CN106160865B - Modulation, demodulation method and the device of signal - Google Patents
Modulation, demodulation method and the device of signal Download PDFInfo
- Publication number
- CN106160865B CN106160865B CN201610438678.7A CN201610438678A CN106160865B CN 106160865 B CN106160865 B CN 106160865B CN 201610438678 A CN201610438678 A CN 201610438678A CN 106160865 B CN106160865 B CN 106160865B
- Authority
- CN
- China
- Prior art keywords
- signal
- current time
- tunnel
- obtains
- precoded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The embodiment of the invention provides a kind of modulation of signal, demodulation method and device, the modulator approach of signal includes：Precoding is carried out to the first via received, the second tunnel input signal respectively, obtains the first via, the second road precoded signal；Level translation is carried out to the first via, the second road precoded signal respectively, obtains the first via, the second tunnel level translation signal；The first via, the second tunnel level translation signal are encoded respectively, obtain the first via, the second tunnel encoded signal；It is overlapped after decaying to the second tunnel encoded signal with first via encoded signal, obtains the first signal；It takes absolute value to the level value of the first signal, obtains second signal；Pulse position modulation is carried out to second signal, obtains pulse position modulation signal.The embodiment of the present invention improves signal transmission rate, increases the correlation of signal, reduces the bit error rate of signal transmission, improves the dispersion of signal.
Description
Technical field
The present invention relates to metropolitan area optical network fields, more particularly to a kind of modulation of signal, demodulation method and device.
Background technique
With the development of network, rate that signal is transmitted in the fields such as transmission of video, social media, cloud computing, the bit error rate
Requirement it is higher and higher.A kind of modulation methods of NRZ (Non-Return to Zero, non-return to zero code) are generallyd use in the prior art
Method, this method is simple and easy, is easy to implement the synchronization of signal, but since the modulator approach disposably can only one bit of calculation processing
Signal, therefore signal transmission rate is lower, and occupied bandwidth is big, can no longer meet the demand of next-generation 400G Ethernet.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of modulation of signal, demodulation method and device, signal transmission can be improved
Rate.
In order to achieve the above objectives, the embodiment of the invention provides a kind of modulator approach of signal, the method includes：
Second tunnel input signal of first via input signal and current time to the current time received carries out respectively
Precoding obtains the first via precoded signal at current time and the second road precoded signal at current time；
Second road precoded signal of first via precoded signal and current time to the current time carries out respectively
Level translation obtains the first via level translation signal at current time and the second tunnel level translation signal at current time；
Second tunnel level translation signal of first via level translation signal and current time to the current time is distinguished
It is encoded, obtains the first via encoded signal at current time and the second tunnel encoded signal at current time；
It encodes and believes with the first via at the current time after decaying to the second tunnel encoded signal at the current time
It number is overlapped, obtains first signal at current time；
It takes absolute value to the level value of first signal at the current time, obtains the second signal at current time；
Pulse position modulation is carried out to the second signal at the current time, obtains the pulse position modulation letter at current time
Number.
More preferably, the first via input signal and second tunnel at current time input letter at the described pair of current time received
Number precoding is carried out respectively, obtain the first via precoded signal at current time and the second road precoded signal at current time,
Including：
After the first via input signal at current time is carried out inverse, with the first via precoded signal of last moment into
The superposition of row exclusive or, obtains the first via precoded signal at current time；
After the second tunnel input signal at current time is carried out inverse, with the second road precoded signal of last moment into
The superposition of row exclusive or, obtains the second road precoded signal at current time.
More preferably, the first via level translation signal and the second road level at current time to the current time becomes
It changes signal to be encoded respectively, obtains the first via encoded signal at current time and the second tunnel encoded signal at current time, wrap
It includes：
The first via level translation signal of first via level translation signal and last moment to current time is overlapped,
Obtain the first via encoded signal at current time；
Second tunnel level translation signal of the second tunnel level translation signal and last moment to current time is overlapped,
Obtain the second tunnel encoded signal at current time.
The embodiment of the invention also provides a kind of demodulation method of signal, the method includes：
To the pulse position modulation signal at current time, pulse position demodulation is carried out, the pulse position at current time is obtained
Demodulated signal；
Threshold value judgement is carried out to the pulse position demodulated signal at the current time, and according to judging result, acquisition is worked as
The first via input signal at preceding moment and the second tunnel input signal at current time.
