CN106788770A - According to the method for channel status Automatic adjusument Atmospheric Laser Communications System transmission power - Google Patents
According to the method for channel status Automatic adjusument Atmospheric Laser Communications System transmission power Download PDFInfo
- Publication number
- CN106788770A CN106788770A CN201611114333.2A CN201611114333A CN106788770A CN 106788770 A CN106788770 A CN 106788770A CN 201611114333 A CN201611114333 A CN 201611114333A CN 106788770 A CN106788770 A CN 106788770A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- laser
- laser communication
- control module
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/564—Power control
Abstract
The present invention relates to a kind of method according to channel status Automatic adjusument Atmospheric Laser Communications System transmission power, it is characterised in that：Information is sent and received using transmit-receive sharing Single-Mode Fiber Coupling laser communication receiving and transmitting terminalses, a two-way atmosphere laser communication system is constituted by two construction identical transmit-receive sharing Single-Mode Fiber Coupling laser communication receiving and transmitting terminalses；It can enable two-way atmosphere laser communication system that the peak transmitted power size of laser pulse is adaptively adjusted according to instantaneous channel state, increase the peak transmitted power of laser pulse in transmitting terminal i.e. when optical signal declines, to compensate the negative effect of atmospheric turbulance generation.
Description
Technical field
The present invention relates to a kind of method according to channel status Automatic adjusument Atmospheric Laser Communications System transmission power, belong to
Atmospheric channel technical field of laser communication.
Background technology
Atmospheric turbulance influence problem is a Research Challenges in atmospheric channel technical field of laser communication.Atmospheric turbulance is led
Cause laser signal intensity that random fluctuation occurs.When laser signal declines, the detection signal to noise ratio of receiver can be reduced, and be caused
Communication bit error rates rise.In the case, in order to compensate the influence that laser signal declines, the peak value hair of laser pulse can be increased
Penetrate power.For using erbium-doped fiber amplifier（EDFA）The laser communication transmitter of light amplification is carried out, if EDFA is operated in
Saturation region, emitter can be regarded as the emitter of average emitted power limited（Referring to being published in《Journal of Optical
and Fiber Communication Reports》225-362 pages of volume 4 of papers in 2007）.For average emitted power
Limited laser communication transmitter, reduces the dutycycle of light pulse signal（Duty Cycle）Its peak work of light pulse can be increased
Rate.Therefore, for transmitting terminal using EDFA atmospheric channel laser communication system（EDFA is operated in saturation region）For, when big
When gas turbulent flow causes laser signal to decline, can be by the peak value that reduces the dutycycle of light pulse signal to increase light pulse
Power, so as to compensate the negative effect that atmospheric turbulance is caused.For using pulse position modulation（PPM）The atmospheric laser of mode leads to
For letter system, reducing communication data emission rate can just reduce the dutycycle of light pulse signal.
It is published in 12th Annual Meeting of IEEE Lasers and Electro-Optics Society
（LEOS’99）297-298 pages of proceeding of paper《High-Sensitivity Variable-rate
Transmit/Receive Architecture》Paper with 301-302 pages《A Novel Variable-Rate Pulse-
Position Modulation System with Near Quantum Limited Performance》Report and use
The variable bit rate laser communication receiving and transmitting terminalses structure and variable duty ratio binary system PPM signaling formats of EDFA；In the communication of report
In terminal, using variable duty ratio binary system PPM signaling formats, when communication data emission rate is reduced, laser pulse can be made
Peak power increase（The pulse temporal width of the binary system PPM signal of different rates is the same, but dutycycle is different）.Utilize
The variable bit rate laser communication receiving and transmitting terminalses structure and its modulation/demodulation system of above-mentioned report, you can by changing communication data
Emission rate adjusts the peak transmitted power of laser pulse.For atmospheric channel laser communication, atmospheric condition it is random
Property causes channel status also to be changed with the time.Under the conditions of good channel status, communication system uses data higher
Emission rate can also obtain given bit error rate performance index；When channel status change is severe（There is serious declining in optical signal
Fall）, communication system then needs to reduce data transmission rate, so that the peak transmitted power for increasing laser pulse carrys out compensated optical signal
Decline.
According to《Journal of Optics》The paper of volume 15 in 2013《Enhanced Correlation of
Received Power-Signal Fluctuations in Bidirectional Optical Links》, using transmitting-receiving altogether
Being risen and fallen with the instantaneous luminous power of the different transmission directions of the two-way laser communication link of Single-Mode Fiber Coupling communication terminal equipment, it is good to have
Good correlation.Using this natural law, the present invention provides one kind according to channel status Automatic adjusument atmospheric optical communication system
The method of transmission power of uniting, it directly locally obtains instantaneous channel state in receiving and transmitting terminalses, and is determined properly according to channel status
Data transmission rate, and then the peak transmitted power of laser pulse is adjusted by change data emission rate, it is big to compensate
The optical signal decline that gas turbulent flow is caused.In the present invention, the modulation module of two-way laser communication system using it is above-mentioned can
Variable duty cycle binary system PPM signaling formats, use EDFA, the EDFA works for launching optical signal amplification in receiving and transmitting terminalses in addition
Make in saturation region.
The content of the invention
It is an object of the invention to provide one kind according to channel status Automatic adjusument Atmospheric Laser Communications System transmission power
Method, enable two-way atmosphere laser communication system according to instantaneous channel state be adaptively adjusted laser pulse peak value send out
Watt level is penetrated, i.e., increases the peak transmitted power of laser pulse in transmitting terminal when optical signal declines, to compensate air
The negative effect that turbulent flow is produced.
