CN106571840B - A kind of distance measuring signal and voice signal phase-locked receive and its demodulation method - Google Patents
A kind of distance measuring signal and voice signal phase-locked receive and its demodulation method Download PDFInfo
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- CN106571840B CN106571840B CN201610996140.8A CN201610996140A CN106571840B CN 106571840 B CN106571840 B CN 106571840B CN 201610996140 A CN201610996140 A CN 201610996140A CN 106571840 B CN106571840 B CN 106571840B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/0802—Details of the phase-locked loop the loop being adapted for reducing power consumption
Abstract
A kind of distance measuring signal and voice signal phase-locked receive, comprising: phase-locked loop, distance measuring signal filter, voice signal filter, squelch switch and switch controller；First output end of phase-locked loop and the first input end of squelch switch connect, the output end of squelch switch is connect with the input terminal of distance measuring signal filter and voice signal filter respectively, the second output terminal of phase-locked loop and the input terminal of switch controller connect, and the output end of switch controller and the second input terminal of squelch switch connect；Switch controller is used to open squelch switch according to the locking of phase-locked loop, and disconnects squelch switch according to the losing lock of phase-locked loop；When squelch switch is opened, distance measuring signal and voice signal are exported.The receiver can interfere with each other to avoid ranging channel/speech channel.It is disconnected by control ranging branch/speech branch, the noise from receiving channel will not enter ranging channel to deteriorate downstream spectrum, will not enter speech channel to interfere the normal work of follow-up signal processing circuit.
Description
Technical field
The present invention relates to manned space flight TTC&T Technology fields, and in particular to a kind of distance measuring signal and voice signal locking phase
Receiver and its demodulation method.
Background technique
Unified carrier TT & C system is common a kind of TT & C architecture in spacecraft telemetry communication subsystem.The system utilizes
Multiple subcarrier signals and distance measuring signal phase modulation are modulated on a unified carrier wave by frequency multiplexing technique.The manned boat in China
Each spacecraft of its engineering (airship, space station etc.) is also to use unified carrier TT & C system.Due to the particularity of manned space flight,
In uplink measurement and control signal, other than distance measuring signal and remote signal, it is also necessary to modulate voice signal.
Unified carrier TT & C system demodulates uplink signal using phase-locked receive, when phase-locked receive locks uplink
When signal, phase-locked receive demodulates distance measuring signal and voice signal by coherent demodulation method.But due to distance measuring signal and speech
Relatively, this has resulted in the problem of interfering with each other between two channels of ranging and speech to the frequency band of signal: being ranging first
Interference of the signal to speech channel: for manned spacecraft, after uplink measurement and control signal has modulated voice signal, total modulation degree
Total modulation degree than general spacecraft uplink measurement and control signal is bigger, and demodulator work is closing on nonlinear area, causes ranging
Signal has biggish harmonic wave, and distance measuring signal and its harmonic wave will enter speech channel to interfere voice signal；Followed by speech is believed
Number and its harmonic wave emission spectrum entered by the forwarding in ranging channel, form the clutter of emission spectrum and interfere adjacent frequency bands.
When the unlocked uplink signal of phase-locked receive, a large amount of noise energy by receiving channel enter ranging channel and
Speech channel.Noise in ranging channel can be forwarded to downstream spectrum, cause the depression effect of descending power, influence telemetry communication
The normal work of subsystem.And it will cause the erroneous judgements of follow-up signal processing circuit for the noise in speech channel.
Summary of the invention
The problem of demodulating uplink signal process for phase-locked receive, the application provide a kind of distance measuring signal and words
Sound signal phase-locked receive and its demodulation method.
According in a first aspect, providing a kind of uplink signal phase-locked receive, including phase-locked loop, ranging in a kind of embodiment
Traffic filter, voice signal filter, squelch switch and switch controller；
The first input end of first output end of phase-locked loop and squelch switch connects, the output end of squelch switch respectively with
Distance measuring signal filter is connected with the input terminal that voice signal filters, the second output terminal of phase-locked loop and switch controller it is defeated
Enter end connection, the output end of switch controller and the second input terminal of squelch switch connect；
Switch controller is used to open the squelch switch according to the lock state of phase-locked loop, and according to phase-locked loop
Out-of-lock state disconnects squelch switch；
When squelch switch is opened, distance measuring signal filter is used to export the distance measuring signal in unified carrier signal；Speech
Traffic filter is used to export the voice signal in unified carrier signal.
