CN108880691A - Method, equipment and computer-readable medium for demodulated signal - Google Patents
Method, equipment and computer-readable medium for demodulated signal Download PDFInfo
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- CN108880691A CN108880691A CN201710330758.5A CN201710330758A CN108880691A CN 108880691 A CN108880691 A CN 108880691A CN 201710330758 A CN201710330758 A CN 201710330758A CN 108880691 A CN108880691 A CN 108880691A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
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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
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude 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
- H04B10/60—Receivers
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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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/676—Optical arrangements in the receiver for all-optical demodulation of the input optical signal
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- Computer Networks & Wireless Communication (AREA)
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Abstract
Embodiment of the disclosure is related to method, equipment and computer-readable medium for demodulated signal.For example, the demodulation of signal may be implemented in the method for embodiment of the disclosure.In demodulating process, by demodulating least significant bit signal in association with demodulation most significant bit signal obtained.
Description
Technical field
Embodiment of the disclosure relates generally to the communication technology, more particularly, to the side of demodulated signal in fiber optic communication
Method, equipment and computer-readable medium.
Background technique
In recent years, 4 level pulse amplitudes modulation (PAM-4) signal format has become next-generation passive fiber optic network (NG-
) and the hot research topic in short distance fibre-optic transmission system (FOTS) PON.Compared with non-return-to-zero (NRZ) format, PAM-4 technology can be with
Channel spectrum efficiency is improved, this further improves transmission capacities.In addition, due to spectral efficient, the dispersion of PAM-4 signal
Tolerate that performance is better than NRZ signal and duobinary signal.At the same time, by using emphasize system (IM) and directly detect (DD),
The transmitter and/or receiver of PAM-4 has simple structure.However, there are still some problems to be solved in PAM-4.
Summary of the invention
Generally, embodiment of the disclosure is related to the communication means and the corresponding network equipment and terminal of device-to-device
Equipment.
In a first aspect, embodiment of the disclosure provides a kind of method of demodulated signal.This method includes：It will be based on first
The modulated signal that signal and second signal generate is divided into first part and second part；Demodulation first part is to generate third letter
Number, third signal includes the information of the first signal；With third signal demodulate in association second part generate fourth signal, the 4th
Signal includes the information of second signal.
In second aspect, embodiment of the disclosure provides a kind of communication equipment.At least one processor of communication equipment；With
And the memory coupled at least one processor, instruction is stored in memory, and the instruction is by least one described processing
When device executes, so that the communication equipment executes movement, movement includes：The modulation that will be generated based on the first signal and the second signal
Signal is divided into first part and second part；First part is demodulated to generate third signal, third signal includes the first signal
Information；Second part is demodulated in association with third signal and generates fourth signal, and fourth signal includes the information of second signal.
In the third aspect, embodiment of the disclosure provides a kind of computer-readable medium.On the computer-readable medium
It is stored with instruction, when instruction is executed by the processor of machine, so that machine is realized：It will be raw based on the first signal and the second signal
At modulated signal be divided into first part and second part；To generate third signal, third signal includes for demodulation first part
The information of one signal；Second part is demodulated in association with third signal and generates fourth signal, and fourth signal includes second signal
Information.
It should be appreciated that content described in Summary is not intended to limit the key or again of the embodiment of the present disclosure
Feature is wanted, it is also non-for limiting the scope of the present disclosure.The other feature of the disclosure will be easy to understand by description below.
Detailed description of the invention
It refers to the following detailed description in conjunction with the accompanying drawings, the above and other feature, advantage and aspect of each embodiment of the disclosure
It will be apparent, wherein：
Fig. 1 shows the example communication system that embodiment of the disclosure can be implemented within；
Fig. 2 shows in the prior art for demodulating an example of PAM-4 signal；
Fig. 3 shows the schematic diagram of certain signal processings according to an embodiment of the present disclosure；
Fig. 4 shows the flow chart of the demodulation method of some embodiments according to the disclosure；
Fig. 5 shows the block diagram of the equipment of some embodiments according to the disclosure；
Fig. 6 shows the block diagram of the device of some embodiments according to the disclosure；
Fig. 7 shows the analogous diagram of some embodiments according to the disclosure；And
Fig. 8 shows the result figure of some embodiments according to the disclosure.
In all the appended drawings, same or similar reference number indicates same or similar element.
Specific embodiment
Embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the certain of the disclosure in attached drawing
Embodiment, it should be understood that, the disclosure can be realized by various forms, and should not be construed as being limited to this
In the embodiment that illustrates, providing these embodiments on the contrary is in order to more thorough and be fully understood by the disclosure.It should be understood that
It is that being given for example only property of the accompanying drawings and embodiments effect of the disclosure is not intended to limit the protection scope of the disclosure.
Term " communication equipment " as used herein refers to other realities in base station or communication network with specific function
Body or node." base station " (BS) can indicate node B (NodeB or NB), evolution node B (eNodeB or eNB), long-range nothing
Line electric unit (RRU), radio-frequency maser (RH), remote radio heads (RRH), repeater or such as femto base station, femto base
The low power nodes etc. stood etc..In the context of the disclosure, to discuss convenient purpose, term " communication equipment " and " base
Stand " it may be used interchangeably, and may be mainly using eNB as the example of the network equipment.
Term " terminal device " as used herein or " user equipment " (UE) be refer between base station or each other it
Between any terminal device for carrying out wireless communication.As an example, terminal device may include mobile terminal (MT), subscriber stations
(SS), portable subscriber platform (PSS), mobile station (MS) or access terminal (AT) and vehicle-mounted above equipment.In the disclosure
Context in, to discuss convenient purpose, term " terminal device " and " user equipment " be may be used interchangeably.
Term " includes " as used herein and its deformation are that opening includes, i.e., " including but not limited to ".Term "based"
It is " being based at least partially on ".Term " some embodiments " expression " at least some of embodiment "；Term " another embodiment " indicates
" at least one other embodiment ".The related definition of other terms provides in will be described below.
As previously mentioned, PAM-4 technology has become the heat subject of fiber optic communication field.In order to be applied in NG-PON
PAM-4 signal and it is further reduced cost, there are still some urgent problems to be solved.For example, the solution of existing PAM-4 signal
Tune scheme can be divided into two classes.One kind is to demodulate PAM-4 signal using three threshold decision circuits.Scheme in this way,
PAM-4 signal can directly be transformed to different ranks.However, if PAM-4 signal has very high baud rate,
Realize the circuit analog circuit will extremely difficult and cost it is very high.Another program is based on analog-digital converter (ADC).
By using ADC, the PAM-4 signal received can be sampled and using Digital Signal Processing on line or under line,
PAM-4 signal can be switched to different ranks.But the cost of high performance ADC is excessively high.For these reasons, it needs
Demodulation scheme with cost-benefit high performance PAM-4, and it can be applied on a large scale in NG-PON and short distance
In optical fiber transmission.
In order at least be partially solved these and other potential problems, embodiment of the disclosure provides a kind of demodulation side
Method.In accordance with an embodiment of the present disclosure, the simplified demodulation method with cost-benefit PAM-4 may be implemented.PAM-4 demodulation
It can be determined with based single threshold value.
Compared with prior art, embodiment of the disclosure has at least the following advantages：By the way that a decision threshold is used only,
PAM-4 signal can be demodulated.Without using complicated multi-level threshold slicer, common digital binary
CDR and inactive component element can be used to demodulate PAM-4 signal, and which reduce costs.With use ADC line under solve phase modulation
Than the demodulation of PAM-4 signal is on embodiment of the disclosure Support Line to guarantee real time service.Embodiment of the disclosure has bit
The PAM-4 signal of modulation can be demodulated into most significant bit signal MSB and least significant bit signal LSB letter by pilotaxitic texture
Number to distinguish user group.In addition, embodiment of the disclosure is compatible with common difference output photodetector PD, it is further reduced
Cost.
Fig. 1 shows the example communication network 100 that embodiment of the disclosure can be implemented within.Communication network 100 can
To include sending device 102, optical fiber 104 and receiving device 106.It should be understood that although not shown in the drawings, in communication system 100 also
It may include the other equipment of passive devices such as repeater, optical fiber connector, coupler etc..It should be understood that transmitting shown in FIG. 1
The number of device, receiver and optical fiber has no intention to limit merely for the sake of illustration purpose.Network 100 may include any suitable
When the sending device of number, receiving device and optical fiber.
Communication in network 100 can be implemented according to any communication protocol appropriate, including but not limited to, the first generation
The cellular communication protocols such as (1G), the second generation (2G), the third generation (3G), forth generation (4G) and the 5th generation (5G), such as electrically with electricity
The wireless LAN communication agreement of sub- Association of Engineers (IEEE) 802.11 etc., and/or times for being currently known or developing in the future
What his agreement.Moreover, the communication is using any appropriate wireless communication technique and fiber optic communication, including but not limited to, code point is more
How defeated location (CDMA), frequency division multiple access (FDMA), time division multiple acess (TDMA), frequency division duplex (FDD), time division duplex (TDD), multi input be
(MIMO), orthogonal frequency division multiple access (OFDM), and/or any other technology for being currently known or developing in the future out.
Fig. 2 shows the examples 200 that the prior art is used to demodulate PAM-4 signal.As shown, receiver 106 connects
Receive PAM-4 signal 202.It is two groups (the first user group and second user group) that signal 202, which is divided 230,.First user group
Signal 204 generates 250 most significant bits (MSB) signal 208 via clock and data recovery.The signal 206 of second user group is raw
At 270 least significant bits (LSB) signal 210.It needs during signal 206 generates signal 210 via two voltage thresholds
Judgement then carry out phase add operation.However, in existing technology, there are two the structures of the limiter of voltage threshold than single for tool
Structure is complicated for the limiter of one threshold value, and higher cost.In addition, the phase add operation during generating signal 210 needs high speed to patrol
Volume and circuit, which increase the costs of system.A kind of simple therefore, it is necessary to structure and lower-cost demodulation PAM-4 signal
Method.
Fig. 3 shows the schematic diagram of the signal processing 300 according to some embodiments of the disclosure.At signal shown in Fig. 3
Reason can be realized at receiving device 106.It should be understood that the schematic diagram of processing 300 shown in Fig. 3 is exemplary only rather than limit
Property processed.As shown in figure 3, signal 302 is modulated signal.For example, signal 302 can be the modulated signal of PAM-4 format.Although
It is not shown, signal 302 is formed based on two signal (referred to as " the first signal " and second signal) modulation.Although being not shown,
In certain embodiments, signal 302 can be detected by photodetector (PD) (not shown).Only as an example, first signal
Amplitude can be " 2, -2, -2,2, -2,2,2, -2 ", and the amplitude of second signal can be " -1,1, -1,1, -1, -1,1, -1 ", letter
Numbers 302 amplitude can be " 1, -1, -3,3, -3,1,3, -3 ".
Modulated signal 302 is divided into 330 first parts 304 and second part 306.In certain embodiments, first part
304 and second part 306 have predetermined power ratio.For example, predetermined power ratio can be in certain embodiments
It is 1.That is, first part and second part power having the same.
First part 304 is demodulated 340 to generate third signal 308.Third signal 308 includes the information of the first signal.
For example, third signal 308 can have signal sequence identical with the first signal, but it is different amplitude.In the mistake of demodulation 340
Cheng Zhong can demodulate first part 304 using only a threshold value (for example, zero threshold value).
In certain embodiments, it is based on predetermined threshold value, clock and data recovery first part 304 is to generate third letter
Numbers 308.For example, clock and data recovery (CDR) can be used for clock and data recovery first part 304 to generate third signal 308.
In certain embodiments, in demodulating process, the amplitude of first part 304 can be amplified.
In certain embodiments, third signal 308 is divided into 350 Part III 310 and Part IV 312, Part III
310 and the power having the same of Part IV 312.Only as an example, when the first signal amplitude can be " 2, -2, -2,2, -
2, when 2,2, -2 ", the amplitude of Part III 310 and Part IV 312 can be " 2, -2, -2,2, -2,2,2, -2 ".Certain
In embodiment, light separator can be used to divide third signal 308 for Part III 310 and Part IV 312.
Second part 306 and third signal 308 are demodulated in association to generate fourth signal 316.Fourth signal 316 is wrapped
Include the information of second signal.In certain embodiments, second part 306 is amplified 360.In certain embodiments, enlarged
Any one in second part 314 and Part III 310 and Part IV 312 carries out difference processing 370 to generate the 4th letter
Numbers 316.In certain embodiments, enlarged second part 314 has in advance really with Part III 310 and Part IV 312
Fixed power ratio.For example, power ratio can be 1.5.It should be understood that above-mentioned power ratio is exemplary only.Those skilled in the art
It can be set and adjust to obtain required power ratio.Only as an example, shown in Fig. 3 enlarged second part 314 with
Part IV 312 carries out difference processing 370.
Only as an example, the amplitude of enlarged second part 314 can be " 1, -1, -3,3, -3,1,3, -3 ", the 4th
The amplitude of part 312 can be " 2, -2, -2,2, -2,2,2, -2 ", the amplitude through difference processing fourth signal 316 generated
It can be " -1,1, -1,1, -1, -1,1, -1 ".
In certain embodiments.Passive balun (Balun) converter (not shown) can be used to generate fourth signal
316.Balun converter is used as subtracter.Specifically, enlarged second part 314 is sent to the just defeated of balun converter
Inbound port, the 4th 312 is sent to the negative input port of balun converter.The 4th letter of output port output of balun converter
Numbers 316.It should be understood that difference processing can also be carried out using other elements.It is, for example, possible to use common difference output PD to come
Carry out difference operation.In this case, the amplification factor of first part 304 and second part 306 can be adjusted with
In subsequent difference operation.
Fig. 4 is the flow chart according to the method 400 of some embodiments of the disclosure.Method 400 shown in Fig. 4 can schemed
It is realized at receiver 106 in 1.
402, the modulated signal 302 generated based on the first signal and the second signal is divided into first part 304 and second
Part 306.In certain embodiments, first part 304 and second part 306 have predetermined power ratio.For example, at certain
Predetermined power ratio can be 1 in a little embodiments.That is, first part and second part power having the same.
404, first part 304 is demodulated to generate third signal 308.Third signal 308 includes the letter of the first signal
Breath.For example, third signal 308 can have signal sequence identical with the first signal, but it is different amplitude.In demodulation 340
During, first part 304 can be demodulated using only a threshold value (for example, zero threshold value).
In certain embodiments, it is based on predetermined threshold value, clock and data recovery first part 304 is to generate third letter
Numbers 308.For example, clock and data recovery (CDR) can be used for clock and data recovery first part 304 to generate third signal 308.
In certain embodiments, in demodulating process, the amplitude of first part 304 can be amplified.In certain embodiments, third is believed
Numbers 308 are divided into 350 Part III 310 and Part IV 312, Part III 310 and the function having the same of Part IV 312
Rate.In certain embodiments, light separator can be used to divide third signal 308 for Part III 310 and Part IV
312。
406, second part 306 generates fourth signal 316 by demodulating in association with third signal 308.4th letter
Number include second signal information.In certain embodiments, second part 306 is amplified, enlarged second part 314 and
Any one in three parts 310 and Part IV 312 carries out difference processing to generate fourth signal 316.In some embodiments
In, enlarged second part 314 has predetermined power ratio with Part III 310 and Part IV 312.For example, function
Rate ratio can be 1.5.It should be understood that above-mentioned power ratio is exemplary only.Those skilled in the art can be set and adjust with
Obtain required power ratio.Only as an example,
Fig. 5 can be achieved on the block diagram of equipment 500 according to an embodiment of the present disclosure.As shown in figure 5, equipment 500 includes
One or more processors 510 are coupled to one or more memories 520 of processor 510, are coupled to processor 510
One or more transmitters and/or receiver 540
Processor 510 can be any suitable type suitable for local technical environment, as non-limiting example, place
Reason device 510 can include but is not limited to one or more general purpose computers, special purpose computer, microprocessor, Digital Signal Processing
Device and processor based on multi-core processor framework.Equipment 500 can have multiple processors, such as specific integrated circuit core
Piece, it is synchronous with primary processor in time.
Memory 520 can be any suitable type suitable for local technical environment, and can use any conjunction
Suitable data storage technology realizes, including but not limited to non-transitory computer-readable medium, the memory based on semiconductor
Part, magnetic memory device and system, light storage device and system.
Memory 520 stores at least part of instruction 430.Emitter/receiver 540 can be adapted for two-way communication.Hair
Emitter/receiver 540 has at least one antenna to communicate, and emitter/receiver 540 can support fiber optic communication, but
In practice, the access node that the disclosure refers to may have several.Communication interface can indicate any and be used for and other network elements
The necessary interface of communication.
Instruction 530 is assumed to include program instruction, when being executed by associated processor 510, makes 500 basis of equipment
It is operated in the disclosure referring to Fig. 3 and Fig. 4 described embodiment.That is, embodiment of the disclosure can be by computer software
It executes and is realized by the processor 510 of equipment 500, or by hardware, or by the combination of software and hardware.
Fig. 6 shows the block diagram of the device 600 according to some embodiments of the disclosure.It is appreciated that device 600 can be real
At present receiving device 106 shown in FIG. 1.As shown in fig. 6, device 600 may include：First separative unit 610, is configured as
First part and second part will be divided into based on the modulated signal that the first signal and the second signal generate；First demodulating unit 630,
Demodulation first part is configured as to generate third signal, third signal includes the information of the first signal；Second demodulating unit, quilt
It is configured to demodulate second part generation fourth signal in association with third signal, fourth signal includes the information of second signal.
In certain embodiments, the first separative unit 610 is additionally configured to：Modulated signal is divided into first part and second
Part makes first part and second part have predetermined power ratio.
In certain embodiments, the first demodulating unit 630 is additionally configured to：Based on predetermined threshold value, clock data
Restore first part to generate third signal.In certain embodiments, the first demodulating unit 630 is additionally configured to based on true in advance
The first fixed amplifying parameters amplify the first part through clock and data recovery to generate third signal.
In certain embodiments, device 600 further includes the second separative unit 670, is configured as third signal being divided into
Three parts and Part IV, so that Part III and Part IV power having the same.In certain embodiments, the second demodulation
Unit 650 be additionally configured to amplification second part and by enlarged second part and one of Part III and Part IV into
Row difference processing, to generate fourth signal.In certain embodiments, the second demodulating unit 650 is additionally configured to amplification second
Divide so that enlarged second part and Part III and Part IV have predetermined power ratio.
It should be appreciated that processing 300 and method that each unit recorded in device 600 is described with reference Fig. 3 to Fig. 4 respectively
Each movement in 400 is corresponding.Therefore, device 600 is equally applicable to above in association with Fig. 3 to Fig. 4 operation described and feature
And unit wherein included, and have same effect, detail repeats no more.
Included unit can use various modes to realize in device 600, including software, hardware, firmware or its
Meaning combination.In certain embodiments, software and/or firmware can be used to realize in one or more units, such as is stored in
Machine-executable instruction on storage media.Other than machine-executable instruction or alternatively, part in device 600 or
Person's whole unit can be realized at least partly by one or more hardware logic components.It as an example, not a limit, can be with
The hardware logic component of the exemplary type used include field programmable gate array (FPGA), specific integrated circuit (ASIC), specially
With standard items (ASSP), system on chip (SOC), Complex Programmable Logic Devices (CPLD), etc..
These units shown in Fig. 6 can partially or entirely be embodied as hardware module, software module, firmware module
Or any combination thereof.Particularly, in certain embodiments, above-described process, method or process can be by the network equipments
In hardware realize.For example, the network equipment can use its transmitter, receiver, transceiver and/or processor or controller
To realize processing 300 shown in Fig. 3 and method shown in Fig. 4 400.,
Fig. 7 shows the analogous diagram of demodulation PAM-4 signal and Fig. 8 shows the knot of some embodiments according to the disclosure
Fruit figure.Can be seen that embodiment of the disclosure from Fig. 7 and result shown in Fig. 8 can effectively demodulate PAM-4 signal.
In general, the various example embodiments of the disclosure can hardware or special circuit, software, logic or its
What implement in combination.Some aspects can be implemented within hardware, and other aspects can by controller, microprocessor or
Other are calculated implements in the firmware or software that equipment executes.When the various aspects of embodiment of the disclosure are illustrated or described as frame
When figure, flow chart or other certain graphical representations of use, it will be understood that box described herein, device, system, techniques or methods can
Using as unrestricted example in hardware, software, firmware, special circuit or logic, common hardware or controller or other in terms of
It calculates and implements in equipment or its certain combination.
As an example, embodiment of the disclosure can be described in the context of machine-executable instruction, machine can be held
Row instruction such as includes in the program module executed in the device on the true or virtual processor of target.In general,
Program module includes routine, program, library, object, class, component, data structure etc., executes specific task or realizes specific
Abstract data structure.In embodiments, the function of program module can merge between described program module or
Segmentation.Machine-executable instruction for program module can execute in local or distributed apparatus.In distributed apparatus
In, program module can be located locally in remote medium storage the two.
The computer program code of method used to implement the present disclosure can be write with one or more programming languages.These
Computer program code can be supplied to the processing of general purpose computer, special purpose computer or other programmable data processing units
Device so that program code when being executed by computer or other programmable data processing units, cause flow chart and/
Or function/operation specified in block diagram is carried out.Program code can completely on computers, part on computers, conduct
Independent software package, part are on computers and part is held on a remote computer or server on the remote computer or completely
Row.
In the context of the disclosure, machine readable media can be include or storage be used for or about instruction execution system
Any tangible medium of the program of system, device or equipment.Machine readable media can be machine-readable signal medium or machine can
Read storage medium.Machine readable media can include but is not limited to electronics, magnetic, it is optical, electromagnetism, infrared or partly lead
Body system, device or equipment equipment or its any appropriate combination.The more detailed example of machine readable storage medium includes having one
Or the electrical connection of multiple conducting wires, portable computer diskette, hard disk, random access memories (RAM), read-only memory
(ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), light storage device, magnetic storage apparatus or its is any appropriate
Combination.
In addition, although operation is depicted with particular order, this simultaneously should not be construed and require this generic operation to show
Particular order is completed with sequential order, or executes the operation of all diagrams to obtain expected result.In some cases, more
Task or parallel processing can be beneficial.Similarly, although discussed above contain certain specific implementation details, this is not
It should be interpreted that any invention of limitation or the scope of the claims, and should be interpreted that the specific embodiment that can be directed to specific invention
Description.Certain features described in the context of separated embodiment can also be with combined implementation single real in this specification
It applies in example.Conversely, the various features described in the context of single embodiment can also discretely multiple embodiments or
Implement in any appropriate sub-portfolio.
Although with specific to the language description of structural features and or methods of action theme, but it is to be understood that institute
The theme limited in attached claim is not limited to above-described special characteristic or movement.On the contrary, above-described specific spy
Movement of seeking peace is disclosed as the exemplary forms for realizing claim.
Claims (21)
1. a kind of method for demodulated signal, including：
First part and second part will be divided into based on the modulated signal that the first signal and the second signal generate；
The first part is demodulated to generate third signal, the third signal includes the information of first signal；
The second part is demodulated in association with the third signal and generates fourth signal, and the fourth signal includes described the
The information of binary signal.
2. according to the method described in claim 1, wherein the format of the modulated signal is four level pulse amplitude modulation formats.
3. according to the method described in claim 1, modulated signal is wherein divided into first part and second part includes：
The modulated signal is divided into the first part and the second part, so that the first part and second described
Dividing has predetermined power ratio.
4. according to the method described in claim 1, demodulating the first part wherein to generate third signal and including：
Based on predetermined threshold value, first part described in clock and data recovery is to generate third signal.
5. according to the method described in claim 4, demodulating the first part wherein to generate third signal and including：
Based on predetermined first amplifying parameters, amplify the first part through clock and data recovery to generate the third
Signal.
6. according to the method described in claim 1, wherein generation fourth signal includes：
The third signal is divided into Part III and Part IV, so that the Part III has phase with the Part IV
Same power；
Amplify the second part；And
The enlarged second part and one of the Part III and the Part IV are subjected to difference processing, generate the
Four signals.
7. according to the method described in claim 6, wherein amplifying the second part and including：
Amplifying the second part has the enlarged second part and the third portion and the Part IV in advance
First determining power ratio.
8. a kind of communication equipment, including：
At least one processor；And
The memory coupled at least one described processor is stored with instruction in the memory, and described instruction is described
When at least one processor executes, so that the communication equipment executes movement, the movement includes：
First part and second part will be divided into based on the modulated signal that the first signal and the second signal generate；
The first part is demodulated to generate third signal, the third signal includes the information of first signal；
The second part is demodulated in association with the third signal generates fourth signal,
The fourth signal includes the information of the second signal.
9. communication equipment according to claim 8, wherein the format of the modulated signal is the modulation of four level pulse amplitudes
Format.
10. communication equipment according to claim 8, the movement further include：
The modulated signal is divided into the first part and the second part, so that the first part and second described
Dividing has predetermined power ratio.
11. communication equipment according to claim 8, the movement further include：
Based on predetermined threshold value, first part described in clock and data recovery is to generate third signal.
12. communication equipment according to claim 11, the movement further include：
Based on predetermined first amplifying parameters, amplify the first part through clock and data recovery to generate the third
Signal.
13. communication equipment according to claim 8, the movement further include：
The third signal is divided into Part III and Part IV, so that the Part III has phase with the Part IV
Same power；
Amplify the second part；And
The enlarged second part and one of the Part III and the Part IV are subjected to difference processing, generate the
Four signals.
14. communication equipment according to claim 13, the movement further include：
Amplifying the second part has the enlarged second part and the third portion and the Part IV in advance
First determining power ratio.
15. a kind of computer-readable medium, it is stored with instruction on the computer-readable medium, when described instruction is by machine
When at least one processing unit executes, so that the machine is configured as executing a kind of method, the method includes：
First part and second part will be divided into based on the modulated signal that the first signal and the second signal generate；
The first part is demodulated to generate third signal, the third signal includes the information of first signal；
The second part is demodulated in association with the third signal and generates fourth signal, and the fourth signal includes described the
The information of binary signal.
16. medium according to claim 15, wherein the format of the modulated signal is four level pulse amplitudes modulation lattice
Formula.
17. medium according to claim 15, wherein the method also includes：
The modulated signal is divided into the first part and the second part, so that the first part and second described
Dividing has predetermined power ratio.
18. medium according to claim 15, wherein the method also includes：
Based on predetermined threshold value, first part described in clock and data recovery is to generate third signal.
19. medium according to claim 18, wherein the method includes：
Based on predetermined first amplifying parameters, amplify the first part through clock and data recovery to generate the third
Signal.
20. medium according to claim 15, wherein the method also includes：
The third signal is divided into Part III and Part IV, so that the Part III has phase with the Part IV
Same power；
Amplify the second part；And
It will the enlarged second part and one of in the Part III and Part IV progress difference processing, life
At fourth signal.
21. medium according to claim 20, wherein the method also includes：
Amplifying the second part has the enlarged second part and the third portion and the Part IV in advance
First determining power ratio.
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| CN201710330758.5A CN108880691B (en) | 2017-05-11 | 2017-05-11 | Method, apparatus and computer readable medium for demodulating a signal |
| PCT/EP2018/062276 WO2018206807A1 (en) | 2017-05-11 | 2018-05-11 | Method, device and computer-readlabe medium for demodulating signals |
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| CN112398543A (en) * | 2019-08-19 | 2021-02-23 | 上海诺基亚贝尔股份有限公司 | Method, apparatus, system, device and computer readable medium for optical communication |
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| WO2018206807A1 (en) | 2018-11-15 |
| CN108880691B (en) | 2020-07-31 |
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