CN205792593U - BPSK space optical communication receives demodulating system - Google Patents
BPSK space optical communication receives demodulating system Download PDFInfo
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- CN205792593U CN205792593U CN201620666685.8U CN201620666685U CN205792593U CN 205792593 U CN205792593 U CN 205792593U CN 201620666685 U CN201620666685 U CN 201620666685U CN 205792593 U CN205792593 U CN 205792593U
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Abstract
The utility model proposes a kind of BPSK space optical communication and receive demodulating system.The dynamic characteristic of communication link, the characteristic of channel in Satellite Coherent Optical Communication, the spatial light interface of terminal inner device is all the source causing light field mismatch.Light field mismatch ultimately causes the decline of receiving sensitivity, and this is the factor that must take in Satellite Coherent Optical Communication link overall study and the work of receiver study of hardware.This utility model provides a kind of BPSK space optical communication to receive demodulating system, it is characterised in that include that photomodulator, optical mixer unit, balanced detector, phase discriminator, essence follow the tracks of phase-locked loop and frequency coarse tuning circuit.This utility model simple in construction, reasonable in design, traffic rate is high, strong interference immunity.
Description
Technical field
This utility model relates to a kind of BPSK space optical communication and receives demodulating system, belongs to communication technical field.
Background technology
Laser has high coherence, the feature that frequency is high, therefore laser communication relative to microwave communication have band roomy,
The advantage that message transmission rate is high.Laser communication has the communication capacity that may be up to hundreds of Gbps, meets following magnanimity space letter
The demand of breath transmission.In addition, using laser is that transmission medium is set up communication link also to have the angle of divergence little, is difficult to be cut
Obtaining, confidentiality is high, and the beam energy spread is little, it is possible to carries out over distance and effectively transmits, and communication terminal volume is little, quality
Gently, some advantages such as low in energy consumption, be highly suitable as Satellite Communications Payload.Therefore, the advantage of laser space communication makes
It becomes the choosing of certainty of future space information network information transmission, and world's major technique such as China, European Union, the U.S., Japan is big
State all pays close attention, and has carried out the lasting research of many decades, is successfully authenticated based on deep space probe, satellite, closes on sky
Between the FreeSpace Laser Communications Technique of all kinds of mobile platforms such as aircraft, aircraft, captive balloon, vehicle, naval vessels.These are successfully tested
Major part is laser communication experiment based on intensity modulated/direct detection system, and the laser communication technology of coherent receivers has
High sensitivity, anti-Japanese icepro, be suitable for overlength distance transmission advantage, be the most increasingly becoming grinding of laser space communication field
Study carefully focus.In particular with the success of European Terra SAR Satellite Coherent Optical Communication experiment in 2008, and based on Terra
The project of the European data relay system of SAR coherent communication link upgrading is implemented, and imply that Satellite Coherent Optical Communication
Technology will be one of the Primary communication technology of Future Satellite light backbone network, indicate that the research of Satellite Coherent Optical Communication will be from examination
Test Qualify Phase and proceed to practical stage.
From the point of view of the progress of comprehensive countries in the world scientists, BPSK modulation, the space optical communication of homodyne coherent reception
System, by becoming one of main system of spatial information net laser backbone communication links, connects based on COSTAS Optical phase-locked loop homodyne
Receipts machine is currently mainly coherent receiver scheme, uses coherent communication signal and extracts tracking error, communication, Tracking Integrative principle
Design is the development trend that coherent optical communication receiver is following.
Chinese Space laser communication technology is the most flourish, and domestic Duo Jia colleges and universities and research unit have all carried out in a large number
Theoretical research, key technology demonstrates, the work such as laser terminal development, achieves great successes.2011, China ocean two
The laser communication terminal of number Seeds of First Post-flight is successfully realized the satellite-ground laser communication link of 504Mbps, becomes China Satellite Communications
An important milestone in technograph.
