CN102439887A - Signal modulation device and method - Google Patents
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- CN102439887A CN102439887A CN2011800025840A CN201180002584A CN102439887A CN 102439887 A CN102439887 A CN 102439887A CN 2011800025840 A CN2011800025840 A CN 2011800025840A CN 201180002584 A CN201180002584 A CN 201180002584A CN 102439887 A CN102439887 A CN 102439887A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/06—Polarisation multiplex systems
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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
- H04B10/505—Laser transmitters using external modulation
- H04B10/5053—Laser transmitters using external modulation using a parallel, i.e. shunt, combination of modulators
Abstract
The present invention provides a signal modulation device and a signal modulation method, comprising an initial modulator and an analyzer. The signal output interface of the initial modulator is connected with the signal input interface of the analyzer, the initial modulator is used to generate a first code type signal which comprises a first polarization state signal and a second polarization state signal, and the analyzer is used to adjust the power projection ratio of the first polarization state signal and the second polarization state signal in an analyzing direction in the first code type signal when communicated with the initial modulator to thereby output a second code type signal corresponding to the ratio. In the signal modulation device and method of the invention, by arranging the initial modulator and the analyzer connected and cooperated with each other, switching can be carried out between different code-type modulation formats, so that the optimization of a link performance is realized.
Description
Technical field
The present invention relates to the optical-fiber network technology, particularly a kind of modulating apparatus and modulator approach.
Background technology
At present, can signal be modulated the back in backbone network, transmit through the modulator of multiple format modulation signal in the optical-fiber network.Common format modulation signal in the prior art; For example can comprise; Quadrature amplitude modulation (16Quadrature Amplitude Modulation; Be called for short: 16QAM) (Differential Quadrature Phase Shift Keying, be called for short: DQPSK) (Binary Phase Shift Keying is called for short: BPSK) modulator etc. for modulator, two-phase PSK for modulator, four-phase DPSK.Said modulator can be to input signal according to certain power than beam split, and carry out opto-electronic conversion, electric bit sequence data-signal is mapped on each phase place of light carrier, with each beam split according to the preset phase back output corresponding modulation signal that superposes.
But above-mentioned signal is modulated existing technological deficiency and is, present modulator all can only generate a kind of modulation signal, and for example, the 16QAM modulator can only generate the 16QAM signal, and the DQPSK modulator can only generate DQPSK signal etc.; And present link transmission performance is in continuous variation; Accordingly format modulation signal also there is different demands; For example, the low-order-modulated signal can be adopted during the link transmission performance difference, high order modulation signal can be adopted when link transmission performance is excellent; If this moment, modulator still can only generate the low-order-modulated signal, then obviously will influence the performance of link performance.
Summary of the invention
The purpose of this invention is to provide a kind of modulating apparatus and modulator approach, to realize to generate the signal of different modulating form.
One side of the present invention provides a kind of modulating apparatus, comprising: initial modulation device and analyzer, and the signal output interface of said initial modulation device connects the signal input interface of said analyzer;
Said initial modulation device is used to generate first yard type signal, and said first yard type signal comprises the first polarization state signal and the second polarization state signal;
Said analyzer; Be used for when being communicated with said initial modulation device; Adjust first polarization state signal described in said first yard type signal and the said second polarization state signal ratio, with the output second yard type signal corresponding with said ratio in the power projection of analyzing direction.
Another aspect of the present invention provides a kind of signal modulating method, comprising:
Through the initial modulation device, generate first yard type signal, said first yard type signal comprises the first polarization state signal and the second polarization state signal;
Be communicated with analyzer and said initial modulation device; And adjust the first polarization state signal described in said first yard type signal and the said second polarization state signal ratio in the power projection of analyzing direction through said analyzer, with the output second yard type signal corresponding with said ratio.
Modulating apparatus of the present invention and modulator approach through initial modulation device and the analyzer that setting is connected and cooperates, make and can between different sign indicating number type modulation formats, switch, and have realized the optimization of link performance.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; The accompanying drawing of required use is done an introduction simply in will describing embodiment below; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of modulating apparatus embodiment one of the present invention;
Fig. 2 is the structural representation of modulating apparatus embodiment two of the present invention;
Fig. 3 is the signal modulation sketch map of modulating apparatus embodiment two of the present invention;
Fig. 4 is the structural representation of modulating apparatus embodiment three of the present invention;
Fig. 5 is the signal modulation sketch map of modulating apparatus embodiment three of the present invention;
Fig. 6 is the schematic flow sheet of signal modulating method embodiment of the present invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer; To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention carried out clear, intactly description, obviously; Described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.