The technical proposal of the invention is realized in this way：Launched according to channel status Automatic adjusument Atmospheric Laser Communications System
The method of power, it is characterised in that：Information is sent and received using transmit-receive sharing Single-Mode Fiber Coupling laser communication receiving and transmitting terminalses,
A two-way lasercom is constituted by two construction identical transmit-receive sharing Single-Mode Fiber Coupling laser communication receiving and transmitting terminalses
System；First laser communication receiving and transmitting terminals of two-way atmosphere laser communication system include laser 1, electrooptic modulator 1, er-doped
Fiber amplifier S1, optical fiber circulator 1, convex lens 1, data modulation control module 1, erbium-doped fiber amplifier R1, Fabry-Perot
Sieve wave filter 1, optical tunable filter 1, detection sampling judging module 1；Three ports of optical fiber circulator 1 connect light respectively
Fine F1A, optical fiber F1B, optical fiber F1C；Second laser communication receiving and transmitting terminals of two-way atmosphere laser communication system include laser
2nd, electrooptic modulator 2, erbium-doped fiber amplifier S2, optical fiber circulator 2, convex lens 2, data modulation control module 2, Er-doped fiber
Amplifier R2, fabry-perot filter 2, optical tunable filter 2, detection sampling judging module 2；Optical fiber circulator 2
Three ports connect optical fiber F2A, optical fiber F2B, optical fiber F2C respectively.
The optical signal that laser 1 sends incides the optical signal input of electrooptic modulator 1；Data modulation control module 1
Binary data and data transmission rate control signal according to input produce the electricity of variable duty ratio binary system PPM signaling formats
Signal is simultaneously sent to the electric signal input end of electrooptic modulator 1, to control electrooptic modulator 1 to realize to electrooptic modulator 1
The modulation of input optical signal；The optical signal S101 of the output of electrooptic modulator 1 passes through optical fiber after amplifying through erbium-doped fiber amplifier S1
F1A enters the port A101 of optical fiber circulator 1, then the port A102 outgoing from optical fiber circulator 1 and entrance optical fiber F1B, then
It is transmitted into atmospheric channel by convex lens 1；Second laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
Optical signal S201 into being coupled in optical fiber F1B after convex lens 1, the port A102 subsequently into optical fiber circulator 1 and from
The port A103 of optical fiber circulator 1 enters optical fiber F1C, by Fabry-Perot after then amplifying through erbium-doped fiber amplifier R1
Wave filter 1 and optical tunable filter 1, finally reach detection sampling judging module 1；Detection sampling 1 pair of incidence of judging module
Optical signal S201 detected, sampled and adjudicated, demodulate second laser communication from two-way atmosphere laser communication system
The binary data that receiving and transmitting terminalses are sent, while detecting the PPM symbols corresponding time that sampling judging module 1 is detected at each
In the range of it is average to the power seeking time of the corresponding signal of PPM symbols that detects, and sent out using average value P PAVG1 as data
Rate controlled signal is penetrated to export to data modulation control module 1.
The optical signal that laser 2 sends incides the optical signal input of electrooptic modulator 2；Data modulation control module 2
Binary data and data transmission rate control signal according to input produce the electricity of variable duty ratio binary system PPM signaling formats
Signal is simultaneously sent to the electric signal input end of electrooptic modulator 2, to control electrooptic modulator 2 to realize to electrooptic modulator 2
The modulation of input optical signal；The optical signal S201 of the output of electrooptic modulator 2 passes through optical fiber after amplifying through erbium-doped fiber amplifier S2
F2A enters the port A201 of optical fiber circulator 2, then the port A202 outgoing from optical fiber circulator 2 and entrance optical fiber F2B, then
It is transmitted into atmospheric channel by convex lens 2；First laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
Optical signal S101 into being coupled in optical fiber F2B after convex lens 2, the port A202 subsequently into optical fiber circulator 2 and from
The port A203 of optical fiber circulator 2 enters optical fiber F2C, by Fabry-Perot after then amplifying through erbium-doped fiber amplifier R2
Wave filter 2 and optical tunable filter 2, finally reach detection sampling judging module 2；Detection sampling 2 pairs of incidences of judging module
Optical signal S101 detected, sampled and adjudicated, demodulate first laser communication from two-way atmosphere laser communication system
The binary data that receiving and transmitting terminalses are sent, while detecting the PPM symbols corresponding time that sampling judging module 2 is detected at each
In the range of it is average to the power seeking time of the corresponding signal of PPM symbols that detects, and sent out using average value P PAVG2 as data
Rate controlled signal is penetrated to export to data modulation control module 2.
Optical fiber F1A, optical fiber F1B, optical fiber F1C, optical fiber F2A, optical fiber F2B, optical fiber F2C are single-mode fibers.Er-doped fiber
Amplifier S1 and erbium-doped fiber amplifier S2 are operated in saturation region.Erbium-doped fiber amplifier R1 and erbium-doped fiber amplifier R2 works
In non-saturated region.
Data modulation control module 1 produces variable accounting for according to the binary data and data transmission rate control signal of input
The empty electric signal than binary system PPM signaling formats, wherein in given timet w The dutyfactor adjusting method at place is as follows：
Step101：OrderAV s The corresponding average value P PAVG1 of data transmission rate control signal is represented, is madeA t Represent detection sampling
The smallest peaks of the required pulse for detecting under conditions of it can meet specific bit error rate index of the symbol judgement of judging module 1
Value power；OrderA s = AV s/[D c +E R (1−D c )] represent the current pulse peak being calculated in data modulation control module 1
Value power,D c Represent the electric signal of the current variable duty ratio binary system PPM signaling formats for producing of data modulation control module 1
Dutycycle,E R Represent the extinction ratio of electrooptic modulator 1；IfA s /A t =1, then Step102 is gone to step, otherwise make target duty
Than, whereinExpression is rounded downwards；IfOr,
WhereinWithIt is respectively the minimum and maximum dutycycle of two-way atmosphere laser communication system permission, then goes to step
Step102, otherwise makes target pulse peak power；Judge
Whether it is less than, if it is, go to step Step102, otherwise data modulation control module 1 withValue as dutycycle come
The electric signal of variable duty ratio binary system PPM signaling formats is produced, Step103 is gone to step；
Step102：Data modulation control module 1 still produces variable duty ratio binary system PPM signaling formats by current dutycycle
Electric signal；
Step103：In given timet w Regulation operation of the place to dutycycle terminates.