Currently, the research of Chinese Space optical communication field is in from IM/DD satellite optical communication to coherent light communication technology
Transition stage.Main research concentrates on the conceptual phase being applicable to the key technology of Satellite Coherent Optical Communication, Primary Component.
Satellite Coherent Optical Communication is studied, and premise based on the matched of coherent states field, is main to obtain high receiving sensitivity
Target.The dynamic characteristic of communication link, the characteristic of channel in Satellite Coherent Optical Communication, the spatial light interface of terminal inner device is equal
It it is the source causing light field mismatch.Light field mismatch ultimately causes the decline of receiving sensitivity, and this is Satellite Coherent Optical Communication link
The factor that must take in overall study and the work of receiver study of hardware.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency present in prior art, and provides a kind of simple in construction,
Reasonable in design, traffic rate is high, and the BPSK space optical communication of strong interference immunity receives demodulating system.
The technical scheme in the invention for solving the above technical problem is: this BPSK space optical communication receives demodulation system
System, it is characterised in that include that photomodulator, optical mixer unit, balanced detector, phase discriminator, essence follow the tracks of phase-locked loop and frequency
Coarse tuning circuit.
This optical mixer unit, for being mixed with local oscillator laser signal by reception signal, and forms four road signals, described light
Manipulator is connected to optical mixer unit.
This balanced detector, it is connected to optical mixer unit, for being converted into each other by the four road signals that optical mixer unit is formed
The orthogonal first via signal of telecommunication and the second road signal of telecommunication.
This phase discriminator, it is connected to balanced detector, for output one road demodulating data and two-way in-phase signal.
This essence follows the tracks of phase-locked loop, and it is connected with phase discriminator, and includes operational amplifier and voltage controlled oscillator, described pressure
Controlled oscillator is connected with photomodulator, and above-mentioned two-way in-phase signal Zhong mono-tunnel enters described operational amplifier and is adjusted also
Exported by voltage controlled oscillator.
This frequency coarse tuning circuit, it is connected with phase discriminator, and includes low pass filter, power detection module, an A/D
Modular converter, the 2nd A/D modular converter, FPGA, D/A conversion, laser instrument, another road warp in above-mentioned two-way in-phase signal
Cross described low pass filter, send into power detection module and carry out frequency coarse adjustment, then through data acquisition, according to the power of signal
With the state that above-mentioned essence follows the tracks of phase-locked loop, it is judged that whether laser frequency falls in essence follows the tracks of the frequency band range of phase-locked loop,
If in the range of, stop regulation, if not in the range of, the most constantly regulation D/A conversion, control laser frequency so that it is fall
Entering in the frequency band that essence follows the tracks of phase-locked loop, the output frequency of above-mentioned voltage controlled oscillator has mixed phase-locked frequency with laser frequency
Rate essence is followed the tracks of, and described laser instrument is connected to photomodulator.
Phase discriminator described in the utility model includes comparator, clock distributor, XOR gate, the described first via signal of telecommunication and
The second road signal of telecommunication first passes through comparator shaping, becomes digital signal, subsequently by clock distributor, by the above-mentioned first via
The signal of telecommunication and the second road signal of telecommunication become two-way respectively, and two-way Zhong mono-tunnel that the described first via signal of telecommunication is divided into is as demodulation number
According to output, the XOR gate of leading up in the two-way that an other road and the second road signal of telecommunication are divided into carries out XOR, by first
The phase difference variable of path channels and the second path channels is pulse signal, and pulse signal becomes described two-way through clock distributor again
In-phase signal.
Comparator described in the utility model includes the first comparator, the 4th comparator, and described clock distributor includes second
Clock distributor, the 5th clock distributor and the 6th clock distributor, the first comparator is connected with second clock allotter, and second
Clock distributor is connected with XOR gate, and XOR gate and the 6th clock distributor connect, the 4th comparator and the 5th clock distributor
Connecting, the 5th clock distributor is connected with XOR gate.