Main technical schemes of the present invention does, the modulating apparatus of the combining structure through the integrated analyzer of initial modulation device makes this initial modulation device itself can generate first yard type signal; And when analyzer is communicated with the initial modulation device; Whole modulating apparatus can be exported second yard type signal; Thereby this modulating apparatus can be suitable for the various signals modulation format, is convenient to switch between different sign indicating number types according to the transmission performance of link, realizes the maximization of link performance.
Through accompanying drawing and specific embodiment, technical scheme of the present invention is done further detailed description below.
Embodiment one
Fig. 1 is the structural representation of modulating apparatus embodiment one of the present invention; As shown in Figure 1; The modulating apparatus of present embodiment can comprise initial modulation device 11 and analyzer 12; This analyzer 12 is the analyzer of angle adjustable, and the signal input interface of this analyzer 12 connects the signal output interface of initial modulation device 11.
Wherein, initial modulation device 11 can be present several kinds of common modulators.For example, (polarization division multiplexing-Quadrature Phase Shift Keying is called for short: PDM-QPSK) modulator, PDM-BPSK modulator etc. palarization multiplexing-QPSK; The operation principle of said modulator is identical with prior art, is conventional modulator, therefore repeats no more; The corresponding modulation device can generate corresponding modulation signal, and for example, the PDM-QPSK modulator can generate the PDM-QPSK signal, and the PDM-BPSK modulator can generate PDM-BPSK signal etc., and the signal of above-mentioned generation can be called first yard type signal.
For example, generate in the process of PDM-QPSK signal at the PDM-QPSK modulator, light signal is divided into two-way after entering into the PDM-QPSK modulator: the one tunnel is the light signal of X polarization state, and another road is the light signal of Y polarization state; This two ways of optical signals enters into two qpsk modulators respectively and modulates then, obtains two-way QPSK signal, is respectively the QPSK signal of X polarization state and the QPSK signal of Y polarization state; At last this two-way QPSK signal is synthesized, obtain the PDM-QPSK signal.Wherein, can have certain phase difference between the above-mentioned two-way QPSK signal, for example, the phase difference between the QPSK signal of X polarization state and the QPSK light signal of Y polarization state can be the integral multiple of 90 degree.
When analyzer 12 was communicated with initial modulation device 11, first yard type signal by the signal output interface of initial modulation device 11 is exported can get in the analyzer 12 via the signal input interface of analyzer 12.Wherein, described first yard type signal comprises the first polarization state signal and the second polarization state signal; Analyzer 12 can be used for when being communicated with initial modulation device 11, adjusts the first polarization state signal and the second polarization state signal in first yard type signal in the ratio of the power projection of analyzing direction, with the output second yard type signal corresponding with said ratio.
Wherein, need to prove that second yard type signal of present embodiment indication can change.For example, when adjustment analyzer when making that the ratio of said power projection is A, output be second yard type signal of first modulation format; When adjustment analyzer when making that the ratio of said power projection is B, output be second yard type signal of second modulation format.
In the present embodiment,, can realize the sign indicating number type modulation format that this modulating apparatus is compatible different simultaneously through setting be connected initial modulation device 11 and analyzer 12 with cooperating.For example, when link performance is low, can close the use of analyzer 12, only by first yard type signal of initial modulation device 11 outputs; When link performance is higher, can start analyzer 12, make analyzer 12 be communicated with initial modulation device 11, generate second yard type signal of higher-order, thereby realize between different sign indicating number types, switching the performance of optimization link performance according to link performance.
Wherein, need to prove that present embodiment does not limit the method for using of this modulating apparatus.For example, a control switch can be set on analyzer 12, perhaps close, thereby realize being communicated with or disconnection of analyzer 12 and initial modulation device 11 with the startup of control analyzer 12; Perhaps; Also receiver module and processing module can be set on this modulating apparatus; Through receiver module obtain the place link the transmission performance parameter (for example; OSNR (Optical Signal Noise Ratio is called for short: OSNR)) is through the transmission performance parameter of processing module according to said link; Control said analyzer and be communicated with, and the control analyzer is adjusted the first polarization state signal and the second polarization state signal in first yard type signal that said initial modulation device generates in the ratio of the power projection of analyzing direction with said initial modulation device.Those skilled in the art also can be provided with other control mode according to actual needs.
The modulating apparatus of present embodiment through initial modulation device and the analyzer that setting is connected and cooperates, makes and can between different sign indicating number type modulation formats, switch, and has realized the optimization of link performance.