Data modulation control module 1 is with time interval Δ t It is the cycle, is repeatedly carried out step Step101 to step
Operation described by Step103, so as to realize the electric signal to variable duty ratio binary system PPM signaling formats according to channel status
Dutycycle Self Adaptive Control, and then reach the purpose of the peak transmitted power for being adaptively adjusted laser pulse.
Data modulation control module 2 produces variable accounting for according to the binary data and data transmission rate control signal of input
The empty electric signal than binary system PPM signaling formats, wherein in given timet w The dutyfactor adjusting method at place is as follows：
Step201：Orderav s The corresponding average value P PAVG2 of data transmission rate control signal is represented, is madea t Represent detection sampling
The smallest peaks of the required pulse for detecting under conditions of it can meet specific bit error rate index of the symbol judgement of judging module 2
Value power；Ordera s = av s/[d c +e R (1−d c )] represent the current pulse peak being calculated in data modulation control module 2
Value power,d c Represent the electric signal of the current variable duty ratio binary system PPM signaling formats for producing of data modulation control module 2
Dutycycle,e R Represent the extinction ratio of electrooptic modulator 2；Ifa s /a t =1, then Step202 is gone to step, otherwise make target duty
Than；IfOr, whereinWith
It is respectively the minimum and maximum dutycycle of two-way atmosphere laser communication system permission, then goes to step Step202, otherwise makes target arteries and veins
Rush peak power；JudgeWhether it is less thana t , if it is,
Then go to step Step202, otherwise data modulation control module 2 withValue produce variable duty ratio two to enter as dutycycle
The electric signal of PPM signaling formats processed, goes to step Step203；
Step202：Data modulation control module 2 still produces variable duty ratio binary system PPM signaling formats by current dutycycle
Electric signal；
Step203：In given timet w Regulation operation of the place to dutycycle terminates.
Data modulation control module 2 is with time interval Δ t It is the cycle, is repeatedly carried out step Step201 to step
Operation described by Step203, so as to realize the electric signal to variable duty ratio binary system PPM signaling formats according to channel status
Dutycycle Self Adaptive Control, and then reach the purpose of the peak transmitted power for being adaptively adjusted laser pulse.
First laser communication receiving and transmitting terminals and second laser communication receiving and transmitting terminals of two-way atmosphere laser communication system
Structure it is identical with the physical parameter of modules, the error rate index described in step Step101 and step Step201
It is identical.
The positive effect of the present invention is led to using the two-way laser being made up of transmit-receive sharing Single-Mode Fiber Coupling communication terminal equipment
Believe that the instantaneous luminous power of the different transmission directions of link rises and falls with this natural law of good correlation, directly in communication ends
Machine locally obtains instantaneous channel state, and then the dutycycle of control transmitting optical signal accordingly, to adjust the peak value of laser pulse
Transmission power.The inventive method can effectively compensate for laser signal decline caused by atmospheric turbulance, so as to reduce atmospheric turbulance
The probability that caused laser communication link is interrupted, improves the performance of communication system.
Brief description of the drawings
Fig. 1 is that the two-way laser communication system being made up of two identical transmit-receive sharing Single-Mode Fiber Coupling communication terminal equipments is shown
It is intended to.
Specific embodiment
In order that the features and advantages of the present invention become more apparent, the present invention is made into one with reference to specific embodiment
The description of step.
The laser of embodiment 1 selects the distributed feedback laser of 1550nm wave bands, electrooptic modulator to select LiNbO3
Mach-Zehnder modulators, victory SG-EDFA-21dB erbium-doped fiber amplifiers, fiber annular when erbium-doped fiber amplifier is selected
Optical fiber circulator of the device from ThorLabs.
As shown in figure 1, information is sent and received using transmit-receive sharing Single-Mode Fiber Coupling laser communication receiving and transmitting terminalses, by two
Individual construction identical transmit-receive sharing Single-Mode Fiber Coupling laser communication receiving and transmitting terminalses constitute a two-way atmosphere laser communication system；
First laser communication receiving and transmitting terminals of two-way atmosphere laser communication system include laser 1 (101), electrooptic modulator 1
(102), erbium-doped fiber amplifier S1 (103), optical fiber circulator 1 (104), convex lens 1 (108), data modulation control module 1
(109), erbium-doped fiber amplifier R1 (110), fabry-perot filter 1 (111), optical tunable filter 1 (112), spy
Survey sampling judging module 1 (113)；Three ports of optical fiber circulator 1 (104) connect optical fiber F1A (106), optical fiber F1B respectively
(105), optical fiber F1C (107)；Second laser communication receiving and transmitting terminals of two-way atmosphere laser communication system include laser 2
(201), electrooptic modulator 2 (202), erbium-doped fiber amplifier S2 (203), optical fiber circulator 2 (204), convex lens 2 (208), number
According to modulation control module 2 (209), erbium-doped fiber amplifier R2 (210), fabry-perot filter 2 (211), optical tunable
Wave filter 2 (212), detection sampling judging module 2 (213)；Three ports of optical fiber circulator 2 (204) connect optical fiber F2A respectively
(206), optical fiber F2B (205), optical fiber F2C (207).
