location information module 115 is the module for checking or obtaining the positional information of mobile terminal.Location information module
Typical case be GPS (global positioning system).According to current technology, GPS module 115 is calculated and comes from three or more satellites
Range information and correct time information and the Information application triangulation for calculating, so as to according to longitude, latitude
Highly accurately calculate three-dimensional current location information.Currently, defended using three for calculating the method for position and temporal information
Star and the position that is calculated by using other satellite correction and the error of temporal information.Additionally, GPS module 115
Can be by Continuous plus current location information in real time come calculating speed information.
A/V input blocks 120 are used to receive audio or video signal.A/V input blocks 120 can include the He of camera 121
Microphone 1220, the static map that 121 pairs, camera is obtained in Video Capture pattern or image capture mode by image capture apparatus
The view data of piece or video is processed.Picture frame after treatment may be displayed on display unit 151.At camera 121
Picture frame after reason can be stored in memory 160 (or other storage mediums) or carried out via wireless communication unit 110
Send, two or more cameras 1210 can be provided according to the construction of mobile terminal.Microphone 122 can be in telephone relation mould
Sound (voice data) is received via microphone in formula, logging mode, speech recognition mode etc. operational mode, and can be by
Such acoustic processing is voice data.Audio (voice) data after treatment can be changed in the case of telephone calling model
For the form that can be sent to mobile communication base station via mobile communication module 112 is exported.Microphone 122 can implement all kinds
Noise eliminate (or suppress) algorithm eliminating (or suppression) in the noise for receiving and producing during sending audio signal or
Person disturbs.
User input unit 130 can generate key input data to control each of mobile terminal according to the order of user input
Plant operation.User input unit 130 allows the various types of information of user input, and can include keyboard, metal dome, touch
Plate (for example, detection due to being touched caused by resistance, pressure, electric capacity etc. change sensitive component), roller, rocking bar etc.
Deng.Especially, when touch pad is superimposed upon on display unit 151 in the form of layer, touch-screen can be formed.
Sensing unit 140 detects the current state of mobile terminal 1 00, (for example, mobile terminal 1 00 opens or closes shape
State), the presence or absence of the contact (that is, touch input) of the position of mobile terminal 1 00, user for mobile terminal 1 00, mobile terminal
The acceleration or deceleration movement of 100 orientation, mobile terminal 1 00 and direction etc., and generate for controlling mobile terminal 1 00
The order of operation or signal.For example, when mobile terminal 1 00 is embodied as sliding-type mobile phone, sensing unit 140 can be sensed
The sliding-type phone is opened or closed.In addition, sensing unit 140 can detect power subsystem 190 whether provide electric power or
Whether person's interface unit 170 couples with external device (ED).Sensing unit 140 can will be combined below including proximity transducer 1410
Touch-screen is described to this.
Interface unit 170 is connected the interface that can pass through with mobile terminal 1 00 as at least one external device (ED).For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charger) port, wired or nothing
Line FPDP, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Identification module can be that storage uses each of mobile terminal 1 00 for verifying user
Kind of information and subscriber identification module (UIM), client identification module (SIM), Universal Subscriber identification module (USIM) can be included
Etc..In addition, the device (hereinafter referred to as " identifying device ") with identification module can take the form of smart card, therefore, know
Other device can be connected via port or other attachment means with mobile terminal 1 00.Interface unit 170 can be used for reception and come from
The input (for example, data message, electric power etc.) of the external device (ED) and input that will be received is transferred in mobile terminal 1 00
One or more elements can be used for transmitting data between mobile terminal and external device (ED).
In addition, when mobile terminal 1 00 is connected with external base, interface unit 170 can serve as allowing by it by electricity
Power provides to the path of mobile terminal 1 00 from base or can serve as allowing the various command signals being input into from base to pass through it
It is transferred to the path of mobile terminal.Be can serve as recognizing that mobile terminal is from the various command signals or electric power of base input
The no signal being accurately fitted within base.Output unit 150 is configured to provide defeated with vision, audio and/or tactile manner
Go out signal (for example, audio signal, vision signal, alarm signal, vibration signal etc.).Output unit 150 can include display
Unit 151, dio Output Modules 152, alarm unit 153 etc..
Display unit 151 may be displayed on the information processed in mobile terminal 1 00.For example, when mobile terminal 1 00 is in electricity
During words call mode, display unit 151 can show and converse or other communicate (for example, text messaging, multimedia file
Download etc.) related user interface (UI) or graphic user interface (GUI).When mobile terminal 1 00 is in video calling pattern
Or during image capture mode, display unit 151 can show the image of capture and/or the image of reception, show video or figure
UI or GUI of picture and correlation function etc..
Meanwhile, when display unit 151 and touch pad in the form of layer it is superposed on one another to form touch-screen when, display unit
151 can serve as input unit and output device.Display unit 151 can include liquid crystal display (LCD), thin film transistor (TFT)
In LCD (TFT-LCD), Organic Light Emitting Diode (OLED) display, flexible display, three-dimensional (3D) display etc. at least
It is a kind of.Some in these displays may be constructed such that transparence to allow user to be watched from outside, and this is properly termed as transparent
Display, typical transparent display can be, for example, TOLED (transparent organic light emitting diode) display etc..According to specific
Desired implementation method, mobile terminal 1 00 can include two or more display units (or other display devices), for example, moving
Dynamic terminal can include outernal display unit (not shown) and inner display unit (not shown).Touch-screen can be used to detect touch
Input pressure and touch input position and touch input area.
Dio Output Modules 152 can mobile terminal be in call signal reception pattern, call mode, logging mode,
It is that wireless communication unit 110 is received or in memory 160 when under the isotypes such as speech recognition mode, broadcast reception mode
The voice data transducing audio signal of middle storage and it is output as sound.And, dio Output Modules 152 can be provided and movement
The audio output (for example, call signal receives sound, message sink sound etc.) of the specific function correlation that terminal 100 is performed.
Dio Output Modules 152 can include loudspeaker, buzzer etc..
Alarm unit 153 can provide output and be notified to mobile terminal 1 00 with by event.Typical event can be with
Including calling reception, message sink, key signals input, touch input etc..In addition to audio or video is exported, alarm unit
153 can in a different manner provide output with the generation of notification event.For example, alarm unit 153 can be in the form of vibrating
Output is provided, when calling, message or some other entrance communication (incoming communication) are received, alarm list
Unit 153 can provide tactile output (that is, vibrating) to notify to user.Exported by providing such tactile, even if
When in pocket of the mobile phone of user in user, user also can recognize that the generation of various events.Alarm unit 153
The output of the generation of notification event can be provided via display unit 151 or dio Output Modules 152.
Memory 160 can store software program for the treatment and control operation performed by controller 180 etc., Huo Zheke
Temporarily to store oneself data (for example, telephone directory, message, still image, video etc.) through exporting or will export.And
And, memory 160 can store the vibration of various modes on being exported when touching and being applied to touch-screen and audio signal
Data.
Memory 160 can include the storage medium of at least one type, and the storage medium includes flash memory, hard disk, many
Media card, card-type memory (for example, SD or DX memories etc.), random access storage device (RAM), static random-access storage
Device (SRAM), read-only storage (ROM), Electrically Erasable Read Only Memory (EEPROM), programmable read only memory
(PROM), magnetic storage, disk, CD etc..And, mobile terminal 1 00 can perform memory with by network connection
The network storage device cooperation of 160 store function.
The overall operation of the generally control mobile terminal of controller 180.For example, controller 180 is performed and voice call, data
Communication, video calling etc. related control and treatment.In addition, controller 180 can be included for reproducing (or playback) many matchmakers
The multi-media module 1810 of volume data, multi-media module 1810 can be constructed in controller 180, or can be structured as and control
Device processed 180 is separated.Controller 180 can be with execution pattern identifying processing, the handwriting input that will be performed on the touchscreen or figure
Piece draws input and is identified as character or image.
Power subsystem 190 receives external power or internal power under the control of controller 180 and provides operation each unit
Appropriate electric power needed for part and component.
Various implementation methods described herein can be with use such as computer software, hardware or its any combination of calculating
Machine computer-readable recording medium is implemented.Implement for hardware, implementation method described herein can be by using application-specific IC
(ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), scene can
Programming gate array (FPGA), processor, controller, microcontroller, microprocessor, it is designed to perform function described herein
At least one in electronic unit is implemented, and in some cases, such implementation method can be implemented in controller 180.
For software implementation, the implementation method of such as process or function can with allow to perform the single of at least one function or operation
Software module is implemented.Software code can be come by the software application (or program) write with any appropriate programming language
Implement, software code can be stored in memory 160 and performed by controller 180.
So far, oneself according to its function through describing mobile terminal.Below, for the sake of brevity, will description such as folded form,
Slide type mobile terminal in various types of mobile terminals of board-type, oscillating-type, slide type mobile terminal etc. is used as showing
Example.Therefore, the present invention can be applied to any kind of mobile terminal, and be not limited to slide type mobile terminal.
Based on above-mentioned mobile terminal hardware configuration, the inventive method each embodiment is proposed.
A kind of GPS radio frequency front-end circuit is the embodiment of the invention provides, the circuit is applied to mobile terminal, such as Fig. 2 institutes
Show, the circuit includes：
Antenna 20, for receiving gps signal；
Antenna tuner 21, for matching the impedance between the RF front-end circuit and antenna, and according to from GPS
The control signal of receiver adjusts the output gps signal of antenna tuner so that the amplitude of output gps signal is maximum；
Due to different antennas, working frequency, the impedance that antenna is presented has very big difference, and the impedance for so causing is not
Matching causes very lossy to signal transmission, results even in not working or damaging for receiver, and the antenna tuner is to connect
A kind of impedance matching network of receiver and antenna is connect, it can make impedance matching between receiver and antenna, so that antenna exists
There is the radiant power of maximum in any frequency；
GPS 22, for receiving the gps signal from antenna tuner, and produces control letter according to the gps signal
Number, the control signal is used to adjust antenna tuner；
The GPS 22 is sampled by the gps signal for receiving, height analysis, and by control signal
The amplitude of control 21 pairs of gps signals of reception of antenna tuner is adjusted, until detecting the amplitude of the gps signal for receiving
It is maximum.
Above-mentioned technical proposal, if gps signal is lacked of proper care in RF front-end circuit transmission, can be by feedback signal, i.e. institute
Control signal is stated, antenna tuner is adjusted, and then the gps signal of imbalance can be corrected, it is ensured that the GPS that GPS is received
Signal quality.
As shown in figure 3, in other illustrative embodiments, the circuit also includes：
It is arranged on the gain-adjustable low-noise amplifier LNA23 between antenna tuner 21 and GPS 22；
The gain-adjustable low-noise amplifier LNA23, for amplifying the gps signal from antenna tuner, and will put
Gps signal after big is sent to the GPS；And gps signal increasing is carried out according to the control signal from GPS
Benefit compensation；
Low-noise amplifier is typically used as the high frequency or intermediate-frequency preamplifier of all kinds of radio receivers, and highly sensitive
Spend the amplifying circuit of electron detection equipment.Amplifying the occasion of small-signal, the noise of low-noise amplifier itself is to signal
Interference very little, it is possible to increase the signal to noise ratio of output signal；
The GPS, is additionally operable to receive the gps signal from adjustable gain LNA, and produced according to the gps signal
Control signal, the control signal is used to adjust adjustable gain LNA.
The GPS can calculate the SNR of the gps signal for receiving, by the SNR and default SNR being calculated
Contrasted, known the increased Δ SNR of needs, gps signal gain is carried out by corresponding control signal control adjustable gain LNA
Compensation.
In other illustrative embodiments, to improve the speed of gps signal gain compensation, can be in advance by signal in difference
Gain turn down value in wireless transmission environments is stored, and the GPS is receiving the GPS from adjustable gain LNA
After signal, according to current wireless transmission environments, direct access Δ SNR.
In other illustrative embodiments, gain turn down value of the signal in different radio transmission environment can be by setting
The memory storage in the circuit external is put, facilitates person skilled to be modified renewal to the gain turn down value for recording.
With respect to the technical scheme shown in Fig. 2, the technical scheme shown in Fig. 3 can not only adjust antenna tuner, Neng Goujiu
The gps signal of positive imbalance, and adjustable gain LNA can be adjusted carry out gps signal gain compensation, it is ensured that GPS is input into
There are constant SNR indexs, overcome fading problem of the gps signal in different radio transmission environment.
As shown in figure 4, in other illustrative embodiments, the circuit also includes：
It is arranged on the wave filter between antenna tuner and adjustable gain LNA；
The wave filter, for carrying out the gps signal from antenna tuner with outer filtering.
Gps signal is carried out by the wave filter, with outer filtering, only allow gps signal by wave filter, can be further
Ensure the SNR of the gps signal that GPS is received.
In side circuit design, above-mentioned wave filter, adjustable gain LNA may be configured as being close to gps antenna, and ensure and other
The isolation of strong jamming circuit.
The embodiment of the present invention additionally provides a kind of GPS radio frequency front-end circuit, and the circuit is applied to mobile terminal, such as Fig. 5
Shown, the circuit includes：
Antenna 30, for receiving gps signal；
Antenna tuner 31, for matching the impedance between the RF front-end circuit and antenna, and according to from GPS
The control signal of receiver adjusts the output gps signal of antenna tuner so that the amplitude of output gps signal is maximum；
Due to different antennas, working frequency, the impedance that antenna is presented has very big difference, and the impedance for so causing is not
Matching causes very lossy to signal transmission, results even in not working or damaging for receiver, and the antenna tuner is to connect
A kind of impedance matching network of receiver and antenna is connect, it can make impedance matching between receiver and antenna, so that antenna exists
There is the radiant power of maximum in any frequency；
Directional coupler 33, for separating the gps signal from antenna tuner, first via gps signal, isolated
Two tunnels coupling gps signal is input into GPS；
GPS 32, for receiving the signal from directional coupler, and couples gps signal according to second tunnel
Producing control signal, the control signal is used to adjust antenna tuner；
The GPS 32 is sampled by the second tunnel coupling gps signal to receiving, height analysis, and is led to
The amplitude for crossing the gps signals of the control signal control reception of antenna tuner 31 pairs is adjusted, until detecting for receiving
The amplitude of gps signal is maximum all the way.
Above-mentioned technical proposal, if first via gps signal is lacked of proper care in RF front-end circuit transmission, can be by feedback letter
Number, i.e., described control signal adjusts antenna tuner, and then can correct the first via gps signal of imbalance, it is ensured that GPS receiver
The gps signal quality that machine is received.
As shown in fig. 6, in other illustrative embodiments, the circuit also includes：
It is arranged on the gain-adjustable low-noise amplifier LNA34 between directional coupler 33 and GPS 32；
The gain-adjustable low-noise amplifier LNA34, for amplifying the first via gps signal from directional coupler,
And send to the GPS gps signal after amplification；And carry out according to the control signal from GPS
Gps signal gain compensation all the way；
Low-noise amplifier is typically used as the high frequency or intermediate-frequency preamplifier of all kinds of radio receivers, and highly sensitive
Spend the amplifying circuit of electron detection equipment.Amplifying the occasion of small-signal, the noise of low-noise amplifier itself is to signal
Interference very little, it is possible to increase the signal to noise ratio of output signal；
The GPS 32, is additionally operable to receive the gps signal from adjustable gain LNA, and according to carrying out self orientation coupling
The second tunnel coupling gps signal of clutch produces control signal regulation adjustable gain LNA；
The GPS can calculate the SNR that the second tunnel for receiving couples gps signal, by the SNR that is calculated with
Default SNR is contrasted, and knows the increased Δ SNR of needs, is carried out by corresponding control signal control adjustable gain LNA
Gps signal gain compensation.
In other illustrative embodiments, to improve the speed of gps signal gain compensation, can be in advance by signal in difference
Gain turn down value in wireless transmission environments is stored, the GPS receive the second tunnel coupling gps signal after,
According to current wireless transmission environments, direct access Δ SNR.
In other illustrative embodiments, gain turn down value of the signal in different radio transmission environment can be by setting
The memory storage in the circuit external is put, facilitates person skilled to be modified renewal to the gain turn down value for recording.
Above-mentioned technical proposal can not only adjust antenna tuner, correct the gps signal of imbalance, and can adjust gain
Adjustable LNA carries out gps signal gain compensation, it is ensured that GPS input has constant SNR indexs, overcomes gps signal in difference
Fading problem in wireless transmission environments.
As shown in fig. 7, in other illustrative embodiments, the circuit also includes：
It is arranged on the wave filter 35 between directional coupler and adjustable gain LNA；
The wave filter 35, for carrying out the first via gps signal from directional couple with outer filtering.
Gps signal is carried out by the wave filter, with outer filtering, only allow gps signal by wave filter, can be further
Ensure the SNR of the gps signal that GPS is received.
In side circuit design, above-mentioned directional coupler, wave filter, adjustable gain LNA may be configured as being close to gps antenna,
And ensure to isolate with other strong jamming circuits.
It should be noted that herein, term " including ", "comprising" or its any other variant be intended to non-row
His property is included, so that process, method, article or device including a series of key elements not only include those key elements, and
And also include other key elements being not expressly set out, or also include for this process, method, article or device institute are intrinsic
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Also there is other identical element in the process of key element, method, article or device.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably implementation method.Based on such understanding, technical scheme is substantially done to prior art in other words
The part for going out contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions are used to so that a station terminal equipment (can be mobile phone, computer, clothes
Business device, air-conditioner, or network equipment etc.) perform method described in each embodiment of the invention.
The preferred embodiments of the present invention are these are only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of GPS radio frequency front-end circuit, it is characterised in that the circuit includes：
Antenna, for receiving gps signal；
Antenna tuner, for matching the impedance between the RF front-end circuit and antenna, and according to from GPS
Control signal adjust the output gps signal of antenna tuner so that the amplitude of output gps signal is maximum；
GPS, for receiving the gps signal from antenna tuner, and produces control signal, institute according to the gps signal
Control signal is stated for adjusting antenna tuner.
2. circuit as claimed in claim 1, it is characterised in that the circuit also includes：
It is arranged on the gain-adjustable low-noise amplifier LNA between antenna tuner and GPS；
The gain-adjustable low-noise amplifier LNA, for amplifying the gps signal from antenna tuner, and by after amplification
Gps signal is sent to the GPS；And gps signal gain benefit is carried out according to the control signal from GPS
Repay；
The GPS, is additionally operable to receive the gps signal from adjustable gain LNA, and produce control according to the gps signal
Signal, the control signal is used to adjust adjustable gain LNA.
3. circuit as claimed in claim 2, it is characterised in that the GPS, is additionally operable to be produced according to the gps signal
Control signal, the control signal is used to adjust adjustable gain LNA, including：
The GPS, is additionally operable to the gain turn down value in different radio transmission environment according to the signal for storing, and acquisition connects
The corresponding gain turn down value of gps signal for receiving, gps signal gain compensation is carried out using the gain turn down value for getting.
4. circuit as claimed in claim 3, it is characterised in that
Gain turn down value of the signal in different radio transmission environment is by being arranged on the memory storage of the circuit external.
5. circuit as claimed in claim 2, it is characterised in that the circuit also includes：
It is arranged on the wave filter between antenna tuner and adjustable gain LNA；
The wave filter, for carrying out the gps signal from antenna tuner with outer filtering.
6. a kind of GPS radio frequency front-end circuit, it is characterised in that the circuit includes：
Antenna, for receiving gps signal；
Antenna tuner, for matching the impedance between the RF front-end circuit and antenna, and according to from GPS
Control signal adjust the output gps signal of antenna tuner so that the amplitude of output gps signal is maximum；
Directional coupler, for separating the gps signal from antenna tuner, first via gps signal, the second road coupling isolated
Gps signal is closed to be input into GPS；
GPS, control is produced for receiving the signal from directional coupler, and coupling gps signal according to second tunnel
Signal processed, the control signal is used to adjust antenna tuner.
7. circuit as claimed in claim 6, it is characterised in that the circuit also includes：
It is arranged on the gain-adjustable low-noise amplifier LNA between directional coupler and GPS；
The gain-adjustable low-noise amplifier LNA, for amplifying the first via gps signal from directional coupler, and will put
Gps signal after big is sent to the GPS；And first via GPS is carried out according to the control signal from GPS
Signal gain is compensated；
The GPS, is additionally operable to receive the gps signal from adjustable gain LNA, and according to from directional coupler
Second tunnel coupling gps signal produces control signal regulation adjustable gain LNA.
8. circuit as claimed in claim 7, it is characterised in that the GPS, is additionally operable to according to from directional coupler
The second tunnel coupling gps signal produce control signal regulation adjustable gain LNA, including：
The GPS, is additionally operable to the gain turn down value in different radio transmission environment according to the signal for storing, and acquisition connects
The corresponding gain turn down value of the second tunnel coupling gps signal for receiving, the first via is carried out using the gain turn down value for getting
Gps signal gain compensation.
9. circuit as claimed in claim 8, it is characterised in that
Gain turn down value of the signal in different radio transmission environment sets the memory by being arranged on the circuit external
Storage.
10. circuit as claimed in claim 7, it is characterised in that the circuit also includes：
It is arranged on the wave filter between directional coupler and adjustable gain LNA；
The wave filter, for carrying out the first via gps signal from directional couple with outer filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611160680.9A CN106814377A (en) | 2016-12-15 | 2016-12-15 | A kind of GPS radio frequency front-end circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611160680.9A CN106814377A (en) | 2016-12-15 | 2016-12-15 | A kind of GPS radio frequency front-end circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106814377A true CN106814377A (en) | 2017-06-09 |
Family
ID=59109602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611160680.9A Pending CN106814377A (en) | 2016-12-15 | 2016-12-15 | A kind of GPS radio frequency front-end circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108388107A (en) * | 2018-02-01 | 2018-08-10 | 深圳市兴威帆电子技术有限公司 | GPS real time clock circuits and timing system |
| CN110730016A (en) * | 2019-10-15 | 2020-01-24 | 北京电子工程总体研究所 | Satellite signal retransmission device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5870402A (en) * | 1991-06-13 | 1999-02-09 | Raytheon Company | Multiple user digital receiver apparatus and method with time division multiplexing |
| CN101308955A (en) * | 2008-05-22 | 2008-11-19 | 杭州中科微电子有限公司 | Radio frequency integrated GPS active antenna |
| CN102271002A (en) * | 2010-06-03 | 2011-12-07 | 美国博通公司 | Radio front end and circuit |
| CN102694566A (en) * | 2011-03-22 | 2012-09-26 | 富士通半导体股份有限公司 | System and method for tuning an antenna in a wireless communication device |
| US20120306696A1 (en) * | 2010-02-05 | 2012-12-06 | Broadcom Corporation | Method and System for Integrated Glonass and GPS Processing |
-
2016
- 2016-12-15 CN CN201611160680.9A patent/CN106814377A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5870402A (en) * | 1991-06-13 | 1999-02-09 | Raytheon Company | Multiple user digital receiver apparatus and method with time division multiplexing |
| CN101308955A (en) * | 2008-05-22 | 2008-11-19 | 杭州中科微电子有限公司 | Radio frequency integrated GPS active antenna |
| US20120306696A1 (en) * | 2010-02-05 | 2012-12-06 | Broadcom Corporation | Method and System for Integrated Glonass and GPS Processing |
| CN102271002A (en) * | 2010-06-03 | 2011-12-07 | 美国博通公司 | Radio front end and circuit |
| CN102694566A (en) * | 2011-03-22 | 2012-09-26 | 富士通半导体股份有限公司 | System and method for tuning an antenna in a wireless communication device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108388107A (en) * | 2018-02-01 | 2018-08-10 | 深圳市兴威帆电子技术有限公司 | GPS real time clock circuits and timing system |
| CN108388107B (en) * | 2018-02-01 | 2023-11-21 | 深圳市兴威帆电子技术有限公司 | GPS real-time clock circuit and timing system |
| CN110730016A (en) * | 2019-10-15 | 2020-01-24 | 北京电子工程总体研究所 | Satellite signal retransmission device |
| CN110730016B (en) * | 2019-10-15 | 2021-07-27 | 北京电子工程总体研究所 | Satellite signal retransmission device |
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