Essence described in the utility model is followed the tracks of phase-locked loop and is used analog wave filter to be filtered input signal, then adds
To the voltage controling end of voltage controlled oscillator, the output of voltage controlled oscillator is mixed with laser instrument, completes the narrow-band tracking of frequency.
This utility model compared with prior art, has the following advantages and effect: simple in construction, reasonable in design, communication speed
Rate is high, follows the tracks of phase-locked loop and the setting of frequency coarse tuning circuit by essence so that strong interference immunity.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structured flowchart that the BPSK space optical communication in this utility model embodiment receives demodulating system.
Fig. 2 is the circuit theory diagrams of phase discriminator.
Fig. 3 is the circuit theory diagrams that essence follows the tracks of phase-locked loop.
Fig. 4 is the structured flowchart of frequency coarse tuning circuit.
Fig. 5 is the circuit theory diagrams of low pass filter and power detection module.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following example are right
Explanation of the present utility model and this utility model is not limited to following example.
Embodiment 1.
As it is shown in figure 1, the BPSK space optical communication of the present embodiment receives demodulating system includes photomodulator 1, optical mixer unit
2, balanced detector 3, phase discriminator 4, essence follow the tracks of phase-locked loop 5 and frequency coarse tuning circuit 6.
Optical mixer unit 2 in the present embodiment, for being mixed with local oscillator laser signal by reception signal, and forms four tunnels
Signal, photomodulator 1 is connected to optical mixer unit 2.The local oscillator laser signal at this place refers to the persistent wave that laser instrument 67 produces.
Balanced detector 3 in the present embodiment, it is connected to optical mixer unit 2, for the four road letters formed by optical mixer unit 2
Number it is converted into the most orthogonal first via signal of telecommunication I and the second road signal of telecommunication Q.
Phase discriminator 4 in the present embodiment, it is connected to balanced detector 3, for output one road demodulating data and two-way
In-phase signal.
Essence in the present embodiment follows the tracks of phase-locked loop 5, and it is connected with phase discriminator 4, and include operational amplifier A D829 with
Voltage controlled oscillator ROS-520+, voltage controlled oscillator ROS-520+ are connected with photomodulator 1, above-mentioned in two-way in-phase signal one
Road is entered described operational amplifier A D829 and is adjusted and is exported by voltage controlled oscillator ROS-520+.
As shown in Figure 1 and Figure 4, the frequency coarse tuning circuit 6 in the present embodiment, it is connected with phase discriminator 4, and includes low pass
Wave filter 61, power detection module the 62, the oneth A/D modular converter the 63, the 2nd A/D modular converter 64, FPGA65, D/A conversion 66,
Laser instrument 67, power detection module, through described low pass filter 61, is sent in above-mentioned another road in two-way in-phase signal
62 carry out frequency coarse adjustment, then through data acquisition, according to power and the state of above-mentioned essence tracking phase-locked loop 5 of signal, sentence
Whether disconnected laser frequency falls in essence follows the tracks of the frequency band range of phase-locked loop 5, if in the range of, stops regulation, if not
In the range of, the most constantly regulation D/A conversion 66, controls laser instrument 67 frequency so that it is falls into essence and follows the tracks of the frequency band of phase-locked loop 5
In, the output frequency of above-mentioned voltage controlled oscillator ROS-520+ and laser instrument 67 frequency compounding complete frequency of phase locking essence and follow the tracks of, and swash
Light device 67 is connected to photomodulator 1.
In the present embodiment, phase discriminator 4 includes comparator, clock distributor, XOR gate HMC745LC3, the first via signal of telecommunication
I and the second road signal of telecommunication Q first passes through comparator shaping, becomes digital signal, subsequently by clock distributor, by above-mentioned the
One road signal of telecommunication I and the second road signal of telecommunication Q becomes two-way respectively, and two-way Zhong mono-tunnel that first via signal of telecommunication I is divided into is as solution
Adjusting data exports, and the XOR gate HMC745LC3 of leading up in the two-way that an other road and the second road signal of telecommunication Q are divided into carries out different
Or computing, it is pulse signal by the phase difference variable of first via channel and the second path channels, pulse signal is again through clock distributor
Become described two-way in-phase signal.
