CN201563127U - FSK communication radio-frequency optical transmission system based on synchronous Manchester encoding - Google Patents
FSK communication radio-frequency optical transmission system based on synchronous Manchester encoding Download PDFInfo
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- CN201563127U CN201563127U CN2009202600194U CN200920260019U CN201563127U CN 201563127 U CN201563127 U CN 201563127U CN 2009202600194 U CN2009202600194 U CN 2009202600194U CN 200920260019 U CN200920260019 U CN 200920260019U CN 201563127 U CN201563127 U CN 201563127U
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Abstract
The utility model discloses an FSK communication radio-frequency optical transmission system based on synchronous Manchester encoding, which comprises a wavelength division multiplexing module used for performing wavelength division multiplexing, a photoelectric detector used for converting an optical signal to an electrical signal, a frequecy-selected filtering module used for frequecy-selected filtering opertion and a transmistion module used for outputing the electrical signal. The system further comprises a control module, an interface module and a modulating/demodulating module, wherein the control module is connected with the modulating/demodulating module through the interface module and used for performing the synchronous Manchester encoding of the modulating/demodulating module. The FSK communication radio-frequency optical transmission system based on synchronous Manchester encoding modulates the signal by means of the synchronous Manchester encoding, performs the frame packing of the data signal, ensures the reliability of data reception and transmission, achieves the temperature compensation of the FSK chip, guarantees good temperature characteristics, and improves the stability of the system.
Description
Technical field
The utility model relates to the photoelectricity transmission field, particularly relates to a kind of FSK communication radio frequency optical transmission system based on synchronous Manchester's code.
Background technology
In the existing radio frequency optical transmission, use asynchronous coding to carry out the signal modulation usually, cause FSK communication error rate height easily, property at high and low temperature is poor; And when data send, need adopt hardware to switch, comparatively loaded down with trivial details; And the output mess code influences system works when no light-receiving.
Summary of the invention
One of the purpose of this utility model improves system reliability for a kind of FSK communication radio frequency optical transmission system based on synchronous Manchester's code is provided.
The utility model proposes a kind of FSK communication radio frequency optical transmission system based on synchronous Manchester's code, comprise the Wavelength division multiplexing module that carries out wavelength division multiplexing, with light signal be converted to the signal of telecommunication photodetector, carry out the frequency-selecting and filtering module of frequency-selective filtering and with the transport module of signal of telecommunication output; Also comprise control module, interface module and modulation module;
Described control module is connected with the modulation module by interface module, and the modulation demodulation module is carried out synchronous Manchester's code modulation.
Preferably, described interface module further comprises:
The control interface unit is connected with described control module and modulation module respectively, carries out the transmission of control signal;
The addressable port unit is connected with described control module and modulation module respectively, carries out synchronous manchester encoded signals transmission.
Preferably, described modulation module is the FSK chip.
Preferably, described control interface unit further comprises:
Pale pin, Clock pin and Data pin.
Preferably, described addressable port unit further comprises:
Clock pin and Data pin.
FSK communication radio frequency optical transmission system based on synchronous Manchester's code described in the utility model, carry out the signal modulation by using synchronous Manchester's code, data-signal is carried out the frame encapsulation, guarantee the reliability of data transmit-receive, and the FSK chip carried out temperature-compensating, ensure good temperature characterisitic, and the stability that has improved system.
Description of drawings
Fig. 1 is the structural representation of the utility model one embodiment based on the FSK communication radio frequency optical transmission system of synchronous Manchester's code;
Fig. 2 is the structural representation of interface module in the utility model one embodiment one execution mode;
Fig. 3 is based on the structural representation of the FSK communication radio frequency optical transmission system of synchronous Manchester's code among another embodiment of the utility model;
Fig. 4 is based on the structural representation of the FSK communication radio frequency optical transmission system of synchronous Manchester's code in another embodiment one execution mode of the utility model.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
With reference to Fig. 1, a kind of FSK communication radio frequency optical transmission system based on synchronous Manchester's code of the utility model one embodiment is proposed, comprise the Wavelength division multiplexing module 11 that carries out wavelength division multiplexing, with light signal be converted to the signal of telecommunication photodetector 12, carry out the frequency-selecting and filtering module 13 of frequency-selective filtering and with the transport module 14 of signal of telecommunication output; Also comprise control module 15, interface module 1320 and modulation module 132;
Described control module 15 is connected with modulation module 132 by interface module 1320, and modulation demodulation module 132 is carried out synchronous Manchester's code modulation.
Above-mentioned Wavelength division multiplexing module 11 (Wavelength Division Multiplexing, wavelength division multiplexing) can receive the laser signal that optical interface 30 imports into, and this laser signal can be carried out wavelength division multiplexing.