The optical signal that laser 1 (101) sends incides the optical signal input of electrooptic modulator 1 (102)；Data are modulated
Control module 1 (109) produces variable duty ratio binary system according to the binary data and data transmission rate control signal of input
The electric signal of PPM signaling formats is simultaneously sent to the electric signal input end of electrooptic modulator 1 (102), to control electrooptic modulator 1
(102) modulation to the input optical signal of electrooptic modulator 1 (102) is realized；The optical signal of the output of electrooptic modulator 1 (102)
S101 enters the port of optical fiber circulator 1 (104) by optical fiber F1A (106) after amplifying through erbium-doped fiber amplifier S1 (103)
A101, then from the port A102 outgoing and entrance optical fiber F1B (105) of optical fiber circulator 1 (104), then by convex lens 1
(108) it is transmitted into atmospheric channel；The light letter of second laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
Number S201 is coupled in optical fiber F1B (105) after entering convex lens 1 (108), subsequently into the port of optical fiber circulator 1 (104)
A102 simultaneously enters optical fiber F1C (107) from the port A103 of optical fiber circulator 1 (104), then through erbium-doped fiber amplifier R1
(110) by fabry-perot filter 1 (111) and optical tunable filter 1 (112) after amplifying, finally reach detection and adopt
Sample judging module 1 (113)；Detection sampling judging module 1 (113) is detected, sampled and adjudicated to incident optical signal S201,
The binary data sent from second laser communication receiving and transmitting terminals of two-way atmosphere laser communication system is demodulated, while detection
PPM symbol correspondence of the sampling judging module 1 (113) in the corresponding time range of PPM symbols that each is detected to detecting
Signal power seeking time it is average, and average value P PAVG1 exported as data transmission rate control signal give data modulation
Control module 1 (109).
The optical signal that laser 2 (201) sends incides the optical signal input of electrooptic modulator 2 (202)；Data are modulated
Control module 2 (209) produces variable duty ratio binary system according to the binary data and data transmission rate control signal of input
The electric signal of PPM signaling formats is simultaneously sent to the electric signal input end of electrooptic modulator 2 (202), to control electrooptic modulator 2
(202) modulation to the input optical signal of electrooptic modulator 2 (202) is realized；The optical signal of the output of electrooptic modulator 2 (202)
S201 enters the port of optical fiber circulator 2 (204) by optical fiber F2A (206) after amplifying through erbium-doped fiber amplifier S2 (203)
A201, then from the port A202 outgoing and entrance optical fiber F2B (205) of optical fiber circulator 2 (204), then by convex lens 2
(208) it is transmitted into atmospheric channel；The light letter of first laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
Number S101 is coupled in optical fiber F2B (205) after entering convex lens 2 (208), subsequently into the port of optical fiber circulator 2 (204)
A202 simultaneously enters optical fiber F2C (207) from the port A203 of optical fiber circulator 2 (204), then through erbium-doped fiber amplifier R2
(210) by fabry-perot filter 2 (211) and optical tunable filter 2 (212) after amplifying, finally reach detection and adopt
Sample judging module 2 (213)；Detection sampling judging module 2 (213) is detected, sampled and adjudicated to incident optical signal S101,
The binary data sent from first laser communication receiving and transmitting terminals of two-way atmosphere laser communication system is demodulated, while detection
PPM symbol correspondence of the sampling judging module 2 (213) in the corresponding time range of PPM symbols that each is detected to detecting
Signal power seeking time it is average, and average value P PAVG2 exported as data transmission rate control signal give data modulation
Control module 2 (209).
Optical fiber F1A (106), optical fiber F1B (105), optical fiber F1C (107), optical fiber F2A (206), optical fiber F2B (205), optical fiber
F2C (207) is single-mode fiber.Erbium-doped fiber amplifier S1 (103) and erbium-doped fiber amplifier S2 (203) are operated in saturation
Area.Erbium-doped fiber amplifier R1 (110) and erbium-doped fiber amplifier R2 (210) are operated in non-saturated region.
Data modulation control module 1 (109) is produced according to the binary data and data transmission rate control signal of input
The electric signal of variable duty ratio binary system PPM signaling formats, wherein in given timet w The dutyfactor adjusting method at place is as follows：
Step101：OrderAV s The corresponding average value P PAVG1 of data transmission rate control signal is represented, is madeA t Represent detection sampling
The required pulse for detecting under conditions of it can meet specific bit error rate index of the symbol judgement of judging module 1 (113)
Minimum peak power；OrderA s = AV s/[D c +E R (1−D c )] represent be calculated in data modulation control module 1 (109) work as
Preceding pulse peak power,D c Represent the current variable duty ratio binary system PPM letters for producing of data modulation control module 1 (109)
The dutycycle of the electric signal of form is made,E R Represent the extinction ratio of electrooptic modulator 1 (102)；IfA s /A t =1, then go to step
Step102, otherwise makes target duty ratio；If>Or<, its
InWithIt is respectively the minimum and maximum dutycycle of two-way atmosphere laser communication system permission, then goes to step
Step102, otherwise makes target pulse peak power；JudgeWhether it is less thanA t , if it is, go to step Step102, otherwise data modulation control module 1 (109) withValue as accounting for
Sky compares to produce the electric signal of variable duty ratio binary system PPM signaling formats, goes to step Step103；
Step102：Data modulation control module 1 (109) still produces variable duty ratio binary system PPM signalings by current dutycycle
The electric signal of form；
Step103：At the momentt w Regulation operation of the place to dutycycle terminates.
