CN106936512A - Optical signal transmitter and light signal receiving and optical fiber telecommunications system - Google Patents
Optical signal transmitter and light signal receiving and optical fiber telecommunications system Download PDFInfo
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- CN106936512A CN106936512A CN201710121216.7A CN201710121216A CN106936512A CN 106936512 A CN106936512 A CN 106936512A CN 201710121216 A CN201710121216 A CN 201710121216A CN 106936512 A CN106936512 A CN 106936512A
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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
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
- H04B10/6163—Compensation of non-linear effects in the fiber optic link, e.g. self-phase modulation [SPM], cross-phase modulation [XPM], four wave mixing [FWM]
-
- 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
- H04B10/69—Electrical arrangements in the receiver
- H04B10/693—Arrangements for optimizing the preamplifier in the receiver
- H04B10/6933—Offset control of the differential preamplifier
-
- 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
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
- H04L27/3872—Compensation for phase rotation in the demodulated signal
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Nonlinear Science (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of optical fiber telecommunications system, including the first communication device and secondary communication device interconnected by optical fiber.First communication device utilizes optical fiber by data signal transmission to be sent to secondary communication device suitable for wirelessly receiving radiofrequency signal with 3GPP or CDMA2000 technical standards.Secondary communication device can be demodulated to the signal for receiving, and restore data-signal, so as to carry out subsequent treatment.
Description
Technical field
The present invention relates to communication system and device, more particularly to a kind of optical signal transmitter and light signal receiving and
Optical fiber telecommunications system.
Background technology
Cooperation between third generation cooperative partner program (3GPP) Shi Ge telecommunications industry associations group, it is intended to the definition whole world and is applicable
The third generation (3G) mobile phone specification.3GPP Long Term Evolutions (LTE) are intended to improve Universal Mobile Telecommunications System (UMTS) shifting
The 3GPP projects of mobile phone standard.The specification of 3GPP definables next generation mobile networks, mobile system and mobile device.
3GPP specifications are based on global system for mobile communications (GSM) specification of evolution, and the latter is commonly referred to as General Mobile electricity
Letter system (UMTS).3GPP standards are construed as being each version.Therefore, in Chang Zhiyi version of discussion of 3GPP or another version
Feature.For example, version 99 defines the UMTS third generations (3G) network for including CDMA air interfaces.Version 6 is integrated
Operation with WLAN (LAN) network simultaneously with the addition of High Speed Uplink Packet access (HUSPA).Version 8 introduces double
Downlink carrier, and dual carrier operation is expanded to version 9 up-link of UMTS.
CDMA2000 is the third generation that employing code division multiple access (CDMA) sends voice, data and signaling between a wireless devices
(3G) technical standard race.CDMA2000 may include that CDMA20001X, CDMA2000EV-DO revised edition 0, CDMA2000EV-DO are repaiied
Order an edition A and CDMA2000EV-DO revised editions B.1x or 1xRTT refer to core CDMA2000 wireless air interface standards.1x is more
Specifically refer to 1 times of radio transmission techniques and indicate and radio frequency (RF) bandwidth identical RF bandwidth used in IS-95.
64 additional traffic channels are added to forward link by 1xRTT.EV-DO refers to that evolution data is optimized.EV-DO is for leading to
Crossing radio signal carries out the telecommunication standard being wirelessly transferred of data.
The content of the invention
Present invention aim at a kind of optical signal transmitter of offer and light signal receiving and optical fiber telecommunications system.
According to an aspect of the invention, there is provided a kind of optical signal transmitter, including：Rf signal reception portion, hair
The number of delivering letters modulation portion, training signal generating unit, training signal assignment portion, signal multiplexing portion and electro-optic conversion portion,
Rf signal reception portion, radiofrequency signal is received through antenna, radiofrequency signal is demodulated into baseband signal, by baseband signal solution
Code, obtains binary data signal,
Signal modulation portion, is modulated to binary data signal, exports sending signal,
Training signal generating unit, generates binary system training signal,
Training signal assignment portion, in the training signal that the power output based on signal modulation portion is exported to training signal generating unit
Binary character assignment,
Signal multiplexing portion, the sending signal of the portion's of modulating signals into output and the training signal of training signal assignment portion output are used as defeated
Enter, generate composite signal,
Electro-optic conversion portion, the composite signal that signal multiplexing portion is exported carries out electro-optic conversion as input, believes to optical fiber output light
Number.