Above-mentioned photodetector 12 is connected with this Wavelength division multiplexing module 11, receives the laser signal through wavelength division multiplexing, and is converted to rf signal.
Above-mentioned frequency-selecting and filtering module 13 can be carried out frequency-selecting to the rf signal after above-mentioned photodetector 12 conversions.Above-mentioned frequency-selecting comprises the frequency-selecting of fsk signal and main radiofrequency signal etc.This main radiofrequency signal is the main business signal, such as mobile phone signal etc.
Above-mentioned transport module 14 can receive fsk signal and main radiofrequency signal behind above-mentioned frequency-selecting and filtering module 13 frequency divisions respectively, and respectively with this fsk signal and the above-mentioned FSK communication radio frequency optical transmission system based on synchronous Manchester's code of main radiofrequency signal output.
Above-mentioned control module 15 can be controlled each parts of above-mentioned FSK communication radio frequency optical transmission system based on synchronous Manchester's code, monitoring and signal processing etc.This control module 15 can be single-chip microcomputer.And this control module 15 can be connected with frequency-selecting and filtering module 13, receives fsk signal and handles, and by above-mentioned transport module 14 this fsk signal is exported.
Above-mentioned modulation module 132 is connected with described frequency-selecting and filtering module 13 and control module 15, carries out fsk signal demodulation and modulation.This modulation module 132 is connected with this frequency-selecting and filtering module 13, and the reception fsk signal is demodulated into synchronous Manchester signal and passes to control module 15; And this modulation module 132 is connected with control module 15, accepts the synchronous Manchester's code modulation of this control module 15, data-signal is carried out the frame encapsulation, guarantee the reliability of data transmit-receive, and the FSK chip is carried out temperature-compensating, ensure good temperature characterisitic.
Above-mentioned transport module 14 also comprises RS232/RS485 chip 142, the fsk signal after the demodulation is carried out level conversion after, by monitor-interface 40 output.
Above-mentioned transport module 14 also can carry out the signal of telecommunication by monitor-interface 40 and RS232/RS485 chip 142 and receive, and through the processing of control module 15 (single-chip microcomputer), and after the modulation of FSK chip, utilizes transmitting terminal 20 to send.
The asynchronous serial signal of optical fiber repeater carries out being conveyed in the serial ports of single-chip microcomputer after the level conversion through RS232/RS485 chip 142, single-chip microcomputer carries out frame encapsulation back to data-signal and sends the FSK chip to by synchronous Manchester's code mode, after making the FSK chip that this signal is modulated to the radio frequency FM signal, transmitting terminal 20 carries out the light signal modulation.Change the signal of telecommunication from the fsk signal of the light modulation of optical fiber into through photodetector 12 and import the FSK chip into, the FSK chip is made as digital synchronous Manchester signal with its demodulation and passes to single-chip microcomputer, single-chip microcomputer parses data-signal according to Frame Protocol, and data-signal is undertaken sending to optical fiber repeater after the level translation by RS232/RS485 chip 142.
Above-mentioned interface module 1320 is connected with modulation module 132 and control module 15 respectively, for both provide communication, carries out synchronous Manchester signal transmission etc.
With reference to Fig. 2, in an execution mode of present embodiment, above-mentioned interface module 1320 further comprises control interface unit 1321 and addressable port unit 1322; This control interface unit 1321 is connected with described control module 15 and modulation module 132 respectively, carries out the transmission of control signal; This addressable port unit 1322 is connected with described control module 15 and modulation module 132 respectively, carries out synchronous manchester encoded signals transmission.
Above-mentioned control interface unit 1321 further comprises Pale pin, Clock pin and Data pin; Above-mentioned addressable port unit 1322 further comprises Clock pin and Data pin.
With reference to Fig. 3, a kind of FSK communication radio frequency optical transmission system based on synchronous Manchester's code of another embodiment of the utility model is proposed, above-mentioned transmitting terminal 20 can comprise match circuit 21, frequency-selecting and filtering module 13, APC (Automatic Power Control) module 24 and semiconductor laser 23 (Laser Diode, LD) etc.Above-mentioned match circuit 21 is used for external radio-frequency signal and receives; Above-mentioned frequency-selecting and filtering module 13 can be connected with above-mentioned match circuit 21 and above-mentioned modulation module 132 (FSK chip) respectively, and the signal of telecommunication that receives the transmission of this match circuit 21 and FSK chip respectively carries out frequency-selective filtering; Above-mentioned semiconductor laser 23 can be modulated to the signal of telecommunication behind these frequency-selecting and filtering module 13 frequency-selective filterings laser signal and be issued to exterior light interface 30 by above-mentioned Wavelength division multiplexing module 11.Thus, above-mentioned FSK chip can communicate with the optical fiber repeater monitoring panel, realizes transfer of data.
But above-mentioned APC module 24 noise spectra of semiconductor lasers 23 are carried out the power adjustment, adjust the operating current of semiconductor laser 23 under the different operating condition, make semiconductor laser 23 export stable luminous power.
Said system also can be provided with luminous power acquisition module 25 and AD (Analog Digital, analog/digital) modular converter 26, and described luminous power acquisition module 25 can be connected with described photodetector 12 gathers luminous power; Described AD modular converter 26 can be connected with described luminous power acquisition module 25 and control module 15, receives the luminous power that described luminous power acquisition module 25 is gathered, and carries out sending control module 15 to after AD changes and handles.
Above-mentioned semiconductor laser 23 also is connected with luminous power acquisition module 25, can gather the illuminated message of described semiconductor laser 23, after the conversion through AD modular converter 26, sends control module 15 to and handles.It is to be used for the luminous power of described semiconductor laser 23 is detected.
With reference to Fig. 4, in an execution mode of present embodiment, said system also comprises numerical-control attenuator 131, is connected with above-mentioned frequency-selecting and filtering module 13, receives above-mentioned main radiofrequency signal and carries out exporting by above-mentioned transport module 14 after the gain-adjusted.
This transport module 14 can comprise outlet line 141, this can be carried out the main radiofrequency signal output after the gain-adjusted.This numerical-control attenuator 131 can be controlled by control module 15.
And, also two amplifiers 120 can be set between above-mentioned numerical-control attenuator 131 and above-mentioned outlet line 141, the main radiofrequency signal of exporting is compensated; And in the middle of two amplifiers 120, be provided with impedance matching box 121 and carry out impedance matching.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (5)
1. FSK communication radio frequency optical transmission system based on synchronous Manchester's code, comprise the Wavelength division multiplexing module that carries out wavelength division multiplexing, with light signal be converted to the signal of telecommunication photodetector, carry out the frequency-selecting and filtering module of frequency-selective filtering and with the transport module of signal of telecommunication output; It is characterized in that, also comprise control module, interface module and modulation module;
Described control module is connected with the modulation module by interface module, and the modulation demodulation module is carried out synchronous Manchester's code modulation.
2. the FSK communication radio frequency optical transmission system based on synchronous Manchester's code according to claim 1 is characterized in that described interface module further comprises:
The control interface unit is connected with described control module and modulation module respectively, carries out the transmission of control signal;
The addressable port unit is connected with described control module and modulation module respectively, carries out synchronous manchester encoded signals transmission.
3. the FSK communication radio frequency optical transmission system based on synchronous Manchester's code according to claim 1 and 2 is characterized in that described modulation module is the FSK chip.
4. the FSK communication radio frequency optical transmission system based on synchronous Manchester's code according to claim 2 is characterized in that described control interface unit further comprises:
Pale pin, Clock pin and Data pin.
5. according to claim 2 or 4 described FSK communication radio frequency optical transmission systems, it is characterized in that described addressable port unit further comprises based on synchronous Manchester's code:
Clock pin and Data pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202600194U CN201563127U (en) | 2009-11-02 | 2009-11-02 | FSK communication radio-frequency optical transmission system based on synchronous Manchester encoding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009202600194U CN201563127U (en) | 2009-11-02 | 2009-11-02 | FSK communication radio-frequency optical transmission system based on synchronous Manchester encoding |
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| CN201563127U true CN201563127U (en) | 2010-08-25 |
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| CN2009202600194U Expired - Lifetime CN201563127U (en) | 2009-11-02 | 2009-11-02 | FSK communication radio-frequency optical transmission system based on synchronous Manchester encoding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233991A (en) * | 2018-01-09 | 2018-06-29 | 杭州万高科技股份有限公司 | A kind of DC carrier wave communication system based on RS485 |
| CN111698053A (en) * | 2020-06-16 | 2020-09-22 | 中国科学院国家授时中心 | Optical fiber time frequency transmission system and method using Manchester coding |
-
2009
- 2009-11-02 CN CN2009202600194U patent/CN201563127U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233991A (en) * | 2018-01-09 | 2018-06-29 | 杭州万高科技股份有限公司 | A kind of DC carrier wave communication system based on RS485 |
| CN108233991B (en) * | 2018-01-09 | 2021-09-24 | 杭州万高科技股份有限公司 | RS 485-based direct current carrier communication system |
| CN111698053A (en) * | 2020-06-16 | 2020-09-22 | 中国科学院国家授时中心 | Optical fiber time frequency transmission system and method using Manchester coding |
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Addressee: Hu Haiguo Document name: Notification of Passing Examination on Formalities |
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| CX01 | Expiry of patent term |
Granted publication date: 20100825 |
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