Concrete, in the present embodiment comparator include the first comparator HMC674LP3E*1, the 4th comparator
HMC674LP3E*4, clock distributor includes second clock allotter ADCLK944*2, the 5th clock distributor ADCLK944*5
With the 6th clock distributor ADCLK944*6, the first comparator HMC674LP3E*1 and second clock allotter ADCLK944*2 even
Connecing, second clock allotter ADCLK944*2 is connected with XOR gate HMC745LC3, and XOR gate HMC745LC3 and the 6th clock divide
Orchestration ADCLK944*6 connects, and the 4th comparator HMC674LP3E*4 and the 5th clock distributor ADCLK944*5 connects, and the 5th
Clock distributor ADCLK944*5 is connected with XOR gate HMC745LC3, and first via differential signal initially enters the first comparator
HMC674LP3E*1, then sequentially pass through second clock allotter ADCLK944*2 and XOR gate HMC745LC3, and Two-pass DINSAR
Signal initially enters the 4th comparator HMC674LP3E*4, then sequentially passes through the 4th comparator HMC674LP3E*4 and XOR gate
HMC745LC3, XOR gate HMC745LC3 carry out XOR, are arteries and veins by the phase difference variable of first via channel and the second path channels
Rushing signal, pulse signal becomes two-way in-phase signal through the 6th clock distributor ADCLK944*6 again.
Essence in the present embodiment is followed the tracks of phase-locked loop 5 and is used analog wave filter to be filtered input signal, then adds
To the voltage controling end of voltage controlled oscillator ROS-520+, the output of voltage controlled oscillator ROS-520+ is mixed with laser instrument 67,
Complete the narrow-band tracking of frequency.This analog wave filter is active filter.
As in figure 2 it is shown, be the circuit theory diagrams of phase discriminator 4, the first via signal of telecommunication initially enters the first comparator
HMC674LP3E*1, INP connect I road signal anode, and INN connects I road signal negative terminal, and VTP, VTN, N/C, RTN meet GND, and 5 foot Vcci connect
Electric capacity C11 and 3.3V power supply, C11 another termination GND, 9 foot Vcco connect electric capacity C8 and 2V power supply, C8 another termination GND, 12 feet
Vcco connects electric capacity C4 and 2V power supply, and C4 another termination GND, 13 foot Vee connect electric capacity C1 and-3V power supply and be connected, another termination of C1
GND, 16 foot Vcci connect electric capacity C2 and 3.3V power supply and are connected, and C2 another termination GND, 11 foot Q meet the second comparator ADCLK944*2
1 foot CLK, 10 feetConnect 4 feet of second clock allotter ADCLK944*2Second clock allotter ADCLK944*2's
2 foot VT and 3 foot VREF are connected, and 5 foot VEE and 16 foot VEE meet GND, and 8 foot VCC connect electric capacity C10 and 3.3V power supply, another termination of C10
GND, 13 foot VCC connect electric capacity C3 and 3.3V power supply, C3 another termination GND, 12 foot Q1 and 11 feetDefeated as differential data demodulation
Go out end, 10 foot Q2 and 9 feetMeet the 2 foot AN and 3 foot AP of XOR gate HMC745LC3*3 respectively.
The second road signal of telecommunication initially enters the 4th comparator HMC674LP3E*4, and INP connects Q road signal anode, and INN connects Q road
Signal negative terminal, VTP, VTN, N/C, RTN meet GND, and 5 foot Vcci connect electric capacity C19 and 3.3V power supply, C19 another termination GND, 9 feet
Vcco connects electric capacity C17 and 2V power supply, and C17 another termination GND, 12 foot Vcco connect electric capacity C16 and 2V power supply, another termination of C16
GND, 13 foot Vee connect electric capacity C12 and-3V power supply and are connected, and C12 another termination GND, 16 foot Vcci connect electric capacity C13 and 3.3V power supply,
C13 another termination GND, 11 foot Q connect the 1 foot CLK of the 5th clock distributor ADCLK944*5,10 feetMeet comparator * 5
(ADCLK944) 4 foot* the 2 foot VT and 3 foot VREF of 5 are connected, 5 foot VEE and 16 foot VEE meet GND, and 8 foot VCC meet electric capacity C18
With 3.3V power supply, C18 another termination GND, 13 foot VCC connect electric capacity C14 and 3.3V power supply, another termination GND, 12 foot Q1 of C14 and
11 feetBetween series resistor R4,10 foot Q2 and 9 feetMeet the 7 foot BN and 6 foot BP of XOR gate * 3 (HMC745LC3) respectively.
1 foot of XOR gate HMC745LC3*3,4 feet, 5 feet, 8 feet, 9 feet, 12 feet, 14 feet meet GND, and 13 foot VCC meet electric capacity C7
With 3.3V power supply, C7 another termination GND, 16 foot VCC connect electric capacity C6 and 3.3V power supply, and C6 another termination GND, 15 foot VR meet R1 also
Being connected with C5, another termination GND, 11 foot DP of R1 and C5 meet the 1 foot CLK of the 6th clock distributor ADCLK944*6,10 foot DN
Connect 4 feet of * 6
The 2 foot VT and 3 foot VREF of the 6th clock distributor ADCLK944*6 are connected, and 5 foot VEE and 16 foot VEE meet GND, 8 feet
VCC connects electric capacity C15 and 3.3V power supply, and C15 another termination GND, 13 foot VCC connect electric capacity C9 and 3.3V power supply, another termination of C9
GND, 11 feetConnecting resistance R2, R2 another termination GND, 9 feetConnecting resistance R3, R3 another termination GND, 10 foot Q2 connect frequency rough
Adjust input inductance L2,12 foot Q1 to connect essence and follow the tracks of phase-locked loop input R7.
As it is shown on figure 3, Fig. 3 be essence follow the tracks of phase-locked loop 5 circuit theory diagrams, another termination capacitor C22 of R7, C22 another
2 foot-IN of termination operational amplifier A D829, concatenate C21, C21 another termination C20 and R5, the 1 of operational amplifier A D829 simultaneously
Foot OFFSET NULL with R6 is connected, and the R6 other end and 8 foot OFFSET NULL are connected, the 3 foot+IN and 4 of operational amplifier A D829
Foot-Vs meets GND, 5 foot Ccomp connect C23, C23 another termination GND, 7 foot+Vs connect power supply+5V, 6 foot OUTPUT connect R5, C20 another
End, is connected with 2 foot Vtune and the 2nd A/D modular converter 64 of voltage controlled oscillator ROS-520+ simultaneously.Form active low-pass filter
Device, analog wave filter the most mentioned above.
The 1 of voltage controlled oscillator ROS-520+, 3,4,5,6,7,8,9,11,12,13,15,16 feet meet GND, 14 foot Vcc connect electricity
Source+5V, 10 foot RFout are connected with the input of photomodulator 1.
As it is shown in figure 5, Fig. 5 is low pass filter 61 and the circuit theory diagrams of power detection module 62, low pass filter 61
Inductance L2 another termination C27 and L3, C27 another termination GND, L3 another termination L4 and C28, C28 another termination
8 foot INP and L1 of the circuit chip AD8307 of another termination power detection module 62 of another termination C25, C25 of GND, L3,
1 foot INM, the C24 of power detection module 62 another termination GND of another termination C24 and circuit chip AD8307 of L1, circuit core
The 2 foot COM of sheet AD8307 meet GND, and 4 feet connect an A/D modular converter 63, the 6 foot ENB of circuit chip AD8307,7 foot VPS strings
Connect and be connected with R8 and C26, R8 another termination power 3.3V, C26 another termination GND.
