CN106936512B - 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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- CN106936512B CN106936512B CN201710121216.7A CN201710121216A CN106936512B CN 106936512 B CN106936512 B CN 106936512B CN 201710121216 A CN201710121216 A CN 201710121216A CN 106936512 B CN106936512 B CN 106936512B
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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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- 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 systems, including the first communication device and secondary communication device interconnected by optical fiber.First communication device is suitable for wirelessling receive radiofrequency signal with 3GPP or CDMA2000 technical standard, and utilizes optical fiber by data signal transmission to be sent to secondary communication device.Secondary communication device can demodulate the signal received, restore data-signal, to carry out subsequent processing.
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 technique
Third generation cooperative partner program (3GPP) is the cooperation between each telecommunications industry association group, is intended to define the whole world and is applicable in
The third generation (3G) mobile phone specification.3GPP long term evolution (LTE) is intended to improve Universal Mobile Telecommunications System (UMTS) shifting
The 3GPP project of mobile phone standard.3GPP can define the specification of next generation mobile networks, mobile system and mobile device.
Global system for mobile communications (GSM) specification of the 3GPP specification based on evolution, the latter are commonly referred to as General Mobile electricity
Letter system (UMTS).3GPP standard is construed as each version.Therefore, in Chang Zhiyi version of the discussion of 3GPP or another version
Functionality.For example, version 99 defines the first UMTS third generation (3G) network for being included in CDMA air interface.Version 6 is integrated
Operation with WLAN (LAN) network is simultaneously added to High Speed Uplink Packet access (HUSPA).Version 8 introduces double
Downlink carrier, and dual carrier operation is expanded to the uplink of UMTS by version 9.
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 repaired
Order an edition A and CDMA2000EV-DO revised edition B.1x or 1xRTT refers to core CDMA2000 wireless air interface standard.1x is more
It specifically refers to 1 times of radio transmission techniques and indicates RF bandwidth identical with (RF) bandwidth of radio frequency used in IS-95.
64 additional traffic channels are added to forward link by 1xRTT.EV-DO refers to that evolution data optimizes.EV-DO is for leading to
Cross the telecommunication standard that radio signal carries out the wireless transmission of data.
Summary of the invention
It is an object of that present invention to provide a kind of optical signal transmitter and light signal receiving and optical fiber telecommunications systems.
According to an aspect of the invention, there is provided a kind of optical signal transmitter, comprising: 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, receives radiofrequency signal through antenna, and radiofrequency signal is demodulated into baseband signal, by baseband signal
Decoding obtains binary data signal,
Signal modulation portion, is modulated binary data signal, and output sends signal,
Training signal generating unit generates binary system training signal,
Training signal assignment portion, the training signal that the output power based on signal modulation portion exports training signal generating unit
In binary character assignment,
Signal multiplexing portion, the training signal work for sending signal and the output of training signal assignment portion of the portion's of modulating signals into output
For input, composite signal is generated,
Electro-optic conversion portion, the composite signal that signal multiplexing portion is exported carry out electro-optic conversion, to optical fiber output as input
Optical signal.
Further, the output power in the binary character characterization signal modulation portion in training signal.
Further, training signal of the signal multiplexing portion periodically by the output of training sequence signal assignment portion is inserted into signal
The transmission signal of modulation portion output.
Further, signal multiplexing portion is according to every Ns transmission data-signal and training signal and time-multiplexed, the Ns of progress
For the integer more than or equal to 1.
Further, make signal modulation portion, training signal generating unit and training signal using the clock that clock circuit generates
Assignment portion is synchronous, so that the binary character in the training signal after the assignment for being inserted into every Ns transmission signal be made to characterize the training
The output power of Ns transmission signal after signal.
According to another aspect of the present invention, a kind of light signal receiving, including photoelectric conversion part, power inspection are provided
Survey portion, bandpass filter, Analog to Digital Converter section, thermal compensation signal calculation part, variable power amplifier, signal demodulation section,
Photoelectric conversion part will be converted to electric signal from the received optical signal of optical fiber,
Power detection portion receives the electric signal of photoelectric conversion part output, calculates the reception power of signal,
Bandpass filter receives the electric signal of photoelectric conversion part output, carries out bandpass filtering,
Analog to Digital Converter section carries out analog/digital conversion, output digital sample letter to the filtering signal from bandpass filter
Number, digital sampled signal input offset signal calculation part, another way digital sampled signal input variable power amplifier all the way,
Thermal compensation signal calculation part, the number 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,
Variable power amplifier carries out power amplification to the digital signal of Analog to Digital Converter section output, and utilizes thermal compensation signal
The amplification coefficient of variable power amplifier is controlled,
Signal demodulation section demodulates the output signal of digital power amplifier, exports demodulation result.
Further, thermal compensation signal calculation part includes training signal test section, and attenuation rate calculation part and thermal compensation signal generate
Portion,
Training signal test section, extracts training signal from digital sampled signal, is accorded with according to the binary system of training signal
Number obtain first communication device signal modulation portion output power,
Attenuation rate calculation part receives the output work in the signal modulation portion for the first communication device that training signal test section obtains
The performance number for the reception signal that the output power and power detection portion obtain is compared by rate, calculates power attenuation rate,
Thermal compensation signal generating unit, the power attenuation rate of receiving attenuation rate calculation part output generate benefit according to power attenuation rate
Repay signal.
Further, power attenuation rate can be calculated according to the following formula:
D=P1/P2, wherein P1/ is the output power in the signal modulation portion of first communication device, and P2 is the reception function of signal
Rate.
Further, further include data buffer storage portion, number is extracted from the digital sampled signal that Analog to Digital Converter section exports and is adopted
Data portion in sample signal is cached, then with the data-signal of pre-determined data rate output caching.
Further, keep data buffer storage portion synchronous with thermal compensation signal calculation part using the clock that clock circuit generates, compensate
Signal calculation part calculates the thermal compensation signal of the subsequent period signal for the output of data buffer storage portion based on each training signal, in real time
The amplification coefficient of variable power amplifier is adjusted, the subsequent period corresponds to Ns transmission signal period.
According to another aspect of the present invention, a kind of optical fiber telecommunications system is provided, sends dress including above-mentioned optical signal
Set with above-mentioned light signal receiving, interconnected between optical signal transmitter and light signal receiving with optical fiber.
By the invention it is possible to realize the conversion between radiofrequency signal and photosignal, supporting will be with radio frequency by optical fiber
Mode received signal is sent to receiving end.In addition, by being inserted into training signal in sending signal, it can be accurate in receiving end
Ground estimates that transmission loss reduces power consumption, and improve Receiver Precision to realize adaptive signal compensation in receiving end,
Simplify system structure.
Detailed description of the invention
Fig. 1 shows first communication device of the invention.
Fig. 2 shows the present invention in signal multiplexing portion to training signal and send signal carry out it is time-multiplexed after synthesis believe
Number example.
Fig. 3 shows secondary communication device of the invention.
Fig. 4 shows thermal compensation signal calculation part of the invention.
Fig. 5 shows optical fiber telecommunications system of the invention.
Specific embodiment
Attached drawing will be referred and synthesized below 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 is suitable for wirelessling receive radiofrequency signal with 3GPP or CDMA2000 technical standard, and
Using optical fiber by data signal transmission to be sent to secondary communication device.Secondary communication device can to the signal received into
Row demodulation, restores data-signal, to carry out subsequent processing.
Fig. 1 shows first communication device of the invention, including rf signal reception portion 100, sends 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, receives radiofrequency signal through antenna, and radiofrequency signal is demodulated into baseband signal, by baseband signal
Decoding obtains binary data signal.
Signal modulation portion, is modulated binary data signal, and output sends signal.Modulation system can be BPSK
(binary phase shift keying) modulation, QPSK(quadrature phase shift keying) modulation, QAM(quadrature amplitude modulation) etc., it however, it can be
Modulation system other than it.
Training signal generating unit generates binary system training signal.
Training signal assignment portion, the training signal that the output power based on signal modulation portion exports training signal generating unit
In binary character assignment, that is to say, that in training signal binary character characterization signal modulation portion output power, it is defeated
Training signal after assignment out.
Signal multiplexing portion, the training signal work for sending signal and the output of training signal assignment portion of the portion's of modulating signals into output
For input, periodically the transmission of the training signal insertion signal modulation portion output of training sequence signal assignment portion output is believed
Number, such as every Ns transmission signal period (Ns is the integer more than or equal to 1), output is believed as synthesis obtained from its result
Number.That is, signal multiplexing portion is time-multiplexed according to every Ns transmission data-signal and training signal and progress, give birth to as a result,
At composite signal.Fig. 2 show in signal multiplexing portion to training signal and send signal carry out it is time-multiplexed after synthesis believe
Number example.
Make signal modulation portion using the clock that clock circuit (not shown) generates, training signal generating unit and training signal are assigned
Value portion is synchronous, so that the binary character in the training signal after the assignment for being inserted into every Ns transmission signal be made to characterize training letter
The output power of Ns transmission signal after number.
Electro-optic conversion portion, the composite signal that signal multiplexing portion is exported carry 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
Wave device 301, Analog to Digital Converter section 302, thermal compensation signal calculation part 305, data buffer storage portion 303, variable power amplifier 306, signal
Demodulation section 307.
Photoelectric conversion part will be converted to electric signal from the received optical signal of optical fiber.
Power detection portion receives the electric signal of photoelectric conversion part output, calculates the reception power of signal.
Bandpass filter receives the electric signal of photoelectric conversion part output, carries out bandpass filtering.
Analog to Digital Converter section carries out analog/digital conversion, output digital sample letter to the filtering signal from bandpass filter
Number.Digital sampled signal input offset signal calculation part all the way, another way digital sampled signal input data buffer unit.
Thermal compensation signal calculation part, the number 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 calculation part of the invention, including training signal test section 402, attenuation rate calculation part 400
With thermal compensation signal generating unit 401.
Training signal test section, extracts training signal from digital sampled signal, is accorded with according to the binary system of training signal
Number obtain first communication device signal modulation portion output power.
Attenuation rate calculation part receives the output work in the signal modulation portion for the first communication device that training signal test section obtains
The performance number for the reception signal that the output power and power detection portion obtain is compared by rate, calculates power attenuation rate.Power
Attenuation rate can be calculated according to the following formula:
D=P1/P2, wherein P1/ for first communication device signal modulation portion output power, P2For the reception function of signal
Rate.
Thermal compensation signal generating unit, the power attenuation rate D of receiving attenuation rate calculation part output, generates according to power attenuation rate D
Thermal compensation signal.
Data buffer storage portion, from the data portion extracted in the digital sampled signal that Analog to Digital Converter section exports in digital sampled signal
Divide and cached, then with the data-signal of pre-determined data rate output caching.
Variable power amplifier is carried out power amplification to the signal of data buffer unit output, and is generated using thermal compensation signal
The amplification coefficient for the compensation signal control variable power amplifier that portion generates.
Keep data buffer storage portion synchronous with thermal compensation signal calculation part using the clock that clock circuit (not shown) generates, compensation letter
Number calculation part calculates the thermal compensation signal of the subsequent period signal for the output of data buffer storage portion based on each training signal, adjusts in real time
Save the amplification coefficient of variable power amplifier.The subsequent period corresponds to Ns transmission signal period.
Signal demodulation section demodulates the output signal of digital power amplifier, exports demodulation result.
Although some aspects have been described in the context of device, it is apparent that these aspects also illustrate that corresponding method
Description, wherein block or apparatus and method for step or the feature of method and step are corresponding.Similarly, in the context of method and step
Described in various aspects also illustrate that the description of corresponding piece or project or the feature of corresponding intrument.(or use) can be passed through
As the hardware device of microprocessor, programmable calculator or electronic circuit etc is some or all of in method and step to execute.
Can be executed by such device in most important method and step some or it is multiple.
The realization can using hardware or using software or can be used for example floppy disk, DVD, blue light, CD, ROM,
There is the stored digital for being stored in the control signal of electronically readable thereon to be situated between for PROM, EPROM, EEPROM or flash memory etc
Matter executes, and the electronically readable control signal and programmable computer system cooperation (or can cooperate with it) are so that execute
Corresponding method.The data medium with electronically readable control signal can be provided, electronically readable control signal can be with
Programmable computer system cooperation is so that execute approach described herein.
The realization can also work as computer program product using the form of the computer program product with program code
When running on computers, program code is operated to execute this method.Program generation can be stored in machine-readable carrier
Code.
Described above be only it is illustrative, and it is to be understood that it is described herein arrangement and details modification and
Variation will be apparent to those skilled in the art.It is therefore intended that only by scope of the appended claims rather than by
The specific detail that is presented by way of above description and explanation limits.
Claims (10)
1. a kind of optical signal transmitter, comprising: rf signal reception portion sends signal modulation portion, training signal generating unit, instruction
Practice signal assignment portion, signal multiplexing portion and electro-optic conversion portion,
Rf signal reception portion, receives radiofrequency signal through antenna, and radiofrequency signal is demodulated into baseband signal, by baseband signal solution
Code obtains binary data signal,
Signal modulation portion, is modulated binary data signal, and output sends signal,
Training signal generating unit generates binary system training signal,
Training signal assignment portion, in the training signal that the output power based on signal modulation portion exports training signal generating unit
Binary character assignment,
Signal multiplexing portion, the training signal for sending signal and the output of training signal assignment portion of the portion's of modulating signals into output is as defeated
Enter, generate composite signal,
Electro-optic conversion portion, the composite signal that signal multiplexing portion is exported carry out electro-optic conversion as input, believe to optical fiber output light
Number.
2. optical signal transmitter according to claim 1, wherein the binary character in training signal characterizes signal tune
The output power in portion processed.
3. optical signal transmitter according to claim 1, wherein signal multiplexing portion is periodically by training sequence signal
The transmission signal of the training signal insertion signal modulation portion 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
Time-multiplexed with training signal progress, Ns is the integer more than or equal to 1.
5. optical signal transmitter according to claim 4, wherein make signal modulation using the clock that clock circuit generates
Portion, training signal generating unit is synchronous with training signal assignment portion, to make the training being inserted into after the assignment of every Ns transmission signal
Binary character in signal characterizes the output power of Ns transmission 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 calculation part, variable power amplifier, signal demodulation section,
Photoelectric conversion part will be converted to electric signal from the received optical signal of optical fiber,
Power detection portion receives the electric signal of photoelectric conversion part output, calculates the reception power of signal,
Bandpass filter receives the electric signal of photoelectric conversion part output, carries out bandpass filtering,
Analog to Digital Converter section carries out analog/digital conversion to the filtering signal from bandpass filter, exports digital sampled signal,
Digital sampled signal input offset signal calculation part all the way, another way digital sampled signal input variable power amplifier,
Thermal compensation signal calculation part, the digital sample of signal reception power and Analog to Digital Converter section output based on the output of power detection portion
Signal calculates thermal compensation signal, wherein thermal compensation signal calculation part includes training signal test section, attenuation rate calculation part and thermal compensation signal
Generating unit, training signal test section extract training signal from digital sampled signal, according to the binary character of training signal
The output power in the signal modulation portion of optical signal transmitter is obtained, attenuation rate calculation part receives what training signal test section obtained
The output power in the signal modulation portion of optical signal transmitter, the reception signal that the output power and power detection portion are obtained
Performance number is compared, calculating power attenuation rate, the power attenuation rate of thermal compensation signal generating unit receiving attenuation rate calculation part output,
Thermal compensation signal is generated according to power attenuation rate；
Variable power amplifier carries out power amplification to the digital signal of Analog to Digital Converter section output, and utilizes compensation signal control
The amplification coefficient of variable power amplifier,
Signal demodulation section demodulates the output signal of digital power amplifier, exports demodulation result.
7. light signal receiving according to claim 6, wherein power attenuation rate can calculate according to the following formula
It arrives:
D=P1/P2, wherein P1/ is the output power in the signal modulation portion of optical signal transmitter, and P2 is the reception function of signal
Rate.
8. light signal receiving according to claim 6 further includes data buffer storage portion, the number exported from Analog to Digital Converter section
The data portion extracted in digital sampled signal in word sampled signal is cached, then with pre-determined data rate output caching
The output end of data-signal, data buffer storage portion is connected with variable power amplifier.
9. light signal receiving according to claim 8, wherein make data buffer storage using the clock that clock circuit generates
Portion is synchronous with thermal compensation signal calculation part, and thermal compensation signal calculation part is calculated based on each training signal for the output of data buffer storage portion
The thermal compensation signal of subsequent period signal, adjusts the amplification coefficient of variable power amplifier in real time, and the subsequent period corresponds to Ns
A transmission signal period.
10. a kind of optical fiber telecommunications system, one of optical signal transmitter and claim 6-9 including one of claim 1-5
Light signal receiving, interconnected between optical signal transmitter and light signal receiving with optical fiber.
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| 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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