Further, the binary character in training signal characterizes the power output in signal modulation portion.
Further, the training signal that signal multiplexing portion periodically exports training sequence signal assignment portion inserts signal
The sending signal of modulation portion output.
Further, signal multiplexing portion sends data-signal and training signal and carries out time-multiplexed, Ns according to every Ns
It is the integer more than or equal to 1.
Further, the clock for being produced using clock circuit makes signal modulation portion, training signal generating unit and training signal
Assignment portion synchronization, so that insertion characterizes the training per the binary character in the training signal after the Ns assignment of sending signal
The power output of Ns sending signal after signal.
According to another aspect of the present invention, there is provided a kind of light signal receiving, including photoelectric conversion part, power inspection
Survey portion, bandpass filter, Analog to Digital Converter section, thermal compensation signal calculating part, variable power amplifier, signal demodulation section,
Photoelectric conversion part, electric signal is converted to by the optical signal received from optical fiber,
Power detection portion, receives the electric signal of photoelectric conversion part output, calculates the receiving power of signal,
Bandpass filter, receives the electric signal of photoelectric conversion part output, carries out bandpass filtering,
Analog to Digital Converter section, to the filtering signal simulation/digital conversion from bandpass filter, exports digital sampled signal,
Digital sampled signal input offset signal of change portion all the way, another railway digital sampled signal is input into variable power amplifier,
Thermal compensation signal calculating part, the digital sample of signal reception power and Analog to Digital Converter section output based on the output of power detection portion
Signal of change thermal compensation signal,
Variable power amplifier, the data signal to Analog to Digital Converter section output carries out power amplification, and utilizes compensation signal control
The amplification coefficient of variable power amplifier,
Signal demodulation section, the output signal to digital power amplifier is demodulated, and exports demodulation result.
Further, thermal compensation signal calculating part includes training signal test section, and attenuation rate calculating part and thermal compensation signal are produced
Portion,
Training signal test section, extracts training signal from digital sampled signal, and the binary character according to training signal is obtained
The power output in the signal modulation portion of first communication device is obtained,
Attenuation rate calculating part, receives the power output in the signal modulation portion of the first communication device that training signal test section is obtained,
The performance number of the reception signal that the power output is obtained with power detection portion is compared, and calculates power attenuation rate,
Thermal compensation signal generating unit, the power attenuation rate of receiving attenuation rate calculating part output produces compensation letter according to power attenuation rate
Number.
Further, power attenuation rate can be calculated according to below equation：
D=P1/P2, wherein, P1/ is the power output in the signal modulation portion of first communication device, and P2 is the receiving power of signal.
Further, also including data buffer storage portion, extraction numeral is adopted from the digital sampled signal of Analog to Digital Converter section output
Data division in sample signal is cached, then with the data-signal of pre-determined data rate output caching.
Further, the clock for being produced using clock circuit makes data buffer storage portion and thermal compensation signal calculating part synchronization, compensates
Signal of change portion is based on the thermal compensation signal that each training signal calculates the subsequent period signal for the output of data buffer storage portion, in real time
The amplification coefficient of variable power amplifier is adjusted, the subsequent period corresponds to Ns sending signal cycle.
According to another aspect of the present invention, there is provided a kind of optical fiber telecommunications system, including above-mentioned optical signal sends dress
Put with above-mentioned light signal receiving, between optical signal transmitter and light signal receiving with optical fiber interconnect.
By the invention it is possible to realize the conversion between radiofrequency signal and photosignal, support will be with radio frequency by optical fiber
The signal that mode is received is sent to receiving terminal.Additionally, by inserting training signal in sending signal, can be accurate in receiving terminal
Loss is estimated on ground, so as to realize the signal compensation of self adaptation in receiving terminal, reduces power consumption, and improves Receiver Precision,
Simplify system architecture.
Brief description of the drawings
Fig. 1 shows first communication device of the invention.
Fig. 2 show the present invention training signal and sending signal are carried out in signal multiplexing portion it is time-multiplexed after synthesis letter
Number example.
Fig. 3 shows secondary communication device of the invention.
Fig. 4 shows thermal compensation signal calculating part of the invention.
Fig. 5 shows optical fiber telecommunications system of the invention.
Specific embodiment
Accompanying drawing below will be referred and synthesized and the present invention will be described in detail in conjunction with the embodiments.
Embodiment：Fig. 5 shows optical fiber telecommunications system of the invention, including the first communication device that is interconnected by optical fiber and
Secondary communication device.First communication device be applied to radiofrequency signal is wirelessly received with 3GPP or CDMA2000 technical standards, and
Using optical fiber by data signal transmission to be sent to secondary communication device.Secondary communication device can enter to the signal for receiving
Row demodulation, restores data-signal, so as to carry out subsequent treatment.
Fig. 1 shows first communication device of the invention, including rf signal reception portion 100, sending signal modulation portion
101, training signal generating unit 104, training signal assignment portion 105, signal multiplexing portion 102 and electro-optic conversion portion 103.
Rf signal reception portion, radiofrequency signal is received through antenna, radiofrequency signal is demodulated into baseband signal, by baseband signal
Decoding, obtains binary data signal.
Signal modulation portion, is modulated to binary data signal, exports sending signal.Modulation system can be BPSK
（Binary phase shift keying）Modulation, QPSK（QPSK）Modulation, QAM（Quadrature amplitude modulation）Deng however, it can be
Modulation system beyond it.
Training signal generating unit, generates binary system training signal.
Training signal assignment portion, the training signal that the power output based on signal modulation portion is exported to training signal generating unit
In binary character assignment, that is to say, that binary character in training signal characterizes the power output in signal modulation portion, defeated
The training signal gone out after assignment.
Signal multiplexing portion, the sending signal of the portion's of modulating signals into output and the training signal of training signal assignment portion output are made
It is input, the transmission letter of the training signal insertion signal modulation portion's output for periodically exporting training sequence signal assignment portion
Number, such as per Ns sending signal cycle（Ns is the integer more than or equal to 1）, output is used as synthesis letter obtained from its result
Number.That is, signal multiplexing portion sends data-signal and training signal and carry out time-multiplexed according to every Ns, thus, give birth to
Into composite signal.Fig. 2 show in signal multiplexing portion training signal and sending signal are carried out it is time-multiplexed after synthesis letter
Number example.
Using clock circuit（Do not show）The clock of generation makes signal modulation portion, and training signal generating unit and training signal are assigned
Value portion synchronization, so that insertion characterizes training letter per the binary character in the training signal after the Ns assignment of sending signal
The power output of Ns sending signal after number.
Electro-optic conversion portion, the composite signal that signal multiplexing portion is exported carries out electro-optic conversion, to optical fiber output as input
Optical signal.
Fig. 3 shows secondary communication device of the invention, including photoelectric conversion part 300, power detection portion 304, band logical filter
Ripple device 301, Analog to Digital Converter section 302, thermal compensation signal calculating part 305, data buffer storage portion 303, variable power amplifier 306, signal
Demodulation section 307.
Photoelectric conversion part, electric signal is converted to by the optical signal received from optical fiber.
Power detection portion, receives the electric signal of photoelectric conversion part output, calculates the receiving power of signal.
Bandpass filter, receives the electric signal of photoelectric conversion part output, carries out bandpass filtering.
Analog to Digital Converter section, to the filtering signal simulation/digital conversion from bandpass filter, output digital sample letter
Number.Digital sampled signal input offset signal of change portion, another railway digital sampled signal input data buffer unit all the way.
Thermal compensation signal calculating part, the numeral of signal reception power and Analog to Digital Converter section output based on the output of power detection portion
Sampled signal calculates thermal compensation signal.
Fig. 4 shows thermal compensation signal calculating part of the invention, including training signal test section 402, attenuation rate calculating part 400
With thermal compensation signal generating unit 401.
Training signal test section, extracts training signal from digital sampled signal, the binary system symbol according to training signal
Number obtain first communication device signal modulation portion power output.
Attenuation rate calculating part, receives the output work in the signal modulation portion of the first communication device that training signal test section is obtained
Rate, the performance number of the reception signal that the power output is obtained with power detection portion is compared, and calculates power attenuation rate.Power
Attenuation rate can be calculated according to below equation：
D=P1/P2, wherein, P1/ for first communication device signal modulation portion power output, P2It is the receiving power of signal.
Thermal compensation signal generating unit, the power attenuation rate D of receiving attenuation rate calculating part output, produces according to power attenuation rate D
Thermal compensation signal.
Data buffer storage portion, extracts the data portion in digital sampled signal from the digital sampled signal of Analog to Digital Converter section output
Divide and cached, then with the data-signal of pre-determined data rate output caching.
Variable power amplifier, the signal to the output of data buffer unit carries out power amplification, and is produced using thermal compensation signal
The amplification coefficient of the compensation signal control variable power amplifier that portion produces.
Using clock circuit（Do not show）The clock of generation makes data buffer storage portion and thermal compensation signal calculating part synchronization, compensation letter
Number calculating part is based on the thermal compensation signal that each training signal calculates the subsequent period signal for the output of data buffer storage portion, adjusts in real time
Save the amplification coefficient of variable power amplifier.The subsequent period corresponds to Ns sending signal cycle.
Signal demodulation section, the output signal to digital power amplifier is demodulated, and exports demodulation result.
Although in terms of having been described for some in the context of device, it is apparent that these aspects also illustrate that corresponding method
Description, the feature of wherein block or apparatus and method for step or method and step is corresponding.Similarly, in the context of method and step
Described in each side also illustrate that corresponding piece or project or corresponding intrument feature description.Can pass through（Or use）
Hardware unit such as microprocessor, programmable calculator or electronic circuit etc is some or all of in method and step to perform.
Can be performed by such device in most important method and step some or it is multiple.
The realization can using hardware or using software or can using such as floppy disk, DVD, blue light, CD, ROM,
PROM, EPROM, EEPROM's or flash memory etc is situated between with the stored digital for being stored in electronically readable control signal thereon
Matter is performed, and the electronically readable control signal coordinates with programmable computer system（Or can coordinate with it）To cause to perform
Corresponding method.The data medium with electronically readable control signal can be provided, the electronically readable control signal can be with
Programmable computer system coordinates to cause to perform approach described herein.
The realization can also work as computer program product in the form of the computer program product with program code
When running on computers, program code is operated to perform the method.Can in machine-readable carrier storage program generation
Code.
Described above be only it is illustrative, and it is to be understood that it is described herein arrangement and details modification and
Change will be apparent to those skilled in the art.It is therefore intended that only by scope of the following claims rather than by
The specific detail that is presented is limited above description and by way of explaining.
Claims (11)
1. a kind of optical signal transmitter, including：Rf signal reception portion, sending signal modulation portion, training signal generating unit, instruction
Practice signal assignment portion, signal multiplexing portion and electro-optic conversion portion,
Rf signal reception portion, radiofrequency signal is received through antenna, radiofrequency signal is demodulated into baseband signal, by baseband signal solution
Code, obtains binary data signal,
Signal modulation portion, is modulated to binary data signal, exports sending signal,
Training signal generating unit, generates binary system training signal,
Training signal assignment portion, in the training signal that the power output based on signal modulation portion is exported to training signal generating unit
Binary character assignment,
Signal multiplexing portion, the sending signal of the portion's of modulating signals into output and the training signal of training signal assignment portion output are used as defeated
Enter, generate composite signal,
Electro-optic conversion portion, the composite signal that signal multiplexing portion is exported carries out electro-optic conversion as input, believes to optical fiber output light
Number.
2. optical signal transmitter according to claim 1, wherein, the binary character in training signal characterizes signal and adjusts
The power output in portion processed.
3. optical signal transmitter according to claim 1, wherein, signal multiplexing portion is periodically by training sequence signal
The sending signal of training signal insertion signal modulation portion's output of assignment portion output.
4. optical signal transmitter according to claim 3, wherein, signal multiplexing portion is according to every Ns transmission data-signal
With training signal with carry out time-multiplexed, Ns is the integer more than or equal to 1.
5. optical signal transmitter according to claim 4, wherein, the clock produced using clock circuit makes signal modulation
Portion, training signal generating unit and the portion's synchronization of training signal assignment, so that insertion is per the training after the Ns assignment of sending signal
Binary character in signal characterizes the power output of Ns sending signal after the training signal.
6. a kind of light signal receiving, including photoelectric conversion part, power detection portion, bandpass filter, Analog to Digital Converter section, compensation
Signal of change portion, variable power amplifier, signal demodulation section,
Photoelectric conversion part, electric signal is converted to by the optical signal received from optical fiber,
Power detection portion, receives the electric signal of photoelectric conversion part output, calculates the receiving power of signal,
Bandpass filter, receives the electric signal of photoelectric conversion part output, carries out bandpass filtering,
Analog to Digital Converter section, to the filtering signal simulation/digital conversion from bandpass filter, exports digital sampled signal,
Digital sampled signal input offset signal of change portion all the way, another railway digital sampled signal is input into variable power amplifier,
Thermal compensation signal calculating part, the digital sample of signal reception power and Analog to Digital Converter section output based on the output of power detection portion
Signal of change thermal compensation signal,
Variable power amplifier, the data signal to Analog to Digital Converter section output carries out power amplification, and utilizes compensation signal control
The amplification coefficient of variable power amplifier,
Signal demodulation section, the output signal to digital power amplifier is demodulated, and exports demodulation result.
7. light signal receiving according to claim 6, wherein, thermal compensation signal calculating part includes training signal detection
Portion, attenuation rate calculating part and thermal compensation signal generating unit,
Training signal test section, extracts training signal from digital sampled signal, and the binary character according to training signal is obtained
The power output in the signal modulation portion of first communication device is obtained,
Attenuation rate calculating part, receives the power output in the signal modulation portion of the first communication device that training signal test section is obtained,
The performance number of the reception signal that the power output is obtained with power detection portion is compared, and calculates power attenuation rate,
Thermal compensation signal generating unit, the power attenuation rate of receiving attenuation rate calculating part output produces compensation letter according to power attenuation rate
Number.
8. light signal receiving according to claim 7, wherein, power attenuation rate can be calculated according to below equation
Arrive：
D=P1/P2, wherein, P1/ for first communication device signal modulation portion power output, P2It is the receiving power of signal.
9. light signal receiving according to claim 6, also including data buffer storage portion, from the number of Analog to Digital Converter section output
The data division extracted in word sampled signal in digital sampled signal is cached, then with pre-determined data rate output caching
Data-signal.
10. light signal receiving according to claim 9, wherein, the clock produced using clock circuit delays data
Portion and thermal compensation signal calculating part synchronization are deposited, thermal compensation signal calculating part is based on each training signal and calculates for the output of data buffer storage portion
Subsequent period signal thermal compensation signal, the amplification coefficient of real-time regulation variable power amplifier, the subsequent period corresponds to
Ns sending signal cycle.
A kind of 11. optical fiber telecommunications systems, including one of claim 1-5 one of optical signal transmitter and claim 6-10
Light signal receiving, between optical signal transmitter and light signal receiving with optical fiber interconnect.
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| WO2001049001A1 (en) * | 1999-12-24 | 2001-07-05 | Schlumberger Limited | Method and apparatus for transmission of well-bore data on multiple carrier frequencies |
| CN101043221A (en) * | 2006-03-20 | 2007-09-26 | 佛山市顺德区顺达电脑厂有限公司 | Moving transceiver of wireless LAN signal and its receiving method |
| CN103152312A (en) * | 2013-03-26 | 2013-06-12 | 重庆邮电大学 | Power-adjustable partially-superimposed training sequence-based time synchronization system and method for optical orthogonal frequency division multiplexing (OFDM) system |
| CN106063153A (en) * | 2014-03-17 | 2016-10-26 | 日本电信电话株式会社 | Optical-signal transmission device and optical-signal transmission method |
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2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001049001A1 (en) * | 1999-12-24 | 2001-07-05 | Schlumberger Limited | Method and apparatus for transmission of well-bore data on multiple carrier frequencies |
| CN101043221A (en) * | 2006-03-20 | 2007-09-26 | 佛山市顺德区顺达电脑厂有限公司 | Moving transceiver of wireless LAN signal and its receiving method |
| CN103152312A (en) * | 2013-03-26 | 2013-06-12 | 重庆邮电大学 | Power-adjustable partially-superimposed training sequence-based time synchronization system and method for optical orthogonal frequency division multiplexing (OFDM) system |
| CN106063153A (en) * | 2014-03-17 | 2016-10-26 | 日本电信电话株式会社 | Optical-signal transmission device and optical-signal transmission method |
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