It further include forming intermediate-freuqncy signal for carrying out it received uplink signal down coversion to penetrate in a kind of embodiment
Frequency front end, the output end of radio-frequency front-end are connect with the input terminal of phase-locked loop and switch controller respectively.
In a kind of embodiment, phase-locked loop includes phase discriminator, loop filter and voltage controlled crystal oscillator；
The input terminal of the output end of phase discriminator and loop filter connects, the output end of loop filter and voltage controlled crystal oscillator
Input terminal connection, the output end of voltage controlled crystal oscillator and the input terminal of phase discriminator connect；
The output end of phase discriminator is also attached to the first input end of squelch switch, and the output end of voltage controlled crystal oscillator is also attached to out
Close the input terminal of controller.
In a kind of embodiment, switch controller includes multiplier, phase shifter and comparator；
The input terminal of phase shifter is connected to the output end of voltage controlled crystal oscillator, and the output end of phase shifter is connected to the first of multiplier
Input terminal, the second input terminal of multiplier are connected to the output end of radio-frequency front-end, and the output end of multiplier is connected to comparator
The output end of input terminal, comparator is connected to the control terminal of squelch switch；
Multiplier for export with the working condition voltage of the phaselocked loop, comparator for compare working condition voltage with
Reference voltage is switched on or off squelch switch according to comparison result.
In a kind of embodiment, distance measuring signal filter includes several grades of low-pass active filters, voice signal filter packet
Include several grades of active band pass filters.
According to second aspect, the demodulation side of a kind of distance measuring signal and voice signal phase-locked receive is provided in a kind of embodiment
Method, phase-locked receive include phase-locked loop, distance measuring signal filter, voice signal filter, squelch switch and switch controller,
Comprising steps of
The processing of uplink measurement and control signal:, which receiving radiofrequency signal by radio frequency reception channel, and down coversion is carried out to it forms intermediate frequency
Signal；
Intermediate-freuqncy signal demodulation: when phase-locked loop is in the lock state, coherent demodulation is carried out to intermediate-freuqncy signal；
Ranging, voice signal extract: when phaselocked loop is lock state, switch controller opens squelch switch, ranging letter
Number filter extracts the distance measuring signal after coherent demodulation and voice signal filter extracts the voice signal after coherent demodulation.
In a kind of embodiment, phaselocked loop is in the lock state, specifically: the load of phase-locked loop output signal and intermediate-freuqncy signal
Wave phase is relevant.
In a kind of embodiment, ranging, voice signal extract comprising steps of
The phase of the output signal of phase-locked loop is subjected to 90 ° of phase shifts, and the reference signal as switch controller；
The working condition voltage that phase-locked loop is calculated according to reference signal；
Locking instructed voltage is converted by working condition voltage；
Squelch switch is switched on or off according to locking instructed voltage；
When squelch switch is opened, distance measuring signal filter extracts the distance measuring signal and voice signal filter after coherent demodulation
Voice signal after extracting coherent demodulation.
According to the phase-locked receive demodulation method of above-described embodiment, due to passing through the ranging branch Lu Shangzeng in phase-locked receive
Distance measuring signal filter is added to carry out the higher voice signal of rejection frequency, it is logical by ranging so as to avoid voice signal and its harmonic wave
The forwarding in road and enter emission spectrum, form the clutter of emission spectrum；And by increasing voice signal filtering on speech branch road
Device filters out the lower distance measuring signal of speech branch road frequency and its harmonic component, so as to avoid distance measuring signal and its harmonic wave into
Enter speech channel interference voice signal；When the unlocked uplink signal of phase-locked receive, switch controller turns off squelch switch, makes
The demodulation output of phase-locked loop and ranging branch/speech branch disconnect, and the noise from receiving channel will not enter ranging channel
To deteriorate downstream spectrum, speech channel will not be entered to interfere the normal work of follow-up signal processing circuit.
Detailed description of the invention
Fig. 1 is the uplink signal phase-locked receive electrical block diagram of embodiment one；
Fig. 2 is the electrical block diagram of the distance measuring signal filter of embodiment one；
Fig. 3 is the local circuit schematic diagram of the distance measuring signal filter of embodiment one；
Fig. 4 is the electrical block diagram of the voice signal filter of embodiment one；
Fig. 5 is the local circuit schematic diagram of the voice signal filter of embodiment one；
Fig. 6 is the flow chart of the uplink signal phase-locked receive demodulation method of embodiment two.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.
Embodiment one:
This example provides a kind of uplink signal phase-locked receive, and structural schematic diagram is as shown in Figure 1, including phase-locked loop 1, surveying
Away from traffic filter 2, voice signal filter 3, squelch switch 4 and switch controller 5.
Wherein, the first output end of phase-locked loop 1 is connect with the first input end of squelch switch 4, the output of squelch switch 4
End connect respectively with the input terminal of distance measuring signal filter 2 and voice signal filter 3, the second output terminal of phase-locked loop 1 and
The input terminal of switch controller 5 connects, and the output end of switch controller 5 is connect with the second input terminal of squelch switch 4；Switch control
Device 5 processed is used to open squelch switch 4 according to the lock state of phase-locked loop, and quiet according to the disconnection of the out-of-lock state of phase-locked loop 1
It makes an uproar switch 4；When squelch switch 4 is opened, distance measuring signal filter 2 is used to export the distance measuring signal in uplink signal；Speech letter
Number filter 3 is used to export the voice signal in uplink signal.
Basic principle based on wireless communication, uplink signal are propagated in the form of an electromagnetic wave in radio band, phase-locked receive
After receiving uplink signal, only dropping to Mid Frequency could be demodulated, so, the phase-locked receive of this example further includes radio-frequency front-end 6,
The output end of radio-frequency front-end 6 is connect with the input terminal of phase-locked loop 1 and switch controller 5 respectively, and radio-frequency front-end 6 is used for reception
Uplink signal it is carried out down coversion formed intermediate-freuqncy signal, e.g., the uplink signal input radio frequency front end 6 of 2GHz, then before radio frequency
End 6 can export the intermediate frequency segment signal of 9MHz.
Specifically, phase-locked loop 1 includes phase discriminator 11, loop filter 12 and voltage controlled crystal oscillator 13；The output of phase discriminator 11
End is connect with the input terminal of loop filter 12, and the output end of loop filter 12 is connect with the input terminal of voltage controlled crystal oscillator 13, pressure
The output end of control crystal oscillator 13 is connect with the input terminal of phase discriminator 11, so, phase discriminator 11, loop filter 12 and voltage controlled crystal oscillator 13
Constitute phase-locked loop 1.
Phase-locked loop 1 in uplink signal distance measuring signal and voice signal carry out coherent demodulation, specifically, phase discriminator 11
For the carrier wave of the output signal of voltage controlled crystal oscillator 13 and uplink signal to be carried out phase bit comparison, reflection two paths of signals phase difference is generated
Comparison voltage；Comparison voltage is changed into the control voltage of voltage controlled crystal oscillator 13 by integral way by loop filter 12.Wherein,
The loop bandwidth of loop filter 12 is set as 2kHz, then can all filter out the distance measuring signal of the branch road and voice signal；Pressure
Control crystal oscillator 13 generates phase discriminator 11 and demodulates required reference signal.Since the phase characteristic of phase discriminator 11 is longitudinal cosine type, work as
Phase-locked loop 1 be in locking working condition when, voltage controlled crystal oscillator 13 export reference signal and uplink signal carrier wave be 90 ° just
Hand over, phase discriminator 11 by uplink signal distance measuring signal and voice signal carry out coherent demodulation.
Further, in order to which when phase-locked loop 1 is in out-of-lock state, switch controller 5 disconnects squelch switch 4, this example
The output end of phase discriminator 11 is also attached to the first input end of squelch switch 4, and the output end of the voltage controlled crystal oscillator 13 of this example is also connected with
In the input terminal of switch controller 5.
Further, switch controller 5 includes multiplier 51, phase shifter 52 and comparator 53；The input terminal of phase shifter 52 connects
It is connected to the output end of voltage controlled crystal oscillator 13, the output end of phase shifter 52 is connected to the first input end of multiplier 51, multiplier 51
Second input terminal is connected to the output end of radio-frequency front-end 6, and the output end of multiplier 51 is connected to the input terminal of comparator 53, compares
The output end of device 53 is connected to the second input terminal of squelch switch 4；Multiplier 51 is used to export the working condition electricity of phase-locked loop 1
Pressure, comparator 53 are switched on or off squelch switch 4 according to comparison result for comparing working condition voltage and reference voltage.
Specifically, phase shifter 52 is used for after output signal 90 ° of phase shifts of progress by voltage controlled crystal oscillator 13 as multiplier 51
Reference signal.Multiplier 51 exports the working condition voltage of locked loop 1, the working condition that comparator 53 exports multiplier 51
Voltage is converted to locking instructed voltage Vs: since uplink signal carrier wave is 90 ° orthogonal with the output signal of voltage controlled crystal oscillator 13,
After 90 ° of phase shifts, if the two-way input signal phase of multiplier 51 is identical, show the working condition of locked loop 1 for locking
State, at this point, multiplier 51 exports a high voltage (+10V), which is greater than the reference voltage Vr=+9V of comparator 53, then
The output voltage of multiplier 51 is converted locking instructed voltage Vs=+5V by comparator 53；Opposite, if the two-way of multiplier 53
Input signal phase is irrelevant, then shows that the working condition of locked loop 1 is out-of-lock state, at this point, multiplier 51 exports one
Low-voltage (+8V), the voltage are less than the reference voltage Vr=+9V of comparator 53, and comparator 53 is by the output voltage of multiplier 51
It is converted into locking instructed voltage Vs=0V.
Squelch switch 4 turns on and off the output of phase discriminator 11 and ranging channel/words under the control of locking instructed voltage Vs
The connection in sound channel, e.g., when locked loop 1 locks uplink signal, locking instructed voltage Vs is+5V, the output of phase discriminator 11
End connection distance measuring signal filter 2 and voice signal filter 3, distance measuring signal filter 2 export distance measuring signal, voice signal filter
Wave device 3 exports voice signal；When 1 unlocked uplink signal of locked loop, locking instructed voltage is 0V, the output of phase discriminator 11
End is disconnected with distance measuring signal filter 2 and voice signal filter 3, the noise from receiving channel will not enter ranging channel and
Speech channel.
Further, distance measuring signal filter 2 is for extracting distance measuring signal, and filters out the voice signal of ranging branch road,
Voice signal filter 3 filters out the distance measuring signal and its harmonic component of speech branch road for extracting voice signal, in order to test
Demonstrate,prove distance measuring signal filter 2 and the respective filtering function of voice signal filter 3, using distance measuring signal as tone signal in this example,
Frequency is 100kHz, then its second harmonic is 200kHz, and the spectral range of voice signal carries out for being 220kHz~280kHz
As described below.
The distance measuring signal filter 2 of this example includes several grades of low-pass active filters, and voice signal filter 3 includes several
Grade active band pass filter, specifically, as shown in Fig. 2, distance measuring signal filter 2 includes six grades of low-pass active filters 21, such as
Shown in Fig. 3, low-pass active filter 21 is by operational amplifier A1, resistance R1, resistance R2, resistance R3, capacitor C1 and capacitor C2 group
At；Wherein, the one end resistance R1 is input signal, and the other end connects R2, R3, C1；The one end resistance R2 connects R1, R3, C1, the other end
Connect the inverting input terminal of operational amplifier A1；The one end resistance R3 connects R1, R2, C1, and it is defeated that the other end connects operational amplifier A1
Outlet；The one end capacitor C1 connects R1, R2, R3, other end ground connection；The one end capacitor C2 connects operational amplifier A1 inverting input terminal,
The other end connects operational amplifier A1 output end.
The resistance value and capacitance of every level-one low-pass active filter 21 are as follows:
The first order: R1=100k Ω, R2=47k Ω, R3=82k Ω, C1=68pF, C2=4.7pF；
The second level: R1=110k Ω, R2=47k Ω, R3=91k Ω, C1=39pF, C2=6.8pF；
The third level: R1=75k Ω, R2=47k Ω, R3=91k Ω, C1=33pF, C2=8.2pF；
The fourth stage: R1=82k Ω, R2=30k Ω, R3=39k Ω, C1=330pF, C2=3.3pF；
Level V: R1=62k Ω, R2=33k Ω, R3=91k Ω, C1=33pF, C2=12pF；
6th grade: R1=62k Ω, R2=39k Ω, R3=91k Ω, C1=33pF, C2=10pF.
After above-mentioned resistance value and capacitance, the three dB bandwidth of distance measuring signal filter 2 is 150kHz, and the ranging of 100kHz is believed
Number can reliably it pass through.Distance measuring signal filter 2 is greater than at 220kHz in frequency inhibits 40dB or more, has effective filtered out ranging
The 220kHz-280kHz voice signal and its harmonic component of branch road；In the case where filter bandwidht and set Out-of-band rejection,
Preferable stability can also be obtained using above-mentioned resistance value and capacitance.
As shown in figure 4, the voice signal filter 3 of this example includes seven grades of active band pass filters 31, as shown in figure 5, band
Source filter 31 is connected with to be made of operational amplifier A2, resistance R4, resistance R5, resistance R6, capacitor C3 and capacitor C4；Wherein, electric
Resistance one end R4 is input signal, and the other end connects C3, C4, R5；The one end resistance R5 connects C3, C4, R4, other end ground connection；Capacitor
The one end C3 connects R4, R5, C4, and the other end connects operational amplifier A2 output end；The one end capacitor C4 connects R4, R5, C3, the other end
Connect the inverting input terminal of operational amplifier A2；The one end resistance R6 connects operational amplifier A2 inverting input terminal, other end connection
Operational amplifier A2 output end.
The resistance value and capacitance of every level-one active band pass filter 31 are as follows:
The first order: R4=9.1k Ω, R5=1k Ω, R6=91k Ω, C3=220pF, C4=22pF；
The second level: R4=7.5k Ω, R5=680 Ω, R6=91k Ω, C3=270pF, C4=27pF；
The third level: R4=7.5k Ω, R5=750 Ω, R6=100k Ω, C3=270pF, C4=27pF；
The fourth stage: R4=6.2k Ω, R5=330 Ω, R6=91k Ω, C3=330pF, C4=33pF；
Level V: R4=4.3k Ω, R5=300 Ω, R6=91k Ω, C3=470pF, C4=47pF；
6th grade: R4=3.3k Ω, R5=36 Ω, R6=91k Ω, C3=1000pF, C4=100pF；
7th grade: R4=1.1k Ω, R5=43 Ω, R6=100k Ω, C3=1200pF, C4=120pF.
After above-mentioned resistance value and capacitance, the centre frequency of voice signal filter 3 is 250kHz, and three dB bandwidth is
80kHz, voice signal can reliably pass through, and voice signal filter 3 is less than at 200kHz in frequency inhibits 20dB or more, frequency
Less than 100dB or more is inhibited at 100kHz, the distance measuring signal and its harmonic component of speech branch road 100kHz have been effective filtered out；
In the case where filter bandwidht and set Out-of-band rejection, preferable stability can also be obtained using above-mentioned resistance value and capacitance.
Therefore, the phase-locked receive of the present embodiment is filtered out by increasing distance measuring signal filter 2 on ranging branch road
The voice signal of 220kHz-280kHz enters hair by the forwarding in ranging channel so as to avoid voice signal and its harmonic wave
Radio-frequency spectrum forms the clutter of emission spectrum；It is filtered out on speech branch road by increasing voice signal filter 3 on speech branch road
The distance measuring signal and its harmonic component of 100kHz enters speech channel interference speech letter so as to avoid distance measuring signal and its harmonic wave
Number；In addition, the demodulation output of phase discriminator 11 and ranging branch/speech branch are disconnected when phase-locked receive unlocked uplink signal
Open, the noise from receiving channel will not enter ranging channel to deteriorating downstream spectrum, will not enter speech channel to
Interfere the normal work of follow-up signal processing circuit.
Embodiment two:
Based on embodiment one, this example provides a kind of demodulation method of uplink signal phase-locked receive, and phase-locked receive includes:
Phase-locked loop, distance measuring signal filter, voice signal filter, squelch switch and switch controller, demodulation method include such as
Lower step, flow chart are as shown in Figure 6.
S100: the processing of uplink measurement and control signal: radiofrequency signal is received by radio frequency reception channel and down coversion shape is carried out to it
At intermediate-freuqncy signal.
Since uplink signal is propagated in the form of an electromagnetic wave in radio band, after phase-locked receive receives uplink signal, only
Dropping to Mid Frequency could demodulate.
S200: when phase-locked loop is in the lock state, coherent demodulation intermediate-freuqncy signal demodulation: is carried out to intermediate-freuqncy signal.
Phase-locked loop is in the lock state the carrier phase coherent for referring to phase-locked loop output signal and intermediate-freuqncy signal；Specifically
Judgment method is: according to the composition of the phase-locked loop of embodiment one, reference signal and uplink that phase discriminator exports voltage controlled crystal oscillator
Signal carries out phase bit comparison, if phase coherence, phase-locked loop is in the lock state；If irrelevant, phase discriminator generates reflection
The comparison voltage of two paths of signals phase difference；Comparison voltage is changed into the control of voltage controlled crystal oscillator by integral way by loop filter
Voltage；Reference signal needed for voltage controlled crystal oscillator generates phase discriminator demodulation；Then, phase discriminator continues whether to compare two paths of signals phase
It is identical.
It further include filtering out voice signal in distance measuring signal respectively and filtering out the ranging in voice signal after step S200
The harmonic signal that signal and distance measuring signal generate specifically filters out process and please refers to distance measuring signal filter in embodiment one
With voice signal filter.
S300: ranging, voice signal extract: when phaselocked loop is lock state, switch controller opens squelch switch, surveys
The distance measuring signal after coherent demodulation is extracted away from traffic filter and voice signal filter extracts the voice signal after coherent demodulation.
This step specifically includes: the phase of the output signal of phase-locked loop is carried out 90 ° of phase shifts, and as switch controller
Reference signal；The working condition voltage of phase-locked loop is calculated according to reference signal；Locking is converted by working condition voltage
Instructed voltage；Squelch switch is switched on or off according to locking instructed voltage；When squelch switch is opened, distance measuring signal filter is extracted
Distance measuring signal and voice signal filter after coherent demodulation extract the voice signal after coherent demodulation.
Wherein, it converts locking instructed voltage for working condition voltage to specifically include: when phase-locked receive locking uplink letter
Number when, multiplier two-way input signal phase coherence, multiplier output voltage be higher than comparator reference voltage, comparator output
Locking instructed voltage is high level；When the unlocked uplink signal of phase-locked receive, multiplier two-way input signal phase not phase
Dry, multiplier output voltage is lower than comparator reference voltage, and the locking instructed voltage of comparator output is low level.
It is switched on or off squelch switch according to locking instructed voltage, specifically: when locking instructed voltage is high level, noise elimination
Switch conduction, phase-locked receive export distance measuring signal and voice signal；When locking instructed voltage is low level, squelch switch is disconnected
It opens, the noise from receiving channel will not enter ranging channel and speech channel.
Therefore, the demodulation method of the present embodiment not only avoids voice signal and its harmonic wave and passes through the forwarding in ranging channel
Into emission spectrum, the clutter of emission spectrum is formed；It also avoids distance measuring signal and its harmonic wave enters speech channel interference speech
Signal；In addition, disconnected by control ranging branch/speech branch, the noise from receiving channel will not enter ranging channel from
And deteriorate downstream spectrum, speech channel will not be entered to interfere the normal work of follow-up signal processing circuit.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (9)
1. a kind of distance measuring signal and voice signal phase-locked receive characterized by comprising phase-locked loop, distance measuring signal filtering
Device, voice signal filter, squelch switch and switch controller；
The phase-locked loop includes phase discriminator, loop filter and voltage controlled crystal oscillator；
The output end of the phase discriminator is connect with the input terminal of the loop filter, the output end of the loop filter and institute
The input terminal connection of voltage controlled crystal oscillator is stated, the output end of the voltage controlled crystal oscillator is connect with the input terminal of the phase discriminator；The phase demodulation
The output end of device is also attached to the first input end of the squelch switch, and the output end of the voltage controlled crystal oscillator is also attached to described open
Close the input terminal of controller；
The output end of the squelch switch is connect with the input terminal of the distance measuring signal filter and voice signal filter respectively,
The output end of the switch controller is connect with the second input terminal of the squelch switch；
The switch controller is used to open the squelch switch according to the lock state of the phase-locked loop, and according to the lock
The out-of-lock state of phase loop disconnects the squelch switch；
When the squelch switch is opened, the distance measuring signal filter is used to export the distance measuring signal in uplink signal；It is described
Voice signal filter is used to export the voice signal in uplink signal.
2. distance measuring signal as described in claim 1 and voice signal phase-locked receive, which is characterized in that further include for docking
The uplink signal of receipts it is carried out down coversion formed intermediate-freuqncy signal radio-frequency front-end, the output end of the radio-frequency front-end respectively with institute
Phase-locked loop is stated to connect with the input terminal of switch controller.
3. distance measuring signal as claimed in claim 2 and voice signal phase-locked receive, which is characterized in that the switch controller
Including multiplier, phase shifter and comparator；
The input terminal of the phase shifter is connected to the output end of the voltage controlled crystal oscillator, and the output end of the phase shifter is connected to described
The first input end of multiplier, the second input terminal of the multiplier are connected to the output end of the radio-frequency front-end, the multiplication
The output end of device is connected to the input terminal of the comparator, and the output end of the comparator is connected to the second of the squelch switch
Input terminal；
The multiplier is used to export the working condition voltage of the phase-locked loop, and the comparator is used for the work shape
State voltage and reference voltage are switched on or off the squelch switch according to comparison result.
4. distance measuring signal as claimed in claim 3 and voice signal phase-locked receive, which is characterized in that the distance measuring signal filter
Wave device includes several grades of low-pass active filters, and the voice signal filter includes several grades of active band pass filters.
5. distance measuring signal as claimed in claim 4 and voice signal phase-locked receive, which is characterized in that the distance measuring signal filter
Wave device includes six grades of low-pass active filters, and the voice signal filter includes seven grades of active band pass filters.
6. a kind of demodulation method of distance measuring signal according to any one of claims 1 to 5 and voice signal phase-locked receive,
Phase-locked receive includes: phase-locked loop, distance measuring signal filter, voice signal filter, squelch switch and switch controller,
It is characterized in that, comprising steps of
The processing of uplink measurement and control signal:, which receiving radiofrequency signal by radio frequency reception channel, and down coversion is carried out to it forms intermediate frequency letter
Number；
Intermediate-freuqncy signal demodulation: when phase-locked loop is in the lock state, coherent demodulation is carried out to the intermediate-freuqncy signal；
Ranging, voice signal extract: when phase-locked loop is lock state, switch controller opens squelch switch, distance measuring signal
Filter extracts the distance measuring signal after coherent demodulation and voice signal filter extracts the voice signal after coherent demodulation.
7. demodulation method as claimed in claim 6, which is characterized in that the phase-locked loop is in the lock state, specifically: institute
State the carrier phase coherent of phase-locked loop output signal and intermediate-freuqncy signal.
8. demodulation method as claimed in claim 7, which is characterized in that further include filtering out respectively after the intermediate-freuqncy signal demodulation
Voice signal in distance measuring signal and filter out the harmonic signal that distance measuring signal and distance measuring signal in voice signal generate.
9. demodulation method as claimed in claim 8, which is characterized in that the ranging, voice signal extract comprising steps of
The phase of the output signal of phase-locked loop is subjected to 90 ° of phase shifts, and the reference signal as switch controller；
The working condition voltage of the phase-locked loop is calculated according to the reference signal；
Locking instructed voltage is converted by the working condition voltage；
The squelch switch is switched on or off according to locking instructed voltage；
When the squelch switch is opened, distance measuring signal filter extracts the distance measuring signal and voice signal filter after coherent demodulation
Voice signal after extracting coherent demodulation.
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| CN202334492U (en) * | 2011-09-28 | 2012-07-11 | 四川九洲电器集团有限责任公司 | Frequency synthesizer |
| CN105978562A (en) * | 2016-05-12 | 2016-09-28 | 中国电子科技集团公司第四十研究所 | Ultra-low phase noise and ultrahigh frequency resolution high-frequency narrowband synthesis source circuit and method |
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| CN102025388B (en) * | 2010-11-12 | 2014-05-21 | 北京航空航天大学 | Emulational USB intermediate frequency responser used for satellite test and control |
| CN104158553B (en) * | 2014-08-28 | 2017-03-08 | 上海航天电子通讯设备研究所 | A kind of phase-locked receive mixing loop |
| CN104601187B (en) * | 2015-02-04 | 2017-07-04 | 上海航天测控通信研究所 | A kind of phase-locked receive of spaceborne automatic switchover gain |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202334492U (en) * | 2011-09-28 | 2012-07-11 | 四川九洲电器集团有限责任公司 | Frequency synthesizer |
| CN105978562A (en) * | 2016-05-12 | 2016-09-28 | 中国电子科技集团公司第四十研究所 | Ultra-low phase noise and ultrahigh frequency resolution high-frequency narrowband synthesis source circuit and method |
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