CN106788761B - A kind of mixed light coding method and device - Google Patents
A kind of mixed light coding method and device Download PDFInfo
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- CN106788761B CN106788761B CN201611133433.XA CN201611133433A CN106788761B CN 106788761 B CN106788761 B CN 106788761B CN 201611133433 A CN201611133433 A CN 201611133433A CN 106788761 B CN106788761 B CN 106788761B
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- 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
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- 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
- H04B10/508—Pulse generation, e.g. generation of solitons
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- 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
- H04B10/516—Details of coding or modulation
- H04B10/524—Pulse modulation
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- 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
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
- H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information
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- Optical Communication System (AREA)
Abstract
The invention belongs to technical field of photo communication, a kind of mixed light coding method and device are specifically provided, 1) method is comprising steps of being modulated laser pulse signal and being encoded by pulse-amplitude modulation mode PAM；2) PPM is modulated and encodes to control information in the way of pulse position modulation；3) mixing to laser pulse signal and control information is realized by laser composite wave device；4) mixed signal of laser pulse signal and control information is transmitted to phased laser array through optical fiber link；5) according to the difference of amplitude, laser pulse signal and control information are isolated by amplitude comparator；6) the phase adjustment unit array that phased laser array is controlled by control information, controls the direction of the launch of laser pulse.The present invention can not only guarantee make full use of in transmitting terminal using mixed light coding method the alignment precision of the raising aerial array of the time interval between laser pulse using high-power pulse type laser signal.
Description
Technical field
The invention belongs to technical field of photo communication, and in particular to a kind of mixed light coding method and device.
Background technique
In recent years, laser communication is due to the advantages such as big, electromagnetic compatibility, good confidentiality, flexibility height with capacity, on the one hand
The shortcomings that fiber optic communication is in terms of flexibility is overcome, on the other hand solves the disadvantage that radio communication in terms of capacity again,
Thus people the most value.
For a laser communication system, the function of transmitter is exactly the various forms of information generated by information source
It is modulated on light carrier, is launched by atmosphere or free space.There is big, road of decaying in signal transmission in laser communication
The problems such as diameter loss is big, transmitting antenna is influenced vulnerable to atmospheric oscillation or atmospheric turbulance.
In order to guarantee the accuracy of laser communication, the optical antenna of transmitting terminal can select suitable transmitting according to system requirements
Angle, but the influence due to atmospheric oscillation etc. to the direction of the launch, need to improve the alignment precision of aerial array.In order to increase letter
Number transmission range, reduce influence transmit to signal of decaying, improve the signal-to-noise ratio of receiving end, need to improve transmitting in transmitting terminal
Power generally emits laser signal by using the laser of pulsed in transmitting terminal recently as the development of laser
Have reached increase transmission power purpose, the laser of pulsed refer to single laser pulse width less than 0.25 second, at interval of
Certain time just works primary laser, it can use instantaneous laser signal and obtains biggish output power.
In traditional mobile laser communication, data information and control information are separated from each other, respectively transmit, and usually adopt
The transmission that data information is realized with laser pulse signal controls precisely aligning for light emitting antenna using control information, so
It needs two sets of different devices to realize data information respectively in transmitting terminal and controls the transmission of information, such two covering device is not only
It will increase the complexity of system, and will increase cost.
Summary of the invention
The purpose of the present invention is overcoming above-mentioned problems of the prior art, one kind is provided at laser pulse signal interval
Between insertion control information mixed light coding method and device, can use set of device realize data information and control letter
It is transmitted while breath, pulse-amplitude modulation (PAM) and pulse position modulation (PPM) realization pair is passed through using mixed light coding mode
The coding and modulation of laser pulse signal and control information, then laser pulse signal and control information are realized by laser composite wave device
Mixing.
The technical scheme is that a kind of mixed light coding method, includes the following steps:
(1) laser pulse signal is modulated and is encoded by pulse-amplitude modulation mode PAM；
(2) PPM is modulated and encodes to control information in the way of pulse position modulation；
(3) mixing to laser pulse signal and control information is realized by laser composite wave device；
(4) mixed signal of laser pulse signal and control information is transmitted to phased laser array through optical fiber link；
(5) according to the difference of amplitude, laser pulse signal and control information are isolated by amplitude comparator；
(6) the phase adjustment unit array that phased laser array is controlled by control information, controls the launch party of laser pulse
To.
Laser composite wave device described in above-mentioned steps (3) will be merged into according to the modulated control information of PPM modulation mode
In the pulse spacing of laser pulse signal, the mixing of control information and laser pulse signal is realized.
Amplitude comparator described in above-mentioned steps (5) be according to the control information with the amplitude information of laser pulse signal it
Between difference come realize control information and laser pulse signal separation.
Phase adjustment unit array described in above-mentioned steps (6) is to control each phase list according to the control information to realize
The phase-shift phase of member, the phase of control each unit output light wave is in particular directions.
A kind of mixed light code device, including laser pulse device, output end and the PAM modulator of the laser pulse device
Input terminal connection, the output end of PAM modulator and the output end of PPM modulation device connect with the input terminal of laser composite wave device respectively
Connect, the input terminal of the output end of laser composite wave device and optical fiber link connects, the output end of optical fiber link and amplitude comparator it is defeated
Enter end connection, the output end of amplitude comparator be separately connected PPM demodulator input terminal and phase adjustment unit array it is defeated
Enter end, the output end of PPM demodulator is connect with the input terminal of phase adjustment unit array, the output end of phase adjustment unit array
Connect the input terminal of collector lens.
Beneficial effects of the present invention: the present invention using mixed light coding method to laser pulse signal be added control information it
It can control the phase adjustment unit array of phased laser array afterwards, the direction of micro-adjustment laser pulse signal believes laser pulse
Number launch angle controlled within the zone of reasonableness of system always.Can not only it be guaranteed using mixed light coding method and device
In transmitting terminal using high-power pulse type laser signal, the phase adjustment unit of phased laser array can also be controlled simultaneously
Array, and then improve the alignment precision of aerial array.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is PPM modulation mode figure；
Fig. 2 is mixed light code symbols structure；
Fig. 3 is the system block diagram of mixed light code device；
Fig. 4 is method operational flowchart of the invention；
Fig. 5 is the mixing optical signal for controlling information and laser pulse signal.
Description of symbols: 1, laser pulse device；2, PAM modulator；3, PPM modulation device；4, laser composite wave device；5, optical fiber
Link；6, amplitude comparator；7, PPM demodulator；8, phase adjustment unit array；9, collector lens.
Specific embodiment
In optic communication, due to path loss, the influence of the factors such as ambient noise, transmitting terminal generally requires transmitting higher-wattage
Laser signal realize communication, and need to select suitable launch angle according to system requirements.Generally in order to obtain Gao Gong
The transmission power of rate, in transmitting terminal, we use the laser emitter of pulsed, and the laser of pulsed refers to single laser arteries and veins
Rush width less than 0.25 second, just work primary laser at interval of certain time, it can use instantaneous laser signal and obtains
Biggish output power is taken, since there is biggish time intervals between laser pulse, so we can be in these laser
Control bit is added in the time interval of pulse, not only can realize higher transmission power and can be realized simultaneously pair
The micro-adjustment in laser pulse emission direction.
Since laser pulse signal amplitude is larger and to control the amplitude of information smaller, amplitude comparator can be passed through
It distinguishes laser pulse signal and control information, the phase adjustment unit battle array of phased laser array is controlled eventually by control information
Column, and then control the direction of the launch of laser pulse.
The laser of pulsed mainly realizes instantaneous high power, therefore pulse and arteries and veins using short time pulse technique
There is certain time intervals between punching, in order to realize precisely aligning for the direction of the launch, when we can make full use of these
Between interval be added control information, the present invention is specifically that the control of fine tuning laser direction is added between the time interval of laser pulse
Information processed makes the laser signal direction of the launch of transmitting terminal meet the requirement of communication system always.Laser pulse signal is to pass through PAM
Modulation system encodes to be modulated, and the control information between laser pulse signal is to be encoded in the way of PPM to be modulated.
PAM modulation is pulse amplitude modulation, and principle is a kind of modulation system that the amplitude of pulse carrier changes with baseband signal.PPM tune
System is pulse position modulation, its principle is to make to generate PPM pulse signal by coding, is believed the laser pulse of laser transmitting
It number is modulated, realizes that PPM modulation is as shown in Figure 1 with 8-PPM modulation system in the present invention.
Assuming that the time interval between two laser pulse signals is fixed as T1, it is added between two laser pulse signals
The low level control information of carrying control information, is divided into T2 between the initial position in signal code source, mixed signal is passed via light
Transmission link is transmitted to phased laser array, and the phase adjustment unit array of phased laser array is controlled eventually by control information, into
And the direction of the launch of laser pulse is controlled, mixed light code symbols structure is as shown in Figure 2.
Referring to Fig. 3 and Fig. 4, mixed light coding method provided by the invention and device, mixed light coding method include such as
Lower step:
(1) laser pulse signal is modulated and is encoded by pulse-amplitude modulation mode (PAM)；
(2) control information is modulated and is encoded in the way of pulse position modulation (PPM)；Wherein control use of information
Be that PPM modulation mode is modulated coding, and due to the amplitude of laser pulse signal it is larger and control the amplitude of information compared with
It is small, so being easy to distinguish laser pulse signal and control information by the gap of amplitude.
(3) mixing to laser pulse signal and control information is realized by laser composite wave device；Laser composite wave device will be according to
The modulated control information of PPM modulation mode was merged into the pulse spacing of laser pulse signal, realized control information and laser
The mixing of pulse signal.
(4) mixed signal of laser pulse signal and control information is transmitted to phased laser array through optical fiber link；
(5) according to the difference of amplitude, laser pulse signal and control information are isolated by amplitude comparator；Amplitude compares
Device be according to the control information the difference between the amplitude information of laser pulse signal come realize control information and laser pulse letter
Number separation.
(6) the phase adjustment unit array that phased laser array is controlled by control information, controls the launch party of laser pulse
To；Phase adjustment unit array is to realize the phase-shift phase for controlling each phase unit according to the control information, controls each unit
Export the phase of light wave in particular directions.
Mixed light code device of the invention, including laser pulse device 1, the output end and PAM tune of the laser pulse device 1
The input terminal of device 2 processed connects, the output end of the output end of PAM modulator 2 and PPM modulation device 3 respectively with laser composite wave device 4
Input terminal connection, the output end of laser composite wave device 4 are connect with the input terminal of optical fiber link 5, the output end and amplitude of optical fiber link 5
The input terminal of comparator 6 connects, and the output end of amplitude comparator 6 is separately connected the input terminal and phase adjusted of PPM demodulator 7
The output end of the input terminal of cell array 8, PPM demodulator 7 is connect with the input terminal of phase adjustment unit array 8, phase adjusted
The input terminal of the output end connection collector lens 9 of cell array 8；The laser pulse device of this mixed light code device is by input signal
The laser signal for being converted into pulsed then passes through PAM modulator and is modulated according to PAM modulation system to laser pulse signal
Coding, and control information and be modulated and encode according to PPM modulation mode through PPM modulation device, control the laser of information and input
Pulse signal is merged by laser composite wave device, and the laser signal after merging is transmitted to amplitude comparator by optical fiber link,
Amplitude comparator separates laser pulse signal and control information according to the different of amplitude, then controls information and passes through PPM
Demodulator restores to be adjusted to original control information and to the phase unit array of laser pulse signal, then will be through phase
Laser pulse signal after adjusting cell array is input to collector lens, last outgoing laser beam.
The present invention is according to the concrete operation step of mixed light coding method, and apparatus of the present invention are as shown in figure 3, input signal passes through
Cross the laser signal that laser pulse device is converted to pulsed later, it is assumed that the laser pulse signal to be transmitted is compiled by PAM modulation
It is 110101110101 after code, it is assumed that the control information for adjusting laser direction is 010 after PPM modulation device modulating-coding
100 101 110 001 100 010 100 101 110 001, laser pulse signal with through PPM modulation encode control information
It is merged by laser composite wave device, the signal after merging is as shown in figure 5, due to laser pulse signal and control information amplitude phase
Difference is very big, so amplitude comparator can separate control information with laser pulse signal according to the different of the two amplitude, passes through
The control information and laser pulse signal that PPM demodulation restores enter phase adjustment unit array and realize control information to laser pulse
The fine adjustment of signal, the laser pulse signal being finally adjusted enter the output that collector lens carries out next step.
Therefore, the present invention is added after control information laser pulse signal using mixed light coding method and may be implemented to control
The phase adjustment unit array of phased laser array processed, the direction of micro-adjustment laser pulse signal make the transmitting of laser pulse signal
Angle is controlled always within the zone of reasonableness of system.Can not only it be guaranteed using mixed light coding method in transmitting terminal use
It is high-power pulse type laser signal, the phase adjustment unit array of phased laser array can also be controlled simultaneously, improves antenna
The alignment precision of array.
There is no the part described in detail to belong to the well known conventional means of the industry in present embodiment, does not chat one by one here
It states.The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all and sheet
Invent it is the same or similar design all belong to the scope of protection of the present invention within.
Claims (4)
1. a kind of mixed light coding method, which comprises the steps of:
(1) laser pulse signal is modulated and is encoded by pulse-amplitude modulation mode PAM；
(2) PPM is modulated and encodes to control information in the way of pulse position modulation；
(3) mixing to laser pulse signal and control information is realized by laser composite wave device: the laser composite wave device will be by
It is merged into the pulse spacing of laser pulse signal, realizes control information and swashs according to the modulated control information of PPM modulation mode
The mixing of light pulse signal；
(4) mixed signal of laser pulse signal and control information is transmitted to phased laser array through optical fiber link；
(5) according to the difference of amplitude, laser pulse signal and control information are isolated by amplitude comparator；
(6) the phase adjustment unit array that phased laser array is controlled by control information, controls the direction of the launch of laser pulse.
2. a kind of mixed light coding method as described in claim 1, which is characterized in that amplitude described in step (5) compares
Device be according to the control information the difference between the amplitude information of laser pulse signal come realize control information and laser pulse letter
Number separation.
3. a kind of mixed light coding method as described in claim 1, which is characterized in that phase adjusted described in step (6)
Cell array is to realize the phase-shift phase for controlling each phase unit according to the control information, the phase of control each unit output light wave
Position is in particular directions.
4. a kind of mixed light code device, which is characterized in that including laser pulse device (1), the output of the laser pulse device (1)
The output end of end and PPM modulation device (2) is connect with the input terminal of laser composite wave device (3) respectively, the output of laser composite wave device (3)
End is connect with the input terminal of optical fiber link (4), and the output end of optical fiber link (4) is connect with the input terminal of amplitude comparator (5), width
The output end of degree comparator (5) is separately connected the input of the input terminal and phase adjustment unit array (7) of PPM demodulator (6)
End, the output end of PPM demodulator (6) are connect with the input terminal of phase adjustment unit array (7), phase adjustment unit array (7)
Output end connection collector lens (8) input terminal.
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| CN201611133433.XA CN106788761B (en) | 2016-12-10 | 2016-12-10 | A kind of mixed light coding method and device |
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| CN201611133433.XA CN106788761B (en) | 2016-12-10 | 2016-12-10 | A kind of mixed light coding method and device |
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| CN110289907A (en) * | 2019-07-10 | 2019-09-27 | 中国科学院长春光学精密机械与物理研究所 | Laser communications method and system based on two-dimensional laser phased array |
| CN112821957B (en) * | 2021-01-05 | 2022-10-04 | 鹏城实验室 | Signal modulation method, demodulation method and optical communication system |
| CN116625166B (en) * | 2023-07-20 | 2023-10-03 | 西安松果电子科技有限公司 | Structure unwinding method and device for laser semi-active guide head |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8026837B1 (en) * | 2010-04-22 | 2011-09-27 | The Aerospace Corporation | Systems and methods for converting wideband signals in the optical domain |
| CN102576971A (en) * | 2009-10-02 | 2012-07-11 | Imra美国公司 | Optical signal processing with modelocked lasers |
| CN104993367A (en) * | 2015-06-25 | 2015-10-21 | 西安理工大学 | Wireless laser communication PPM modulator and method for synthesizing multi-light-source sequence thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576971A (en) * | 2009-10-02 | 2012-07-11 | Imra美国公司 | Optical signal processing with modelocked lasers |
| US8026837B1 (en) * | 2010-04-22 | 2011-09-27 | The Aerospace Corporation | Systems and methods for converting wideband signals in the optical domain |
| CN104993367A (en) * | 2015-06-25 | 2015-10-21 | 西安理工大学 | Wireless laser communication PPM modulator and method for synthesizing multi-light-source sequence thereof |
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Effective date of registration: 20211221 Address after: 710000 room 043, F2001, 20 / F, block 4-A, Xixian financial port, Fengdong new town energy gold trade zone, Xixian New District, Xi'an City, Shaanxi Province Patentee after: Shaanxi Jiashi Chuangda Information Technology Co.,Ltd. Address before: 710071 Xi'an Electronic and Science University, 2 Taibai South Road, Shaanxi, Xi'an Patentee before: XIDIAN University |
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