Operation principle of the present utility model:
Receive signal to be mixed with local oscillator laser signal by 2, form four road signals, then through balanced detector 3, light is believed
Number it is converted into orthogonal I, Q two path signal.I, Q first pass through comparator shaping, become digital signal, are divided by clock subsequently
Orchestration, while being divided into two-way by every road signal, it is ensured that I, the phase equalization of Q channel.The signal two-way Zhong mono-tunnel conduct of I road
Demodulation output, an other road carries out XOR with wherein Q road, a road signal, is pulse letter by the phase difference variable of I, Q channel
Number, pulse signal becomes two-way in-phase signal through clock distribution circuit again, and wherein a road is after low pass filter 61, sends into
Power detection module 62 carries out frequency coarse adjustment, then through data acquisition, according to power and the shape of essence tracking phase-locked loop 5 of signal
State, can effectively judge whether laser frequency falls in essence follows the tracks of the frequency band range of phase-locked loop 5, if in the range of, stops
Only regulation, if not in the range of, the most constantly regulation the oneth A/D modular converter 63, control the frequency of laser instrument 67 so that it is fall into
Essence is followed the tracks of in the frequency band of phase-locked loop 5.An other road, through second order active low pass filter, controls voltage controlled oscillator ROS-520+
Output frequency and laser instrument 67 frequency be mixed, complete frequency of phase locking essence and follow the tracks of.
FPGA65 in the present embodiment refers to field programmable gate array, is a kind of integrated circuit, belongs to prior art,
Here is omitted.
This utility model simple in construction, reasonable in design, traffic rate is high, follows the tracks of phase-locked loop and frequency coarse adjustment electricity by essence
The setting on road so that strong interference immunity.
Above content described in this specification is only to this utility model example explanation.This utility model
Described specific embodiment can be made various amendment or supplements or use class by person of ordinary skill in the field
As mode substitute, without departing from the content of this utility model description or surmount model defined in the claims
Enclose, protection domain of the present utility model all should be belonged to.
Claims (7)
1. a BPSK space optical communication receives demodulating system, it is characterised in that including:
Photomodulator；
Optical mixer unit, for being mixed with local oscillator laser signal by reception signal, and forms four road signals, described photomodulator
It is connected to optical mixer unit；
Balanced detector, it is connected to optical mixer unit, for being converted into the most orthogonal by the four road signals that optical mixer unit is formed
The first via signal of telecommunication and the second road signal of telecommunication；
Phase discriminator, it is connected to balanced detector, for output one road demodulating data and two-way in-phase signal；
Essence follows the tracks of phase-locked loop, and it is connected with phase discriminator, and includes operational amplifier and voltage controlled oscillator, described VCO
Device is connected with photomodulator, and above-mentioned two-way in-phase signal Zhong mono-tunnel enters described operational amplifier and is adjusted and passes through pressure
Controlled oscillator exports；
Frequency coarse tuning circuit, it is connected with phase discriminator, and includes low pass filter, power detection module, an A/D modulus of conversion
Block, the 2nd A/D modular converter, FPGA, D/A conversion, laser instrument, above-mentioned another road in two-way in-phase signal is through described
Low pass filter, sends into power detection module and carries out frequency coarse adjustment, then through data acquisition, according to the power of signal and above-mentioned
Essence follows the tracks of the state of phase-locked loop, it is judged that whether laser frequency falls in essence follows the tracks of the frequency band range of phase-locked loop, if at model
In enclosing then stop regulation, if not in the range of, the most constantly regulation D/A conversion, control laser frequency so that it is fall into essence tracking
In the frequency band of phase-locked loop, the output frequency of above-mentioned voltage controlled oscillator mixed with laser frequency frequency of phase locking essence with
Track, described laser instrument is connected to photomodulator.
BPSK space optical communication the most according to claim 1 receives demodulating system, it is characterised in that: described phase discriminator bag
Include comparator, clock distributor, XOR gate, the described first via signal of telecommunication and the second road signal of telecommunication and first pass through comparator shaping,
Become digital signal, subsequently by clock distributor, the above-mentioned first via signal of telecommunication and the second road signal of telecommunication are become two respectively
Road, two-way Zhong mono-tunnel that the described first via signal of telecommunication is divided into exports as demodulating data, an other road and the second road signal of telecommunication
XOR gate of leading up in the two-way being divided into carries out XOR, by the phase difference variable of first via channel and the second path channels is
Pulse signal, pulse signal becomes described two-way in-phase signal through clock distributor again.
BPSK space optical communication the most according to claim 2 receives demodulating system, it is characterised in that: described comparator includes
First comparator, the 4th comparator, when described clock distributor includes second clock allotter, the 5th clock distributor and the 6th
Clock allotter, the first comparator is connected with second clock allotter, and second clock allotter is connected with XOR gate, XOR gate and
Six clock distributors connect, and the 4th comparator and the 5th clock distributor connect, and the 5th clock distributor is connected with XOR gate.
BPSK space optical communication the most according to claim 1 receives demodulating system, it is characterised in that: described essence is followed the tracks of phase-locked
Loop uses analog wave filter to be filtered input signal, is then added to the voltage controling end of voltage controlled oscillator, voltage-controlled shakes
The output swinging device is mixed with laser instrument, completes the narrow-band tracking of frequency.
BPSK space optical communication the most according to claim 3 receives demodulating system, it is characterised in that: described first via telecommunications
Number initially entering the first comparator, the INP of the first comparator connects I road signal anode, and INN meets I road signal negative terminal, VTP, VTN, N/
C, RTN meet GND, and 5 foot Vcci connect electric capacity C11 and 3.3V power supply, and C11 another termination GND, 9 foot Vcco connect electric capacity C8 and 2V power supply,
C8 another termination GND, 12 foot Vcco connect electric capacity C4 and 2V power supply, and C4 another termination GND, 13 foot Vee connect electric capacity C1 and-3V power supply
Being connected, C1 another termination GND, 16 foot Vcci connect electric capacity C2 and 3.3V power supply and are connected, and C2 another termination GND, 11 foot Q connect the second ratio
1 foot CLK of relatively device, 10 feetConnect 4 feet of second clock allotter2 foot VT of second clock allotter and 3 foot VREF phases
Even, 5 foot VEE and 16 foot VEE meet GND, and 8 foot VCC connect electric capacity C10 and 3.3V power supply, and C10 another termination GND, 13 foot VCC connect electricity
Hold C3 Yu 3.3V power supply, C3 another termination GND, 12 foot Q1 and 11 feetOutfan, 10 foot Q2 and 9 feet are demodulated as differential dataMeet the 2 foot AN and 3 foot AP of XOR gate respectively；The second road signal of telecommunication initially enters the 4th comparator, the INP of the 4th comparator
Connecing Q road signal anode, INN connects Q road signal negative terminal, and VTP, VTN, N/C, RTN meet GND, and 5 foot Vcci connect electric capacity C19 Yu 3.3V electricity
Source, C19 another termination GND, 9 foot Vcco connect electric capacity C17 and 2V power supply, C17 another termination GND, 12 foot Vcco connect electric capacity C16 with
2V power supply, C16 another termination GND, 13 foot Vee connect electric capacity C12 and-3V power supply and be connected, C12 another terminate GND, 16 foot Vcci and connect
Electric capacity C13 and 3.3V power supply, C13 another termination GND, 11 foot Q connect 1 foot CLK of the 5th clock distributor, 10 feetConnect comparator
4 feetThe 2 foot VT and 3 foot VREF of five clock distributors are connected, and 5 foot VEE and 16 foot VEE meet GND, and 8 foot VCC connect electric capacity
C18 Yu 3.3V power supply, C18 another termination GND, 13 foot VCC connect electric capacity C14 and 3.3V power supply, C14 another termination GND, 12 foot Q1
With 11 feetBetween series resistor R4,10 foot Q2 and 9 feetMeet the 7 foot BN and 6 foot BP of XOR gate respectively；1 foot of XOR gate, 4
Foot, 5 feet, 8 feet, 9 feet, 12 feet, 14 feet meet GND, and 13 foot VCC connect electric capacity C7 and 3.3V power supply, C7 another termination GND, 16 foot VCC
Connecing electric capacity C6 and 3.3V power supply, C6 another termination GND, 15 foot VR meet R1 and are connected with C5, another termination GND of R1 and C5, and 11
Foot DP meets the 6th clock distributor foot CLK, 10 foot DN and connects 4 feet of * 6The 2 foot VT and 3 foot VREF of the 6th clock distributor
Being connected, 5 foot VEE and 16 foot VEE meet GND, and 8 foot VCC connect electric capacity C15 and 3.3V power supply, and C15 another termination GND, 13 foot VCC connect
Electric capacity C9 and 3.3V power supply, C9 another termination GND, 11 feetConnecting resistance R2, R2 another termination GND, 9 feetConnecting resistance R3, R3
Another terminates GND, 10 foot Q2 and meets frequency coarse adjustment input inductance L2, and 12 foot Q1 connect essence and follow the tracks of phase-locked loop input R7.
BPSK space optical communication the most according to claim 4 receives demodulating system, it is characterised in that: described essence is followed the tracks of phase-locked
Another termination capacitor C22 of the R7 of loop, 2 foot-IN of another termination operational amplifier of C22, concatenate another termination of C21, C21 simultaneously
C20 and R5,1 foot OFFSET NULL with R6 of operational amplifier are connected, and the R6 other end and 8 foot OFFSET NULL are connected, computing
3 foot+the IN and 4 foot-Vs of amplifier meet GND, and 5 foot Ccomp meet C23, C23 another termination GND, 7 foot+Vs and connect power supply+5V, 6 feet
OUTPUT connects R5, C20 other end, is connected with 2 foot Vtune and the 2nd A/D modular converter 64 of voltage controlled oscillator simultaneously, described pressure
The 1 of controlled oscillator, 3,4,5,6,7,8,9,11,12,13,15,16 feet meet GND, 14 foot Vcc connect power supply+5V, 10 foot RFout with
The input of photomodulator 1 is connected.
BPSK space optical communication the most according to claim 4 receives demodulating system, it is characterised in that: described low pass filter
The other end of another termination L4 and C28, C28 of another termination GND, L3 of another termination C27 and L3, C27 of the inductance L2 of 61
Meet 8 foot INP and L1 of the circuit chip of another termination power detection module 62 of another termination C25, C25 of GND, L3, L1's
Another terminates C24 and 1 foot INM of circuit chip, the C24 of power detection module another termination GND, 2 foot COM of circuit chip and connects
GND, 4 feet connect an A/D modular converter, and 6 foot ENB of circuit chip, 7 foot VPS concatenations are also connected with R8 and C26, the R8 other end
Meet power supply 3.3V, C26 another termination GND.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116545542A (en) * | 2023-06-19 | 2023-08-04 | 济南大学 | Random frequency difference locking algorithm for coherent optical communication local oscillation light and signal light |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116545542A (en) * | 2023-06-19 | 2023-08-04 | 济南大学 | Random frequency difference locking algorithm for coherent optical communication local oscillation light and signal light |
| CN116545542B (en) * | 2023-06-19 | 2023-09-29 | 济南大学 | Random frequency difference locking algorithm for coherent optical communication local oscillation light and signal light |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161207 Effective date of abandoning: 20181204 |