More preferably, the pulse position demodulated signal to the current time carries out threshold value judgement, and according to judgement
As a result, the first via input signal and the second tunnel input signal at current time at current time are obtained, including：
Threshold value division is carried out to the pulse position demodulated signal at the current time, obtains first output at current time
The third output signal of signal, second output signal at current time and current time；The first output letter at the current time
Number, second output signal at current time and the third output signal at current time respectively correspond the first ascending thresholding
Value, the second threshold value and third threshold value；
Second output signal at the current time is determined as to the first via input signal at the current time；It is described to work as
Second output signal at first output signal at preceding moment and the current time carries out that exclusive or is superimposed to obtain current time
The third output signal at the current time and the 4th output signal at the current time are carried out or are transported by four output signals
It calculates, obtains the second tunnel input signal at the current time.
The embodiment of the invention also provides a kind of modulating device of signal, described device includes：
Precoded signal obtains module, for the current time received first via input signal and current time
Second tunnel input signal carries out precoding respectively, obtains the first via precoded signal at current time and second tunnel at current time
Precoded signal；
Level translation signal acquisition module, for the current time first via precoded signal and current time
Second road precoded signal carries out level translation respectively, obtains first via level translation signal and the current time at current time
Second tunnel level translation signal；
Encoded signal obtains module, for first via level translation signal and current time to the current time
Two tunnel level translation signals are encoded respectively, and the first via encoded signal and second tunnel at current time for obtaining current time are compiled
Code signal；
First signal acquisition module is worked as after decaying for the second tunnel encoded signal to the current time with described
The first via encoded signal at preceding moment is overlapped, and obtains first signal at current time；
Second signal obtains module, and the level value for the first signal to the current time takes absolute value, worked as
The second signal at preceding moment；
Pulse position modulation signal obtains module, carries out pulse position tune for the second signal to the current time
System, obtains the pulse position modulation signal at current time.
More preferably, the precoded signal acquisition module includes：
First via precoded signal acquiring unit, after the first via input signal at current time is carried out inverse,
Exclusive or is carried out with the first via precoded signal of last moment to be superimposed, and obtains the first via precoded signal at current time；
Second road precoded signal acquiring unit, after the second tunnel input signal at current time is carried out inverse,
Exclusive or is carried out with the second road precoded signal of last moment to be superimposed, and obtains the second road precoded signal at current time.
More preferably, the encoded signal acquisition module includes：
First via encoded signal acquiring unit, for current time first via level translation signal and last moment
First via level translation signal is overlapped, and obtains the first via encoded signal at current time；
Second tunnel encoded signal acquiring unit, for current time the second tunnel level translation signal and last moment
Second tunnel level translation signal is overlapped, and obtains the second tunnel encoded signal at current time.
The embodiment of the invention also provides a kind of demodulating equipment of signal, described device includes：
Pulse position demodulated signal obtains module, for the pulse position modulation signal to current time, carries out pulse position
Demodulation is set, the pulse position demodulated signal at current time is obtained；
Input signal obtains module, carries out threshold value judgement for the pulse position demodulated signal to the current time,
And according to judging result, the first via input signal at current time and the second tunnel input signal at current time are obtained.
More preferably, the input signal acquisition module includes：
Threshold value division unit carries out threshold value division for the pulse position demodulated signal to the current time, obtains
The first output signal, the third output signal of second output signal at current time and current time to current time；It is described
The third output signal of first output signal at current time, second output signal at current time and current time respectively corresponds
Ascending the first threshold value, the second threshold value and third threshold value；
Input signal acquiring unit, for second output signal at the current time to be determined as the current time
First via input signal；First output signal and second output signal at the current time at the current time carry out exclusive or
Superposition obtains the 4th output signal at current time, by the of the third output signal at the current time and the current time
Four output signals carry out or operation, obtain the second tunnel input signal at the current time.
Modulation, demodulation method and the device of signal provided in an embodiment of the present invention, improve signal transmission rate, increase
The correlation of signal, enhances the dispersion of signal, effectively avoids between signal due to distorted signals caused by interfering
The problem of, improve the distance that signal transmits in single mode optical fiber；Meanwhile the bit error rate of signal transmission is effectively reduced, and mention
High power utilization and band efficiency.
Certainly, implement any of the products of the present invention or method it is not absolutely required at the same reach all the above excellent
Point.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of the modulator approach of signal provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of the modulator approach of signal provided in an embodiment of the present invention；
Fig. 3 is the exemplary embodiment of the modulator approach of signal provided in an embodiment of the present invention；
Fig. 4 is the flow chart of the demodulation method of signal provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of the demodulation method of signal provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of communication system provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the modulating device of signal provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the demodulating equipment of signal provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
As shown in Figure 1, the flow chart of the modulator approach for signal provided in an embodiment of the present invention, this method can be applicable to letter
Number modulating device on, principle is：Using two lines road, the signal of two bits can be received simultaneously, and to the two bits
It is modulated processing, to achieve the purpose that improve signal transmission rate.This method includes：
S110, the second tunnel input signal difference of first via input signal and current time to the current time received
Precoding is carried out, the first via precoded signal at current time and the second road precoded signal at current time are obtained.
Specifically, transmitting terminal carries out channel coding processing to the waveform signal, obtains binary system before issuing waveform signal
Signal, i.e., the first via input signal at above-mentioned current time and the second tunnel input signal at current time.In the present embodiment,
First via input signal and the second tunnel input signal can be the two neighboring bit signal of the same signal.
Preferably, step S110 may include following refinement step：
A1, the first via precoding letter after the first via input signal at current time is carried out inverse, with last moment
Number carry out exclusive or superposition, obtain the first via precoded signal at current time.
Specifically, the modulating device of signal in the first via input signal and current time that receive current time second
After the input signal of road, precoding is carried out to the two, which is also referred to as first annular iterative process.
As shown in Fig. 2, the schematic diagram of the modulator approach for signal provided in an embodiment of the present invention.Enable the current time first via
Input signal is a (k), and current time the second tunnel input signal is a ' (k).Wherein, k indicates the kth moment.
Firstly, a (k) input is non-behind the door, inverse processing is carried out, is obtainedWith the first of last moment
Road precoded signal b (k-1) carries out exclusive or superposition, obtains the first via precoded signal b (k) at current time.Wherein, k-1 table
Show -1 moment of kth, the i.e. last moment at current time.
The calculation formula of b (k) is
Wherein, b (k-1) can be obtained by b (k) by the delay of time τ.
A2, the second tunnel precoding letter after the second tunnel input signal at current time is carried out inverse, with last moment
Number carry out exclusive or superposition, obtain the second road precoded signal at current time.
Specifically, a ' (k) input is non-behind the door, inverse processing is carried out, is obtainedWith last moment
Second road precoded signal b ' (k-1) carries out exclusive or superposition, obtains the second road precoded signal b ' (k) at current time.
The calculation formula of b ' (k) is
Wherein, b ' (k-1) can be obtained by b ' (k) by the delay of time τ.
The present embodiment uses two lines road, can disposably receive and process the input signal of two bits, be mentioned with reaching
The purpose of high RST transmission rate；Meanwhile the present embodiment is by the way of annular iteration, i.e., according to the input on every route
The precoded signal that signal obtains, it is all related with the precoded signal of last moment, to increase the correlation of signal, enhance
The dispersion of signal improves signal the problem of effectively avoiding between signal due to distorted signals caused by interfering
The distance transmitted in single mode optical fiber.
S120, the second road precoded signal difference of first via precoded signal and current time to the current time
Level translation is carried out, the first via level translation signal at current time and the second tunnel level translation signal at current time are obtained.
Specifically, obtain after level translation the of current time to the first via precoded signal b (k) at current time
Level translation signal c (k) all the way；It is obtained currently after carrying out level translation to the second road precoded signal b ' (k) at current time
The second tunnel level translation signal c ' (k) at moment.
In the present embodiment, level change can be carried out in the following way：
S130, the second tunnel level translation signal of first via level translation signal and current time to the current time
It is encoded respectively, obtains the first via encoded signal at current time and the second tunnel encoded signal at current time.
In the present embodiment, to the second tunnel level translation of the first via level translation signal at current time and current time
Signal is encoded respectively, which also becomes the second annular iterative process.Preferably, step S110 may include following thin
Change step：
B1, the first via level translation signal at current time and the first via level translation signal of last moment are folded
Add, obtains the first via encoded signal at current time.
Specifically, the first via level translation signal of the first via level translation signal c (k) at current time and last moment
C (k-1) is overlapped, and obtains the first via encoded signal d (k) at current time, i.e. d (k)=c (k)+c (k-1).
Wherein, c (k-1) can be obtained by c (k) by the delay of time τ.
B2, the second tunnel level translation signal at current time and the second tunnel level translation signal of last moment are folded
Add, obtains the second tunnel encoded signal at current time.