On the basis of embodiment one, following embodiment two is example with embodiment three with two kinds of concrete modulation systems, and technical scheme of the present invention is described; Wherein, below be for example, but in actual the use, be not limited to following modulator and modulation format, also be not limited to two kinds of sign indicating number types with the compatible two kinds of sign indicating number types of this modulating apparatus.
Embodiment two
Fig. 2 is the structural representation of modulating apparatus embodiment two of the present invention, and Fig. 3 is the signal modulation sketch map of modulating apparatus embodiment two of the present invention.Present embodiment is to be example with compatible PDM-QPSK sign indicating number type signal of this modulating apparatus and 16QAM sign indicating number type signal, and wherein, the initial modulation device is the PDM-QPSK modulator.As shown in Figure 2, the modulating apparatus of present embodiment can comprise PDM-QPSK modulator 21 and analyzer 22.
Wherein, PDM-QPSK modulator 21 is conventional modulator; Can comprise light signal transmitting terminal laser diode (laser diode; Be called for short: LD) 211, (polarization beam splitter is called for short: PBS) 212, (polarization beam combiner is called for short: PBC) 214 devices such as grade for qpsk modulator 213 and polarization beam combiner polarization beam apparatus.Above-mentioned LD211 is used to produce laser, and PBS212 is used for incident light is carried out beam split according to X, two polarization states of Y, and PBC214 is used for the light of X, two polarization states of Y is closed light, and PDM wherein representes the mode of palarization multiplexing.
The light signal of light signal transmitting terminal LD211 output is divided into two-way by PBS212, for example the second road light signal b of the first via light signal a of the X polarization state shown in Fig. 2 and Y polarization state; This two ways of optical signals of a and b enters into two qpsk modulators 213 respectively and modulates respectively, and two qpsk modulators 213 can be exported the QPSK signal of X and two polarization states of Y; Below the second road light signal b revolved and turn 90 degrees (also can rotate 0 degree) by phase control device 215, making the QPSK signal of X and two polarization states of Y have the preset phase difference is that 90 degree or 0 are spent; Obtain the PDM-QPSK signal through PBC214 is synthetic at last, then corresponding, can being called this PDM-QPSK signal, to have above-mentioned preset phase poor, and this PDM-QPSK signal can be called first yard type signal.
As shown in Figure 3; After the PDM-QPSK signal of PDM-QPSK modulator 21 outputs, the analyzer 22 of connection can be through regulating this analyzer 22; The splitting ratio of realizing the PDM-QPSK signal is 1: 4; Be that the above-mentioned a and the ratio of the power projection of b two-way QPSK signal on the analyzing direction of analyzer are 1: 4 or 4: 1, at last these analyzer 22 outputs be the 16QAM signal, this 16QAM signal can be called second yard type signal.
The modulating apparatus of present embodiment through initial modulation device and the analyzer that setting is connected and cooperates, has been realized the switching of PDM-QPSK signal to the 16QAM signal.
Embodiment three
Fig. 4 is the structural representation of modulating apparatus embodiment three of the present invention, and Fig. 5 is the signal modulation sketch map of modulating apparatus embodiment three of the present invention.Present embodiment is to be example with compatible PDM-BPSK sign indicating number type signal of this modulating apparatus and QPSK sign indicating number type signal, and wherein, the initial modulation device is the PDM-BPSK modulator.As shown in Figure 4, the modulating apparatus of present embodiment can comprise PDM-BPSK modulator 31 and analyzer 32.
Wherein, PDM-BPSK modulator 31 is conventional modulator, can comprise devices such as light signal transmitting terminal LD311, BPSK modulator 312, PBS314 and PBC315.Above-mentioned LD311 is used to produce laser, and PBS314 is used for incident light is carried out beam split according to X, two polarization states of Y, and PBC315 is used for the light of X, two polarization states of Y is closed light, and PDM wherein representes the mode that polarization share.
The light signal of light signal transmitting terminal LD311 output is divided into two-way, comprising the first via light signal c of X polarization state, and the second road light signal d of Y polarization state.This two ways of optical signals of c and d enters into two BPSK modulators 312 respectively and modulates respectively, and two BPSK modulators 312 can be exported the bpsk signal of X and two polarization states of Y.The second road light signal c is then revolved by phase control device 313 and turn 90 degrees, at last through the synthetic PDM-BPSK signal of PBC device; Then corresponding, can be called this PDM-BPSK signal and have above-mentioned preset phase and differ from 90 degree, and this PDM-BPSK signal can be called first yard type signal.
As shown in Figure 5; After the PDM-BPSK signal of PDM-BPSK modulator 31 outputs, the analyzer 32 of connection can be through regulating this analyzer 32; The splitting ratio of realizing the PDM-BPSK signal is 1: 1; The ratio of the power projection of two-way bpsk signal on the analyzing direction of analyzer that promptly two BPSK modulators 312 are corresponding is 1: 1, at last these analyzer 32 outputs be the QPSK signal, this QPSK signal can be called second yard type signal.
The modulating apparatus of present embodiment through initial modulation device and the analyzer that setting is connected and cooperates, has been realized the switching of PDM-BPSK signal to the QPSK signal.
Embodiment four
Fig. 6 is the schematic flow sheet of signal modulating method embodiment of the present invention, and the method for present embodiment can adopt the modulating apparatus of any embodiment of the present invention to realize, wherein, this method simple declaration specifically can combine referring to device embodiment said.As shown in Figure 6, can may further comprise the steps:
For example, this initial modulation device can be the PDM-QPSK modulator, can generate the PDM-QPSK signal accordingly, and this PDM-QPSK signal comprises the QPSK signal of first polarization state and the QPSK signal of second polarization state;
Perhaps, this initial modulation device also can be the PDM-BPSK modulator, can generate the PDM-BPSK signal accordingly, and this PDM-BPSK signal comprises the bpsk signal of first polarization state and the bpsk signal of second polarization state.
For example; When being the PDM-QPSK modulator corresponding to the initial modulation device; Can adjust the QPSK signal of first polarization state in the PDM-QPSK signal and the QPSK signal of second polarization state is 1: 4 or 4: 1 in the ratio of the power projection of analyzing direction through analyzer; With output 16QAM signal, said 16QAM signal is second yard type signal;
Perhaps; When being the PDM-BPSK modulator corresponding to the initial modulation device; Can adjust the bpsk signal of first polarization state in the PDM-BPSK signal and the bpsk signal of second polarization state is 1: 1 in the ratio of the power projection of analyzing direction through analyzer; With output QPSK signal, said QPSK signal is second yard type signal.
In addition, present embodiment does not limit the method for using of this modulating apparatus.For example, a control switch can be set on analyzer, perhaps close, thereby realize being communicated with or disconnection of analyzer and initial modulation device with the startup of control analyzer;
Perhaps, also receiver module and processing module can be set on this modulating apparatus; Obtain the transmission performance parameter of place link through receiver module; Through the transmission performance parameter of processing module according to said link; Control said analyzer and be communicated with, and adjust the first polarization state signal and the second polarization state signal in first yard type signal that said initial modulation device generates in the ratio of the power projection of analyzing direction with said initial modulation device.Those skilled in the art also can be provided with other control mode according to actual needs.
The signal modulating method of present embodiment through initial modulation device and the analyzer that setting is connected and cooperates, makes and can between different sign indicating number type modulation formats, switch, and has realized the optimization of link performance.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (10)
1. a modulating apparatus is characterized in that, comprising: initial modulation device and analyzer, and the signal output interface of said initial modulation device connects the signal input interface of said analyzer;
Said initial modulation device is used to generate first yard type signal, and said first yard type signal comprises the first polarization state signal and the second polarization state signal;
Said analyzer; Be used for when being communicated with said initial modulation device; Adjust first polarization state signal described in said first yard type signal and the said second polarization state signal ratio, with the output second yard type signal corresponding with said ratio in the power projection of analyzing direction.
2. modulating apparatus according to claim 1 is characterized in that, said initial modulation device is palarization multiplexing-quadrature phase shift keyed modulators;
Said palarization multiplexing-quadrature phase shift keyed modulators specifically is used to generate palarization multiplexing-QPSK signal; Said first yard type signal is specially said palarization multiplexing-QPSK signal, comprises the QPSK signal of first polarization state and the QPSK signal of second polarization state;
Said analyzer; Specifically being used for adjusting the said palarization multiplexing-QPSK signal of QPSK signal first polarization state and the QPSK signal of second polarization state is 1: 4 or 4: 1 in the ratio of the power projection of said analyzing direction, with the output orthogonal am signals; Said second yard type signal is specially said quadrature amplitude modulation signal.
3. modulating apparatus according to claim 1 is characterized in that, said initial modulation device is palarization multiplexing-two-phase PSK modulator;
Said palarization multiplexing-two-phase PSK modulator; Specifically be used to generate palarization multiplexing-two-phase PSK signal; Said first yard type signal is specially said palarization multiplexing-two-phase PSK signal, comprises the two-phase PSK signal of first polarization state and the two-phase PSK signal of second polarization state;
Said analyzer; Specifically being used for adjusting the said palarization multiplexing-two-phase PSK signal of two-phase PSK signal first polarization state and the two-phase PSK signal of second polarization state is 1: 1 in the ratio of the power projection of said analyzing direction, with the output orthogonal phase shift keyed signal; Said second yard type signal is specially said QPSK signal.
4. according to each described modulating apparatus of claim 1 to 3, it is characterized in that said analyzer is provided with control switch;
Said control switch is used to control the startup of said analyzer or cut out, and breaks off to realize said analyzer and being communicated with perhaps of initial modulation device.
5. according to each described modulating apparatus of claim 1 to 3, it is characterized in that said modulating apparatus is provided with receiver module and processing module;
Said receiver module is used to obtain the transmission performance parameter that modulating apparatus belongs to link;
Said processing module; Be used for transmission performance parameter according to said link; Control said analyzer and be communicated with, and control said analyzer and adjust the first polarization state signal and the second polarization state signal in first yard type signal that said initial modulation device generates in the ratio of the power projection of analyzing direction with said initial modulation device.
6. a signal modulating method is characterized in that, comprising:
Through the initial modulation device, generate first yard type signal, said first yard type signal comprises the first polarization state signal and the second polarization state signal;
Be communicated with analyzer and said initial modulation device; And adjust the first polarization state signal described in said first yard type signal and the said second polarization state signal ratio in the power projection of analyzing direction through said analyzer, with the output second yard type signal corresponding with said ratio.
7. signal modulating method according to claim 6 is characterized in that,
First yard type signal of said generation; Be specially: generate palarization multiplexing-QPSK signal; Said first yard type signal is specially said palarization multiplexing-QPSK signal, comprises the QPSK signal of first polarization state and the QPSK signal of second polarization state;
The first polarization state signal and the said second polarization state signal are in the ratio of the power projection of analyzing direction described in the said first yard type signal of said adjustment; With the output second yard type signal corresponding with said ratio; Be specially: adjusting the QPSK signal of first polarization state in said palarization multiplexing-QPSK signal and the QPSK signal of second polarization state is 1: 4 or 4: 1 in the ratio of the power projection of said analyzing direction, with the output orthogonal am signals; Said second yard type signal is specially said quadrature amplitude modulation signal.
8. signal modulating method according to claim 6 is characterized in that,
First yard type signal of said generation; Be specially: generate palarization multiplexing-two-phase PSK signal; Said first yard type signal is specially said palarization multiplexing-two-phase PSK signal, comprises the two-phase PSK signal of first polarization state and the two-phase PSK signal of second polarization state;
The first polarization state signal and the said second polarization state signal are in the ratio of the power projection of analyzing direction described in the said first yard type signal of said adjustment; With the output second yard type signal corresponding with said ratio; Be specially: adjusting the two-phase PSK signal of first polarization state in said palarization multiplexing-two-phase PSK signal and the two-phase PSK signal of second polarization state is 1: 1 in the ratio of the power projection of said analyzing direction, with the output orthogonal phase shift keyed signal; Said second yard type signal is specially said QPSK signal.
9. according to each described signal modulating method of claim 6 to 8, it is characterized in that, also comprise:
Through being arranged on the control switch on the said analyzer, controlling the startup of said analyzer and perhaps close, to realize being communicated with or disconnection of said analyzer and initial modulation device.
10. according to each described signal modulating method of claim 6 to 8, it is characterized in that, also comprise:
Obtain the transmission performance parameter of modulating apparatus place link;
Transmission performance parameter according to said link; Control said analyzer and be communicated with, and adjust the first polarization state signal and the second polarization state signal in first yard type signal that said initial modulation device generates in the ratio of the power projection of analyzing direction with said initial modulation device.
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| PCT/CN2011/080880 WO2012163008A1 (en) | 2011-10-18 | 2011-10-18 | Signal modulation device and modulation method |
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| CN106899531A (en) * | 2017-03-01 | 2017-06-27 | 西安电子科技大学 | A kind of method of identification satellite modulation mode of communication signal |
| CN112565138A (en) * | 2020-12-11 | 2021-03-26 | 武汉邮电科学研究院有限公司 | Signal modulation transmission method and device |
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| CN101895495A (en) * | 2010-07-15 | 2010-11-24 | 北京邮电大学 | Method and system for transmitting and receiving by orthogonally dual-polarized differential quaternary phase shift keying |
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| CN102439887B (en) | 2015-01-07 |
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