Data modulation control module 1 (109) is with time interval Δ t It is the cycle, is repeatedly carried out step Step101 to step
Operation described by Step103, so as to realize the electric signal to variable duty ratio binary system PPM signaling formats according to channel status
Dutycycle Self Adaptive Control, and then reach the purpose of the peak transmitted power for being adaptively adjusted laser pulse.
Data modulation control module 2 (209) is produced according to the binary data and data transmission rate control signal of input
The electric signal of variable duty ratio binary system PPM signaling formats, wherein in given timet w The dutyfactor adjusting method at place is as follows：
Step201：Orderav s The corresponding average value P PAVG2 of data transmission rate control signal is represented, is madea t Represent detection sampling
The required pulse for detecting under conditions of it can meet specific bit error rate index of the symbol judgement of judging module 2 (213)
Minimum peak power；Ordera s = av s/[d c +e R (1−d c )] represent be calculated in data modulation control module 2 (209) work as
Preceding pulse peak power,d c Represent the current variable duty ratio binary system PPM letters for producing of data modulation control module 2 (209)
The dutycycle of the electric signal of form is made,e R Represent the extinction ratio of electrooptic modulator 2 (202)；Ifa s /a t =1, then go to step
Step202, otherwise makes target duty ratio；If> Or< ,
WhereinWithIt is respectively the minimum and maximum dutycycle of two-way atmosphere laser communication system permission, then goes to step
Step202, otherwise makes target pulse peak power；Judge
Whether it is less thana t , if it is, go to step Step202, otherwise data modulation control module 2 (209) withValue as duty
Than producing the electric signal of variable duty ratio binary system PPM signaling formats, Step203 is gone to step；
Step202：Data modulation control module 2 (209) still produces variable duty ratio binary system PPM signalings by current dutycycle
The electric signal of form；
Step203：At the momentt w Regulation operation of the place to dutycycle terminates.
Data modulation control module 2 (209) is with time interval Δ t It is the cycle, is repeatedly carried out step Step201 to step
Operation described by Step203, so as to realize the electric signal to variable duty ratio binary system PPM signaling formats according to channel status
Dutycycle Self Adaptive Control, and then reach the purpose of the peak transmitted power for being adaptively adjusted laser pulse.
First laser communication receiving and transmitting terminals and second laser communication receiving and transmitting terminals of two-way atmosphere laser communication system
Structure it is identical with the physical parameter of modules, the error rate index described in step Step101 and step Step201
It is identical.
In the present embodiment,Value is 1/2,Value is 1/48, Δ t Value is 0.25 millisecond.
Claims (5)
1. according to the method for channel status Automatic adjusument Atmospheric Laser Communications System transmission power, it is characterised in that：Use transmitting-receiving
Share Single-Mode Fiber Coupling laser communication receiving and transmitting terminalses and send and receive information, by two construction identical transmit-receive sharing single-mode optics
Fine coupled laser transceiver communication terminal constitutes a two-way atmosphere laser communication system；The first of two-way atmosphere laser communication system
Individual laser communication receiving and transmitting terminalses include laser 1, electrooptic modulator 1, erbium-doped fiber amplifier S1, optical fiber circulator 1, convex lens
1st, data modulation control module 1, erbium-doped fiber amplifier R1, fabry-perot filter 1, optical tunable filter 1, spy
Survey sampling judging module 1；Three ports of optical fiber circulator 1 connect optical fiber F1A, optical fiber F1B, optical fiber F1C respectively；Two-way air
Second laser communication receiving and transmitting terminals of laser communication system comprising laser 2, electrooptic modulator 2, erbium-doped fiber amplifier S2,
Optical fiber circulator 2, convex lens 2, data modulation control module 2, erbium-doped fiber amplifier R2, fabry-perot filter 2, light
Learn tunable optic filter 2, detection sampling judging module 2；Three ports of optical fiber circulator 2 connect optical fiber F2A, optical fiber respectively
F2B, optical fiber F2C；
The optical signal that laser 1 sends incides the optical signal input of electrooptic modulator 1；The basis of data modulation control module 1
The binary data and data transmission rate control signal of input produce the electric signal of variable duty ratio binary system PPM signaling formats
And the electric signal input end of electrooptic modulator 1 is sent to, to control electrooptic modulator 1 to realize the input to electrooptic modulator 1
The modulation of optical signal；The optical signal S101 of the output of electrooptic modulator 1 is entered after amplifying through erbium-doped fiber amplifier S1 by optical fiber F1A
Enter the port A101 of optical fiber circulator 1, then the port A102 outgoing from optical fiber circulator 1 and entrance optical fiber F1B, then by convex
Lens 1 are transmitted into atmospheric channel；The light letter of second laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
Number S201 into being coupled in optical fiber F1B after convex lens 1, the port A102 subsequently into optical fiber circulator 1 and from fiber optic loop
The port A103 of shape device 1 enters optical fiber F1C, by fabry-perot filter 1 after then amplifying through erbium-doped fiber amplifier R1
With optical tunable filter 1, detection sampling judging module 1 is finally reached；Detection sampling 1 pair of optical signal of incidence of judging module
S201 is detected, sampled and adjudicated, and demodulates second laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
The binary data sent, while it is right in the corresponding time range of PPM symbols that each is detected to detect sampling judging module 1
The power seeking time of the corresponding signal of PPM symbols for detecting is average, and using average value P PAVG1 as data transmission rate control
Signal output processed is to data modulation control module 1；
The optical signal that laser 2 sends incides the optical signal input of electrooptic modulator 2；The basis of data modulation control module 2
The binary data and data transmission rate control signal of input produce the electric signal of variable duty ratio binary system PPM signaling formats
And the electric signal input end of electrooptic modulator 2 is sent to, to control electrooptic modulator 2 to realize the input to electrooptic modulator 2
The modulation of optical signal；The optical signal S201 of the output of electrooptic modulator 2 is entered after amplifying through erbium-doped fiber amplifier S2 by optical fiber F2A
Enter the port A201 of optical fiber circulator 2, then the port A202 outgoing from optical fiber circulator 2 and entrance optical fiber F2B, then by convex
Lens 2 are transmitted into atmospheric channel；The light letter of first laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
Number S101 into being coupled in optical fiber F2B after convex lens 2, the port A202 subsequently into optical fiber circulator 2 and from fiber optic loop
The port A203 of shape device 2 enters optical fiber F2C, by fabry-perot filter 2 after then amplifying through erbium-doped fiber amplifier R2
With optical tunable filter 2, detection sampling judging module 2 is finally reached；Detection sampling 2 pairs of optical signals of incidence of judging module
S101 is detected, sampled and adjudicated, and demodulates first laser communication receiving and transmitting terminals from two-way atmosphere laser communication system
The binary data sent, while it is right in the corresponding time range of PPM symbols that each is detected to detect sampling judging module 2
The power seeking time of the corresponding signal of PPM symbols for detecting is average, and using average value P PAVG2 as data transmission rate control
Signal output processed is to data modulation control module 2.
2. a kind of side according to channel status Automatic adjusument Atmospheric Laser Communications System transmission power according to claim 1
Method, it is characterised in that described optical fiber F1A, optical fiber F1B, optical fiber F1C, optical fiber F2A, optical fiber F2B, optical fiber F2C are single-mode optics
It is fine.
3. a kind of side according to channel status Automatic adjusument Atmospheric Laser Communications System transmission power according to claim 1
Method, it is characterised in that described erbium-doped fiber amplifier S1 and erbium-doped fiber amplifier S2 is operated in saturation region.
4. a kind of side according to channel status Automatic adjusument Atmospheric Laser Communications System transmission power according to claim 1
Method, it is characterised in that described erbium-doped fiber amplifier R1 and erbium-doped fiber amplifier R2 is operated in non-saturated region.
5. a kind of side according to channel status Automatic adjusument Atmospheric Laser Communications System transmission power according to claim 1
Method, it is characterised in that binary data and data transmission rate control letter of the described data modulation control module 1 according to input
Number produce variable duty ratio binary system PPM signaling formats electric signal, wherein in given timet w The dutyfactor adjusting method at place
It is as follows：
Step101：OrderAV s The corresponding average value P PAVG1 of data transmission rate control signal is represented, is madeA t Detection sampling is represented to sentence
The certainly minimum peak of the required pulse for detecting under conditions of it can meet specific bit error rate index of the symbol judgement of module 1
Power；OrderA s = AV s/[D c +E R (1−D c )] represent the current peak value of pulse being calculated in data modulation control module 1
Power,D c Represent that the electric signal of data modulation control module 1 current variable duty ratio binary system PPM signaling formats for producing is accounted for
Sky ratio,E R Represent the extinction ratio of electrooptic modulator 1；IfA s /A t =1, then Step102 is gone to step, otherwise make target duty ratio, whereinExpression is rounded downwards；IfOr,
WhereinWithIt is respectively the minimum and maximum dutycycle of two-way atmosphere laser communication system permission, then goes to step
Step102, otherwise makes target pulse peak power；Sentence
It is disconnectedWhether it is less than, if it is, go to step Step102, otherwise data modulation control module 1 withValue as accounting for
Sky compares to produce the electric signal of variable duty ratio binary system PPM signaling formats, goes to step Step103；
Step102：Data modulation control module 1 still produces variable duty ratio binary system PPM signaling formats by current dutycycle
Electric signal；
Step103：In given timet w Regulation operation of the place to dutycycle terminates；
Data modulation control module 1 is with time interval Δ t It is the cycle, is repeatedly carried out step Step101 to step Step103 institutes
The operation of description, so as to realize the dutycycle to the electric signal of variable duty ratio binary system PPM signaling formats according to channel status
Self Adaptive Control, and then reach the purpose of the peak transmitted power for being adaptively adjusted laser pulse；
Data modulation control module 2 produces variable duty ratio according to the binary data and data transmission rate control signal of input
The electric signal of binary system PPM signaling formats, wherein in given timet w The dutyfactor adjusting method at place is as follows：
Step201：Orderav s The corresponding average value P PAVG2 of data transmission rate control signal is represented, is madea t Detection sampling is represented to sentence
The certainly minimum peak of the required pulse for detecting under conditions of it can meet specific bit error rate index of the symbol judgement of module 2
Power；Ordera s = av s/[d c +e R (1−d c )] represent the current peak value of pulse being calculated in data modulation control module 2
Power,d c Represent that the electric signal of data modulation control module 2 current variable duty ratio binary system PPM signaling formats for producing is accounted for
Sky ratio,e R Represent the extinction ratio of electrooptic modulator 2；Ifa s /a t =1, then Step202 is gone to step, otherwise make target duty ratio；IfOr, whereinWithRespectively
It is the minimum and maximum dutycycle of two-way atmosphere laser communication system permission, then goes to step Step202, otherwise makes target pulse peak
Value power；JudgeWhether it is less thana t , if it is,
Go to step Step202, otherwise data modulation control module 2 withValue variable duty ratio binary system is produced as dutycycle
The electric signal of PPM signaling formats, goes to step Step203；
Step202：Data modulation control module 2 still produces variable duty ratio binary system PPM signaling formats by current dutycycle
Electric signal；
Step203：In given timet w Regulation operation of the place to dutycycle terminates；
Data modulation control module 2 is with time interval Δ t It is the cycle, is repeatedly carried out step Step201 to step Step203 institutes
The operation of description, so as to realize the dutycycle to the electric signal of variable duty ratio binary system PPM signaling formats according to channel status
Self Adaptive Control, and then reach the purpose of the peak transmitted power for being adaptively adjusted laser pulse；
First laser communication receiving and transmitting terminals and second knot of laser communication receiving and transmitting terminalses of two-way atmosphere laser communication system
Structure is identical with the physical parameter of modules, the error rate index phase described in step Step101 and step Step201
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114333.2A CN106788770B (en) | 2016-12-07 | 2016-12-07 | According to the method for channel status automatic adjusument Atmospheric Laser Communications System transmission power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611114333.2A CN106788770B (en) | 2016-12-07 | 2016-12-07 | According to the method for channel status automatic adjusument Atmospheric Laser Communications System transmission power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106788770A true CN106788770A (en) | 2017-05-31 |
| CN106788770B CN106788770B (en) | 2018-12-11 |
Family
ID=58874677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611114333.2A Active CN106788770B (en) | 2016-12-07 | 2016-12-07 | According to the method for channel status automatic adjusument Atmospheric Laser Communications System transmission power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106788770B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800475A (en) * | 2017-11-10 | 2018-03-13 | 长春理工大学 | The signal time fluctuating RMS emittance measuring method of atmospheric turbulance optical transport channel |
| CN109167629A (en) * | 2017-06-30 | 2019-01-08 | 华为技术有限公司 | Transmit method, relevant device and the system of information |
| CN109361456A (en) * | 2018-11-20 | 2019-02-19 | 长春理工大学 | The signal fluctuation related coefficient measuring system and method for two-way atmospheric turbulance optical channel |
| CN109474421A (en) * | 2018-11-20 | 2019-03-15 | 长春理工大学 | From the atmospheric turbulance optical signal method on the downside for extracting shared random bit |
| CN110417468A (en) * | 2019-08-20 | 2019-11-05 | 长春光客科技有限公司 | Miniature self-service machine platform downlink data adaptive optical transmitting device and method |
| WO2020150196A1 (en) * | 2019-01-16 | 2020-07-23 | X Development Llc | Optical amplifier burst mode communication with variable duty cycle |
| CN112491547A (en) * | 2020-12-03 | 2021-03-12 | 长春理工大学 | Atmospheric turbulence optical channel shared random bit extraction system based on space diversity time-sharing gating |
| CN112787718A (en) * | 2020-12-25 | 2021-05-11 | 武汉邮电科学研究院有限公司 | Atmospheric laser communication rate adjusting method, device and system |
| CN112887025A (en) * | 2021-02-25 | 2021-06-01 | 八院云箭(北京)航天技术研究院有限公司 | Weak green light pulse communication enhancement system |
| CN113422651A (en) * | 2021-08-24 | 2021-09-21 | 南京英田光学工程股份有限公司 | Transmitting power self-adaptive laser communication terminal and power control method thereof |
| CN113671532A (en) * | 2021-08-10 | 2021-11-19 | 南京牧镭激光科技有限公司 | Self-adaptive multi-channel wind lidar system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61189039A (en) * | 1985-02-16 | 1986-08-22 | Matsushita Electric Ind Co Ltd | Transmitting device for optical space |
| CN103928836A (en) * | 2014-04-08 | 2014-07-16 | 中国科学院武汉物理与数学研究所 | All-solid-state laser capable of outputting three kinds of frequencies |
-
2016
- 2016-12-07 CN CN201611114333.2A patent/CN106788770B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61189039A (en) * | 1985-02-16 | 1986-08-22 | Matsushita Electric Ind Co Ltd | Transmitting device for optical space |
| CN103928836A (en) * | 2014-04-08 | 2014-07-16 | 中国科学院武汉物理与数学研究所 | All-solid-state laser capable of outputting three kinds of frequencies |
Non-Patent Citations (2)
| Title |
|---|
| J MINET 等: ""Enhanced correlation of received power-signal fluctuations in bidirectional optical links"", 《JOURNAL OF OPTICS》 * |
| 陈纯毅等: ""大气光通信中大气湍流影响抑制技术研究进展"", 《兵工学报》 * |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167629A (en) * | 2017-06-30 | 2019-01-08 | 华为技术有限公司 | Transmit method, relevant device and the system of information |
| CN109167629B (en) * | 2017-06-30 | 2020-10-16 | 华为技术有限公司 | Method, related equipment and system for transmitting information |
| CN107800475A (en) * | 2017-11-10 | 2018-03-13 | 长春理工大学 | The signal time fluctuating RMS emittance measuring method of atmospheric turbulance optical transport channel |
| CN107800475B (en) * | 2017-11-10 | 2019-12-24 | 长春理工大学 | Signal time fluctuation root-mean-square bandwidth measurement method for atmospheric turbulence optical transmission channel |
| CN109361456B (en) * | 2018-11-20 | 2021-01-01 | 长春理工大学 | Method for measuring signal fluctuation correlation coefficient of bidirectional atmospheric turbulence optical channel |
| CN109361456A (en) * | 2018-11-20 | 2019-02-19 | 长春理工大学 | The signal fluctuation related coefficient measuring system and method for two-way atmospheric turbulance optical channel |
| CN109474421A (en) * | 2018-11-20 | 2019-03-15 | 长春理工大学 | From the atmospheric turbulance optical signal method on the downside for extracting shared random bit |
| CN109474421B (en) * | 2018-11-20 | 2021-04-13 | 长春理工大学 | Method for extracting shared random bit from atmospheric turbulence optical signal fading |
| JP2022508331A (en) * | 2019-01-16 | 2022-01-19 | エックス デベロップメント エルエルシー | Burst mode communication of an optical amplifier with variable duty cycle |
| US10841015B2 (en) | 2019-01-16 | 2020-11-17 | X Development Llc | Optical amplifier burst mode communication with variable duty cycle |
| WO2020150196A1 (en) * | 2019-01-16 | 2020-07-23 | X Development Llc | Optical amplifier burst mode communication with variable duty cycle |
| US11909452B2 (en) | 2019-01-16 | 2024-02-20 | X Development Llc | Optical amplifier burst mode communication with variable duty cycle |
| JP7433376B2 (en) | 2019-01-16 | 2024-02-19 | エックス デベロップメント エルエルシー | Burst mode communication of optical amplifiers with variable duty cycle |
| US11159249B2 (en) | 2019-01-16 | 2021-10-26 | X Development Llc | Optical amplifier burst mode communication with variable duty cycle |
| US11611398B2 (en) | 2019-01-16 | 2023-03-21 | X Development Llc | Optical amplifier burst mode communication with variable duty cycle |
| JP7111902B2 (en) | 2019-01-16 | 2022-08-02 | エックス デベロップメント エルエルシー | Burst-mode communication of optical amplifiers with variable duty cycle |
| CN110417468B (en) * | 2019-08-20 | 2023-04-25 | 长春光客科技有限公司 | Adaptive optical transmission device and method for downlink data of unmanned aerial vehicle platform |
| CN110417468A (en) * | 2019-08-20 | 2019-11-05 | 长春光客科技有限公司 | Miniature self-service machine platform downlink data adaptive optical transmitting device and method |
| CN112491547A (en) * | 2020-12-03 | 2021-03-12 | 长春理工大学 | Atmospheric turbulence optical channel shared random bit extraction system based on space diversity time-sharing gating |
| CN112787718A (en) * | 2020-12-25 | 2021-05-11 | 武汉邮电科学研究院有限公司 | Atmospheric laser communication rate adjusting method, device and system |
| CN112787718B (en) * | 2020-12-25 | 2022-03-11 | 武汉邮电科学研究院有限公司 | Atmospheric laser communication rate adjusting method, device and system |
| CN112887025B (en) * | 2021-02-25 | 2023-02-07 | 八院云箭(北京)航天技术研究院有限公司 | Weak green light pulse communication enhancement system |
| CN112887025A (en) * | 2021-02-25 | 2021-06-01 | 八院云箭(北京)航天技术研究院有限公司 | Weak green light pulse communication enhancement system |
| CN113671532A (en) * | 2021-08-10 | 2021-11-19 | 南京牧镭激光科技有限公司 | Self-adaptive multi-channel wind lidar system |
| CN113422651B (en) * | 2021-08-24 | 2021-11-26 | 南京英田光学工程股份有限公司 | Transmitting power self-adaptive laser communication terminal and power control method thereof |
| CN113422651A (en) * | 2021-08-24 | 2021-09-21 | 南京英田光学工程股份有限公司 | Transmitting power self-adaptive laser communication terminal and power control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106788770B (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106788770B (en) | According to the method for channel status automatic adjusument Atmospheric Laser Communications System transmission power | |
| Man et al. | A low-cost 100GE optical transceiver module for 2km SMF interconnect with PAM4 modulation | |
| Pavan et al. | 50Gbit/s PAM-4 MMF transmission using 1060nm VCSELs with reach beyond 200m | |
| US11271649B2 (en) | Transceiver to transceiver digital optical commands | |
| Chang et al. | Link performance investigation of industry first 100G PAM4 IC chipset with real-time DSP for data center connectivity | |
| CN106788738A (en) | Passive optical network based on 2DcodedPAM4 modulation systems | |
| CN101490984B (en) | Reducing crosstalk in free-space optical communications | |
| Pottoo et al. | Performance investigation of optical communication system using FSO and OWC channel | |
| CN106961308B (en) | Optical transceiver unit, optical module, optical communication system and related parameter control method | |
| Khajwal et al. | Performance analysis of FSO-SISO and FSO-WDM systems under different atmospheric conditions | |
| US5602665A (en) | Optical transmitting/receiving apparatus for bidirectional communication systems | |
| CN108696315B (en) | Binary system space chaotic laser communication system based on high-order mode and control method | |
| Motaghiannezam et al. | 104 Gbps PAM4 transmission over OM3 and OM4 fibers using 850 and 880 nm VCSELs | |
| Jalil et al. | Design and implementation of PC to PC data transmission using wireless visible light communication system | |
| CN105009487B (en) | A kind of optical sender and light launching technique | |
| Motaghiannezam et al. | 51.56 Gbps PAM4 Transmission over up to 2.3 km OM4 Fiber using Mode Selective VCSEL | |
| Kruglov et al. | Eye-safe data transmission of 1.25 Gbit/s over 100-m SI-POF using green laser diode | |
| Kocot et al. | SWDM strategies to extend performance of VCSELs over MMF | |
| Yin et al. | First demonstration of real-time 100 Gbit/s 3-level duobinary transmission for optical interconnects | |
| Apolo et al. | Asymmetric hybrid full-duplex POF-based VLC transmission links | |
| Cano et al. | 6.25 Gb/s differential duobinary transmission in 2GHz BW limited direct phase modulated DFB for udWDM-PONs | |
| Karinou et al. | IM/DD vs. 4-PAM using a 1550-nm VCSEL over short-range SMF/MMF links for optical interconnects | |
| CN106330336A (en) | Device and method of adjusting modulator output optical signal power balance | |
| Al-Nahhal et al. | FSO-SIMO system with SIM-DPSK over log-normal atmospheric turbulence and misalignment | |
| Wang et al. | Real-Time 50Gb/s Upstream Transmission in TDM-PON with Class E1 Power Budget Using Ge/Si Avalanche Photodiode and Bismuth-Doped Fiber as Preamplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |