CN204442384U - A kind of multi-source laser binary phase modulation and demodulation device - Google Patents
A kind of multi-source laser binary phase modulation and demodulation device Download PDFInfo
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- CN204442384U CN204442384U CN201520166497.4U CN201520166497U CN204442384U CN 204442384 U CN204442384 U CN 204442384U CN 201520166497 U CN201520166497 U CN 201520166497U CN 204442384 U CN204442384 U CN 204442384U
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Abstract
The utility model discloses a kind of multi-source laser binary phase modulation and demodulation device, comprise binary phase modulate emission device and binary phase demodulation receiving system, the plural LASER Light Source that binary phase modulate emission device comprises different wave length and the modulates information master controller be connected with LASER Light Source for controlling the every luminescent composition in a flash of LASER Light Source, binary phase demodulation receiving system comprises laser-sensitive unit and is connected the demodulates information master controller for identifying the LASER Light Source luminescent composition that described laser-sensitive unit receives with laser-sensitive unit.The information flow gathered and data set are contrasted by signal indication unit by the utility model, the light source providing corresponding modulating combines, carry out transient state information expression, the information preset is sent on follow-up signal processing unit by reception, determination step, thus is realized the multi-source binary phase modulation and demodulation of signal by laser intelligence transmitting element by receiving element simultaneously.
Description
Technical field
The utility model relates to laser transmission binary phase modulation and demodulation device technique field, especially efficient expansion binary phase modulation and demodulation device and method.
Background technology
Modulating and demodulating signal mode is related to the efficiency that information transmits in media as well, and current research mainly concentrates on ultra broadband and MIMO (MIMO system) etc., and Main Means realizes signal high efficiency of transmission by radio or laser.Fast and effeciently transmit information, reduce the resource that information transmission uses, limited bandwidth resources can be made to be fully utilized, but, towards the method and apparatus research and development of short-range laser intelligence transmission efficient modulation or one piece of blank, detection under special test environment and equipment operating environment and information interaction are safety in production, the necessary links ensureing rescue, reduce the impact of any one transmitting procedure on other transmitting procedures, have important economy and technical effect.
Along with the development and application of sensor technology, the transducers such as the multichannel from the transducer of initial single channel to the modern times is optical, electrical, sound, the transinformation also corresponding growth of corresponding acquisition.But, any efficient information modulation-demodulation technique, there is its precision and measure limitation, and signal is by environmental interference, to from the multiple unlike signal generator of Same Scene and transducer, because its signal generator is identical with measuring principle with the type of transducer, even if there is interference, the information gap degree obtained is larger.
Utility model content
Primary and foremost purpose of the present utility model is to provide one to comprise multiple LASER Light Source, multiple photosensitive receiving element, multi-source laser binary phase modulation and demodulation apparatus and method.
For achieving the above object, the utility model have employed following technical scheme:
A kind of multi-source laser binary phase modulation and demodulation device, comprise binary phase modulate emission device and binary phase demodulation receiving system, it is characterized in that: the plural LASER Light Source that described binary phase modulate emission device comprises different wave length and the modulates information master controller be connected with described LASER Light Source for controlling the every luminescent composition in a flash of described LASER Light Source, the demodulates information master controller that described binary phase demodulation receiving system comprises laser-sensitive unit for receiving described LASER Light Source luminescent composition more than two and is connected with described laser-sensitive unit for identifying the LASER Light Source luminescent composition that described laser-sensitive unit receives.
Described laser-sensitive unit is positioned on the receiving surface of a receiving element body, described laser-sensitive unit front is provided with narrow band filter slice, described demodulates information master controller comprises cell controller and signal differentiates detector, by cell controller and signal, the output of described laser-sensitive unit differentiates that the input of detector is connected.
Described laser occurring source unit adopts LD LASER Light Source.
Described laser-sensitive unit is photodiode.
A kind of multi-source laser binary phase modulation and demodulation method, it is characterized in that: comprise phase-modulating step and phase demodulating step, the information flow gathered and data set are contrasted by signal madulation master controller by described phase-modulating step, provide the LASER Light Source luminescent composition of corresponding modulating, carry out transient state information expression; Described phase demodulating step judges to the LASER Light Source luminescent composition that laser-sensitive unit receives the demodulation realizing signal by demodulates information master controller.
Described signal receiving step concrete grammar is:
1), signal madulation master controller calculates the transmitting allocation plan of moment multi-source LASER Light Source according to information flow and EBPSK modulation system;
2), signal madulation master controller carries out signal transmission according to allocation plan to multi-source Laser emission group, specific to each LASER Light Source, judges whether carry out light source transmitting in this moment, if the determination result is YES, then start LASER Light Source according to allocation plan; Otherwise do not do any operation.
Described phase demodulating step concrete grammar is: in laser-sensitive unit judges emitter, whether corresponding wavelength is at this instantaneous transmission laser, if the determination result is YES, then signal differentiates that the output voltage of detector changes, if judged result is no, then maintains and differentiate that the output voltage of detector is constant; Transient optical judged result according to differentiating that the situation of change of detector output voltage carries out transient optical judgement, and is converted into information combination by demodulates information master controller.
Compared with prior art, the utility model adopts modulation master controller end to carry out permutation and combination to N number of LASER Light Source, if adopt N number of light source, each LASER Light Source has launches and does not launch two states, has 2 altogether
nplant configuration mode, represent the information of primary modulation pulse representative.EBPSK modulation has ultra-narrow band feature, and when miniature laser modulation of source maximum rate is constant, multi-source mode can improve the amount of information of transmission.
The utility model adopts modulation /demodulation design, and have lightweight, information transfer efficiency is high, and volume is little, portable advantage.
Accompanying drawing explanation
Fig. 1 is the utility model device schematic diagram;
Fig. 2 is the utility model schematic diagram of device;
Fig. 3 is multi-source LASER Light Source modulates information schematic diagram;
Fig. 4 is the corresponding schematic diagram of multi-source LASER Light Source information;
Fig. 5 is operational process schematic diagram of the present utility model.
Embodiment
A kind of multi-source laser binary phase modulation and demodulation apparatus and method, comprise phase-modulation emitter 1 and phase demodulating receiving system 2, see Fig. 1.Wherein modulate emission device comprises the laser occurring source of multiple different wave length, and these emission sources are arranged at the multiple interval, position that is uniformly distributed of emitter, and its input is signal stream, be connected with laser occurring source through signal indication unit, wavelength comprises 532nm, 650nm, 1064nm, 780nm, etc.
Receiving element body is positioned on receiving surface and multiple laser-sensitive unit is installed, there is narrow band filter slice in each laser-sensitive unit front, with by cell controller and signal, laser-sensitive unit output differentiates that the input of detector is connected, signal differentiates that the output of detector is connected with signal transacting end by interface.
Laser occurring source unit adopts LD LASER Light Source.Laser-sensitive unit adopts photodiode.
Multi-source laser binary phase modulator approach, the information flow gathered and data set are contrasted by signal indication unit by the utility model, the light source providing corresponding modulating combines, carry out transient state information expression, the information preset is sent on follow-up signal processing unit by reception, determination step, thus is realized the multi-source binary phase modulation and demodulation of signal by laser intelligence transmitting element by receiving element simultaneously.
Multi-source laser is independent of one another, all adopts the work of EBPSK modulation system.
Extended binary phase shift keying (the EBPSK:Extended Binary PhaseShift Keying) modulation of each light source is defined as follows:
g
0(t)＝A sin 2πf
ct， 0≤t＜T
Wherein, g
0(t) and g
1t () represents the modulation waveform of code element " 0 " and " 1 " respectively; Code-element period T=N/f
ccontinue for N>=1 carrier cycle, the modulating time length τ=K/f of " 1 " code element
ccontinue for the N number of carrier cycle of K <; Carrier modulation is because of wide and different during modulation, and τ: T=K: N can be described as " modulation duty cycle ".EBPSK modulation signal is except the saltus step that the section start in data " 1 " has anti-phase and amplitude A+B in short-term, and all the other are all continuous sine waves, and this contributes to concentrating on carrier frequency place.
Modulation master controller end carries out permutation and combination to multiple LASER Light Source, if adopt 10
Light source is then:
Wherein 10 represent 10 lasing fluorescence light sources, and 2 represent that each LASER Light Source has launches and does not launch two states, and 1024 indicate 1024 kinds of configuration modes, represent the information of primary modulation pulse representative.As schematically shown in Figure 3, the light source wherein representated by A, B, C, D, E, F, G, H, I, J as shown in Figure 4 in its combination.
As shown in Figure 5, multi-source laser binary phase modulation and demodulation apparatus and method, this system comprises the step of following order:
First step power-up initializing;
Second step master controller calculates moment multi-source Laser emission allocation plan according to information flow and EBPSK modulation system.
3rd step master controller carries out signal transmission according to allocation plan to multi-source Laser emission group, specific to each LASER Light Source, judges whether carry out light source transmitting in this moment, if the determination result is YES, then start LASER Light Source according to allocation plan; Otherwise do not do any operation;
4th step is in demodulation receiving system, photodiode after filter judges that in emitter, whether corresponding wavelength is at this instantaneous transmission laser, if the determination result is YES, then corresponding current voltage changes, demodulation master controller receives after each wavelength signals sensitivity judges and carries out carry information differentiation, photodiode judged result after filter is no, then maintain primary current voltage constant, and demodulation master controller also obtains the photosensitive diode pair LASER Light Source of each wavelength and judges.
In a word, the utility model is by multiple different wave length LASER Light Source, under the instruction of modulation main control unit, permutation and combination is luminous, information entrained by the photo-sensor demodulation again, all light sources send information according to ultra-narrow band modulation system, the planning information of prior design and combination of light sources representation relation, demodulating algorithm will be given in demodulation main control unit and carry out judgement decision-making.The utility model adopts simple designs, and volume is little, is easy to carry.
Claims (4)
1. a multi-source laser binary phase modulation and demodulation device, comprise binary phase modulate emission device and binary phase demodulation receiving system, it is characterized in that: the plural LASER Light Source that described binary phase modulate emission device comprises different wave length and the modulates information master controller be connected with described LASER Light Source for controlling the every luminescent composition in a flash of described LASER Light Source, the demodulates information master controller that described binary phase demodulation receiving system comprises laser-sensitive unit for receiving described LASER Light Source luminescent composition more than two and is connected with described laser-sensitive unit for identifying the LASER Light Source luminescent composition that described laser-sensitive unit receives.
2. multi-source laser binary phase modulation and demodulation device according to claim 1, it is characterized in that: described laser-sensitive unit is positioned on the receiving surface of a receiving element body, described laser-sensitive unit front is provided with narrow band filter slice, described demodulates information master controller comprises cell controller and signal differentiates detector, by cell controller and signal, the output of described laser-sensitive unit differentiates that the input of detector is connected.
3. multi-source laser binary phase modulation and demodulation device according to claim 1, is characterized in that: described laser occurring source unit adopts LD LASER Light Source.
4. multi-source laser binary phase modulation and demodulation device according to claim 1, is characterized in that: described laser-sensitive unit is photodiode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520166497.4U CN204442384U (en) | 2015-03-23 | 2015-03-23 | A kind of multi-source laser binary phase modulation and demodulation device |
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| CN201520166497.4U CN204442384U (en) | 2015-03-23 | 2015-03-23 | A kind of multi-source laser binary phase modulation and demodulation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683036A (en) * | 2015-03-23 | 2015-06-03 | 东南大学 | Multisource laser binary phase modulating and demodulating device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683036A (en) * | 2015-03-23 | 2015-06-03 | 东南大学 | Multisource laser binary phase modulating and demodulating device and method |
| CN104683036B (en) * | 2015-03-23 | 2017-07-28 | 东南大学 | A kind of many source laser binary phase modulation and demodulation device and methods |
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