CN101594708A - The working method of the comparative optical fiber repeater and the comparative optical fiber repeater - Google Patents

Abstract

The invention introduces a power supply, an antenna feeder system, a wireless receiver, a carrier frequency power amplifier, an optical transmission receiver, an optical transmission transmitter, a programmable frequency converter, a microprocessor, a receiving power divider, and a transmitting power divider The comparative optical fiber repeater working method and comparative optical fiber repeater composed of modules such as sending combiner and microprocessor working software can realize the field strength coverage of multiple optical fiber repeaters and interweave each other deeply, with reliable coverage , the same frequency interference is small, there is no feedback and self-excitation characteristics, and it is suitable for the characteristics of wireless communication relay transmission.

Description

The working method of the comparative optical fiber repeater and the comparative optical fiber repeater

technical field

The invention relates to a wireless communication relay transmission technology, which is suitable for the relay transmission of a wireless communication system and belongs to the technical field of wireless communication.

Background technique

In the currently applied optical fiber wireless relay system, fiber optic direct relay technology is widely used, and its system structure is usually in the form of a near-end machine connected to one or more remote machines through optical fiber lines. The wireless communication relay and forwarding function can be realized between the end machines. The working method is that the near end machine converts the wireless received signal into an optical signal and transmits it to the far end machine through an optical fiber, and then restores it into an electrical signal and sends it out in the same frequency mode. The terminal machine converts the wireless received signal into an optical signal and transmits it to the near-end machine through optical fiber, then restores it to an electrical signal and sends it out in the same frequency mode; the main problem is that for the relay system composed of multiple optical fiber repeaters , when the field strength coverage of adjacent optical fiber repeaters is deeply intertwined with each other, usually more than one optical fiber repeater receives the wireless carrier frequency signal transmitted by the same mobile station. In this case, if the receiver If the optical fiber repeaters that receive the same carrier frequency signal retransmit the received carrier frequency signal, co-channel interference and feedback self-excitation will occur. However, in practical applications, the field strength of the wireless relay system needs to cover each other deeply. interleaving for reliable coverage.

Contents of the invention

In view of the above reasons, the purpose of the present invention is to provide a comparative optical fiber repeater working method and a comparative optical fiber repeater, so that the optical fiber repeater can realize field strength coverage interweaving with each other deeply, with reliable coverage, same-frequency interference Small, self-excited without feedback, suitable for wireless communication relay transmission.

In order to achieve the above object, the present invention introduces a working method of a comparative optical fiber repeater composed of a power supply, an antenna feeder system, a wireless receiver, a carrier frequency power amplifier, an optical transmission receiver, an optical transmission transmitter, and a microprocessor. And the comparative optical fiber repeater, characterized in that the comparative optical fiber repeater works and the comparative optical fiber repeater performs the following working methods:

(1) Measure, encode and store the strength of the wireless carrier frequency signal received by the wireless receiver after frequency conversion filtering, and then encode the strength of the carrier frequency signal, the corresponding time stamp code and the comparative optical fiber repeater The address code is sent to other comparative optical fiber repeaters connected by optical fiber through the optical transmission transmitter;

(2) Store the carrier frequency signal strength code, the corresponding time mark code and the address code of the corresponding comparative optical fiber repeater received by the optical transmission receiver from other comparative optical fiber repeaters, and pass the optical The transmission sender sends the code to other comparative optical fiber repeaters connected by optical fiber;

(3) compare the respective carrier frequency signal strength codes in the same corresponding time mark code segment stored by the comparison type optical fiber repeater, sort the address codes of the comparison type optical fiber repeater by the size of the carrier frequency signal strength;

(4) According to the sorting results of the carrier frequency signal strength, the comparative optical fiber repeater station with the largest receiving carrier frequency signal strength will convert the received carrier frequency signal to the carrier frequency frequency point specified by programming, and convert the frequency after the frequency conversion The carrier frequency signal is transmitted through the carrier frequency power amplifier of the comparative optical fiber repeater, and the frequency-converted carrier frequency signal is also sent to other comparative optical fiber repeaters connected by optical fiber through the optical transmission transmitter;

(5) The comparative optical fiber repeater station that has not received the wireless carrier frequency signal and the strength of the received carrier frequency signal is relatively small passes the carrier frequency signal received by the optical transmission receiver through the carrier frequency power amplifier of the comparative optical fiber repeater station Send it out, and send the carrier frequency signal to other comparative optical fiber repeaters connected by optical fiber through the optical transmission transmitter at the same time.

Working principle of the present invention is:

When the wireless transceiver is wireless carrier frequency signal in the coverage area of the comparative optical fiber repeater, usually one or more comparative optical fiber repeaters receive the carrier frequency signal, and the comparative optical fiber receiving the carrier frequency signal The repeater will measure, encode and store the carrier frequency signal strength after receiving the carrier frequency signal down-converted, and encode the carrier frequency signal strength corresponding to the transmission command code, the corresponding time mark code and the comparison optical fiber repeater The address code of the optical transmission transmitter is sent to other comparative optical fiber repeaters connected by optical fiber; the comparative optical fiber repeater will receive the carrier frequency signal sent by other comparative optical fiber repeaters received by the optical transmission receiver The strength code, the corresponding time mark code and the address code of the corresponding comparative optical fiber repeater are stored, and the code is sent to other comparative optical fiber repeaters connected by optical fiber through the optical transmission transmitter; in this way, each comparative optical fiber The repeaters have obtained the received carrier frequency signal strength codes, the corresponding time stamp code segments and the address codes of the corresponding comparative optical fiber repeaters for each comparative optical fiber repeater; the comparative optical fiber repeater will store each Compare the carrier frequency signal strength codes in the corresponding time mark code segment, that is, do not compare the carrier frequency signal strength codes whose time interval exceeds the code segment, and compare the address codes of the optical fiber repeater according to the carrier frequency signal strength Sorting, according to the sorting results, the comparative optical fiber repeater station with the highest strength of the received carrier frequency signal converts the received carrier frequency signal into another carrier frequency signal through the up-converter and transmits the carrier frequency signal through the carrier frequency power amplifier, And the transmitted carrier frequency signal is sent to other comparative optical fiber repeaters connected by optical fiber through the optical transmission transmitter for forwarding, so as to avoid multiple comparative optical fiber repeaters receiving the same carrier frequency signal The phenomenon of forwarding is also because the carrier frequency signals emitted by all comparative optical fiber repeaters are the same local oscillator source, so co-frequency interference can be avoided. In the process of frequency conversion, the purpose of setting the down converter is to facilitate the reception of carrier frequency signals. The purpose of setting the up-converter is to facilitate the transformation of the original carrier frequency signal into another frequency point carrier frequency signal, so as to avoid the feedback caused by the adjacent comparison optical fiber repeater when receiving and forwarding Self-excited.

Description of drawings

Fig. 1 is a structural diagram of a comparative optical fiber repeater according to an embodiment of the present invention.

Fig. 2 is a flow chart of the working method and main program of the comparative optical fiber repeater according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described below by taking the accompanying drawings as examples.

Fig. 1 shows the composition diagram of the comparison type optical fiber repeater station of an embodiment, wherein:

(1) It is a wireless receiver, which adopts multi-system, multi-band, programmable wireless receiving module with the function of receiving carrier frequency signal test and output, and enters the setting working state under the control of the microprocessor; (2) is the sky The feeder system is composed of antenna, RF feeder, power divider and duplexer; (3) is a carrier frequency power amplifier, which uses a multi-standard, multi-band programmable wireless transmission module, and is controlled and programmed by a microprocessor. Enter the setting working state; A is the transmission controller; (4) is the sending combiner, using the conventional combiner module; (5) is the programmable down-converter, using the programmable local oscillator circuit module and the mixer , filter and other modules, the purpose of setting the down converter is to facilitate the frequency selection reception of the received carrier frequency signal; (6) is the receiving power splitter, using conventional power splitter devices; (7) is the electronic switch, using the working The electronic switching device whose frequency and time constant meet the transmission carrier frequency signal index; (8) is a programmable up-converter, which is composed of a programmable local oscillator circuit module, a mixer, a filter and other modules, and the purpose of setting the up-converter is to It is convenient to convert the original carrier frequency signal into another frequency point carrier frequency signal; (9) is the transmitting power splitter, using conventional power splitter devices; (10) is the carrier frequency signal strength measurement and encoder, using digital-to-analog conversion (11) is a microprocessor, which is composed of a single-chip microcomputer system; (12) is an optical transmission transmitter, which uses a photoelectric converter and a wavelength division The multiplexer is formed, and its optical signal output end is connected with the optical signal input end of the optical transmission receiver of other optical fiber repeaters through an external optical fiber line; (13) is an optical transmission receiver, which adopts photoelectric converter and wave decomposition The multiplexer is composed of an optical signal input end connected to the optical signal output end of the optical transmission transmitter of other optical fiber repeaters through an external optical fiber line, and each electrical signal input and output end of the optical transmission receiver and optical transmission transmitter They are respectively used for receiving and sending carrier frequency signals and digital signals.

Fig. 2 shows the comparative type optical fiber repeater working method and the main program flowchart of an embodiment of the present invention, wherein:

(1) Power-on initialization, parameter setting for each device and programmable module;

(2) Measure, encode and store the strength of the wireless carrier frequency signal received by the wireless receiver after frequency conversion filtering, and then encode the strength of the carrier frequency signal, the corresponding time stamp code and the address of the optical fiber repeater The code is sent to other optical fiber repeaters connected by optical fiber through the optical transmission transmitter;

(3) store the carrier frequency signal strength code, the corresponding time stamp code and the address code of the corresponding optical fiber repeater received by other optical fiber repeaters received by the optical transmission receiver, and send The code is sent to other optical fiber repeaters connected by optical fiber;

(4) compare the respective carrier frequency signal strength codes stored in the same corresponding time mark code segment by the optical fiber repeater, sort the address codes of the optical fiber repeater by the size of the carrier frequency signal strength;

(5) According to the sorting results of the carrier frequency signal strength, the optical fiber repeater station with the largest receiving carrier frequency signal strength will convert the received carrier frequency signal to the carrier frequency frequency point specified by programming, and convert the carrier frequency after the frequency conversion The frequency signal is transmitted through the carrier frequency power amplifier of the optical fiber repeater, and the frequency-converted carrier frequency signal is also sent to other optical fiber repeaters connected by optical fiber through the optical transmission transmitter;

(6) The optical fiber repeater that has not received the wireless carrier frequency signal and the intensity of the received carrier frequency signal is relatively small transmits the carrier frequency signal received by the optical transmission receiver through the carrier frequency power amplifier of the optical fiber repeater, and at the same time The carrier frequency signal is sent to other optical fiber repeaters connected by optical fiber through the optical transmission transmitter.

The implementation of the present invention can be completed by configuring each functional module, components, connecting relevant device modules and writing a working software program and setting working parameters for the microprocessor according to the above description.

The present invention can also be the working method of the comparative optical fiber repeater and the comparative optical fiber repeater according to the sorting result of the address codes of the comparative optical fiber repeater according to the size of the carrier frequency signal strength, to generate the corresponding receiving carrier frequency signal The designated forwarding instruction code of the address code of the comparative optical fiber repeater with the highest strength, and send the designated forwarding instruction code to other comparative optical fiber repeaters connected by optical fiber through the optical transmission transmitter; The comparative optical fiber repeater that specifies the forwarding command code but does not match the address code in the specified forwarding command code sends the specified forwarding command code to other comparative optical fiber repeaters connected through the optical fiber through the optical transmission transmitter, and sends The carrier frequency signal received by the optical transmission receiver is transmitted through the carrier frequency power amplifier of the comparative optical fiber repeater station; the specified forwarding instruction code is received by the optical transmission receiver and compared with the address code in the specified forwarding instruction code The optical fiber repeater converts the received carrier frequency signal to the specified carrier frequency point, and transmits the frequency-converted carrier frequency signal through the carrier frequency power amplifier of the comparative optical fiber repeater, and at the same time the carrier frequency The signal is sent to other comparative optical fiber repeaters connected by optical fiber through the optical transmission transmitter; in this way, the comparison work of the carrier frequency signal strength coding can be completed by a comparative optical fiber repeater and then the comparison optical fiber direct The station designates the comparative optical fiber repeater station that meets the forwarding conditions to forward the received and stored transmission instruction code, which can make the software structure of the present invention relatively simple and easy to implement.

The comparative optical fiber repeater of the present invention has a transmission controller, in which there is a programmable down-converter, a receiving power splitter, a carrier frequency signal strength measurement and encoder, an electronic switch, a Programmable up-converter, a transmitting power splitter, a transmitting combiner, the carrier frequency signal output terminal of the wireless receiver is connected with the carrier frequency signal input terminal of the programmable down-converter, the intermediate frequency signal of the programmable down-converter The output terminal is connected with the input terminal of the receiving power divider, and the output terminal of the receiving power divider is respectively connected with the carrier frequency signal strength measurement and the encoder carrier frequency signal input terminal and a switch node of the electronic switch, and the other of the electronic switch A switch node is connected to the input terminal of the intermediate frequency signal of the programmable up-converter, the output terminal of the carrier frequency signal of the programmable up-converter is connected to the input terminal of the carrier frequency signal of the transmitting power divider, and the carrier frequency signal of the transmitting power divider The output ends are respectively connected to the electrical signal input end of the optical transmission transmitter and one input end of the sending combiner, and the other input end of the sending combiner is connected to the electrical signal output end of the optical transmission receiver, and the sending combiner The output end of the carrier frequency power amplifier is connected with the carrier frequency signal input end of the carrier frequency power amplifier, the carrier frequency signal strength measurement and the encoding output end of the encoder, the programming input end of the programmable down-converter, and the programming input end of the programmable up-converter , an electronic switch working state control terminal, an electrical signal input terminal of the optical transmission receiver and an electrical signal output terminal of the optical transmission receiver are respectively connected with the working signal input and output terminals of the microprocessor; the purpose of setting the down converter is to To facilitate the frequency-selective reception of the received carrier frequency signal, the purpose of setting the up-converter is to facilitate the conversion of the original carrier frequency signal into a carrier frequency signal of another frequency point; in this way, the design purpose of the present invention can be realized, and the specific implementation is shown above described in the examples.

The carrier frequency signal strength measurement and the encoder in the transmission controller of the comparative optical fiber repeater of the present invention are made of an AC-DC converter and a signal encoder, and the signal encoder outputs the DC signal of the AC-DC converter according to its strength. Encoding is carried out, so that the present invention can be implemented conveniently.

The programmable up-converter and the programmable down-converter in the transmission controller of the comparative optical fiber repeater of the present invention are composed of a programmable phase-locked loop circuit, a filter, a voltage-controlled oscillator and a mixer, so that The present invention can be conveniently practiced.

The comparative optical fiber repeater of the present invention can also adopt a plurality of wireless transceivers with different operating frequencies and standards, a plurality of optical transmission transceivers, and a plurality of transmission controllers, so that multiple Relay transmission by wireless communication systems at different frequency points can also enable the optical fiber repeater to connect multiple optical fiber repeaters in different directions through optical fiber lines, which can improve the scope of application of the present invention.

The comparative optical fiber repeater of the present invention can also be a wireless receiver module with the output of the received carrier frequency strength signal, which can make the implementation of the present invention simpler and easier.

The invention introduces a power supply, an antenna feeder system, a wireless receiver, a carrier frequency power amplifier, an optical transmission receiver, an optical transmission transmitter, a programmable frequency converter, a microprocessor, a receiving power divider, and a transmitting power divider The comparative optical fiber repeater working method and comparative optical fiber repeater composed of modules such as sending combiner and microprocessor working software can realize the field strength coverage of multiple optical fiber repeaters and interweave each other deeply, with reliable coverage , the same frequency interference is small, there is no feedback and self-excitation characteristics, and it is suitable for the characteristics of wireless communication relay transmission.

Claims (6)

1, a kind of comparison expression fiber optic repeater working method and comparison expression optical fiber repeater that is made of power supply, antenna-feedback system, wireless receiver, carrier frequency power amplifier device, optical transmission receiver, optical transmission transmitter and microprocessor etc. is characterized in that comparison expression fiber optic repeater working method and comparison expression optical fiber repeater carry out following method of work:

(1) carry out measurement, coding and the storage of intensity size after the radio carrier frequency signal frequency conversion filtering that will receive by wireless receiver, the address code with this CF signal intensity coding, time corresponding identity code and this comparison expression optical fiber repeater sends to other comparison expression optical fiber repeaters that connect by optical fiber by the optical transmission transmitter again;

(2) address code of CF signal intensity coding, time corresponding identity code and the corresponding comparison expression optical fiber repeater that will send by other comparison expression optical fiber repeaters that the optical transmission receiver receives is stored, and this coding is sent to other comparison expression optical fiber repeaters that connect by optical fiber by the optical transmission transmitter;

(3) each the CF signal intensity coding in same corresponding time tag sign indicating number section with comparison expression optical fiber repeater storage compares, and sorts by the size of the CF signal intensity address code to the comparison expression optical fiber repeater;

(4) according to the ranking results of the size of CF signal intensity, the comparison expression optical fiber repeater of the maximum that reception CF signal intensity is is converted to the CF signal that receives the carrier frequency frequency of programming appointment, and the CF signal after this frequency conversion launched by the carrier frequency power amplifier device of this comparison expression optical fiber repeater, also the CF signal after this frequency conversion is sent to other comparison expression optical fiber repeaters that connect by optical fiber by the optical transmission transmitter simultaneously;

(5) do not receive radio carrier frequency signal and receive the less relatively comparison expression optical fiber repeater of CF signal intensity the CF signal that the optical transmission receiver receives is launched by the carrier frequency power amplifier device of this comparison expression optical fiber repeater, simultaneously this CF signal is sent to other comparison expression optical fiber repeaters that connect by optical fiber by the optical transmission transmitter.

2, comparison expression fiber optic repeater working method as claimed in claim 1 and comparison expression optical fiber repeater, it is characterized in that comparison expression fiber optic repeater working method and comparison expression optical fiber repeater are according to by the size of the CF signal intensity ranking results to the address code of comparison expression optical fiber repeater, generation includes the appointment of the address code of the corresponding comparison expression optical fiber repeater that receives CF signal intensity maximum and transmits command code, and sends this appointments forwarding command code by the optical transmission transmitter to other comparison expression optical fiber repeaters that connect by optical fiber; Receive by the optical transmission receiver and specify to transmit command code but transmit the inconsistent comparison expression optical fiber repeater of address code in the command code with specifying, send this appointment by the optical transmission transmitter to other comparison expression optical fiber repeaters that connect by optical fiber and transmit command code, and the CF signal that the optical transmission receiver receives is launched by the carrier frequency power amplifier device of this comparison expression optical fiber repeater; Receive the carrier frequency frequency that the comparison expression optical fiber repeater of specifying the forwarding command code and being consistent with address code in the appointment forwarding command code is converted to the CF signal that receives the programming appointment by the optical transmission receiver, and the CF signal after this frequency conversion launched by the carrier frequency power amplifier device of this comparison expression optical fiber repeater, simultaneously this CF signal is sent to other comparison expression optical fiber repeaters that connect by optical fiber by the optical transmission transmitter.

3, as claim 1,2 described comparison expression fiber optic repeater working method and comparison expression optical fiber repeaters, it is characterized in that the comparison expression optical fiber repeater has a transmission control unit (TCU), a low-converter able to programme is arranged in this transmission control unit (TCU), one receives power splitter, CF signal ionization meter and encoder, an electronic switch, a upconverter able to programme, one sends power splitter, one sends mixer, the CF signal output of wireless receiver is connected with the CF signal input of low-converter able to programme, the intermediate-freuqncy signal output of low-converter able to programme is connected with the input that receives power splitter, the output that receives power splitter is connected with the CF signal input of CF signal ionization meter and encoder and a switching node of electronic switch respectively, another switching node of electronic switch is connected with the signal input end of intermediate frequency of upconverter able to programme, the CF signal output of upconverter able to programme is connected with the CF signal input that sends power splitter, the CF signal output that sends power splitter is connected with the electric signal input end of optical transmission transmitter and an input of transmission mixer respectively, another input that sends mixer is connected with the electrical signal of optical transmission receiver, the output that sends mixer is connected the coding output of CF signal ionization meter and encoder with the CF signal input of carrier frequency power amplifier device, the programming input of low-converter able to programme, the programming input of upconverter able to programme, electronic switch operating state control end, an electric signal input end of optical transmission receiver and an electrical signal of optical transmission receiver are connected with the working signal input/output terminal of microprocessor respectively.

4, comparison expression fiber optic repeater working method as claimed in claim 3 and comparison expression optical fiber repeater, it is characterized in that CF signal ionization meter and encoder in the transmission control unit (TCU) of comparison expression optical fiber repeater are made of AC/DC convertor and signal coder, signal coder is encoded the direct current signal of AC/DC convertor output according to its intensity.

5,, it is characterized in that upconverter able to programme and the low-converter able to programme in the transmission control unit (TCU) of comparison expression optical fiber repeater adopts programmable phase-locked loop circuitry, filter, voltage controlled oscillator and frequency mixer to form as claim 3,4 described comparison expression fiber optic repeater working method and comparison expression optical fiber repeaters.

6,, it is characterized in that in the comparison expression optical fiber repeater, having a plurality of the have radio receiving-transmitting unit of different operating frequency and standard, a plurality of optical transmission transceiver, a plurality of transmission control unit (TCU)s as described comparison expression fiber optic repeater working method of claim 3 to 5 and comparison expression optical fiber repeater.

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