Specifically, the second tunnel level translation of the second tunnel level translation signal c ' (k) at current time and last moment are believed
Number c ' (k-1) is overlapped, and obtains the second tunnel encoded signal d ' (k) at current time, i.e. d ' (k)=c ' (k)+c ' (k-1).
Wherein, c ' (k-1) can be obtained by c ' (k) by the delay of time τ.
In the present embodiment, due to level value that the value of c (k) He c ' (k) are 1 or -1, d (k) and d ' (k) be 2,0 or -
2。
The present embodiment is by the way of annular iteration, the precoded signal at obtained current time, need simultaneously with work as
The level translation signal at preceding moment and the level change signal of last moment are related, to increase the correlation of signal, enhance
The dispersion of signal improves signal the problem of effectively avoiding between signal due to distorted signals caused by interfering
The distance transmitted in single mode optical fiber.
S140 is compiled after decaying to the second tunnel encoded signal at the current time with the first via at the current time
Code signal is overlapped, and obtains first signal at current time.
Specifically, the second tunnel encoded signal d ' (k) at current time is weak by the electricity of 6dB, decay to original signal
Half after, obtain e ' (k), the level value of e ' (k) can be -1,0 or 1.
E ' (k) and the first via encoded signal d (k) at current time are overlapped, and obtain the first signal f (k), i.e. and f (k)=
E ' (k)+d (k), then the level value of f (k) can be -3, -2, -1,0,1,2 or 3.
S150 takes absolute value to the level value of first signal at the current time, obtains the second signal at current time.
Specifically, full-wave rectification is carried out to the first signal f (k) at current time, i.e., taken absolute value to the level value of f (k),
The second signal g (k) at current time is obtained, then the level value of g (k) can be 0,1,2 or 3.In the present embodiment, believe first
Number the method that takes absolute value of level value can be full-wave rectification.
S160 carries out pulse position modulation to the second signal at the current time, obtains the pulse position at current time
Modulated signal.
In the present embodiment, pulse position modulation (PPM) is that a kind of pulse position changes according to the variation of transferred signal
Modulation system (this is the prior art), possess higher power utilization and band efficiency, transmission it is anti-interference
Ability is also very strong, and coding circuit realizes the bit error rate for simply effectively reducing signal transmission.
As shown in figure 3, the exemplary embodiment of the modulator approach for signal provided in an embodiment of the present invention.Wherein, first
The level value of road input signal a (k) is 0011, and the level value of the second tunnel input signal a ' (k) is 0101, the obtained
One signal f (k) is 0-1 23, and obtained second signal g (k) is 0123, finally passes through pulse position modulation, obtains
Pulse position modulation signal corresponding position as shown in the figure.
Table 1
| k | -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| a(k) | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | |
| b(k) | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 |
| c(k) | -1 | 1 | 1 | -1 | -1 | -1 | 1 | 1 | -1 | 1 |
| d(k) | 0 | 2 | 0 | -2 | -2 | 0 | 2 | 0 | 0 | |
| a′(k) | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | |
| a′(k) | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 |
| c′(k) | -1 | 1 | -1 | -1 | -1 | 1 | 1 | 1 | 1 | -1 |
| d′(k) | 0 | 0 | -2 | -2 | 0 | 2 | 2 | 2 | 0 | |
| e′(k) | 0 | 0 | -1 | -1 | 0 | 1 | 1 | 1 | 0 | |
| f(k) | 0 | 2 | -1 | -3 | -2 | 1 | 3 | 1 | 0 | |
| g(k) | 0 | 2 | 1 | 3 | 2 | 1 | 3 | 1 | 0 |
Shown in table 1 from the 0th moment to the 8th moment, first via input signal a (k) and the second tunnel input signal a ' (k)
When taking varying level value, first via precoded signal b (k), the second road precoded signal b ' (k), first at corresponding each moment
Road level translation signal c (k), the second tunnel level translation signal c ' (k), first via encoded signal d (k), the second tunnel encoded signal
The level value of d ' (k), the half e ' (k) of the second tunnel encoded signal, the first signal f (k) and second signal g (k).
Preferably, the modulating device of signal passes through fiber channel by transmitter after obtaining pulse position modulation signal
Receiving end is sent it to, receiving end demodulates the signal, obtains original first via input signal and the input of the second tunnel
Signal.
The modulator approach of signal provided in an embodiment of the present invention disposably receives and processes two by using two lines road
The mode of the signal of bit, improves signal transmission rate；By the way of bicyclic iteration, the correlation of signal is increased, is increased
The strong dispersion of signal improves letter the problem of effectively avoiding between signal due to distorted signals caused by interfering
Number distance transmitted in single mode optical fiber；Meanwhile using the method for pulse position modulation, the error code of signal transmission is effectively reduced
Rate, and improve power utilization and band efficiency.
Embodiment two
As shown in figure 4, the flow chart of the demodulation method for signal provided in an embodiment of the present invention, this method can be applicable to letter
Number demodulating equipment on, to be demodulated to pulse position modulation signal.This method includes：
S410 carries out pulse position demodulation, obtains the pulse at current time to the pulse position modulation signal at current time
Position demodulated signal.
As shown in figure 5, the schematic diagram of the demodulation method for signal provided in an embodiment of the present invention, the receiver of receiving end exist
After the pulse position modulation signal for receiving current time, pulse position signal is transformed into pulsewidth modulation by the demodulating equipment of signal
Signal later again by integral and adder circuit, then carries out the level signal that demodulation needs after envelope detection reverts to, i.e. arteries and veins
Rush position demodulation (this is the prior art).
S420 carries out threshold value judgement to the pulse position demodulated signal at the current time, and according to judging result, obtains
Take the first via input signal at current time and the second tunnel input signal at current time.
In order to corresponding with bicyclic iteration modulated process, definition step S420 is bicyclic iterative demodulation method, and step S420 can
Including following refinement step：
C1, threshold value division is carried out to the pulse position demodulated signal at the current time, obtains the first of current time
The third output signal of output signal, second output signal at current time and current time；The first of the current time is defeated
The third output signal of signal, second output signal at current time and current time respectively corresponds ascending first out
Limit value, the second threshold value and third threshold value.
As shown in figure 5, the pulse position demodulated signal at current time is carried out threshold value division, preferably three thresholdings
Value, first threshold value are 0.5V, and second threshold value is 1.5V, and third threshold value is 2.5V.
The pulse position demodulated signal at current time is sequentially inputted in the corresponding logic gate of these three threshold values, respectively
Obtain the third output signal of first output signal at current time, second output signal at current time and current time.
For example, if pulse position demodulated signal is 2V, the first output signal obtained according to the first threshold value 0.5V
It is 1；It is 1 according to the second output signal that the second threshold value 1.5V is obtained；The third output obtained according to third threshold value 2.5V
Signal is 0.
C2, the first via input signal that second output signal at the current time is determined as to the current time；Institute
It states first output signal at current time and second output signal at the current time carries out exclusive or and is superimposed to obtain current time
The 4th output signal, the 4th output signal at the third output signal at the current time and the current time is carried out or
Operation obtains the second tunnel input signal at the current time.
As shown in figure 5, using second output signal at current time as the first via input signal a (k) at current time, when
Second output signal at first output signal at preceding moment and current time carries out exclusive or and is superimposed to obtain the 4th defeated of current time
Signal out, the third output signal and the 4th output signal at current time at current time carry out or operation, obtains current time
The second tunnel input signal a ' (k).
Table 2 shows the level value V of pulse position demodulated signalppmWhen in different value ranges, corresponding first obtained
The level value of road input signal a (k) and the second tunnel input signal a ' (k).
Table 2
The demodulation method of signal provided in an embodiment of the present invention is effectively reduced by using the method that pulse position demodulates
The bit error rate of signal transmission, and improve power utilization and band efficiency；Meanwhile using the side of bicyclic iterative demodulation
Method improves signal transmission rate, increases the correlation of signal, enhances the dispersion of signal, effectively avoids letter
The problem of between number due to distorted signals caused by interfering, improve the distance that signal transmits in single mode optical fiber.
As shown in fig. 6, being the schematic diagram of communication system provided in an embodiment of the present invention.Transmitting terminal is issuing waveform signal
Afterwards, channel coding processing is carried out to the waveform signal first, obtains binary signal (i.e. above-mentioned first via input signal and the
Two tunnel input signals), the modulating device of signal carries out bicyclic iteration modulation to first via input signal and the second tunnel input signal
After processing, pulse position modulation is carried out, obtains pulse position modulation signal, optical transmitter launches pulse position modulation signal
It goes；The photoreceiver of receiving end receives pulse position modulation signal, and the demodulating equipment of signal carries out pulse position solution to the signal
It adjusts, obtains pulse position demodulated signal, then carry out bicyclic iterative demodulation, obtain first via input signal and the second tunnel input letter
Number, finally first via input signal and the second tunnel input signal are decoded, obtain Raw waveform signals, realizes information data
Transmission.
Embodiment three
As shown in fig. 7, the structural schematic diagram of the modulating device for signal provided in an embodiment of the present invention, for executing Fig. 1
Shown in method, which includes：
Precoded signal obtain module 710, for the current time received first via input signal and it is current when
The the second tunnel input signal carved carries out precoding respectively, obtain current time first via precoded signal and current time the
Two road precoded signals；
Level translation signal acquisition module 720, for the current time first via precoded signal and it is current when
Carve the second road precoded signal carry out level translation respectively, obtain current time first via level translation signal and it is current when
The the second tunnel level translation signal carved；
Encoded signal obtain module 730, for the current time first via level translation signal and current time
The second tunnel level translation signal encoded respectively, obtain current time first via encoded signal and current time second
Road encoded signal；
First signal acquisition module 740, after decaying for the second tunnel encoded signal to the current time with institute
The first via encoded signal for stating current time is overlapped, and obtains first signal at current time；
Second signal obtains module 750, and the level value for the first signal to the current time takes absolute value, obtains
The second signal at current time；
Pulse position modulation signal obtains module 760, carries out pulse position for the second signal to the current time
Modulation, obtains the pulse position modulation signal at current time.
Preferably, the precoded signal acquisition module 710 includes：First via precoded signal acquiring unit and the second tunnel
Precoded signal acquiring unit (not shown).
First via precoded signal acquiring unit, after the first via input signal at current time is carried out inverse,
Exclusive or is carried out with the first via precoded signal of last moment to be superimposed, and obtains the first via precoded signal at current time；
Second road precoded signal acquiring unit, after the second tunnel input signal at current time is carried out inverse,
Exclusive or is carried out with the second road precoded signal of last moment to be superimposed, and obtains the second road precoded signal at current time.
Preferably, the encoded signal acquisition module includes：First via encoded signal acquiring unit and the second road coding letter
Number acquiring unit (not shown).
First via encoded signal acquiring unit, for current time first via level translation signal and last moment
First via level translation signal is overlapped, and obtains the first via encoded signal at current time；
Second tunnel encoded signal acquiring unit, for current time the second tunnel level translation signal and last moment
Second tunnel level translation signal is overlapped, and obtains the second tunnel encoded signal at current time.
The modulating device of signal provided in an embodiment of the present invention disposably receives and processes two by using two lines road
The mode of the signal of bit, improves signal transmission rate；By the way of bicyclic iteration, the correlation of signal is increased, is increased
The strong dispersion of signal improves letter the problem of effectively avoiding between signal due to distorted signals caused by interfering
Number distance transmitted in single mode optical fiber；Meanwhile using the method for pulse position modulation, the error code of signal transmission is effectively reduced
Rate, and improve power utilization and band efficiency.
Example IV
As shown in figure 8, the structural schematic diagram of the demodulating equipment for signal provided in an embodiment of the present invention, for executing Fig. 4
Shown in method, which includes：
Pulse position demodulated signal obtains module 810, for the pulse position modulation signal to current time, carries out pulse
Position demodulation, obtains the pulse position demodulated signal at current time；
Input signal obtains module 820, carries out threshold value for the pulse position demodulated signal to the current time and sentences
It is disconnected, and according to judging result, obtain the first via input signal at current time and the second tunnel input signal at current time.
Preferably, the input signal acquisition module 820 includes：Threshold value division unit, output signal generation unit and
Input signal acquiring unit (not shown).
Threshold value division unit carries out threshold value division for the pulse position demodulated signal to the current time, obtains
The first output signal, the third output signal of second output signal at current time and current time to current time；It is described
The third output signal of first output signal at current time, second output signal at current time and current time respectively corresponds
Ascending the first threshold value, the second threshold value and third threshold value；
Input signal acquiring unit, for second output signal at the current time to be determined as the current time
First via input signal；First output signal and second output signal at the current time at the current time carry out exclusive or
Superposition obtains the 4th output signal at current time, by the of the third output signal at the current time and the current time
Four output signals carry out or operation, obtain the second tunnel input signal at the current time.
The demodulating equipment of signal provided in an embodiment of the present invention is effectively reduced by using the method that pulse position demodulates
The bit error rate of signal transmission, and improve power utilization and band efficiency；Meanwhile using the side of bicyclic iterative demodulation
Method improves signal transmission rate, increases the correlation of signal, enhances the dispersion of signal, effectively avoids letter
The problem of between number due to distorted signals caused by interfering, improve the distance that signal transmits in single mode optical fiber.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (6)
1. a kind of modulator approach of signal, which is characterized in that the method includes：
Second tunnel input signal of first via input signal and current time to the current time received prelists respectively
Code, obtains the first via precoded signal at current time and the second road precoded signal at current time；
Second road precoded signal of first via precoded signal and current time to the current time carries out level respectively
Transformation, obtains the first via level translation signal at current time and the second tunnel level translation signal at current time；
Second tunnel level translation signal of first via level translation signal and current time to the current time carries out respectively
Coding, obtains the first via encoded signal at current time and the second tunnel encoded signal at current time；
After decaying to the second tunnel encoded signal at the current time with the first via encoded signal at the current time into
Row superposition, obtains first signal at current time；
It takes absolute value to the level value of first signal at the current time, obtains the second signal at current time；
Pulse position modulation is carried out to the second signal at the current time, obtains the pulse position modulation signal at current time.
2. the method according to claim 1, wherein the first via at the described pair of current time received inputs letter
Number and the second tunnel input signal at current time carry out precoding respectively, obtain the first via precoded signal at current time and work as
The second road precoded signal at preceding moment, including：
After the first via input signal at current time is carried out inverse, carried out with the first via precoded signal of last moment different
Or superposition, obtain the first via precoded signal at current time；
After the second tunnel input signal at current time is carried out inverse, carried out with the second road precoded signal of last moment different
Or superposition, obtain the second road precoded signal at current time.
3. the method according to claim 1, wherein the first via level translation to the current time is believed
Number and the second tunnel level translation signal at current time encoded respectively, obtain the first via encoded signal at current time and work as
The second tunnel encoded signal at preceding moment, including：
The first via level translation signal of first via level translation signal and last moment to current time is overlapped, and is obtained
The first via encoded signal at current time；
Second tunnel level translation signal of the second tunnel level translation signal and last moment to current time is overlapped, and is obtained
The second tunnel encoded signal at current time.
4. a kind of modulating device of signal, which is characterized in that described device includes：
Precoded signal acquisition module, second for first via input signal and current time to the current time received
Road input signal carries out precoding respectively, and the second tunnel of the first via precoded signal and current time that obtain current time prelists
Code signal；
Level translation signal acquisition module, second for first via precoded signal and current time to the current time
Road precoded signal carries out level translation respectively, obtain current time first via level translation signal and current time second
Road level translation signal；
Encoded signal obtains module, the second tunnel for first via level translation signal and current time to the current time
Level translation signal is encoded respectively, obtains the first via encoded signal and second tunnel at current time coding letter at current time
Number；
First signal acquisition module, after decaying for the second tunnel encoded signal to the current time with it is described current when
The first via encoded signal at quarter is overlapped, and obtains first signal at current time；
Second signal obtains module, and the level value for the first signal to the current time takes absolute value, when obtaining current
The second signal at quarter；
Pulse position modulation signal obtains module, carries out pulse position modulation for the second signal to the current time, obtains
To the pulse position modulation signal at current time.
5. device according to claim 4, which is characterized in that the precoded signal obtains module and includes：
First via precoded signal acquiring unit, it is and upper after the first via input signal at current time is carried out inverse
The first via precoded signal at one moment carries out exclusive or superposition, obtains the first via precoded signal at current time；
Second road precoded signal acquiring unit, it is and upper after the second tunnel input signal at current time is carried out inverse
The second road precoded signal at one moment carries out exclusive or superposition, obtains the second road precoded signal at current time.
6. device according to claim 4, which is characterized in that the encoded signal obtains module and includes：
First via encoded signal acquiring unit, first for first via level translation signal and last moment to current time
Road level translation signal is overlapped, and obtains the first via encoded signal at current time；
Second tunnel encoded signal acquiring unit, second for the second tunnel level translation signal and last moment to current time
Road level translation signal is overlapped, and obtains the second tunnel encoded signal at current time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610438678.7A CN106160865B (en) | 2016-06-17 | 2016-06-17 | Modulation, demodulation method and the device of signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610438678.7A CN106160865B (en) | 2016-06-17 | 2016-06-17 | Modulation, demodulation method and the device of signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106160865A CN106160865A (en) | 2016-11-23 |
| CN106160865B true CN106160865B (en) | 2018-11-23 |
Family
ID=57352922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610438678.7A Active CN106160865B (en) | 2016-06-17 | 2016-06-17 | Modulation, demodulation method and the device of signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106160865B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566312B (en) * | 2017-09-13 | 2019-09-06 | 北京邮电大学 | A kind of quadrature amplitude modulation method and device based on loop iteration coding |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6399621A (en) * | 1986-10-15 | 1988-04-30 | Nec Corp | Ppm demodulation circuit |
| CN101321015A (en) * | 2008-06-20 | 2008-12-10 | 中国科学院上海光学精密机械研究所 | Full-digitalization pulse position modulation signal receiver |
| CN101488809A (en) * | 2008-01-15 | 2009-07-22 | 日本电气株式会社 | Optical transmitter, optical transmission system and modulation scheme selection method |
| CN103379049A (en) * | 2012-04-14 | 2013-10-30 | 兰州理工大学 | Wireless optical communication channel estimation and soft-demodulation method by using 4PPM digital modulation mode |
| CN103634052A (en) * | 2012-08-21 | 2014-03-12 | 北京邮电大学 | Optical modulation system and method thereof |
-
2016
- 2016-06-17 CN CN201610438678.7A patent/CN106160865B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6399621A (en) * | 1986-10-15 | 1988-04-30 | Nec Corp | Ppm demodulation circuit |
| CN101488809A (en) * | 2008-01-15 | 2009-07-22 | 日本电气株式会社 | Optical transmitter, optical transmission system and modulation scheme selection method |
| CN101321015A (en) * | 2008-06-20 | 2008-12-10 | 中国科学院上海光学精密机械研究所 | Full-digitalization pulse position modulation signal receiver |
| CN103379049A (en) * | 2012-04-14 | 2013-10-30 | 兰州理工大学 | Wireless optical communication channel estimation and soft-demodulation method by using 4PPM digital modulation mode |
| CN103634052A (en) * | 2012-08-21 | 2014-03-12 | 北京邮电大学 | Optical modulation system and method thereof |
Non-Patent Citations (2)
| Title |
|---|
| An Optical Pulse Position Modulation Based On Double-Circle Iteration;Wei Xia,etal.;《2016 15th International Conference on Optical Communications and Networks (ICOCN)》;20160927;第1-3页 * |
| 自由空间光通信中的PPM迭代软解调算法;张鼎臣等;《计算机工程》;20130415;第1-4页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106160865A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110266615A (en) | Low ISI is than low-power interchip communication method and apparatus | |
| CN105814855A (en) | Pre-coding in a faster-than-Nyquist transmission system | |
| CN104270227B (en) | Based on the empty safe transmission method of physical layer for moving keying in MISO system | |
| CN102124666A (en) | Analog space-time relay method and apparatus for a wireless communication relay channel | |
| CN110602017B (en) | Non-orthogonal multiple access decoding method | |
| CN103546402A (en) | Signal sending method, device and system | |
| CN107018105A (en) | Visible light communication method and system under water | |
| CN105323203B (en) | Anti- more way underwater acoustic communication methods of expansion technology are swept based on quadrature carrier | |
| CN104717171B (en) | The leading design and channel estimation methods of multicolor visible light DCO ofdm communication systems | |
| CN103905150A (en) | Self-adaptive transmission method and system based on bit division multiplexing | |
| CN106160865B (en) | Modulation, demodulation method and the device of signal | |
| CN110290083A (en) | Multicarrier difference chaotic Demodulation Systems method based on low-rank matrix estimation | |
| CN104767702A (en) | Phase jump elimination method and device of single-carrier coherent light communication system | |
| CN106656879B (en) | A kind of high-speed and High-order variable-step self-adaptive equalization methods | |
| CN108983155A (en) | A kind of radar-communication integration waveform design method | |
| Moeneclaey | Synchronization problems in PAM systems | |
| Tao et al. | Matrix reconstruction algorithm-assisted multi-carrier DCSK scheme: An effective solution for frequency-selective fading channel | |
| CN108880691B (en) | Method, apparatus and computer readable medium for demodulating a signal | |
| CN112073156B (en) | High-dimensional non-orthogonal transmission method | |
| US9521026B1 (en) | Tomlinson-harashima precoding with non-overlapping dynamic modulation coding subsets | |
| Rode et al. | Geometric constellation shaping with low-complexity demappers for wiener phase-noise channels | |
| CN104601233B (en) | MIMO visible light communication methods based on carrier wave distribution with ICA algorithm | |
| WO2019127933A1 (en) | Bidirectional qr decomposition and detection method and apparatus | |
| CN104868976A (en) | Network coding method | |
| CN105119855B (en) | A kind of modulation and demodulation method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |