CN101340245A - Receiver of multiple code patterns - Google Patents
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- CN101340245A CN101340245A CNA2008100416685A CN200810041668A CN101340245A CN 101340245 A CN101340245 A CN 101340245A CN A2008100416685 A CNA2008100416685 A CN A2008100416685A CN 200810041668 A CN200810041668 A CN 200810041668A CN 101340245 A CN101340245 A CN 101340245A
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Abstract
The invention relates to a multi-code pattern receiver, which can simultaneously receive 2ASK signals and BPSK signals by the code conversion of binary amplitude shift keying 2ASK, the delay interference of binary phase shift keying BPSK signals, and the feedback and/or decoding of received signals. A semiconductor optical amplifier uses the gain saturation characteristic and the self-phase modulation characteristic to convert the 2ASK signals into the BPSK signals; the BPSK signals are still the BPSK signals after passing SOA; then phase information is converted into intensity information by a Mach-Zehnder delay coherent device with the two arms being of 1 bit distance, and the intensity information is detected by a balanced receiver; finally, original signals are restored by the feedback and/or decoding process of an electric field. The multi-code pattern receiver solves the problems of multi-code pattern receiving of 2ASK and BPSK as well as the incoherent reception of the BPSK signals.
Description
Technical field
The present invention relates to a kind of receiver of multiple code patterns, be specifically related to a kind of based semiconductor image intensifer (SOA), Mach-Zehnder postpones relevant device (MZDI), balanced reciver and electrical information are fed back together or the receiver of multiple code patterns of decoding, the problems such as incoherent reception of reception and binary phase shift keying belong to the optical communication technique field when solving binary system amplitude shift keying (2ASK) and two kinds of sign indicating number types of binary phase shift keying (BPSK).
Background technology
Information-intensive society promotes and is stimulating the development of wide bandwidth, long distance, high power capacity light conveying system to the growth of requirement of the global optical-fiber network of big capacity, seamless link.The sign indicating number type of light signal is to the transmission performance important influence of signal, and different sign indicating number types go for different applied environments.The binary system amplitude shift keying is because of its narrow bandwidth, the anti-delay variation performance that cost is low and good and being widely used in the MAN.Binary phase shift keying can suppress nonlinear impairments and amplitude noise well, has compared more performance with amplitude shift keying in high speed, long-distance transmission.Along with the development of future network, in consolidated network, may exist the signal of multiple sign indicating number type modulation, this just needs to receive and dispatch simultaneously the Receiver And Transmitter of a plurality of yards types.And present receiver can only receive at single sign indicating number type, and this just needs the receiver of the multiple sign indicating number of a kind of demodulation simultaneously of exploitation type signal.
Binary system amplitude shift keying signal, claiming the on-off keying signal again, is that the varying strength with light signal comes representative information, and the modulation and demodulation of signal are all simple relatively, received signal only need use up-and electric modular converter detects signal amplitude and gets final product, and is applicable to metropolitan area network and Access Network.The binary phase shift keying signal then is to come representative information with phase place, and the intensity of light signal is constant, because its anti-amplitude noise and nonlinear better performances go for high speed, long-distance transmission.What at present the demodulation of bpsk signal is adopted all is the way of coherent demodulation, comprises the coherent demodulation based on the light phase-locked loop, based on the zero heterodyne demodulation of injection locking laser, based on the zero heterodyne demodulation of stationary adjustable distributed feedback laser etc.Coherent demodulation needs local optical signal and receiving optical signals to mate fully on wavelength, phase place, polarization, demodulation control is complicated, because signal can be subjected to phase noise and birefringent influence in transmission course, the phase place of the light signal that receiving terminal receives and polarization state are extremely unstable, in addition, the wavelength of transmitting terminal laser also can be because of working temperature and ageing equipment and instability, and this can not receive bpsk signal effectively with regard to making coherent demodulation to the BPSK very difficulty that becomes.
Summary of the invention
The objective of the invention is to needs at the deficiencies in the prior art and real system, a kind of receiver of multiple code patterns is proposed, can realize the demodulation of 2ASK and two kinds of signals of BPSK simultaneously and not need extra control, can realize non-coherent demodulation simultaneously bpsk signal.
For realizing this purpose, the present invention is with the phase-shift characterisitc in semiconductor optical amplifier (SOA) saturation condition district, Mach-Zehnder postpones relevant device, balanced reciver and electric logical signal are treated to the basis, by the balance to the delayed interference of the code conversion of 2ASK, bpsk signal, light signal receive and the feedback of received signal with or decoding realize receiving simultaneously the receiver of multiple code patterns of 2ASK signal and bpsk signal.Used semiconductor optical amplifier is the good model of non-linear behaviour, utilize the gain saturation characteristic and from the phase modulated characteristic 2ASK conversion of signals is bpsk signal, and bpsk signal is because its power invariability still is bpsk signal after passing through SOA.The Mach-Zehnder that differs 1 bit distance by two arms postpones relevant device phase information is converted to strength information then, and detects this strength information with balanced reciver, the feedback in last electricity consumption territory with or decoding processing recover primary signal.
The solution of the present invention specifically describes as follows:
The formation of receiver of multiple code patterns of the present invention mainly comprises: semiconductor optical amplifier, Mach-Zehnder postpone relevant device, balanced reciver and electricity and feed back together or decoder module.Described balanced reciver is made up of two photodetectors and an electric subtracter, described electricity feedback with or decoder module by an electricity with or door and one 1 bit delay line form.Semiconductor optical amplifier, Mach-Zehnder postpone to link to each other with optical fiber between relevant device and the balanced reciver, and the feedback in balanced reciver and electric territory links to each other with electric transmission line together or between the decoder module.
Received signal input semiconductor optical amplifier, the amplitude shift keying signal of input is converted to phase shift keyed signal through behind the semiconductor optical amplifier, the phase shift keyed signal of input then remains unchanged, the output of semiconductor optical amplifier and relative delay difference are that the input that the Mach-Zehnder of 1 bit postpones relevant device links to each other, Mach-Zehnder postpones relevant device two outputs, link to each other with two photodetectors of balanced reciver respectively, the output of two photodetectors links to each other with the input of electric subtracter respectively, output and the electricity feedback of electricity subtracter with or decoder module in electricity with or an input of door link to each other, output together electric or door is divided into two-way, one tunnel output links to each other through another input same with electricity behind the 1 bit delay line or door, and another road output is the output of receiver.
The flashlight of input is earlier through a semiconductor optical amplifier, this semiconductor optical amplifier should be selected for use non-linear better, the model that saturation power is low, the 2ASK signal is converted to bpsk signal because of saturation gain with from phase modulated therein, and after bpsk signal imports this semiconductor optical amplifier, though phase shift has also taken place, because constant amplitude, the phase shift of all signal experience is identical, so still be bpsk signal.This signal enters the relevant device of Mach-Zehnder delay that the relative delay is 1 bit, phase information is converted to intensity information, detects this strength information by balanced reciver again, owing to passed through delayed interference, this strength information is not a raw information, so need decoding.The process of decoding is fed back together by an electricity or decoder module is finished, electricity feeds back in same or the decoder module, electricity with or the output of door link again after through 1 bit delay line this electricity with or an input of door, realize the output and a back same exclusive disjunction of importing constantly in the previous moment, this process can be recovered source code flow.When with or the initial condition of gate output terminal and import first signal logic of light signal of receiver of multiple code patterns when identical, the output of whole receiver is identical with primary signal, when with or first signal logic of the initial condition of gate output terminal and input receiver of multiple code patterns light signal when opposite, it is non-that the output of whole receiver is that primary signal is got.
Compare with prior art, the present invention has many-sided superiority.The present invention realizes code conversion from 2ASK to BPSK by semiconductor optical amplifier, again by delayed interference, differential received and feedback with or decoding realize receiving simultaneously the receiver of multiple code patterns of 2ASK signal and bpsk signal.Receiver of multiple code patterns of the present invention has the device of composition technology maturation, benefits advantages such as integrated.The non-coherent demodulation of bpsk signal has been simplified greatly the reception of bpsk signal.
Description of drawings
Fig. 1 is the structure chart of receiver of multiple code patterns of the present invention.
Embodiment
In order to understand technical scheme of the present invention better, execution mode is further described below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of receiver of multiple code patterns of the present invention.Receiver of multiple code patterns is postponed to be concerned with by semiconductor optical amplifier, Mach-Zehnder, and device, balanced reciver and electricity feed back together or decoder module constitutes, described balanced reciver is made up of two photodetectors and an electric subtracter, described electricity feedback with or decoder module by an electricity with or door and one 1 bit delay line form.Semiconductor optical amplifier links to each other with optical fiber between relevant device of Mach-Zehnder delay and the balanced reciver, and balanced reciver and electricity feedback link to each other with electric transmission line together or between the decoder module.
Received signal input semiconductor optical amplifier, the amplitude shift keying signal of input is converted to phase shift keyed signal through behind the semiconductor optical amplifier, the phase shift keyed signal of input then remains unchanged, the output of semiconductor optical amplifier and relative delay difference are that the input that the Mach-Zehnder of 1 bit postpones relevant device (MZDI) links to each other, Mach-Zehnder postpones relevant device two outputs, link to each other with two photodetectors of balanced reciver respectively, the output of two photodetectors links to each other with the input of electric subtracter respectively, output and the electricity feedback of electricity subtracter with or decoder module in electricity with or an input of door link to each other, output together electric or door is divided into two-way, one tunnel output links to each other through another input same with electricity behind the 1 bit delay line or door, and another road output is the output of receiver.
Receiving end signal light injects a semiconductor optical amplifier earlier, this semiconductor optical amplifier should be selected for use non-linear better, the model that saturation power is low, the 2ASK signal is converted to bpsk signal because of saturation gain with from phase modulated therein, the power of input 2ASK signal and extinction ratio all can influence the bpsk signal after the conversion, need suitably debug during practical application.After bpsk signal was imported this semiconductor optical amplifier, though phase shift has also taken place, because constant amplitude, the phase shift of all signal experience was identical, so still be bpsk signal.It is that the Mach-Zehnder of 1 bit postpones relevant device that this signal enters the relative delay, by long and destructive interference mutually phase information is converted to intensity information, detects this strength information by balanced reciver again.Balanced reciver comprises two photodetectors and an electric subtracter, and the signal of telecommunication that photodetector is surveyed is exported behind subtraction.Owing to passed through delayed interference, this strength information is not a raw information, so need decoding.Decode procedure is fed back together by electricity or module is finished, and realizes the output and a back same exclusive disjunction of importing constantly in the previous moment, recovers source code flow.When with or ren of gate output terminal beginning state and import first signal logic of light signal of receiver of multiple code patterns when identical, the output of whole receiver is identical with primary signal, when with or first signal logic of ren of gate output terminal beginning state and input receiver of multiple code patterns light signal when opposite, it is non-that the output of whole receiver is that primary signal is got.
Claims (1)
1, a kind of receiver of multiple code patterns, it is characterized in that: being postponed to be concerned with by semiconductor optical amplifier, Mach-Zehnder, device, balanced reciver and electricity feed back together or decoder module constitutes, described balanced reciver is made up of two photodetectors and an electric subtracter, described electricity feedback with or decoder module by an electricity with or door and one 1 bit delay line form; Received signal input semiconductor optical amplifier, the amplitude shift keying signal of input is converted to phase shift keyed signal through behind the semiconductor optical amplifier, the phase shift keyed signal of input then remains unchanged, the output of semiconductor optical amplifier and relative delay difference are that the input that the Mach-Zehnder of 1 bit postpones relevant device links to each other, Mach-Zehnder postpones relevant device two outputs, link to each other with two photodetectors of balanced reciver respectively, the output of two photodetectors links to each other with the input of electric subtracter respectively, output and the electricity feedback of electricity subtracter with or decoder module in electricity with or an input of door link to each other, output together electric or door is divided into two-way, one tunnel output links to each other through another input same with electricity behind the 1 bit delay line or door, and another road output is the output of receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100416685A CN101340245B (en) | 2008-08-14 | 2008-08-14 | Optical receiver for receiving two patterns of binary system amplitude shift keying and binary system phase shift keying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100416685A CN101340245B (en) | 2008-08-14 | 2008-08-14 | Optical receiver for receiving two patterns of binary system amplitude shift keying and binary system phase shift keying |
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| Publication Number | Publication Date |
|---|---|
| CN101340245A true CN101340245A (en) | 2009-01-07 |
| CN101340245B CN101340245B (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100416685A Expired - Fee Related CN101340245B (en) | 2008-08-14 | 2008-08-14 | Optical receiver for receiving two patterns of binary system amplitude shift keying and binary system phase shift keying |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804315A (en) * | 2021-08-06 | 2021-12-17 | 北京无线电计量测试研究所 | Laser scanning frequency bandwidth calibration device and calibration method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6626589B1 (en) * | 1999-12-29 | 2003-09-30 | Nortel Networks Limited | Optical packet switching |
| US7340168B2 (en) * | 2003-09-29 | 2008-03-04 | Lucent Technologies Inc. | System and method for optically labeled packet transmission |
| CN101136705B (en) * | 2007-10-12 | 2011-09-14 | 清华大学 | Full optical subcarrier demodulator and method of millimeter wave optical fiber radio uplink |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113804315A (en) * | 2021-08-06 | 2021-12-17 | 北京无线电计量测试研究所 | Laser scanning frequency bandwidth calibration device and calibration method |
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| CN101340245B (en) | 2012-03-21 |
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