CN108631879A - A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping - Google Patents
A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping Download PDFInfo
- Publication number
- CN108631879A CN108631879A CN201810455518.2A CN201810455518A CN108631879A CN 108631879 A CN108631879 A CN 108631879A CN 201810455518 A CN201810455518 A CN 201810455518A CN 108631879 A CN108631879 A CN 108631879A
- Authority
- CN
- China
- Prior art keywords
- signal
- ofdm
- signals
- qam
- analog
- 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.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 23
- 238000007493 shaping process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000013507 mapping Methods 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 239000013307 optical fiber Substances 0.000 claims abstract description 26
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 20
- 101150071746 Pbsn gene Proteins 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 6
- 229910002056 binary alloy Inorganic materials 0.000 claims description 4
- 101100371175 Homo sapiens TSPO gene Proteins 0.000 abstract 2
- 102100031269 Putative peripheral benzodiazepine receptor-related protein Human genes 0.000 abstract 2
- 238000004088 simulation Methods 0.000 abstract 2
- 239000000835 fiber Substances 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of light orthogonal frequency division multiplexing communication methods based on probability shaping mapping and system, method to include：Generate pseudo-random binary bit stream PBRS signals；PRBS signals are modulated and obtain PS QAM complex signals；PS QAM complex signals are subjected to serial/parallel conversion, inverse fast Fourier transform and parallel/serial conversion and obtain base band OFDM signal, and obtain the OFDM baseband signals of addition cyclic prefix；It is modulated to acquisition PS OOFDM signals on light carrier after carrying out D/A switch to OFDM baseband signals and is transferred to optical fiber；PS OOFDM signals on optical fiber are transformed into simulation OFDM electric signals；Simulation OFDM electric signals are subjected to analog/digital conversion and obtain digital OFDM signal, remove cyclic prefix, Fast Fourier Transform (FFT) is carried out after parallel/serial conversion and obtains PS QAM complex signals；The real part imaginary part of PS QAM complex signals is detached, demapping restores corresponding PBRS signals.The present invention can obtain reshaping gain and improve the spectrum efficiency of fiber optic communication.
Description
Technical Field
The invention relates to a digital modulation technology in the field of optical fiber communication, in particular to an optical orthogonal frequency division multiplexing communication method and system based on probability shaping mapping.
Background
With the increase of transmission demand of users, optical fiber communication is becoming a main direction of communication as a long-distance and large-capacity transmission mode. The Optical Orthogonal Frequency Division Multiplexing (OOFDM) technology combines the traditional OFDM technology with the optical fiber communication technology, has the advantages of high-speed OFDM access, large information capacity, good dispersion resistance of optical fiber transmission and polarization mode dispersion, and has wide application prospect.
Quadrature Amplitude Modulation (Quadrature Amplitude Modulation) higher spectral efficiency can be obtained by joint Modulation of phase and Amplitude. The constellation diagram of the common QAM is distributed in a rectangular grid, the more points in the constellation diagram, the larger the information amount transmitted by each symbol, but the smaller the distance between the constellation points, the higher the requirement on a demodulation algorithm and the higher the error rate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an optical orthogonal frequency division multiplexing communication method and system based on probability shaping mapping, which can obtain shaping gain and improve the spectral efficiency of optical fiber communication.
In order to achieve the purpose, the technical scheme of the invention is as follows:
on one hand, the invention discloses an optical orthogonal frequency division multiplexing communication method based on probability shaping mapping, which comprises the following steps:
generating a pseudo-random binary bit stream (PBRS) signal by a pseudo-random binary encoder;
modulating the PRBS signal to obtain a PS-QAM complex signal;
performing serial/parallel conversion on the PS-QAM complex signal to obtain N paths of parallel complex signals, performing fast Fourier inverse transformation on the N paths of parallel complex signals, and performing parallel/serial conversion to obtain a baseband OFDM signal; adding a cyclic prefix in a baseband OFDM signal to obtain an OFDM baseband signal added with the cyclic prefix; performing digital/analog conversion on the OFDM baseband signal to obtain an OFDM analog signal; modulating the OFDM analog signal to an optical carrier to obtain a PS-OOFDM signal; transmitting the PS-OOFDM signals to an optical fiber;
converting the PS-OOFDM signals on the optical fiber into analog OFDM electrical signals; performing analog/digital conversion on the analog OFDM electric signal to obtain a digital OFDM signal, removing a cyclic prefix, performing fast Fourier transform after parallel/serial conversion to obtain a PS-QAM complex signal; and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping to recover a corresponding PBRS signal.
