CN101599790A - A kind of intelligent micropower optical fiber wireless covering system - Google Patents
A kind of intelligent micropower optical fiber wireless covering system Download PDFInfo
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Abstract
A kind of intelligent micropower optical fiber wireless covering system, relate to the radio frequency communication devices field, comprise an optical fiber repeater near-end machine and at least one micropower optical fiber repeater remote termination, optical fiber repeater near-end machine all is connected transmission signals by an optical fiber with each micropower optical fiber repeater remote termination, said optical fiber repeater near-end machine comprises that an inactivity intelligence one drags many radio frequencies optical module, and said micropower optical fiber repeater remote termination is a micropower intelligent RF optical module.The present invention is integrated into low noise amplifier module, power amplifier module and antenna in the micropower intelligent RF optical module, and carry out intelligence control, improved integrated level, reduced the cost of intelligent micropower optical fiber wireless covering system, make it have more competitiveness, applicable to mobile communications networks such as GSM, CDMA, 3G, 4G.
Description
Technical field
The present invention relates to the radio frequency communication devices field, a kind of specifically intelligent micropower optical fiber wireless covering system.
Background technology
Existing wireless signal optical fiber covering system is the optical fiber repeater system, its system principle diagram as shown in Figure 1, the concrete course of work is:
Descending: at near-end, the downlink radio-frequency signal of coupler is sent into inactivity radio frequency optical module through duplexer, and inactivity radio frequency optical module converts radiofrequency signal to light signal by built-in laser after Optical Fiber Transmission arrives far-end.At far-end, after inactivity radio frequency optical module receives the light signal of optical fiber transmission, light signal is converted to the signal of telecommunication with built-in PIN light/electric transducer, with the coupling amplifying circuit signal of telecommunication is amplified again, the signal of telecommunication after then will amplifying is sent into power amplifier module and it is carried out processing such as power amplification and filtering, is sent to antenna transmission to carrying out the zone that wireless signal covers through duplexer at last.
Up: at far-end, at first sending into low noise amplifier by the up radiofrequency signal behind antenna and the duplexer amplifies, send into inactivity radio frequency optical module then, inactivity radio frequency optical module converts radiofrequency signal to light signal by built-in laser after Optical Fiber Transmission arrives near-end.At near-end, inactivity radio frequency optical module is converted to the signal of telecommunication with built-in PIN light/electric transducer with light signal, with the coupling amplifying circuit signal of telecommunication is amplified again, and the signal of telecommunication after then will amplifying is sent into duplexer, sends into coupler through after closing the road again.
Low noise amplifier module, power amplifier module and inactivity radio frequency optical module are the vitals that wireless signal optical fiber covering system carries out wireless coverage.As shown in Figure 1, because not integrated low-noise amplifier module, power amplifier module and antenna in the inactivity radio frequency optical module of existing optical fiber repeater system, that is: low noise amplifier module, power amplifier module and antenna are to be provided with separately, not incorporate with inactivity radio frequency optical module, therefore the optical fiber repeater system applies during in engineering, also need added low noise amplifier module, power amplifier module and antenna.Along with the continuous development of inactivity radio frequency optical module, its intelligent and integrated requirement is also more and more stronger, and existing man-to-man communication mode can not satisfy user demand.
Summary of the invention
At the defective that exists in the prior art, the object of the present invention is to provide a kind of intelligent micropower optical fiber wireless covering system, low noise amplifier module, power amplifier module and antenna are integrated in the micropower intelligent RF optical module, and carry out intelligence control, improved integrated level, reduced the cost of intelligent micropower optical fiber wireless covering system, made it have more competitiveness, applicable to mobile communications networks such as GSM, CDMA, 3G, 4G.
For reaching above purpose, the technical scheme that the present invention takes is:
A kind of intelligent micropower optical fiber wireless covering system, it is characterized in that: comprise an optical fiber repeater near-end machine and at least one micropower optical fiber repeater remote termination, optical fiber repeater near-end machine all is connected transmission signals by an optical fiber with each micropower optical fiber repeater remote termination, said optical fiber repeater near-end machine comprises that an inactivity intelligence one drags many radio frequencies optical module, and said micropower optical fiber repeater remote termination is a micropower intelligent RF optical module.
On the basis of technique scheme, said optical fiber repeater near-end machine also comprises monitoring panel, power supply, modulator-demodulator and duplexer, duplexer drags many radio frequencies optical module to be connected signal uplink port and signal downlink port by two radio frequency lines with inactivity intelligence one, and inactivity intelligence one drags many radio frequencies optical module to be provided with the optical fiber interface of some connection far-ends; Monitoring panel, modulator-demodulator and inactivity intelligence one drag many radio frequencies optical module to be connected with power supply by power line; The monitoring panel that is used for the monitor data transmission connects inactivity intelligence one by data wire and drags many radio frequencies optical module and modulator-demodulator.
On the basis of technique scheme, said micropower intelligent RF optical module is provided with the optical fiber interface and an antennal interface that can be connected the antenna of various different polarization that connect near-end.
On the basis of technique scheme, said micropower intelligent RF optical module comprises radio frequency optical module, duplexer, Single-chip Controlling unit, antenna, signal downlink passage and signal uplink passage; The optical interface end of radio frequency optical module receives the descending light signal input and the light signal output of upward signal by wavelength division multiplexing, and duplexer is provided with the antennal interface that fixes up an aerial wire; Said signal downlink passage comprises filter 1, driving amplifier 1, filter 2 and the power amplifier 1 of series connection successively, and the output of radio frequency optical module connects the input of filter 1, and the output of power amplifier 1 connects the input of duplexer; Said signal uplink passage comprises low noise amplifier, filter 3, driving amplifier 2 and the filter 4 of series connection successively, and the input of radio frequency optical module connects the output of filter 4, and the input of low noise amplifier connects the output of duplexer; The Single-chip Controlling unit is connected with radio frequency optical module, driving amplifier 1, driving amplifier 2, power amplifier 1, low noise amplifier respectively by data wire.
On the basis of technique scheme, the model of said radio frequency optical module is SHOST0822S13-I, the model of duplexer is SHDFX0820, the model of Single-chip Controlling unit is C8051F023TQFP64, and the model of filter 1, filter 2 is SHFLT0822D, and the model of filter 3, filter 4 is SHFLT0822U, the model of driving amplifier 1, driving amplifier 2 is MGA53543,, the model of power amplifier 1 is HMC452, the model of low noise amplifier is MGA53543.
On the basis of technique scheme, it is the structure of light path multicast that said inactivity intelligence one is dragged many radio frequencies optical module.
On the basis of technique scheme, said inactivity intelligence one drags many radio frequencies optical module to comprise that a radiofrequency signal is changeed photo-signal channel, the light signal more than two changes radio frequency signal channels, module control unit, radiofrequency signal acquisition channel, laser working condition acquiring circuit and protocol data transmission circuit; Said radiofrequency signal is changeed photo-signal channel and is comprised the input matching unit that receives downlink radio-frequency signal, the output of input matching unit is connected with the drive circuit of laser through behind the filter unit, the drive circuit of laser will be modulated on the laser from the signal that filter unit is sent and convert radiofrequency signal to light signal, and the output of laser outputs to light signal in the optical fiber through the light outgoing interface; Said light signal changes the detector PIN that radio frequency signal channels comprises receiving optical signals, after detector PIN carries out opto-electronic conversion, the signal of telecommunication is sent into microstrip coupler to carry out radio frequency and closes the road multichannel is closed the road through the radiofrequency signal of opto-electronic conversion, the output of microstrip coupler carries out the first order and amplifies through overmatching, LNA unit, signal after the amplification passes through filter unit successively, amplifying unit 1, numerical-control attenuator unit, impedance matching unit, amplifying unit 2 back output radiofrequency signals; Said radiofrequency signal acquisition channel comprises input radio frequency signal sampling channel, output radiofrequency signal acquisition channel, the input radio frequency signal sampling channel comprises a radiofrequency signal power collecting unit that is connected with the output of input matching unit, and this radiofrequency signal power collecting unit is connected with module control unit after changing Unit 4 through A/D; Output radiofrequency signal acquisition channel comprises another radiofrequency signal power collecting unit that is connected with the output of amplifying unit 2, and this radiofrequency signal power collecting unit is connected with module control unit after changing Unit 2 through A/D; Wherein, radiofrequency signal power collecting unit transforms into an aanalogvoltage with radiofrequency signal, and the A/D converting unit transforms into digital signal with this aanalogvoltage again, sends into module control unit then and carries out digital processing; Said laser working condition acquiring circuit comprises that connected luminous power gathers Unit 2 and bias current collecting unit, luminous power is gathered Unit 2 and is changed Unit 3 by A/D and be connected with module control unit, and the bias current collecting unit is connected with module control unit by the A/D converting unit; Luminous power is gathered the operating voltage that Unit 2 obtain laser, and the bias current collecting unit obtains the operating current of laser; Said protocol data transmission circuit comprises the FSK modulator that is connected with module control unit, the FSK modulator is converted into radiofrequency signal with the protocol data of module control unit, the output of FSK modulator is connected through the input of the drive circuit of filter unit and laser, by laser protocol data is sent on the optical fiber and exports; The input of module control unit also receives the protocol data that got off by the fsk demodulator demodulation, and the output of module control unit sends data through an independent filter unit to fsk demodulator; Module control unit carries an external interface that is used to connect network management center.
On the basis of technique scheme, said inactivity intelligence one drags many radio frequencies optical module also to comprise the input optical signal Acquisition Circuit, said input optical signal Acquisition Circuit comprises that the luminous power that is connected with detector PIN gathers Unit 1, and the output that luminous power is gathered Unit 1 is connected with module control unit through A/D converting unit 1.
On the basis of technique scheme, it is MGA53543 that said inactivity intelligence one is dragged the model of the LNA in many radio frequencies optical module, the model of said amplifying unit is HMC452, the model of module control unit is C8051F023TQFP64, the model of numerical-control attenuator is HM274, the model of laser is PT3353, the model of detector PIN is PDCS983, the input coupling, luminous power collecting unit and bias current collecting unit are resistor network, the model of filter unit is HFCN-740, the model of FSK modulator and fsk demodulator is CC1000, and radiofrequency signal power collecting unit is ADM8362.
Intelligent micropower optical fiber wireless covering system of the present invention, low noise amplifier module, power amplifier module and antenna are integrated in the micropower intelligent RF optical module, and carry out intelligence control, improved integrated level, reduced the cost of intelligent micropower optical fiber wireless covering system, make it have more competitiveness, applicable to mobile communications networks such as GSM, CDMA, 3G, 4G.
Description of drawings
The present invention has following accompanying drawing:
The existing optical fiber repeater system principle diagram of Fig. 1
The theory diagram of Fig. 2 micropower intelligence optical fiber covering system
Fig. 3 inactivity intelligence one is dragged many radio frequencies optical module theory diagram
Fig. 4 micropower intelligent RF optical module theory diagram
Fig. 5 power amplifier schematic diagram
Fig. 6 low noise amplifier circuit theory diagrams
Fig. 7 micropower intelligent RF optical module circuit theory diagrams
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 2 is the theory diagram of micropower intelligence optical fiber covering system of the present invention, comprise an optical fiber repeater near-end machine and at least one micropower optical fiber repeater remote termination, optical fiber repeater near-end machine all is connected transmission signals by an optical fiber with each micropower optical fiber repeater remote termination, said optical fiber repeater near-end machine comprises that an inactivity intelligence one drags many radio frequencies optical module, and said micropower optical fiber repeater remote termination is a micropower intelligent RF optical module.On the basis of technique scheme, said optical fiber repeater near-end machine also comprises monitoring panel, power supply, modulator-demodulator and duplexer, duplexer drags many radio frequencies optical module to be connected signal uplink port and signal downlink port by two radio frequency lines with inactivity intelligence one, and inactivity intelligence one drags many radio frequencies optical module to be provided with the optical fiber interface of some connection far-ends; Monitoring panel, modulator-demodulator and inactivity intelligence one drag many radio frequencies optical module to be connected with power supply by power line; The monitoring panel that is used for the monitor data transmission connects inactivity intelligence one by data wire and drags many radio frequencies optical module and modulator-demodulator.On the basis of technique scheme, said micropower intelligent RF optical module is provided with the optical fiber interface and an antennal interface that can be connected the antenna of various different polarization that connect near-end.
On the basis of technique scheme, as shown in Figure 4, said micropower intelligent RF optical module comprises radio frequency optical module, duplexer, Single-chip Controlling unit, antenna, signal downlink passage and signal uplink passage; The optical interface end of radio frequency optical module receives the descending light signal input and the light signal output of upward signal by wavelength division multiplexing, and duplexer is provided with the antennal interface that fixes up an aerial wire; Said signal downlink passage comprises filter 1, driving amplifier 1, filter 2 and the power amplifier 1 of series connection successively, and the output of radio frequency optical module connects the input of filter 1, and the output of power amplifier 1 connects the input of duplexer; Said signal uplink passage comprises low noise amplifier, filter 3, driving amplifier 2 and the filter 4 of series connection successively, and the input of radio frequency optical module connects the output of filter 4, and the input of low noise amplifier connects the output of duplexer; The Single-chip Controlling unit is connected with radio frequency optical module, driving amplifier 1, driving amplifier 2, power amplifier 1, low noise amplifier respectively by data wire.In micropower intelligent RF optical module, comprise the radio frequency optical module that is connected with the light signal port, the antenna that is connected with duplexer and Single-chip Controlling unit, the transmission course of downstream signal is such: downstream signal is sent into driving amplifier 1 from the radio frequency optical module through filter 1, send into power amplifier 1 from driving amplifier 1 through filter 2, send into duplexer at last; The transmission course of upward signal is such: upward signal is sent into filter 3 from duplexer through low noise amplifier, sends into filter 4 from filter 3 through driving amplifier 2, sends into the radio frequency optical module at last.On the basis of technique scheme, the model of said radio frequency optical module is SHOST0822S13-I, the model of duplexer is SHDFX0820, the model of Single-chip Controlling unit is C8051F023TQFP64, the model of filter 1, filter 2 is SHFLT0822D, and the model of filter 3, filter 4 is SHFLT0822U, and the model of driving amplifier 1, driving amplifier 2 is MGA53543, the model of power amplifier 1 is HMC452, and the model of low noise amplifier is MGA53543.In micropower intelligent RF optical module, integrated power amplifier module and antenna have been realized single module wireless shrouding system optical fiber machine, and by the intelligentized control in Single-chip Controlling unit, have following function:
1, function is eliminated in self-excitation automatically, when the equipment of detecting has self-excitation possible, adjusts gain automatically, guarantees no-self excitation.
2, Gain Automatic set-up function detects descending input power automatically, and the automatic setting power output is adjusted descending gain automatically, adjusts up gain according to descending gain automatically.Assurance equipment is operated in optimum Working always.
3, during no user, up shutoff guarantees the base station index not to be exerted an influence.
4, power redundancy, after system finished, it was blind to increase benefit again to system, can adjust the power output of equipment easily, up to satisfying the covering demand.
5, the power output of micro-power radio frequency intelligent RF optical module at 10mW between the 200mW.
On the basis of technique scheme, as shown in Figure 3, it is the structure of light path multicast that said inactivity intelligence one is dragged many radio frequencies optical module.On the basis of technique scheme, said inactivity intelligence one drags many radio frequencies optical module to comprise that a radiofrequency signal is changeed photo-signal channel, the light signal more than two changes radio frequency signal channels, module control unit, radiofrequency signal acquisition channel, laser working condition acquiring circuit and protocol data transmission circuit; Said radiofrequency signal is changeed photo-signal channel and is comprised the input matching unit that receives downlink radio-frequency signal, the output of input matching unit is connected with the drive circuit of laser through behind the filter unit, the drive circuit of laser will be modulated on the laser from the signal that filter unit is sent and convert radiofrequency signal to light signal, and the output of laser outputs to light signal in the optical fiber through the light outgoing interface; Said light signal changes the detector PIN that radio frequency signal channels comprises receiving optical signals, after detector PIN carries out opto-electronic conversion, the signal of telecommunication is sent into microstrip coupler to carry out radio frequency and closes the road multichannel is closed the road through the radiofrequency signal of opto-electronic conversion, the output of microstrip coupler carries out the first order and amplifies through overmatching, LNA unit, signal after the amplification passes through filter unit successively, amplifying unit 1, numerical-control attenuator unit, impedance matching unit, amplifying unit 2 back output radiofrequency signals; Said radiofrequency signal acquisition channel comprises input radio frequency signal sampling channel, output radiofrequency signal acquisition channel, the input radio frequency signal sampling channel comprises a radiofrequency signal power collecting unit that is connected with the output of input matching unit, and this radiofrequency signal power collecting unit is connected with module control unit after changing Unit 4 through A/D; Output radiofrequency signal acquisition channel comprises another radiofrequency signal power collecting unit that is connected with the output of amplifying unit 2, and this radiofrequency signal power collecting unit is connected with module control unit after changing Unit 2 through A/D; Wherein, radiofrequency signal power collecting unit transforms into an aanalogvoltage with radiofrequency signal, and the A/D converting unit transforms into digital signal with this aanalogvoltage again, sends into module control unit then and carries out digital processing; Said laser working condition acquiring circuit comprises that connected luminous power gathers Unit 2 and bias current collecting unit, luminous power is gathered Unit 2 and is changed Unit 3 by A/D and be connected with module control unit, and the bias current collecting unit is connected with module control unit by the A/D converting unit; Luminous power is gathered the operating voltage that Unit 2 obtain laser, and the bias current collecting unit obtains the operating current of laser; Said protocol data transmission circuit comprises the FSK modulator that is connected with module control unit, the FSK modulator is converted into radiofrequency signal with the protocol data of module control unit, the output of FSK modulator is connected through the input of the drive circuit of filter unit and laser, by laser protocol data is sent on the optical fiber and exports; The input of module control unit also receives the protocol data that got off by the fsk demodulator demodulation, and the output of module control unit sends data through an independent filter unit to fsk demodulator; Module control unit carries an external interface that is used to connect network management center.
On the basis of technique scheme, said inactivity intelligence one drags many radio frequencies optical module also to comprise the input optical signal Acquisition Circuit, said input optical signal Acquisition Circuit comprises that the luminous power that is connected with detector PIN gathers Unit 1, and the output that luminous power is gathered Unit 1 is connected with module control unit through A/D converting unit 1.
On the basis of technique scheme, it is MGA53543 that said inactivity intelligence one is dragged the model of the LNA in many radio frequencies optical module, the model of said amplifying unit is HMC452, the model of module control unit is C8051F023TQFP64, the model of numerical-control attenuator is HM274, the model of laser is PT3353, the model of detector PIN is PDCS983, the input coupling, luminous power collecting unit and bias current collecting unit are resistor network, the model of filter unit is HFCN-740, the model of FSK modulator and fsk demodulator is CC1000, and radiofrequency signal power collecting unit is ADM8362.
Dragging in many radio frequencies optical module in inactivity intelligence one, is such for radio frequency to the process of the conversion of light: downlink radio-frequency signal is input to behind the radio frequency optical module " drive circuit " of sending into laser through " input coupling " and " filtering " and is modulated to " laser " and goes up and convert radiofrequency signal to optical signals optical fiber and export; Is such for light to the process of the conversion of radio frequency: light signal carries out opto-electronic conversion after being input to detector " PIN ", utilizing microstrip coupler to carry out radio frequency after converting closes the road multichannel is closed the road through the radiofrequency signal of opto-electronic conversion, pass through " coupling, LNA " then and carry out first order amplification, the signal after the amplification is sent into " filtering ", " amplification ", " numerical-control attenuator ", " impedance matching ", the output of " amplification " back again.Drag in many radio frequencies optical module in inactivity intelligence one, the radiofrequency signal of input is sent into the radiofrequency signal of " A/D conversion 4 ", output and is sent into " A/D conversion 2 " through the radiofrequency signal power collecting through the radiofrequency signal power collecting, wherein, the radiofrequency signal power collecting transforms into an aanalogvoltage with radiofrequency signal, the A/D conversion transforms into digital signal with this aanalogvoltage again, sends into " module control unit " then and carries out digital processing; Send into " A/D conversion " after sending into " A/D conversion 3 ", the collection of operating current process bias current after the operating voltage process luminous power collection 2 of " laser ", obtain the digital signal of operating voltage and operating current, send into " module control unit " then and carry out digital processing; After the protocol data of " module control unit " is sent into " FSK modulator " and is converted into radiofrequency signal, send into " filtering " unit through filtering, " drive circuit " of sending into laser then is modulated to " laser " and upward radiofrequency signal converted to the output of optical signals optical fiber; " module control unit " also carries out protocol processes to the protocol data that gets off through " fsk demodulator " demodulation, and the data that " module control unit " sends to " fsk demodulator " then need through " filtering " unit filtering; " module control unit " carries an external interface that is used to connect network management center.
Fig. 7 is the specific embodiment of micropower intelligent RF optical module circuit theory diagrams.Wherein main components and parts have: numerical-control attenuator HM274 (U6), laser PT3353 (U11), detector PDCS983 (Q1), radio frequency amplifier AM1-SOT89 (U29, U2, U3, U1), and low noise amplifier MGA53543 (U7, U8), module control unit C8051F023TQFP64 (16), duplexer SHDFX0820 (A1), filter SHFLT0822D (F1, F2), filter SHFLT0822U (F3, F4), radio-frequency (RF) power amplification HMC453 (U9).
Because radiofrequency signal has such feature in the middle of transmission: the bottom noise is seen in the upward signal adjustment, and the power amplifier linearity is seen in the downstream signal adjustment, and therefore, the situation that power amplifier is used can influence the quality of this radio signal transmission greatly.Power amplifier design of the present invention is as follows: the noiseproof feature of amplifier fore-end is maximum to the noiseproof feature contribution of whole module, and we have selected the smaller device MGA53543 of noise factor for use in the low noise amplifier major part.Adopt Low-noise Design Technology to comprise low noise pre-amplifier and Linear Power Amplifier, mainly consider under the situation of higher receiving sensitivity, to make signal have better signal to noise ratio.Its distinguishing feature is to adopt the superlinearity power amplifier, and the work of assurance multichannel does not have clutter.Fig. 6 is the low noise amplifier schematic diagram of micropower intelligent RF optical module among the present invention, its circuit connecting relation is as follows: pin 1 ground connection of low noise amplifier, pin 2 connects radiofrequency signal output RFout by an electric capacity, to device power supply+the 5V terminal is connected with the biasing resistor in one 2.2 Europe, the other end of biasing resistor respectively with an inductance, an electric capacity connects, the other end ground connection of electric capacity, the other end of inductance is connected with pin 2, radio-frequency (RF) signal input end RFin carries out radio-frequency (RF) match by a capacitive coupling pin 3 and by an inductance ground connection, pin 4 ground connection.
The feature of low noise amplifier is as follows in the micropower intelligent RF optical module of the present invention:
1. the very high linearity;
2. very low noise factor;
Wherein, the feature of integrated IC MGA53543 is as follows:
1. the very high linearity;
2. very low noise factor;
3. product specification has good consistency;
4. the frequency that can be used for 1.9GHz;
5.OIP3 can reach 39dBm;
6. gain can reach 15.4db;
The modulation system of intelligent micropower optical fiber wireless covering system and the utilance of frequency spectrum have also proposed very high requirement to the linearity of power amplifier, and be all relevant with the performance of Linear Power Amplifier as indexs such as ACPR, IMD3.The power amplifier schematic diagram of the micropower intelligent RF optical module among the present invention as shown in Figure 5, its circuit connecting relation is as follows: the input of power amplifier chip HMC452 is the pin6 pin, input respectively with an end of capacitor C 1, one end of capacitor C 2 connects, the other end of capacitor C 1 respectively with the RFIN terminal, one end of inductance L 2 connects, the other end ground connection of inductance L 2, the other end ground connection of capacitor C 2, the pin3 pin of power amplifier chip HMC452 respectively with an end of capacitor C 3, one end of capacitor C 8, VPD terminal (+5V power supply) connects, the other end ground connection of capacitor C 3, the other end ground connection of capacitor C 8, the output of power amplifier chip HMC452 is pins10,11, output respectively with an end of capacitor C 4, one end of capacitor C 5, one end of capacitor C 6, one end of inductance L 1 connects, the other end ground connection of capacitor C 4, the other end ground connection of capacitor C 5, the other end of capacitor C 6 is connected with the RFOUT terminal, the other end of inductance L 1 respectively with an end of capacitor C 7, one end of capacitor C 9, Vs terminal (signal ground) connects, one end of the other end of capacitor C 7 and resistance R 1 is connected, the other end ground connection of resistance R 1, the other end ground connection of capacitor C 9.
For GSM and cdma network, employing be the duplex mode of FDD, therefore, that signal is divided into is up (from mobile phone to the base station direction) and descending (base station is to the mobile phone direction).From the influence for network, upward signal will enter the base station, if the base station is affected, the user in the base station scope that relates to must be double cautious.All optical fiber machine access base stations all exist data feedback channel, and we wish that the noise power that is linked into the base station receiver inlet is less than-120dBm.This is to be determined jointly by stray radiation level in the work zone of equipment itself and up gain.At first, the stray radiation level in the work zone will meet relevant standard, requires in the band spuiously less than-36dBm as GSM, and CDMA requires in the band spuious less than-22dBm, and we can claim that also this is a static bottom noise.Transfer in the survey in reality, need or have active power amplifier (being generally indoor distributed system) the antenna-feedback system of retransmitting end all inserts, see the bottom noise at alms giver's port of optical fiber machine, the noise of this moment can have the noise (claiming dynamic noise again) in some spaces, and the up bottom noise of optical fiber machine is made of jointly static noise and dynamic noise.Static noise is can be by calculating, and dynamic noise can only obtain by test.Should adjust up gain when transfer surveying and calculate this noise through the noise power that active path loss (different optical fiber computer is different) arrives base station receiver whether be controlled at-120dBm (also can there be requirement in the system that has in addition) in, only control upstream noise, the optical fiber machine just can not form the base station and disturb.
The power that inserts signal and descending gain are depended in the adjustment of downstream signal, and when having only signal when descending input with the gain coupling, just can make the power amplifier output of optical fiber machine is linear signal.Equipment is in manufacturing process, the optical fiber machine equipment can detect the size of third-order intermodulation product according to related standards, stipulated the level of input signal during detection, if in the practical application, input signal amplitude is excessive, and perhaps gain is provided with excessive, the non-linear of signal output caused in the capital, and the output of nonlinear properties will inevitably influence the quality of output signal, thereby causes the quality of mobile phone received signal to descend.Therefore, we are strict with various indexs when design power amplifier and low noise amplifier in the present invention, guarantee the signal communication quality.
Intelligent micropower optical fiber wireless covering system, be that a kind of optical fiber and micropower intelligent RF optical module of using carries out the full fiber optic transmission system that the indoor wireless signal covers, can realize that optical fiber replaces radio frequency cable, finish the covering of indoor wireless signal, and be applicable to mobile communications networks such as GSM, CDMA, 3G, 4G.The present invention has used many technology heights such as radio frequency optical transport technology, the FSK communication technology, radio frequency amplifying technique, main line amplification and compensation technique, rf gain control technology, radio frequency detection technique, temperature detection technology, intelligent control technology, complete agreement control integrated, but cascade, upgradeable covering system have been realized to expand, for the indoor wireless covering system has proposed new solution.Intelligent micropower optical fiber wireless covering system carries the radio-frequency power compensate function by user's control, can realize the accurate compensation of radio-frequency power and optical path loss, and the whole structure that wireless optical fiber indoor covering system signal is covered has clear improvement; The good man-machine interaction function also externally is provided simultaneously, provides communication protocol to handle and Control on Communication, make the user can monitor the operation of whole network from network center to network internal; Control Software adopts the online upgrading technology, can realize the upgrading of software by network management interface under the condition that does not change system hardware, to satisfy the different demands of different user different phase.
Claims (9)
1. intelligent micropower optical fiber wireless covering system, it is characterized in that: comprise an optical fiber repeater near-end machine and at least one micropower optical fiber repeater remote termination, optical fiber repeater near-end machine all is connected transmission signals by an optical fiber with each micropower optical fiber repeater remote termination, said optical fiber repeater near-end machine comprises that an inactivity intelligence one drags many radio frequencies optical module, and said micropower optical fiber repeater remote termination is a micropower intelligent RF optical module.
2. intelligent micropower optical fiber wireless covering system as claimed in claim 1, it is characterized in that: said optical fiber repeater near-end machine also comprises monitoring panel, power supply, modulator-demodulator and duplexer, duplexer drags many radio frequencies optical module to be connected signal uplink port and signal downlink port by two radio frequency lines with inactivity intelligence one, and inactivity intelligence one drags many radio frequencies optical module to be provided with the optical fiber interface of some connection far-ends; Monitoring panel, modulator-demodulator and inactivity intelligence one drag many radio frequencies optical module to be connected with power supply by power line; The monitoring panel that is used for the monitor data transmission connects inactivity intelligence one by data wire and drags many radio frequencies optical module and modulator-demodulator.
3. intelligent micropower optical fiber wireless covering system as claimed in claim 1 is characterized in that: said micropower intelligent RF optical module is provided with the optical fiber interface and an antennal interface that can be connected the antenna of various different polarization that connect near-end.
4. as claim 1 or 2 or 3 described intelligent micropower optical fiber wireless covering systems, it is characterized in that: said micropower intelligent RF optical module comprises radio frequency optical module, duplexer, Single-chip Controlling unit, antenna, signal downlink passage and signal uplink passage; The optical interface end of radio frequency optical module receives the descending light signal input and the light signal output of upward signal by wavelength division multiplexing, and duplexer is provided with the antennal interface that fixes up an aerial wire; Said signal downlink passage comprises filter 1, driving amplifier 1, filter 2 and the power amplifier 1 of series connection successively, and the output of radio frequency optical module connects the input of filter 1, and the output of power amplifier 1 connects the input of duplexer; Said signal uplink passage comprises low noise amplifier, filter 3, driving amplifier 2 and the filter 4 of series connection successively, and the input of radio frequency optical module connects the output of filter 4, and the input of low noise amplifier connects the output of duplexer; The Single-chip Controlling unit is connected with radio frequency optical module, driving amplifier 1, driving amplifier 2, power amplifier 1, low noise amplifier respectively by data wire.
5. intelligent micropower optical fiber wireless covering system as claimed in claim 4, it is characterized in that: the model of said radio frequency optical module is SHOST0822S13-I, the model of duplexer is SHDFX0820, the model of Single-chip Controlling unit is C8051F023TQFP64, the model of filter 1, filter 2 is SHFLT0822D, the model of filter 3, filter 4 is SHFLT0822U, the model of driving amplifier 1, driving amplifier 2 is MGA53543, the model of power amplifier 1 is HMC452, and the model of low noise amplifier is MGA53543.
6. as claim 1 or 2 or 3 described intelligent micropower optical fiber wireless covering systems, it is characterized in that: it is the structure of light path multicast that said inactivity intelligence one is dragged many radio frequencies optical module.
7. intelligent micropower optical fiber wireless covering system as claimed in claim 6 is characterized in that: said inactivity intelligence one drags many radio frequencies optical module to comprise that a radiofrequency signal is changeed photo-signal channel, the light signal more than two changes radio frequency signal channels, module control unit, radiofrequency signal acquisition channel, laser working condition acquiring circuit and protocol data transmission circuit; Said radiofrequency signal is changeed photo-signal channel and is comprised the input matching unit that receives downlink radio-frequency signal, the output of input matching unit is connected with the drive circuit of laser through behind the filter unit, the drive circuit of laser will be modulated on the laser from the signal that filter unit is sent and convert radiofrequency signal to light signal, and the output of laser outputs to light signal in the optical fiber through the light outgoing interface; Said light signal changes the detector PIN that radio frequency signal channels comprises receiving optical signals, after detector PIN carries out opto-electronic conversion, the signal of telecommunication is sent into microstrip coupler to carry out radio frequency and closes the road multichannel is closed the road through the radiofrequency signal of opto-electronic conversion, the output of microstrip coupler carries out the first order and amplifies through overmatching, LNA unit, signal after the amplification passes through filter unit successively, amplifying unit 1, numerical-control attenuator unit, impedance matching unit, amplifying unit 2 back output radiofrequency signals; Said radiofrequency signal acquisition channel comprises input radio frequency signal sampling channel, output radiofrequency signal acquisition channel, the input radio frequency signal sampling channel comprises a radiofrequency signal power collecting unit that is connected with the output of input matching unit, and this radiofrequency signal power collecting unit is connected with module control unit after changing Unit 4 through A/D; Output radiofrequency signal acquisition channel comprises another radiofrequency signal power collecting unit that is connected with the output of amplifying unit 2, and this radiofrequency signal power collecting unit is connected with module control unit after changing Unit 2 through A/D; Wherein, radiofrequency signal power collecting unit transforms into an aanalogvoltage with radiofrequency signal, and the A/D converting unit transforms into digital signal with this aanalogvoltage again, sends into module control unit then and carries out digital processing; Said laser working condition acquiring circuit comprises that connected luminous power gathers Unit 2 and bias current collecting unit, luminous power is gathered Unit 2 and is changed Unit 3 by A/D and be connected with module control unit, and the bias current collecting unit is connected with module control unit by the A/D converting unit; Luminous power is gathered the operating voltage that Unit 2 obtain laser, and the bias current collecting unit obtains the operating current of laser; Said protocol data transmission circuit comprises the FSK modulator that is connected with module control unit, the FSK modulator is converted into radiofrequency signal with the protocol data of module control unit, the output of FSK modulator is connected through the input of the drive circuit of filter unit and laser, by laser protocol data is sent on the optical fiber and exports; The input of module control unit also receives the protocol data that got off by the fsk demodulator demodulation, and the output of module control unit sends data through an independent filter unit to fsk demodulator; Module control unit carries an external interface that is used to connect network management center.
8. intelligent micropower optical fiber wireless covering system as claimed in claim 7, it is characterized in that: said inactivity intelligence one drags many radio frequencies optical module also to comprise the input optical signal Acquisition Circuit, said input optical signal Acquisition Circuit comprises that the luminous power that is connected with detector PIN gathers Unit 1, and the output that luminous power is gathered Unit 1 is connected with module control unit through A/D converting unit 1.
9. as claim 7 or 8 described intelligent micropower optical fiber wireless covering systems, it is characterized in that: it is MGA53543 that said inactivity intelligence one is dragged the model of the LNA in many radio frequencies optical module, the model of said amplifying unit is HMC452, the model of module control unit is C8051F023TQFP64, the model of numerical-control attenuator is HM274, the model of laser is PT3353, the model of detector PIN is PDCS983, the input coupling, luminous power collecting unit and bias current collecting unit are resistor network, the model of filter unit is HFCN-740, the model of FSK modulator and fsk demodulator is CC1000, and radiofrequency signal power collecting unit is ADM8362.
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