CN206977401U - Ultra-broadband signal for indoor moving terminal positioning receives high-frequency electronic system - Google Patents
Ultra-broadband signal for indoor moving terminal positioning receives high-frequency electronic system Download PDFInfo
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- CN206977401U CN206977401U CN201720772045.XU CN201720772045U CN206977401U CN 206977401 U CN206977401 U CN 206977401U CN 201720772045 U CN201720772045 U CN 201720772045U CN 206977401 U CN206977401 U CN 206977401U
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Abstract
The utility model discloses a kind of ultra-broadband signal for indoor moving terminal positioning to receive high-frequency electronic system, belong to ultra wide band moving communicating field, solves the technical problem of pulse inter-frame-interference in multi-path environment in the prior art, strengthen the tracking performance of frequency synthesis loop, improve the accuracy of peak detection performance and indoor positioning.The utility model includes signal detection module, synchronized tracking module and the level switch module being sequentially connected；Signal detection module includes reception antenna, preamplifier, automatic gain controller, the triode peak detector stretcher compared with being sequentially connected；Synchronized tracking module is made up of the first frequency divider and frequency synthesis loop；Level switch module includes the level translator and level transmitter being connected with each other.The requirement of the Signal-to-Noise from indoor moving terminal is greatly lowered in the utility model, has the characteristics of simple in construction, strong adaptability and reliability are high, there is good mobile communication production, teaching ＆ research value and market prospects.
Description
Technical field
It the utility model is related to a kind of high-frequency electronic system, particularly a kind of ultra wide band for indoor moving terminal positioning
Signal receives high-frequency electronic system.
Background technology
Mobile terminal positioning technology common at present mainly has global satellite GPS location, bluetooth positioning, WLAN
WiFi positioning, mobile communication base station location technology etc..When indoor environment can not use satellite fix, indoor positioning technologies are used
As the auxiliary positioning of satellite fix, solve the problems, such as when satellite-signal reaches ground it is weaker, building can not be penetrated, it is final fixed
The position that position object is presently in.
Pulse ultra-broad band is a kind of novel no-load communication scheme using pulse mode, in the frequency spectrum resource of growing tension
Under the contradiction of ever-increasing location requirement, it has become future communications and a kind of excellent candidate technologies of positioning.Arteries and veins
Rushing ultra-broadband signal has good time sense and penetration capacity, is ranging and positioning under indoor dense multi-path environments
Extensive use is laid a good foundation.There are the following problems in existing UWB indoor position receiver technology：1. in multi-path environment
Pulse inter-frame-interference；2. the power spectral density of pulse signal is extremely low, making an uproar in band is also exaggerated while useful signal is amplified
Sound, signal is easy to be submerged among noise under complicated channel circumstance indoors, is lost so as to cause to detect front-end circuit
Detection function, influence the positioning of terminal；3. active device generation be present in synchronized tracking frequency synthesis loop (phase-locked loop PLL)
Thermal noise, influence loop tracks performance.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of ultra-broadband signal for indoor moving terminal positioning
High-frequency electronic system is received, the technical problem for solving pulse inter-frame-interference in multi-path environment in the prior art, strengthens frequency synthesis
The tracking performance of loop, improve the accuracy of peak detection performance and indoor positioning.
In order to solve the above-mentioned technical problem, the utility model is achieved in that the signal detection mould including being sequentially connected
Block, synchronized tracking module and level switch module；The signal detection module include be sequentially connected reception antenna, preposition amplification
Device, automatic gain controller, the triode peak detector stretcher compared with；
The reception antenna is used to receive the signal from indoor moving terminal, and exports to the preamplifier；Institute
Preamplifier is stated to be used to be amplified the signal of the indoor moving terminal；First input of the automatic gain controller
End is connected with the output end of the preamplifier, for controlling the multiplication factor of the preamplifier output signal, and it is defeated
Go out to the triode peak detector；The triode peak detector is used for the output letter to the automatic gain controller
Number carrying out peak envelop detection obtains rectified signal, and is exported by the first output end of the triode peak detector to institute
State and compare stretcher；The relatively stretcher is used to filter out the multipath noise in the rectified signal, is additionally operable to filtering out multipath
The rectified signal after noise carries out pulse stretching, and by the rectified signal after pulse stretching export to the synchronization with
Track module；
The synchronized tracking module is made up of the first frequency divider and frequency synthesis loop being connected with each other, first frequency dividing
Device is for the rectified signal after receiving pulse stretching and carries out Fractional-N frequency, obtains Fractional-N frequency signal；The frequency synthesis loop
Phase discriminator, low pass screening wave filter, loop filter, voltage controlled oscillator and the second frequency divider being sequentially connected including closed loop；Institute
The first input end for stating phase discriminator is connected with the output end of first frequency divider, the second input of the phase discriminator with it is described
The output end of second frequency divider is connected, and the phase discriminator is used to believe the output of the Fractional-N frequency signal and second frequency divider
Number compare, obtain phase difference spectrum signal, and export to the low pass and screen wave filter；The low pass screening wave filter is used for
Phase signal is obtained from the phase difference spectrum signal, and is exported to the loop filter；The loop filter is used
In the voltage for obtaining the phase signal, and export to the voltage controlled oscillator；The voltage controlled oscillator is used for from the phase
The output signal of the frequency synthesis loop, and the first output for passing through the voltage controlled oscillator are obtained in the voltage of potentiometer signal
End is exported to the level switch module；Second output end phase of the input of second frequency divider and the voltage controlled oscillator
Even, for carrying out M frequency dividings to the output signal of the frequency synthesis loop, M fractional frequency signals is obtained and are exported to the phase discriminator
The second input；Wherein N, M are positive integer；
The level switch module includes the level translator and level transmitter being connected with each other；The level translator
Input is connected with the first output end of the voltage controlled oscillator, for by the level of the output signal of the frequency synthesis loop
Type is converted into fiduciary level type, and exports to the level transmitter；The level transmitter is used to be converted into standard
The output signal of the frequency synthesis loop of multilevel type is sent to upper main frame.
The signal detection module also includes narrow band filter；The input of the narrow band filter with it is described
Second output end of triode peak detector is connected, and for obtaining the single-frequency components signal in the rectified signal, and exports
To the second input of the automatic gain controller；The automatic gain controller is used to pass through the single-frequency components signal
The multiplication factor of preamplifier output signal described in strength control.
The signal detection module also includes linear amplifier；The input of the linear amplifier and the narrow-band bandpass
The output end of wave filter is connected, the output end of the linear amplifier and the second input phase of the automatic gain controller
Even, the voltage that the linear amplifier is used to control the single-frequency components signal is with the output signal of the automatic gain controller
Voltage it is equal.
The narrow band filter is cut-off frequency 10.7MHz ceramic single-frequency wave filter.
The reception antenna is plane dipole wideband omnidirectional antenna.
The preamplifier is multiplication factor 30dB low-noise amplifier.
The fiduciary level type is RS-232 multilevel types.
The loop filter is passive proportion integration filter.
First frequency divider is step-by-step counting frequency divider, and N values are adjustable；Second frequency divider divides for step-by-step counting
Device, and M values are adjustable.
The frequency synthesis loop also includes charge pump；The input of the charge pump and low pass screening wave filter
Output end is connected, and the first output end of the charge pump is connected with the electric capacity of the passive proportion integration filter, the electric charge
Second output end of pump is connected with the signal input part of the passive proportion integration filter, and it is the nothing that the charge pump, which is used for,
The electric capacity charging of source proportional-integral filter.
Compared with prior art, the beneficial effects of the utility model are：
Automatic gain controller is set after the preamplifier of signal detection module, effectively controls multiplication factor, is solved
In multi-path environment the problem of pulse inter-frame-interference, the stable reception signal of signal detection module is advantageously ensured that, reduces far and near effect
The influence answered, while be advantageous to the triode peak envelop detection of follow-up link, improve peak detection performance.In signal detection mould
Set in block and compare widening circuit, the signal after smooth triode peak detection, meet that the input signal of synchronized tracking module will
Ask, effectively reduce the sample frequency of upper host data processing and the requirement of Timed Recovery clock accuracy.
The Phase Tracking and narrow-band filtering characteristic of phaselocked loop are used in frequency synthesis loop, to the pulse signal detected
Tracking is synchronized, reduces the position error as caused by phase jitter.Low pass is set to sieve between phase discriminator and loop filter
Selecting filter, secondary filter structure is formed with loop filter, high-frequency noise is effectively filtered out, accurately obtains phase signal.
First frequency divider is set before frequency synthesis loop, puies forward high-frequency changeability, control is more accurate.
Level switch module is made up of the level translator and level transmitter being connected with each other, by the defeated of frequency synthesis loop
The multilevel type for going out signal is converted into fiduciary level type, and is sent by level transmitter to upper main frame, realizes front end signal
The independent of process part, as needed selection are adapted to the fiduciary level type of upper main frame, realize being total to for xenogenesis circuit network
Enjoying property, innovative usage Microcomputer Interfacing Technology.
The requirement of the Signal-to-Noise from indoor moving terminal is greatly lowered in the utility model, have it is simple in construction,
The characteristics of strong adaptability and high reliability, there are good mobile communication production, teaching ＆ research value and market prospects.
Brief description of the drawings
Fig. 1 is system structure diagram of the present utility model；
Fig. 2 is the synchronized tracking function structure chart using passive proportion integration filter；
Fig. 3 is the synchronized tracking function structure chart using active proportional-integral filter；
Fig. 4 is triode peak detector circuit structure diagram；
Fig. 5 is passive proportion integration filter schematic diagram；
Fig. 6 is automatic gain controller schematic diagram；
Fig. 7 is linear amplifier schematic diagram；
Fig. 8 is voltage controlled oscillator schematic diagram；
Fig. 9 is phase discriminator schematic diagram；
In figure：1. reception antenna, 2. preamplifiers, 3. automatic gain controllers, 4. triode peak detectors, 5. ratios
Compared with stretcher, 6. narrow band filters, 7. first frequency dividers, 8. phase discriminators, 9. low passes screening wave filter, 10. loop filterings
Device, 11. voltage controlled oscillators, 12. second frequency dividers, 13. level translators, 14. level transmitters, 15. charge pumps, 16. is linear
Amplifier.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is not as to restriction of the present utility model.
Embodiment 1：
The present embodiment includes signal detection module, synchronized tracking module and the level switch module being sequentially connected, and room
Interior mobile terminal and upper main frame, as shown in Figure 1.Indoor moving terminal by effective pulse width is 2ns, repetition rate is
10.7MHz pulse ultra-broad band IR-UWB signal transmitters realize that upper main frame is real by digital gate array FPGA BBPs
It is existing.
Signal detection module include be sequentially connected reception antenna 1, preamplifier 2, automatic gain controller 3, three poles
Stretcher 5 compared with of pipe peak detector 4.Reception antenna 1 uses printing board PCB plane dipole wideband omnidirectional antenna；
Preamplifier 2 selects the UWB low-noise amplifiers of Chengdu matt electronics production, and the wherein passband of the wave filter is 50MHz-
1.2GHz, gain (multiplication factor) are 30dB, noise coefficient 1.5.Automatic gain controller 3 is using Analog companies
AD8368, as shown in Figure 6, the first input end of automatic gain controller 3 are connected with the output end of preamplifier 2；Three poles
Pipe peak detector 4 uses the SiGe RF transistors BFP650 and its peripheral circuit of Infineon Technologies Stock Co., Ltd, such as the institute of accompanying drawing 4
Show, the first output end of triode peak detector 4 input of stretcher 5 compared with is connected；Compare stretcher 5 and use Linear
The LT1720 chips of company.Signal detection module also includes narrow band filter 6 and linear amplifier 16, as shown in Figure 1：
The input of narrow band filter 6 is connected with the second output end of triode peak detector 4, narrow band filter 6
Output end is connected with the input of linear amplifier 16, the output end of linear amplifier 16 and the second of automatic gain controller 3
Input is connected.Narrow band filter 6 uses cut-off frequency 10.7MHz ceramic single-frequency wave filter；Linear amplifier 16 is adopted
With the integrated computation amplification chip AD9631 of Analog companies, as shown in Figure 7.
Referring to accompanying drawing 1 and accompanying drawing 3, synchronized tracking module is by the first frequency divider 7 and frequency synthesis loop group that are connected with each other
Include phase discriminator 8, low pass screening wave filter 9, loop filter 10 that closed loop is sequentially connected into, frequency synthesis loop, voltage-controlled shake
Swing the frequency divider 12 of device 11 and second.Wherein the output end of the second frequency divider 12 is connected with the second input of phase discriminator 8, phase discriminator
8 first input end is connected with the output end of the first frequency divider 7, and phase discriminator 8 is reflected using the ADF4001 digital frequency discriminations of ADI companies
Phase device, as shown in Figure 9.Low pass screening wave filter 9 uses the AD8606 integrated digital low-pass filter amplifiers of ADI companies.Ring
Path filter 10 uses active proportional-integral filter, as shown in Figure 3.Voltage controlled oscillator 11 is using Motorola Inc.
MC12148, as shown in Figure 8.The input of second frequency divider 12 is connected with the second output end of voltage controlled oscillator 11, voltage-controlled to shake
The first output end of device 11 is swung with the level translator 13 in level switch module to be connected.First frequency divider 7 and the second frequency divider
12 use the step-by-step counting frequency divider 74194 of Transistor-Transistor Logic level type, and the first frequency divider 7 is Fractional-N frequency, and the second frequency divider 12 is M
Frequency dividing, N, M value is adjustable (N is set in the present embodiment be 6, M 9).
Level switch module includes the level translator 13 and level transmitter 14 being connected with each other；Level translator 13 uses
BTL232RS-232 bauds rate converter (fiduciary level type is RS-232 multilevel types), the input of level translator 13 with
First output end of voltage controlled oscillator 11 is connected；Level transmitter uses the ADV7525 power down signal transmitters of ADI companies.
The input of level transmitter 14 is connected with the output end of level translator 13, the signal transmitting terminal (signal of level transmitter 14
Output end) with upper main frame establish connection-oriented virtual circuit data communication mode.
The present embodiment course of work is as follows：
Indoor moving terminal produces periodic narrow pulse signal, amplitude 900mV.The reception antenna of signal detection module
1 receives the pulse signal from indoor moving terminal, and exports to preamplifier 2；Preamplifier 2 is to indoor moving terminal
Signal be amplified, and export to automatic gain controller 3.Automatic gain controller 3 controls the output signal of preamplifier 2
Multiplication factor, and export to triode peak detector 4.Output of the triode peak detector 4 to automatic gain controller 3
Signal carries out peak envelop detection and obtains rectified signal, and by the first output end of triode peak detector 4 export to than
Compared with stretcher 5.Compare stretcher 5 and filter out multipath noise in rectified signal, carried out to filtering out the rectified signal after multipath noise
Pulse stretching, and the rectified signal after pulse stretching is exported to the first frequency divider 7 of synchronized tracking module.Narrow-band bandpass filters
Device 6 obtains the single-frequency components signal in rectified signal, and exports to linear amplifier 16；Linear amplifier 16 believes single-frequency components
Number output and controls the voltage of single-frequency components signal and automatic gain controller 3 to the second input of automatic gain controller 3
Output signal voltage it is equal；Automatic gain controller 3 is exported by the strength control preamplifier 2 of single-frequency components signal
The multiplication factor of signal.
The first frequency divider 7 in synchronized tracking module receives the rectified signal after pulse stretching and carries out 6 frequency dividings, obtains 6
Fractional frequency signal；Phase discriminator 8 compares 6 fractional frequency signals with the output signal of the second frequency divider 12, obtains phase difference spectrum signal,
And export to low pass and screen wave filter 9.Low pass screening wave filter 9 obtains phase signal from phase difference spectrum signal, and defeated
Go out to loop filter 10；Loop filter 10 obtains the voltage of phase signal, and exports to voltage controlled oscillator 11.It is voltage-controlled to shake
The output signal that device 11 obtains frequency synthesis loop from the voltage of phase signal is swung, and passes through the first of voltage controlled oscillator 11
Output end is exported to the level translator 13 of level switch module.Second frequency divider 12 enters to the output signal of frequency synthesis loop
Row 9 divides, and obtains 9 fractional frequency signals and exports to the second input of phase discriminator 8.
The multilevel type of the output signal of frequency synthesis loop is converted into RS- by the level translator 13 of level switch module
232 multilevel types, and export to level transmitter 14；Level transmitter 14 is converted into the frequency synthesis of RS-232 multilevel types
The output signal of loop is sent to upper main frame.
The present embodiment sets the ceramic single-frequency wave filter that narrow band filter is cut-off frequency 10.7MHz, realizes single-frequency
Superfine narrow-band filtering, enhancing automatic growth control AGC effect.
The present embodiment sets linear amplifier, and the differential loss for avoiding narrow band filter is made to automatic growth control effect
Into influence.
The present embodiment reception antenna is plane dipole wideband omnidirectional antenna, in combination with 30dB low-noise amplifiers, is kept away
Exempt from indoor moving terminal signaling to be submerged among noise, so as to improve the locating effect of mobile terminal.
The present embodiment uses RS-232 level translator, preferably compatible using Digital Logic Base-Band Processing cores such as FPGA
The upper main frame of piece.
First frequency divider and the second frequency divider of the present embodiment use adjustable pulse frequency-dividing counter, the integrated electricity of middle and small scale
Road is realized, simple in construction, realizes that multi-frequency integrates.
Embodiment 2：
The present embodiment includes signal detection module, synchronized tracking module and the level switch module being sequentially connected, and room
Interior mobile terminal and upper main frame, as shown in Figure 1.Indoor moving terminal by effective pulse width is 2ns, repetition rate is
10.7MHz pulse ultra-broad band IR-UWB signal transmitters realize that upper main frame is realized by embedded BBP ARM.
Referring to accompanying drawing 1, signal detection module includes the reception antenna 1, preamplifier 2, automatic gain control being sequentially connected
Device 3 processed, stretcher 5 compared with of triode peak detector 4.Reception antenna 1 is using printing board PCB plane dipole broadband
Omnidirectional antenna；Preamplifier 2 selects the passband of the UWB low-noise amplifiers, the wherein wave filter of Chengdu matt electronics production
For 50MHz-1.2GHz, gain (multiplication factor) is 30dB, noise coefficient 1.5.Automatic gain controller 3 is public using Analog
The AD8368 of department, as shown in Figure 6, the first input end of automatic gain controller 3 are connected with the output end of preamplifier 2；
Triode peak detector 4 uses the SiGe RF transistors BFP650 and its peripheral circuit of Infineon Technologies Stock Co., Ltd, such as attached
Shown in Fig. 4, the first output end of triode peak detector 4 input of stretcher 5 compared with is connected；Compare stretcher 5 to adopt
With the LT1720 chips of Linear Tech.Signal detection module also includes narrow band filter 6 and linear amplifier 16, such as accompanying drawing
Shown in 1：The input of narrow band filter 6 is connected with the second output end of triode peak detector 4, narrow-band bandpass filtering
The output end of device 6 is connected with the input of linear amplifier 16, output end and the automatic gain controller 3 of linear amplifier 16
Second input is connected.Narrow band filter 6 uses cut-off frequency 10.7MHz ceramic single-frequency wave filter；Linear amplifier
16 use the integrated computation amplification chip AD9631 of Analog companies, as shown in Figure 7.
Referring to accompanying drawing 2, synchronized tracking module is made up of the first frequency divider 7 and frequency synthesis loop being connected with each other, frequency
Comprehensive loop includes the phase discriminator 8 that closed loop is sequentially connected, low pass screening wave filter 9, charge pump 15, loop filter 10, voltage-controlled
The frequency divider 12 of oscillator 11 and second.Wherein the output end of the second frequency divider 12 is connected with the second input of phase discriminator 8, phase demodulation
The first input end of device 8 is connected with the output end of the first frequency divider 7, and phase discriminator 8 uses the ADF4001 digital frequency discriminations of ADI companies
Phase discriminator, as shown in Figure 9.Low pass screening wave filter 9 uses the AD8606 integrated digital low-pass filter amplifiers of ADI companies.
Charge pump 15 is using lifting/lowering pressure type charge pump MAX1759；Loop filter 10 uses three rank passive proportion integration filters, such as
Shown in accompanying drawing 5；The input of charge pump 15 is connected with the output end of low pass screening wave filter 9, the first output end of charge pump 15
It is connected with the electric capacity of passive proportion integration filter, the second output end of charge pump 15 and the signal of passive proportion integration filter
Input is connected.Voltage controlled oscillator 11 uses the MC12148 of Motorola Inc., as shown in Figure 8.Second frequency divider 12 it is defeated
Enter end with the second output end of voltage controlled oscillator 11 to be connected, in the first output end and level switch module of voltage controlled oscillator 11
Level translator 13 is connected.First frequency divider 7 and the second frequency divider 12 use the step-by-step counting frequency divider of Transistor-Transistor Logic level type
74194, and the first frequency divider 7 is Fractional-N frequency, the second frequency divider 12 is M frequency dividings, and N, M value is adjustable (to set the N to be in the present embodiment
6th, M 9).
Level switch module includes the level translator 13 and level transmitter 14 being connected with each other；Level translator 13 uses
BTL485RS-485 bauds rate converter (fiduciary level type is RS-485 multilevel types), the input of level translator 13 with
First output end of voltage controlled oscillator 11 is connected；Level transmitter uses the ADV7525 power down signal transmitters of ADI companies.
The input of level transmitter 14 is connected with the output end of level translator 13, the signal transmitting terminal (signal of level transmitter 14
Output end) with upper main frame establish connection-oriented virtual circuit data communication mode.
The present embodiment course of work is as follows：
Indoor moving terminal produces periodic narrow pulse signal, amplitude 900mV.The reception antenna of signal detection module
1 receives the pulse signal from indoor moving terminal, and exports to preamplifier 2；Preamplifier 2 is to indoor moving terminal
Signal be amplified, and export to automatic gain controller 3.Automatic gain controller 3 controls the output signal of preamplifier 2
Multiplication factor, and export to triode peak detector 4.Output of the triode peak detector 4 to automatic gain controller 3
Signal carries out peak envelop detection and obtains rectified signal, and by the first output end of triode peak detector 4 export to than
Compared with stretcher 5.Compare stretcher 5 and filter out multipath noise in rectified signal, carried out to filtering out the rectified signal after multipath noise
Pulse stretching, and the rectified signal after pulse stretching is exported to the first frequency divider 7 of synchronized tracking module.Narrow-band bandpass filters
Device 6 obtains the single-frequency components signal in rectified signal, and exports to linear amplifier 16；Linear amplifier 16 believes single-frequency components
Number output and controls the voltage of single-frequency components signal and automatic gain controller 3 to the second input of automatic gain controller 3
Output signal voltage it is equal；Automatic gain controller 3 is exported by the strength control preamplifier 2 of single-frequency components signal
The multiplication factor of signal.
The first frequency divider 7 in synchronized tracking module receives the rectified signal after pulse stretching and carries out 6 frequency dividings, obtains 6
Fractional frequency signal；Phase discriminator 8 compares 6 fractional frequency signals with the output signal of the second frequency divider 12, obtains phase difference spectrum signal,
And export to low pass and screen wave filter 9.Low pass screening wave filter 9 obtains phase signal from phase difference spectrum signal, and defeated
Go out to charge pump 15；The one side of charge pump 15 charges for the electric capacity of passive proportion integration filter (loop filter 10), another
Aspect exports phase signal to the signal input part of loop filter 10.Loop filter 10 obtains the electricity of phase signal
Pressure, and export to voltage controlled oscillator 11.Voltage controlled oscillator 11 obtains the defeated of frequency synthesis loop from the voltage of phase signal
Go out signal, and exported by the first output end of voltage controlled oscillator 11 to the level translator 13 of level switch module.Second point
Frequency device 12 carries out 9 frequency dividings to the output signal of frequency synthesis loop, obtains 9 fractional frequency signals and exports second defeated to phase discriminator 8
Enter end.
The multilevel type of the output signal of frequency synthesis loop is converted into RS- by the level translator 13 of level switch module
485 multilevel types, and export to level transmitter 14；Level transmitter 14 is converted into the frequency synthesis of RS-485 multilevel types
The output signal of loop is sent to upper main frame.
The present embodiment combination charge pump and passive proportion integration filter, solve to exist in synchronized tracking frequency synthesis loop
Caused by active device the problem of thermal noise, loop tracks performance is improved.
The present embodiment uses RS-485 level translator, preferably compatible using embedded baseband processing chips such as ARM
Upper main frame.
The utility model sets automatic gain controller after the preamplifier of signal detection module, effectively control amplification
Multiple, solve the problems, such as the pulse inter-frame-interference in multi-path environment, advantageously ensure that the stable reception signal of signal detection module, subtract
The influence of small near-far interference, while be advantageous to the triode peak envelop detection of follow-up link, improve peak detection performance.Believing
Set in number detection module and compare widening circuit, the signal after smooth triode peak detection, meet the defeated of synchronized tracking module
Enter semaphore request, effectively reduce the sample frequency of upper host data processing and the requirement of Timed Recovery clock accuracy.
The utility model uses the Phase Tracking and narrow-band filtering characteristic of phaselocked loop in frequency synthesis loop, to detecting
Pulse signal synchronize tracking, reduce the position error as caused by phase jitter.Between phase discriminator and loop filter
Set low pass to screen wave filter, form secondary filter structure with loop filter, effectively filter out high-frequency noise, accurately obtain phase
Difference signal.First frequency divider is set before frequency synthesis loop, puies forward high-frequency changeability, control is more accurate.
The utility model level switch module is made up of the level translator and level transmitter being connected with each other, and frequency is comprehensive
The multilevel type of the output signal on cyclization road is converted into fiduciary level type, and is sent by level transmitter to upper main frame, real
The independent of existing front end signal process part, as needed selection are adapted to the fiduciary level type of upper main frame, realize xenogenesis electricity
The sharing of road network, innovative usage Microcomputer Interfacing Technology.
The requirement of the Signal-to-Noise from indoor moving terminal is greatly lowered in the utility model, have it is simple in construction,
The characteristics of strong adaptability and high reliability, there are good mobile communication production, teaching ＆ research value and market prospects.
Embodiment described above is only the preferred embodiment to absolutely prove the utility model and being lifted, the utility model
Protection domain not limited to this.The equivalent substitute or change that those skilled in the art are made on the basis of the utility model
Change, within the scope of protection of the utility model.The scope of protection of the utility model is defined by claims.
Claims (10)
1. a kind of ultra-broadband signal for indoor moving terminal positioning receives high-frequency electronic system, it is characterised in that：Including according to
Signal detection module, synchronized tracking module and the level switch module of secondary connection；The signal detection module includes being sequentially connected
Reception antenna, preamplifier, automatic gain controller, triode peak detector stretcher compared with；
The reception antenna is used to receive the signal from indoor moving terminal, and exports to the preamplifier；Before described
Amplifier is put to be used to be amplified the signal of the indoor moving terminal；The first input end of the automatic gain controller with
The output end of the preamplifier is connected, and for controlling the multiplication factor of the preamplifier output signal, and exports extremely
The triode peak detector；The triode peak detector is used to enter the output signal of the automatic gain controller
Row peak envelop detection obtains rectified signal, and is exported by the first output end of the triode peak detector to the ratio
Compared with stretcher；The relatively stretcher is used to filter out the multipath noise in the rectified signal, is additionally operable to filtering out multipath noise
The rectified signal afterwards carries out pulse stretching, and the rectified signal after pulse stretching is exported to the synchronized tracking mould
Block；
The synchronized tracking module is made up of the first frequency divider and frequency synthesis loop being connected with each other, and first frequency divider is used
The rectified signal after pulse stretching is received simultaneously carries out Fractional-N frequency, obtains Fractional-N frequency signal；The frequency synthesis loop includes
Phase discriminator, low pass screening wave filter, loop filter, voltage controlled oscillator and the second frequency divider that closed loop is sequentially connected；The mirror
The first input end of phase device is connected with the output end of first frequency divider, the second input of the phase discriminator and described second
The output end of frequency divider is connected, and the phase discriminator is used for the output signal phase of the Fractional-N frequency signal and second frequency divider
Compare, obtain phase difference spectrum signal, and export to the low pass and screen wave filter；The low pass screening wave filter is used for from institute
State and phase signal is obtained in phase difference spectrum signal, and export to the loop filter；The loop filter is used to obtain
The voltage of the phase signal is obtained, and is exported to the voltage controlled oscillator；The voltage controlled oscillator is used for from the phase difference
The output signal of the frequency synthesis loop is obtained in the voltage of signal, and it is defeated by the first output end of the voltage controlled oscillator
Go out to the level switch module；The input of second frequency divider is connected with the second output end of the voltage controlled oscillator,
For carrying out M frequency dividings to the output signal of the frequency synthesis loop, obtain M fractional frequency signals and export to the of the phase discriminator
Two inputs；Wherein N, M are positive integer；
The level switch module includes the level translator and level transmitter being connected with each other；The input of the level translator
End is connected with the first output end of the voltage controlled oscillator, for by the multilevel type of the output signal of the frequency synthesis loop
Fiduciary level type is converted into, and is exported to the level transmitter；The level transmitter is used to be converted into fiduciary level
The output signal of the frequency synthesis loop of type is sent to upper main frame.
2. the ultra-broadband signal according to claim 1 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：The signal detection module also includes narrow band filter；The input of the narrow band filter and institute
The second output end for stating triode peak detector is connected, for obtaining the single-frequency components signal in the rectified signal, and it is defeated
Go out to the second input of the automatic gain controller；The automatic gain controller is used to pass through the single-frequency components signal
Strength control described in preamplifier output signal multiplication factor.
3. the ultra-broadband signal according to claim 2 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：The signal detection module also includes linear amplifier；The input of the linear amplifier and the arrowband band
The output end of bandpass filter is connected, the output end of the linear amplifier and the second input phase of the automatic gain controller
Even, the voltage that the linear amplifier is used to control the single-frequency components signal is with the output signal of the automatic gain controller
Voltage it is equal.
4. the ultra-broadband signal according to claim 3 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：The narrow band filter is cut-off frequency 10.7MHz ceramic single-frequency wave filter.
5. the ultra-broadband signal according to claim 1 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：The reception antenna is plane dipole wideband omnidirectional antenna.
6. the ultra-broadband signal according to claim 1 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：The preamplifier is multiplication factor 30dB low-noise amplifier.
7. the ultra-broadband signal according to claim 1 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：The fiduciary level type is RS-232 multilevel types.
8. the ultra-broadband signal according to claim 1 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：The loop filter is passive proportion integration filter.
9. the ultra-broadband signal according to claim 8 for indoor moving terminal positioning receives high-frequency electronic system, its
It is characterised by：First frequency divider is step-by-step counting frequency divider, and N values are adjustable；Second frequency divider is step-by-step counting point
Frequency device, and M values are adjustable.
10. the ultra-broadband signal for indoor moving terminal positioning according to claim 8 or claim 9 receives high-frequency electrical subsystem
System, it is characterised in that：The frequency synthesis loop also includes charge pump；The input of the charge pump is filtered with low pass screening
The output end of ripple device is connected, and the first output end of the charge pump is connected with the electric capacity of the passive proportion integration filter, institute
The second output end for stating charge pump is connected with the signal input part of the passive proportion integration filter, and the charge pump is for being
The electric capacity charging of the passive proportion integration filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720772045.XU CN206977401U (en) | 2017-06-28 | 2017-06-28 | Ultra-broadband signal for indoor moving terminal positioning receives high-frequency electronic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720772045.XU CN206977401U (en) | 2017-06-28 | 2017-06-28 | Ultra-broadband signal for indoor moving terminal positioning receives high-frequency electronic system |
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| CN206977401U true CN206977401U (en) | 2018-02-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738872A (en) * | 2019-01-11 | 2019-05-10 | 上海英恒电子有限公司 | A kind of radar Cochannel interference method and device |
| CN110350932A (en) * | 2019-07-03 | 2019-10-18 | 南京大学 | A kind of high-frequency wideband receiver and signal processing method |
-
2017
- 2017-06-28 CN CN201720772045.XU patent/CN206977401U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738872A (en) * | 2019-01-11 | 2019-05-10 | 上海英恒电子有限公司 | A kind of radar Cochannel interference method and device |
| CN110350932A (en) * | 2019-07-03 | 2019-10-18 | 南京大学 | A kind of high-frequency wideband receiver and signal processing method |
| CN110350932B (en) * | 2019-07-03 | 2021-06-18 | 南京大学 | High-frequency broadband receiver and signal processing method |
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