Preferably, modulating the PRBS signal to obtain a PS-QAM complex signal includes:
generating a length of 2 from a Maxwell-Boltzmann distributionn+1The offline probability codebook of (a);
dividing the binary bit stream PBRS signal into two paths of bit sequences with equal length;
one path of bit sequence generates 2 every n +1 code elementsn+1Carrying out a system symbol L, acquiring an L-th symbol from an offline probability codebook to generate a real part of a PS-QAM signal; make another path of bit sequence generate a 2 every n +1 code elementsn+1A binary system symbol L, wherein the symbol of the L-th bit is acquired in an offline probability codebook to generate an imaginary part of the PS-QAM signal; whereinM is an even power of 2 and represents the order of the QAM modulation format.
Preferably, the real part and the imaginary part of the PS-QAM complex signal are separated, and the corresponding PBRS signal is recovered by demapping, specifically:
and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping and recovering the corresponding PBRS signal according to the offline probability codebook respectively.
Preferably, the generating method of the offline probability codebook specifically includes:
according to Maxwell-Boltzmann distributionProduce a length of 2n+1Off-line summary ofA rate codebook; wherein,and v represents a probability factor, belongs to R, and is valued according to corresponding parameters in practical application.
Preferably, the PS-OOFDM signal on the optical fiber is converted into an analog OFDM electrical signal, specifically:
and the PS-OOFDM signals on the optical fibers are subjected to photoelectric conversion into analog OFDM electric signals by adopting a photoelectric detector.
In another aspect, the present invention provides an optical orthogonal frequency division multiplexing communication system based on probability shaping mapping, comprising:
a data generation module for generating a pseudo-random binary bit stream PBRS signal by a pseudo-random binary encoder;
the probability shaping module is used for modulating the PRBS signal to obtain a PS-QAM complex signal;
the PS-OOFDM signal modulation module is used for performing serial/parallel conversion on the PS-QAM complex signal to obtain N paths of parallel complex signals, performing fast Fourier inverse transformation on the N paths of parallel complex signals, and performing parallel/serial conversion to obtain a baseband OFDM signal; adding a cyclic prefix in a baseband OFDM signal to obtain an OFDM baseband signal added with the cyclic prefix; performing digital/analog conversion on the OFDM baseband signal to obtain an OFDM analog signal; modulating the OFDM analog signal to an optical carrier to obtain a PS-OOFDM signal; transmitting the PS-OOFDM signals to an optical fiber;
the PS-OFDM transmission module is used for converting the PS-OOFDM signals on the optical fiber into analog OFDM electric signals; performing analog/digital conversion on the analog OFDM electric signal to obtain a digital OFDM signal, removing a cyclic prefix, performing fast Fourier transform after parallel/serial conversion to obtain a PS-QAM complex signal; and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping to recover a corresponding PBRS signal.
Preferably, the modulating the PRBS signal to obtain a PS-QAM complex signal specifically includes:
generating a length of 2 from a Maxwell-Boltzmann distributionn+1The offline probability codebook of (a);
dividing the binary bit stream PBRS signal into two paths of bit sequences with equal length;
one path of bit sequence generates 2 every n +1 code elementsn+1Carrying out a system symbol L, acquiring an L-th symbol from an offline probability codebook to generate a real part of a PS-QAM signal; make another path of bit sequence generate a 2 every n +1 code elementsn+1A binary system symbol L, wherein the symbol of the L-th bit is acquired in an offline probability codebook to generate an imaginary part of the PS-QAM signal; whereinM is an even power of 2 and represents the order of the QAM modulation format.
Preferably, the real part and the imaginary part of the PS-QAM complex signal are separated, and the corresponding PBRS signal is recovered by demapping, specifically:
and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping and recovering the corresponding PBRS signal according to the offline probability codebook respectively.
Preferably, the generating method of the offline probability codebook specifically includes:
according to Maxwell-Boltzmann distributionProduce a length of 2n+1The offline probability codebook of (a); wherein,and v represents a probability factor, belongs to R, and is valued according to corresponding parameters in practical application.
Preferably, the PS-OOFDM signal on the optical fiber is converted into an analog OFDM electrical signal, specifically:
and the PS-OOFDM signals on the optical fibers are subjected to photoelectric conversion into analog OFDM electric signals by adopting a photoelectric detector.
The invention has the following beneficial effects:
the invention relates to an optical orthogonal frequency division multiplexing communication method and system based on probability shaping mapping, which obtains a signal with higher quality and enables a demodulation algorithm to have higher universality by using a probability mapping method; meanwhile, an off-line probability codebook of probability mapping is calculated according to Maxwell-Boltzmann distribution, so that the signal quality is obviously improved. In addition, the generated binary bit stream PBRS signal is divided into two paths of bit sequences with equal length, and higher sensitivity of the optical receiver can be realized.
The present invention will be described in further detail with reference to the accompanying drawings and embodiments, but the method and system for optical orthogonal frequency division multiplexing communication based on probability shaping mapping according to the present invention are not limited to the embodiments.
Drawings
Fig. 1 is a flow chart of OOFDM signal modulation in an embodiment of the present invention;
FIG. 2 is a block diagram of a PS-OOFDM signal demodulation process according to an embodiment of the invention;
FIG. 3 is a constellation probability distribution diagram according to an embodiment of the present invention;
FIG. 4 is a Maxwell-Boltzmann distribution histogram of an embodiment of the present invention;
FIG. 5 is a diagram of signal point distribution of a PS-16-QAM constellation diagram according to an embodiment of the present invention;
FIG. 6 is a probability codebook map according to an embodiment of the present invention;
fig. 7 is a flow chart of a PS-OOFDM system according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
Referring to fig. 1 to 6, in one aspect, the present invention is an optical orthogonal frequency division multiplexing (PS-OOFDM) communication method based on probability shaping (probability mapping), taking 16-QAM as an example, and the method includes:
step 1) according to Maxwell-Boltzmann distribution
(xi＝[-3,-1,1,3]Taking v ═ 0.384) to generate an optimal lookup table (lookup table) with length of 8, as shown in fig. 6, i.e. an offline probability codebook, and the probability distribution thereof is shown in fig. 4.
Step 2) generating a pseudo-random binary bit stream (PBRS signal) by a pseudo-random binary encoder. Generating a new 8-ary symbol L by each 3-bit binary code of one path of PRBS signal, generating a real part of a QAM signal according to the symbol of the L-th bit in a lookup table, generating an imaginary part of the QAM signal by the other path of PRBS signal in the same way, mapping the two paths of signals into a complete PS-16-QAM complex signal, and referring to a constellation diagram in FIG. 5 and probability distribution in FIG. 3.
And 3) carrying out fast Fourier inverse transformation on the PS-16-QAM complex signal and carrying out parallel/serial conversion to obtain a baseband OFDM signal. And adding a cyclic prefix in the baseband OFDM signal to obtain an OFDM baseband signal added with the cyclic prefix, and performing digital-to-analog conversion on the OFDM baseband signal to obtain an OFDM analog signal. An OFDM analog signal is modulated onto an optical carrier by using a Mach-Zehnder modulator (MZM), and the obtained PS-OOFDM signal is transmitted through an SSMF optical fiber.
And 4) performing photoelectric conversion on the PS-OOFDM signal by using a photodiode to obtain an analog OFDM signal, performing analog/digital conversion on the analog OFDM signal to obtain a digital OFDM signal, removing a cyclic prefix in the digital OFDM signal, and performing fast Fourier transform on the digital OFDM signal to obtain a PS-QAM complex signal.
And 5) separating the PS-16-QAM complex signal to obtain a real part signal and an imaginary part signal, and respectively demodulating and recovering the corresponding PRBS sequence according to the probability codebook.
Referring to fig. 7, in another aspect, an optical orthogonal frequency division multiplexing communication system based on probability shaping mapping according to the present invention includes: the device comprises a data generation module, a probability shaping module, a PS-OOFDM signal modulation module and a PS-OFDM transmission module.
The data generation module is used for generating a PRBS signal of a pseudo-random binary bit stream with the length of 10w bits.
The probability shaping module is used for shaping the probability of the target,
first, the distribution is based on Maxwell-Boltzmann distribution Produce a length of 2n+1Offline probability codebook (Lookup table).
Secondly, the binary bit stream PBRS signal is divided into two paths of bit sequences with equal length. One path of PRBS signal generates one 2 per n +1 bit binary coden+1And carrying out a system symbol L, and acquiring an L-th symbol in an offline probability codebook to generate a real part of the PS-QAM signal. The other PRBS signal generates the imaginary part of the PS-QAM signal in the same way.
The PS-OOFDM signal modulation module:
the device is used for performing serial/parallel conversion on the PS-QAM complex signal to obtain N paths of parallel complex signals, performing fast Fourier inverse transformation on the N paths of parallel signals, and performing parallel/serial conversion to obtain a baseband OFDM signal. And adding a cyclic prefix in the baseband OFDM signal to obtain an OFDM baseband signal added with the cyclic prefix, and performing digital-to-analog conversion on the OFDM baseband signal to obtain an OFDM analog signal. Modulating the OFDM analog signal to an optical carrier to obtain a PS-OOFDM signal, and transmitting the PS-OOFDM signal to an optical fiber.
The PS-OFDM transmission module:
the system is used for transmitting the PS-OOFDM signals through single-mode optical fibers of a 50km SSMF standard, photoelectric conversion is carried out on the PS-OOFDM signals through a photodiode at a system receiving end to obtain analog OFDM electric signals, the analog OFDM signals are subjected to analog/digital conversion to obtain digital OFDM signals, cyclic prefixes in the digital OFDM signals are removed in the DSP, then the real parts and imaginary parts of the PS-QAM complex signals are obtained through fast Fourier transform, the real parts and the imaginary parts of the PS-QAM complex signals are separated, and the real parts and the imaginary parts of the PS-OOFDM signals are demodulated and recovered according to a probability codebook.
The above is only one preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments, and any equivalent changes and modifications made according to the present invention, which do not bring out the functional effects beyond the scope of the present invention, belong to the protection scope of the present invention.
Claims (10)
1. An optical orthogonal frequency division multiplexing communication method based on probability shaping mapping, comprising:
generating a pseudo-random binary bit stream (PBRS) signal by a pseudo-random binary encoder;
modulating the PRBS signal to obtain a PS-QAM complex signal;
performing serial/parallel conversion on the PS-QAM complex signal to obtain N paths of parallel complex signals, performing fast Fourier inverse transformation on the N paths of parallel complex signals, and performing parallel/serial conversion to obtain a baseband OFDM signal; adding a cyclic prefix in a baseband OFDM signal to obtain an OFDM baseband signal added with the cyclic prefix; performing digital/analog conversion on the OFDM baseband signal to obtain an OFDM analog signal; modulating the OFDM analog signal to an optical carrier to obtain a PS-OOFDM signal; transmitting the PS-OOFDM signals to an optical fiber;
converting the PS-OOFDM signals on the optical fiber into analog OFDM electrical signals; performing analog/digital conversion on the analog OFDM electric signal to obtain a digital OFDM signal, removing a cyclic prefix, performing fast Fourier transform after parallel/serial conversion to obtain a PS-QAM complex signal; and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping to recover a corresponding PBRS signal.
2. The optical orthogonal frequency division multiplexing communication method based on probability shaping mapping according to claim 1, wherein modulating the PRBS signal to obtain a PS-QAM complex signal specifically comprises:
generating a length of 2 from a Maxwell-Boltzmann distributionn+1The offline probability codebook of (a);
dividing the binary bit stream PBRS signal into two paths of bit sequences with equal length;
one path of bit sequence generates 2 every n +1 code elementsn+1Carrying out a system symbol L, acquiring an L-th symbol from an offline probability codebook to generate a real part of a PS-QAM signal; make another path of bit sequence generate a 2 every n +1 code elementsn+1A binary system symbol L, wherein the symbol of the L-th bit is acquired in an offline probability codebook to generate an imaginary part of the PS-QAM signal; whereinM is an even power of 2 and represents the order of the QAM modulation format.
3. The optical orthogonal frequency division multiplexing communication method based on probability shaping mapping according to claim 2, wherein the real part and the imaginary part of the PS-QAM complex signal are separated, and the corresponding PBRS signal is recovered by demapping, specifically:
and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping and recovering the corresponding PBRS signal according to the offline probability codebook respectively.
4. The method according to claim 2, wherein the generating of the offline probability codebook specifically comprises:
according to Maxwell-Boltzmann distributionProduce a length of 2n+1The offline probability codebook of (a); wherein,nu represents a probability factor, and nu belongs to R.
5. The method according to claim 1, wherein the PS-OOFDM signal on the optical fiber is converted into an analog OFDM electrical signal, specifically:
and the PS-OOFDM signals on the optical fibers are subjected to photoelectric conversion into analog OFDM electric signals by adopting a photoelectric detector.
6. An optical orthogonal frequency division multiplexing communication system based on probability shaping mapping, comprising:
a data generation module for generating a pseudo-random binary bit stream PBRS signal by a pseudo-random binary encoder;
the probability shaping module is used for modulating the PRBS signal to obtain a PS-QAM complex signal;
the PS-OOFDM signal modulation module is used for performing serial/parallel conversion on the PS-QAM complex signal to obtain N paths of parallel complex signals, performing fast Fourier inverse transformation on the N paths of parallel complex signals, and performing parallel/serial conversion to obtain a baseband OFDM signal; adding a cyclic prefix in a baseband OFDM signal to obtain an OFDM baseband signal added with the cyclic prefix; performing digital/analog conversion on the OFDM baseband signal to obtain an OFDM analog signal; modulating the OFDM analog signal to an optical carrier to obtain a PS-OOFDM signal; transmitting the PS-OOFDM signals to an optical fiber;
the PS-OFDM transmission module is used for converting the PS-OOFDM signals on the optical fiber into analog OFDM electric signals; performing analog/digital conversion on the analog OFDM electric signal to obtain a digital OFDM signal, removing a cyclic prefix, performing fast Fourier transform after parallel/serial conversion to obtain a PS-QAM complex signal; and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping to recover a corresponding PBRS signal.
7. The optical orthogonal frequency division multiplexing communication system based on probability shaping mapping according to claim 6, wherein modulating the PRBS signal to obtain a PS-QAM complex signal specifically comprises:
generating a length of 2 from a Maxwell-Boltzmann distributionn+1The offline probability codebook of (a);
dividing the binary bit stream PBRS signal into two paths of bit sequences with equal length;
one path of bit sequence generates 2 every n +1 code elementsn+1Carrying out a system symbol L, acquiring an L-th symbol from an offline probability codebook to generate a real part of a PS-QAM signal; make another path of bit sequence generate a 2 every n +1 code elementsn+1A binary system symbol L, wherein the symbol of the L-th bit is acquired in an offline probability codebook to generate an imaginary part of the PS-QAM signal; whereinM is an even power of 2 and represents the order of the QAM modulation format.
8. The optical orthogonal frequency division multiplexing communication system based on probability shaping mapping according to claim 2, wherein the real part and the imaginary part of the PS-QAM complex signals are separated, and demapping is performed to recover the corresponding PBRS signals, specifically:
and separating the real part and the imaginary part of the PS-QAM complex signal, and demapping and recovering the corresponding PBRS signal according to the offline probability codebook respectively.
9. The method according to claim 7, wherein the generating of the offline probability codebook specifically comprises:
according to Maxwell-Boltzmann distributionProduce a length of 2n+1The offline probability codebook of (a); wherein,nu represents a probability factor, and nu belongs to R.
10. The method according to claim 5, wherein the PS-OOFDM signal on the optical fiber is converted into an analog OFDM electrical signal, specifically:
and the PS-OOFDM signals on the optical fibers are subjected to photoelectric conversion into analog OFDM electric signals by adopting a photoelectric detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810455518.2A CN108631879B (en) | 2018-05-14 | 2018-05-14 | A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810455518.2A CN108631879B (en) | 2018-05-14 | 2018-05-14 | A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108631879A true CN108631879A (en) | 2018-10-09 |
| CN108631879B CN108631879B (en) | 2019-11-12 |
Family
ID=63693159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810455518.2A Active CN108631879B (en) | 2018-05-14 | 2018-05-14 | A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108631879B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109104250A (en) * | 2018-10-11 | 2018-12-28 | 南京信息工程大学 | Light probability based on star-like 24QAM mapping forms coding method |
| CN109217933A (en) * | 2018-09-03 | 2019-01-15 | 南京信息工程大学 | Carrierless amplitude phase modulator approach and demodulation method based on probability forming |
| CN109412999A (en) * | 2018-12-24 | 2019-03-01 | 北京邮电大学 | A kind of molding mapping method of probability and device |
| CN109756438A (en) * | 2019-02-01 | 2019-05-14 | 华侨大学 | OOFDM method and system based on LDPC coding possibilities shaping mapping |
| CN110278031A (en) * | 2019-06-10 | 2019-09-24 | 华侨大学 | Direct detection optical fiber telecommunications system and communication means based on many-one mapping PS-PAM4 |
| CN110311732A (en) * | 2019-06-10 | 2019-10-08 | 华侨大学 | A kind of WDM-PON system and communication means based on PS-PAM4 |
| CN111083078A (en) * | 2019-12-11 | 2020-04-28 | 华中科技大学 | Probability shaping quadrature amplitude modulation format blind identification method and system |
| CN111092663A (en) * | 2019-12-05 | 2020-05-01 | 华侨大学 | Optical orthogonal frequency division multiplexing system and communication method based on bit weighted distribution |
| WO2020135458A1 (en) * | 2018-12-26 | 2020-07-02 | 华为技术有限公司 | Method and apparatus for modulating and demodulating quadrature amplitude modulation (qam) signal |
| CN111641438A (en) * | 2020-04-27 | 2020-09-08 | 苏州大学 | System, method and processor readable medium for estimating number of RFID tags |
| CN115567162A (en) * | 2022-09-29 | 2023-01-03 | 南京信息工程大学 | Probability constellation shaping method and system, and optical communication method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010131125A1 (en) * | 2009-05-11 | 2010-11-18 | Turkcell Iletisim Hizmetleri Anonim Sirketi | Constellation shaping for ofdm |
| CN103607262A (en) * | 2013-10-25 | 2014-02-26 | 河海大学 | Two-stage pre-coding method in space-time block coding MIMO system |
| US20140072307A1 (en) * | 2012-09-07 | 2014-03-13 | Futurewei Technologies, Inc. | Channel Estimation for Optical Orthogonal Frequency Division Multiplexing Systems |
| CN106411333A (en) * | 2006-04-27 | 2017-02-15 | 克雷斯特姆公司 | Signal processing system and method for processing signals |
-
2018
- 2018-05-14 CN CN201810455518.2A patent/CN108631879B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411333A (en) * | 2006-04-27 | 2017-02-15 | 克雷斯特姆公司 | Signal processing system and method for processing signals |
| WO2010131125A1 (en) * | 2009-05-11 | 2010-11-18 | Turkcell Iletisim Hizmetleri Anonim Sirketi | Constellation shaping for ofdm |
| US20140072307A1 (en) * | 2012-09-07 | 2014-03-13 | Futurewei Technologies, Inc. | Channel Estimation for Optical Orthogonal Frequency Division Multiplexing Systems |
| CN103607262A (en) * | 2013-10-25 | 2014-02-26 | 河海大学 | Two-stage pre-coding method in space-time block coding MIMO system |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217933A (en) * | 2018-09-03 | 2019-01-15 | 南京信息工程大学 | Carrierless amplitude phase modulator approach and demodulation method based on probability forming |
| CN109217933B (en) * | 2018-09-03 | 2021-06-11 | 南京信息工程大学 | Carrier-free amplitude and phase modulation method and demodulation method based on probability forming |
| CN109104250B (en) * | 2018-10-11 | 2021-04-13 | 南京信息工程大学 | Star 24QAM mapping-based optical probability forming coding method |
| CN109104250A (en) * | 2018-10-11 | 2018-12-28 | 南京信息工程大学 | Light probability based on star-like 24QAM mapping forms coding method |
| CN109412999A (en) * | 2018-12-24 | 2019-03-01 | 北京邮电大学 | A kind of molding mapping method of probability and device |
| CN109412999B (en) * | 2018-12-24 | 2020-04-17 | 北京邮电大学 | Mapping method and device for probability modeling |
| US11349698B2 (en) | 2018-12-26 | 2022-05-31 | Huawei Technologies Co., Ltd. | Quadrature amplitude modulation QAM signal modulation method and apparatus, and quadrature amplitude modulation QAM signal demodulation method and apparatus |
| CN111371530B (en) * | 2018-12-26 | 2022-03-25 | 海思光电子有限公司 | Quadrature Amplitude Modulation (QAM) signal modulation and demodulation method and device |
| WO2020135458A1 (en) * | 2018-12-26 | 2020-07-02 | 华为技术有限公司 | Method and apparatus for modulating and demodulating quadrature amplitude modulation (qam) signal |
| CN111371530A (en) * | 2018-12-26 | 2020-07-03 | 海思光电子有限公司 | Quadrature Amplitude Modulation (QAM) signal modulation and demodulation method and device |
| CN109756438A (en) * | 2019-02-01 | 2019-05-14 | 华侨大学 | OOFDM method and system based on LDPC coding possibilities shaping mapping |
| CN109756438B (en) * | 2019-02-01 | 2021-06-29 | 华侨大学 | OOFDM method and system based on LDPC coding probability shaping mapping |
| CN110278031A (en) * | 2019-06-10 | 2019-09-24 | 华侨大学 | Direct detection optical fiber telecommunications system and communication means based on many-one mapping PS-PAM4 |
| CN110311732A (en) * | 2019-06-10 | 2019-10-08 | 华侨大学 | A kind of WDM-PON system and communication means based on PS-PAM4 |
| CN111092663A (en) * | 2019-12-05 | 2020-05-01 | 华侨大学 | Optical orthogonal frequency division multiplexing system and communication method based on bit weighted distribution |
| CN111092663B (en) * | 2019-12-05 | 2022-07-01 | 华侨大学 | Optical orthogonal frequency division multiplexing system and communication method based on bit weighted distribution |
| CN111083078A (en) * | 2019-12-11 | 2020-04-28 | 华中科技大学 | Probability shaping quadrature amplitude modulation format blind identification method and system |
| CN111641438A (en) * | 2020-04-27 | 2020-09-08 | 苏州大学 | System, method and processor readable medium for estimating number of RFID tags |
| CN115567162A (en) * | 2022-09-29 | 2023-01-03 | 南京信息工程大学 | Probability constellation shaping method and system, and optical communication method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108631879B (en) | 2019-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108631879B (en) | A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping | |
| Darwazeh et al. | Optical SEFDM system; bandwidth saving using non-orthogonal sub-carriers | |
| Tao et al. | Advanced modulation formats for short reach optical communication systems | |
| US9515767B2 (en) | Multi-channel optical transceiver with offset quadrature amplitude modulation | |
| Kaneda et al. | Real-time 2.5 GS/s coherent optical receiver for 53.3-Gb/s sub-banded OFDM | |
| CN101310458B (en) | Methods and apparatus for optical transmission of digital signals | |
| US9281980B2 (en) | Receiving apparatus and method, sending apparatus and method, front-end circuit, modulator, and transceiving system | |
| US8718160B2 (en) | Multi-carrrier optical communication method and system based on DAPSK | |
| CN110178321B (en) | Signal transmitting method and device, transmitter and signal transmission system | |
| US20190052388A1 (en) | System and method for optical signal transmission | |
| Tao et al. | High order CAP system using DML for short reach optical communications | |
| Chen et al. | Subtraction-clustering-based modulation format identification in Stokes space | |
| Chen et al. | Real-Time Generation and Reception of OFDM Signals for $ X $-Band RoF Uplink With Heterodyne Detection | |
| CN110149295A (en) | A method of companding transform United Technologies are spread and normalized based on DFT reduces P-OFDM system PAPR | |
| CN116155385A (en) | Multicarrier modulation scheme based on orthogonal chirp multiplexing signal reconstruction under KK relation | |
| JP2018042073A (en) | Optical transmitter, optical transmission system and optical receiver | |
| US20130051804A1 (en) | Ofdm optical transmitter and transmission method, and ofdm optical receiver and reception method | |
| CN111181651A (en) | Four-dimensional coding modulation system for improving transmission rate | |
| CN111092663B (en) | Optical orthogonal frequency division multiplexing system and communication method based on bit weighted distribution | |
| CN105610516A (en) | Optical modulation method based on ultra-Nyquist system and corresponding demodulation method thereof | |
| CN106877934A (en) | Carrier wave suppression mode light-carried wireless vector wave system based on phase factor optimization | |
| Liu et al. | PAPR reduction based on improved Nyquist pulse shaping technology in OFDM-RoF systems | |
| CN112202543B (en) | High-order modulation format chaotic secret communication method | |
| Zhang et al. | Channel estimation based on linear interpolation algorithm in DDO-OFDM system | |
| CN103516428A (en) | Optical fiber transmission system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |