CN104301022A - Microwave communication device based on UHF frequency bands - Google Patents
Microwave communication device based on UHF frequency bands Download PDFInfo
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- CN104301022A CN104301022A CN201410589548.4A CN201410589548A CN104301022A CN 104301022 A CN104301022 A CN 104301022A CN 201410589548 A CN201410589548 A CN 201410589548A CN 104301022 A CN104301022 A CN 104301022A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15535—Control of relay amplifier gain
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
Provided is a microwave communication device based on UHF frequency bands. According to the microwave communication device, uncertainty of link microwave loss is reduced, transmitted power and received power are corrected, the problems of frequency deviation and non-linear distortion caused by adoption of microwave transmission are solved, communication reliability is high, and the coverage area and use intensity of base stations can be effectively enhanced.
Description
Technical field
The present invention relates to field of microwave communication, particularly relate to a kind of microwave communication device based on uhf band.
Background technology
Generally use the trunking that repeater is transmitted as base station signal or mobile terminal signal in mobile communication system.First repeater amplifies the forward communications signal of base station or the reverse link communication signal of mobile terminal, then the reverse or forward communications signal after this amplification is forwarded, can, with the enhancing of relatively low cost realization to base station functions, make the coverage of mobile communication signal be further enhanced.
Repeater transceiver is generally made up of base station end (near-end) duplexer, forward direction amplification module, reverse amplification module and mobile terminal (far-end) duplexer.Wherein, form forward link by near-end duplexer, forward direction amplification module, far-end duplexer successively, and form reverse link by far-end duplexer, reverse amplification module, near-end duplexer successively.
Repeater functionally can be separated into relay and capped end, and both are arranged near base station end and Mobile Terminal respectively.Relay and capped end comprise substantially identical communication component, and both certain node places mainly in reverse link and forward link are separated, and keep electrical connection between the two, are just functionally separated into relay and capped end two parts.Like this, relay is close to base station end, and capped end is close to travelling carriage, thus is more conducive to the effect playing repeater.
Generally, the electric connection between the relay of repeater and capped end realizes by various ways, as by realizations such as optical fiber, netting twine, coaxial lines.But there are the drawbacks such as equipment cost is high, engineering construction is complicated the repeater of these types, and be entity medium due to what adopt, the reliability effect of answering this transmission link to work to repeater is very large.Especially, when optical fiber, netting twine, coaxial line etc. break down, repeater complete machine directly can be caused to break down, thus affect the normal operation of communication system.Therefore at difficult wiring, communication reliability, traditional entity transmission medium repeater requires that the application scenarios such as high, rapid Cover are difficult to applicable requirement.
Improve as one, recent industry adopts microwave relay converting means as the microwave relay system of transmission medium, to guarantee the coverage distance effectively strengthening base station, does not affect the normal work of base station simultaneously.
But the subject matter that the microwave relay system based on the realization of microwave relay converting means faces is as follows:
1, because microwave signal loss is comparatively large by the impact of external environment such as mist, rain, snow and natural objects etc. in free space transmission process, therefore microwave link loss has very large uncertainty.
2, when the transmission medium adopting microwave signal as signal relaying, because microwave signal uses microwave frequency band, therefore need signal of communication to be modulated on microwave frequency band, need the microwave signal received to downconvert to original communication signal frequency band simultaneously.In frequency conversion process, larger frequency error will be brought.When frequency error exceedes to a certain degree, distorted signals will be caused and cannot proper communication.
3, because microwave unit adopts intermediate-frequency band to run, therefore need to carry out communication radio frequency signal in based on the microwave communication device of uhf band and move to the twice frequency of communication radio frequency signal to intermediate-freuqncy signal and intermediate-freuqncy signal.In frequency translation process, if unequal based on the local vibration source of the microwave communication device of uhf band, communication radio frequency signal frequency of occurrences error will be caused.
4, the uncertainty of microwave relay Transmit-Receive Unit link load of microwave relay system and the instability of received power level.
5, the operating frequency of digital microwave transceiver is more and more higher, and its passband is more and more wider, in wide frequency ranges like this, device performance difference at different frequencies highlights, make the final power output of transmitter be not easy to control, in different tranmitting frequency situation, transmitting power deviation is very large.
In sum, be necessary to provide a kind of microwave radio relay communication device based on uhf band newly, to overcome the shortcoming of above-mentioned prior art and deficiency.
Summary of the invention
The object of the invention is to be achieved through the following technical solutions.
According to an embodiment of the invention, propose a kind of microwave communication device based on uhf band, comprising:
Information transmission administrative unit, for being responsible for the information interaction between described microwave communication device and microwave relay converting means;
Near-end coupling duplexer, for the intermediate-freuqncy signal source as the microwave relay converting means be connected with described microwave communication device;
Forward-direction filter unit, for carrying out filtering to the forward signal being received from microwave relay converting means;
Fl transmission line loss consumption gain compensation unit, regulates forward link gain for the compensate for reference by regulating local oscillation generating unit to produce, and compensates fl transmission line loss consumption, ensures the stability of the forward communications signal of described microwave communication device;
Forward direction multichannel unit, the forward direction intermediate-freuqncy signal multichannel for being sent here by microwave relay converting means is signal of communication and two pilot signals;
Forward communications signal frequency regulon, for the intermediate-freuqncy signal of microwave relay converting means feed-in and the calibrating frequency local oscillator regulating local oscillation generating unit to produce are carried out mixing, regulates the frequency error that communication radio frequency signal brings through microwave relay converting means;
Forward communications signal upconverting unit, for by the forward direction intermediate-freuqncy signal up-conversion through frequency adjustment to communication frequency;
Power amplifier, for carrying out power amplification to the forward communications signal after up-conversion;
Regulate local oscillation generating unit, pilot signal for utilizing microwave relay R-T unit to send produces local oscillation signal by frequency synthesizer, this local oscillation signal possesses identical frequency deviation with the forward communications signal transmitted through the frequency conversion of microwave relay converting means, and this local oscillation signal also can be used as the reference of intermediate frequency transmission line loss balancing simultaneously;
Clock regulates source, two pilot signals sent for utilizing described microwave communication device produce clock source by frequency synthesizer, this clock source is completely equal with the frequency of near-end clock source, solves the whole frequency error problem strengthening the microwave relay transmission system of base station range;
Far-end coupling duplexer;
Reverse pilot generation unit, for generation of intermediate frequency pilot signal, for microwave relay R-T unit provides the reference realizing the functions such as link load adjustment, the adjustment of microwave relay converting means frequency deviation.
Inverse filter unit, for carrying out filtering to the reverse signal being received from mobile terminal;
Reverse link communication signal down-converter unit, for by filtered reverse link communication signal frequency conversion to the signal of the intermediate-freuqncy signal source frequency of microwave relay converting means;
Low noise amplifier, for amplifying the signal after down-conversion; And
Reverse merge cells, for communication Intermediate Frequency signal and pilot signal are merged, the intermediate frequency input port of feed-in microwave relay converting means.
According to the embodiment of the present invention, the described microwave communication device based on uhf band also comprises received power correcting unit and transmit power correction unit, and described received power correcting unit comprises received power and corrects form generation module, receive channel correction form generation module and received power correction module;
Described received power corrects form generation module and detects voltage according to microwave transmitting and receiving equipment received RF signal level with according to the RSSI that received power exports, and generates received power and corrects form;
Described receive channel corrects form generation module, and to arrange the power output of high-frequency signal source constant, and by adjusting the receive frequency of digital microwave transceiver, when recording each channel receive frequency, corresponding RSSI detects voltage, generates receive channel and corrects form;
Described received power correction module adopts receive channel modification method, and the RSSI in corrected received capability correction form detects magnitude of voltage.
According to the embodiment of the present invention, described transmit power correction unit comprises: comprise microwave signal calibration unit and power monitoring unit, described microwave signal calibration unit comprises the first power demodulator diode, the second power demodulator diode, microwave amplifier and lossy microwave device, be arranged in identical temperature environment by described first power demodulator diode and the second power demodulator diode, described power monitoring unit comprises integral compensation circuit, linear regulation circuit, power control circuit and difference channel;
Described lossy microwave device, microwave amplifier, the first power demodulator diode, differential amplifier circuit, linear regulation circuit are connected successively with integral compensation circuit, and integral compensation circuit is connected with lossy microwave device, lossy microwave device, microwave amplifier, the first power demodulator diode, differential amplifier circuit, linear regulation circuit and integral compensation circuit is made to form a close loop control circuit, described second power demodulator diode is connected with difference channel, and described power control circuit is connected with integral compensation circuit.
According to another embodiment of the present invention, the described microwave communication device based on uhf band also comprises adaptive line compensating unit, transmits the linearly distortion or non-equilibrium that cause for compensated line.
By the microwave communication device based on uhf band of the present invention, reduce the uncertainty of link lossy microwave, achieve the correction to transmitting power and received power, solve the frequency departure problem and nonlinear distortion question that adopt microwave transmission to occur, communication reliability is high, effectively can strengthen coverage and the working strength of base station.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Figure 1 show the microwave relay transmission system structural representation of the strengthened base station range according to embodiment of the present invention;
Figure 2 illustrate the microwave communication device structural representation based on uhf band according to embodiment of the present invention;
Figure 3 show the received power correcting unit structural representation according to embodiment of the present invention;
Fig. 4 illustrate the transmit power correction cellular construction schematic diagram according to embodiment of the present invention;
Fig. 5 illustrate the adaptive line compensating unit structural representation according to embodiment of the present invention;
Figure 6 show the coupling diplexer structure schematic diagram according to embodiment of the present invention;
Figure 7 show the filter cell structural representation according to embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings illustrative embodiments of the present disclosure is described in more detail.Although show illustrative embodiments of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the execution mode of setting forth here.On the contrary, provide these execution modes to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
According to an embodiment of the invention, a kind of microwave relay transmission system 900 strengthening base station range is proposed, as shown in Figure 1, microwave relay R-T unit 100, microwave relay converting means 400 and the microwave communication device 200 based on uhf band is comprised.The described microwave relay transmission system 900 strengthening base station range for effectively strengthening the signal cover of base station 300, in other words, for extending the communication coverage between base station 300 and mobile terminal 700.
The course of work of described microwave relay R-T unit 100 is divided into both direction, and one is reverse, and another is forward direction.Be oppositely the intermediate-freuqncy signal from microwave relay converting means 400 upconverting on the Frequency point of the communication frequency of specifying, amplifying signal simultaneously, then gives base station 300 by amplifying signal by such as antenna for base station 301; Forward direction is that the signal of communication since base station 300 is down-converted on the IF-FRE point of specifying, and is amplified by signal simultaneously, then amplifying signal is transferred to microwave relay converting means 400.In reverse procedure, achieve the automatic gain compensation of microwave link, and in forward process, then achieve the merging of signal of communication and pilot signal.
The course of work of described microwave relay converting means 400 is divided into both direction, and one is reverse, and another is forward direction.Oppositely that the signal of coming from the microwave communication device 200 based on uhf band is upconverted on the microwave frequency point of specifying, amplifying signal simultaneously; Forward direction is that the signal that microwave relay R-T unit 100 is come is down-converted on the IF-FRE point of specifying, and ensures that IF signal levels is in the scope of specifying, and is exported by intermediate-freuqncy signal source simultaneously.
The course of work of the described microwave communication device 200 based on uhf band is divided into both direction, and one is reverse, and another is forward direction.Be oppositely the communication reverse link communication signal frequency conversion received from mobile terminal 700 on the IF-FRE point of specifying, then microwave relay converting means 400 is given in transmission; Forward direction is that the intermediate-freuqncy signal that microwave relay converting means 400 sends over is upconverted on the frequency of communication frequency.In forward direction, achieve the automatic gain compensation of microwave link, correction of frequency errors, and in oppositely, then achieve the merging of signal of communication and a pilot signal.
According to an embodiment of the invention, described microwave relay R-T unit can include, but not limited to duplexer, upconverting unit, down-converter unit, clock unit, and gain adjusting unit.
According to an embodiment of the invention, described microwave relay converting means can comprise, but be not limited to, the duplexer be connected to each other, IF AGC control unit, power amplifier, power controller, low noise amplifier, duplexer, low noise amplifier, power amplifier, direct-flow inverter, IF AGC control unit, frequency mixer and monitor unit.
According to the embodiment of the present invention, propose a kind of microwave communication device based on uhf band through redesigning, as shown in Figure 2, the described microwave communication device based on uhf band comprises:
Information transmission administrative unit, for the information interaction between the responsible microwave communication device 200 based on uhf band and microwave relay converting means 400;
Near-end coupling duplexer, for the intermediate-freuqncy signal source as the microwave relay converting means 400 be connected with the microwave communication device 200 based on uhf band;
Forward-direction filter unit, for carrying out filtering to the forward signal being received from microwave relay converting means;
Fl transmission line loss consumption gain compensation unit, regulates forward link gain for the compensate for reference by regulating local oscillation generating unit to produce, and compensates fl transmission line loss consumption, ensures the stability of the forward communications signal of the microwave communication device 200 based on uhf band;
Forward direction multichannel unit, the forward direction intermediate-freuqncy signal multichannel for being sent here by microwave relay converting means 400 is signal of communication and two pilot signals;
Forward communications signal frequency regulon, for the intermediate-freuqncy signal of microwave relay converting means 400 feed-in and the calibrating frequency local oscillator regulating local oscillation generating unit to produce are carried out mixing, regulate the frequency error that communication radio frequency signal brings through microwave relay converting means 400;
Forward communications signal upconverting unit, for by the forward direction intermediate-freuqncy signal up-conversion through frequency adjustment to communication frequency;
Power amplifier, for carrying out power amplification to the forward communications signal after up-conversion;
Regulate local oscillation generating unit, pilot signal for utilizing microwave relay R-T unit 100 to send produces local oscillation signal by frequency synthesizer, this local oscillation signal possesses identical frequency deviation with the forward communications signal transmitted through microwave relay converting means 400 frequency conversion, and this local oscillation signal also can be used as the reference of intermediate frequency transmission line loss balancing simultaneously;
Clock regulates source, two pilot signals sent for utilizing the microwave communication device 200 based on uhf band produce clock source by frequency synthesizer, this clock source is completely equal with the frequency of near-end clock source, solves the whole frequency error problem strengthening the microwave relay transmission system of base station range;
Far-end coupling duplexer;
Reverse pilot generation unit, for generation of intermediate frequency pilot signal, for microwave relay R-T unit 100 provides the reference realizing the functions such as link load adjustment, the adjustment of microwave relay converting means 400 frequency deviation.
Inverse filter unit, for carrying out filtering to the reverse signal being received from mobile terminal;
Reverse link communication signal down-converter unit, for by filtered reverse link communication signal frequency conversion to the signal of the intermediate-freuqncy signal source frequency of microwave relay converting means;
Low noise amplifier, for amplifying the signal after down-conversion; And
Reverse merge cells, for communication Intermediate Frequency signal and pilot signal are merged, the intermediate frequency input port of feed-in microwave relay converting means 400.
According to the embodiment of the present invention, the described microwave communication device based on uhf band also comprises received power correcting unit and transmit power correction unit, wherein, as shown in Figure 3, described received power correcting unit comprises received power and corrects form generation module, receive channel correction form generation module and received power correction module
First, described received power corrects form generation module and detects voltage according to microwave transmitting and receiving equipment received RF signal level with according to the RSSI that received power exports, and generates received power and corrects form;
Secondly, the power output that described receive channel correction form generation module arranges high-frequency signal source is constant, by adjusting the receive frequency of digital microwave transceiver, when recording each channel receive frequency, corresponding RSSI detects voltage, generates receive channel and corrects form;
Then, described received power correction module adopts receive channel modification method, and the RSSI in corrected received capability correction form detects magnitude of voltage.
Wherein, described received power corrects form generation module and detects voltage according to microwave transmitting and receiving equipment received RF signal level with according to the RSSI that received power exports, and generates received power correction form and specifically comprises:
(1-1) receive frequency arranging digital microwave transceiver is intermediate-frequeney point, and the radio frequency signal frequency arranging high-frequency signal source output is consistent with this receive frequency, and power output is-90dBm;
(1-2) digital microwave transceiver detects received power size, and logical superpotential mode is supplied to received power correcting unit, and generation actual radio frequency received power and the RSSI corresponding with this actual radio frequency received power detect voltage correction data pair;
(1-3) control high-frequency signal source power output and increase 1dB, namely the radio frequency reception power of digital microwave transceiver increases the step value of a setting, and the step value of described setting is the similar step value that can realize identical function such as 1dB, 0.5dB or 0.2dB;
(1-4) RSSI that when received power correcting unit reads this stepping received power again, digital microwave transceiver reports detects voltage, and generating radio frequency reception power increases the RSSI detection voltage correction data pair corresponding with this actual radio frequency received power of the actual radio frequency received power after 1dB;
(1-5) judge whether the radio frequency reception power of digital microwave transceiver reaches-20dBm, if received power is less than-20dBm, then repeated execution of steps (1-3) is to step (1-5), otherwise, perform step (1-6);
(1-6) the actual received power generated in read step (1-2) to step (1-4) and the RSSI corresponding with this actual received power detect the right value of voltage correction data, generate received power checking list.Digital microwave transceiver by this form of inquiry, can obtain its radio frequency reception performance number.
The power output that described receive channel correction form generation module arranges high-frequency signal source is constant, by adjusting the receive frequency of digital microwave transceiver, RSSI corresponding when recording each channel receive frequency detects voltage, generates receive channel and corrects form and specifically comprise:
(2-1) receive frequency arranging digital microwave transceiver is low frequency, and high-frequency signal source power output is set for-50dBm, namely the radio frequency reception power of digital microwave transceiver is that (this level is only example to-50dBm, other similar stepping such as-40dBm ,-45dBm ,-55dBm etc. are also the one in the specific implementation of the method, all in protection scope of the present invention);
(2-2) to read received power be-50dBm and receive frequency, and digital microwave transceiver reports when being low frequency RSSI detects voltage;
(2-3) receive frequency is that (this stepping is only example in stepping from low frequency with 8MHz, other similar stepping such as 5MHz, 10MHz etc. are also the one in the specific implementation of the method, all in protection scope of the present invention) be increased to the high frequency points of equipment;
(2-4) RSSI when recording each step frequency and correspond to this step frequency detects voltage, generates receive channel checking list.
Described received power correction module adopts receive channel modification method, and the RSSI in corrected received capability correction form detects magnitude of voltage and specifically comprises:
(3-1) when arranging in passband receive frequency, digital microwave transceiver channel designator residing for receive frequency reads the magnitude of voltage in receive channel checking list, and compared with channel correction voltage corresponding to the intermediate-frequeney point of receive channel checking list, draw voltage differences;
(3-2) utilize the voltage differences described in step (3-1), and according to receive channel correction algorithm, the RSSI in corrected received capability correction table detects voltage, and the expression formula of described receive channel correction algorithm is as follows:
In formula, V
rSSIrepresent that final revised RSSU detects magnitude of voltage, V
dETOrepresent the power monitoring voltage before revising, V
chrepresent the receive channel correction voltage that in receive channel checking list, current receive frequency is corresponding, V
mrepresent that in receive channel checking list, received power corrects the channel correction voltage corresponding to frequency using intermediate-frequeney point.
As shown in Figure 4, described transmit power correction unit comprises: comprise microwave signal calibration unit and power monitoring unit, described microwave signal calibration unit comprises the first power demodulator diode, the second power demodulator diode, microwave amplifier and lossy microwave device, be arranged in identical temperature environment by described first power demodulator diode and the second power demodulator diode, described power monitoring unit comprises integral compensation circuit, linear regulation circuit, power control circuit and difference channel; Described lossy microwave device, microwave amplifier, the first power demodulator diode, differential amplifier circuit, linear regulation circuit are connected successively with integral compensation circuit, and integral compensation circuit is connected with lossy microwave device, lossy microwave device, microwave amplifier, the first power demodulator diode, differential amplifier circuit, linear regulation circuit and integral compensation circuit is made to form a close loop control circuit, described second power demodulator diode is connected with difference channel, and described power control circuit is connected with integral compensation circuit.
Transmit from described lossy microwave device input, flow through microwave amplifier, and export from the first power demodulator diode, described first power demodulator diode is for detecting the watt level transmitted of transmitting chain and be the first detecting circuit the power transfer transmitted detected, and the first detecting circuit is fed back to difference channel, difference channel gathers the second detecting circuit on the second power demodulator diode, the output voltage of described difference channel is the difference of the first detecting circuit and the second detecting circuit, the output voltage of described difference channel eliminates the impact of temperature on the first detecting circuit on the basis of the first detecting circuit, the output voltage of described difference channel is the final detecting circuit transmitted, described detecting circuit to carry out after Serial regulation with power control circuit acting in conjunction in regulating and controlling integral compensation circuit through linear regulation circuit, described integral compensation circuit output voltage controls lossy microwave device, with the transmit signal power of control inputs microwave amplifier, form the closed-loop control of the power transmitted.
According to another embodiment of the present invention, the described microwave communication device based on uhf band also comprises adaptive line compensating unit, transmits the linearly distortion or non-equilibrium that cause for compensated line; As shown in Figure 5, described adaptive line compensating unit specifically comprises: RF linear test cell, the clipping unit for amplitude limiting processing, the digital predistortion unit for pre-distortion, D/A conversion unit, feedback modulus converting unit, the linear compensation filter unit for linear compensation filtering, the computing unit for adaptive line compensation calculation, for store filter factor memory cell and for generation of upgrading the renewal control unit of triggering command, coupler and the feedback circuit for carrying out frequency-conversion processing to feedback signal.
The signal of described clipping unit to transmission carries out amplitude limiting processing, described digital predistortion unit carries out pre-distortion to the signal after amplitude limit, then output signal is sent to described linear compensation filter unit and carries out linear compensation filtering process by described digital predistortion unit, filtered for linear compensation signal is sent to described D/A conversion unit and carries out digital-to-analogue conversion by described linear compensation filter unit, signal after digital-to-analogue conversion is sent to described RF linear test cell by described D/A conversion unit, this RF linear test cell amplifies the signal received, filtering and remove frequently process, then export power amplifier to amplify, what described coupler was coupled described power amplifier outputs signal to described feedback circuit, the signal of described feedback circuit to coupling carries out down-converted, then be sent to described feedback modulus converting unit and carry out analog-to-digital conversion,
Described computing unit receives the output signal of the signal after pre-distortion and described feedback modulus converting unit, adopts adaptive line backoff algorithm calculating and sending to send result of calculation to described memory cell; Described memory cell is searched according to result of calculation and is obtained linear compensation filter factor; Described renewal control unit sends and upgrades triggering command to described memory cell, described memory cell upgrades described linear compensation filter factor according to the renewal triggering command received, and described linear compensation filter unit reads the linear compensation filter factor after upgrading from described memory cell and carries out linear compensation filtering process.
The corresponding relation of preset normalization slope and linear compensation filter factor in described memory cell.
The process that described computing unit adopts adaptive line backoff algorithm to calculate acquisition linear compensation filter factor comprises:
According to formula
calculate, obtain normalization slope c, the signal amplitude wherein after digital predistortion unit pre-distortion or signal power are a, and the feedback signal amplitude that feedback modulus converting unit exports or feedback signal power are b; Then method that is cumulative or that average is adopted to add up all normalization slope c; Search according in the corresponding relation of statistics normalization slope and linear compensation filter factor in the memory unit again, obtain one group of linear compensation filter factor corresponding with statistics.
Described renewal control unit sends at down link free timeslot or protection time slot and upgrades triggering command to described memory cell.
Described linear compensation filter unit comprises one-level linear compensation filter or the above linear compensation filter of secondary.
According to the preferred embodiment of the present invention, near-end coupling duplexer and the far-end coupling duplexer of the described microwave communication device based on uhf band are all designed to following structure, as shown in Figure 6:
Comprise input port P1, band limit input inductance L 1, band limit middle inductor L2, band limit outputting inductance L3, band limit first multichannel inductance L4, band limit second multichannel inductance L5, band limit input capacitance C1, band limit intermediate capacitance C2, band limit output capacitance C3, band limit first multichannel ground capacity C4, band limit second multichannel ground capacity C5, band limit output port P2, band logical input inductance L 6, the logical middle inductor L7 of band, the logical first multichannel inductance L8 of band, the logical second multichannel inductance L9 of band, the logical input capacitance C6 of band, the logical intermediate capacitance C7 and C10 of band, the logical output capacitance C11 of band, the logical first multichannel electric capacity C8 of band, the logical second multichannel electric capacity C9 of band, the logical output port P3 of band,
Described input port P1 connects input signal and is divided into two-way, one tunnel is connecting band limit input inductance L 1 and band limit input capacitance C1 in turn, band limit middle inductor L2 and band limit intermediate capacitance C2, band limit outputting inductance L3 and band limit output capacitance C3, band limit output port P2, one end of band limit input inductance L 1 is connected with input port P1, band limit input inductance L 1 other end limits one end of middle inductor L2 with band respectively, one end with limit first multichannel inductance L4 connects, the other end of band limit middle inductor L2 limits one end of outputting inductance L3 with band respectively, one end with limit second multichannel inductance L5 connects, the other end of band limit outputting inductance L3 limits output port P2 to be connected with band, the other end with limit first multichannel inductance L4 is connected with one end of band limit first multichannel ground capacity C4, with the other end ground connection of limit first multichannel ground capacity C4, the other end with limit second multichannel inductance L5 is connected with one end of band limit second multichannel ground capacity C5, with the other end ground connection of limit second multichannel ground capacity C5, band limit input capacitance C1 two ends are limit with band and are inputted inductance L 1 two ends and be connected in parallel, band limit intermediate capacitance C2 two ends limit middle inductor L2 two ends to be connected in parallel with band, band limit output capacitance C3 two ends limit outputting inductance L3 two ends to be connected in parallel with band, another road in turn connecting band leads to input capacitance C6, band logical input inductance L 6, the logical middle inductor L7 of band, the logical intermediate capacitance C7 and C10 of band, the logical output capacitance C11 of band, the logical output port P3 of band, one end of the logical input capacitance C6 of band, one end of band logical input inductance L 6 is connected with input port P1, the other end of the logical input capacitance C6 of band, one end of band logical input inductance L 6 is connected with one end of the logical middle inductor L7 of band, the other end of the logical middle inductor L7 of band is connected with one end of the logical intermediate capacitance C7 of band, the other end of the logical intermediate capacitance C7 of band, one end of first multichannel inductance L8 is connected with one end of the logical intermediate capacitance C10 of band, the other end of the logical intermediate capacitance C10 of band leads to one end of the second multichannel inductance L9 with band respectively, one end of the logical output capacitance C11 of band connects, the other end of the logical output capacitance C11 of band is connected with the logical output port P3 of band, the other end of the logical first multichannel inductance L8 of band is connected with one end of the logical first multichannel electric capacity C8 of band, the other end ground connection of the first multichannel electric capacity C8, one end of the logical second multichannel inductance L9 of band is connected with one end of the second multichannel electric capacity C9, the other end ground connection of the second multichannel electric capacity C9.
The coupling duplexer volume of the present invention's design is little, lightweight, reliability is high, excellent electrical property, structure simple, and temperature stability is high, consistency good.
According to the preferred embodiment of the present invention, forward-direction filter unit and the inverse filter unit of the described microwave communication device based on uhf band are all designed to following structure, as shown in Figure 7:
Comprise surface-pasted 50 ohmage input ports (P1), input inductance (L10), first order parallel resonance unit (L1, C1), coupling circuit (L12, C12) between the first order, second level parallel resonance unit (L2, C2), coupling circuit (L23, C23) between the second level, third level parallel resonance unit (L3, C3), coupling circuit (L34, C34) between the third level, fourth stage parallel resonance unit (L4, C4), coupling circuit (L45, C45) between the fourth stage, level V parallel resonance unit (L5, C5), coupling circuit (L56, C56) between level V, 6th grade of parallel resonance unit (L6, C6), 6th interstage coupling circuit (L67, C67), 7th grade of parallel resonance unit (L7, C7), 7th interstage coupling circuit (L78, C78), 8th grade of parallel resonance unit (L8, C8), 8th interstage coupling circuit (L89, C89), 9th grade of parallel resonance unit (L9, C9), outputting inductance (L11), surface-pasted 50 ohmage input port (P2) and earth terminals, one termination input signal of surface-pasted 50 ohmage input ports (P1), one end of another termination input inductance (L10) of input port (P1), one end of the surface-pasted 50 ohmage output ports (P2) of one termination of outputting inductance (L11), signal exports by the other end of surface-pasted 50 ohmage output ports, the other end first order parallel resonance in parallel unit (L1 of the other end of the input port (P1) of surface mount 50 ohmage and the output port (P2) of surface mount 50 ohmage, C1), second level parallel resonance unit (L2, C2), third level parallel resonance unit (L3, C3), fourth stage parallel resonance unit (L4, C4), level V parallel resonance unit (L5, C5), 6th grade of parallel resonance unit (L6, C6), 7th grade of parallel resonance unit (L7, C7), 8th grade of parallel resonance unit (L8, C8), 9th grade of parallel resonance unit (L9, C9), first order parallel resonance unit (L1, and second level parallel resonance unit (L2 C1), C2) connect between coupling circuit (L12 between the first order, C12), second level parallel resonance unit (L2, and third level parallel resonance unit (L3 C2), C3) connect between coupling circuit (L23 between the second level, C23), third level parallel resonance unit (L3, and fourth stage parallel resonance unit (L4 C3), C4) connect between coupling circuit (L34 between the third level, C34), fourth stage parallel resonance unit (L4, and level V parallel resonance unit (L5 C4), C5) connect between coupling circuit (L45 between the fourth stage, C45), level V parallel resonance unit (L5, C5) the and six grade of parallel resonance unit (L6, C6) connect between coupling circuit (L56 between level V, C56), 6th grade of parallel resonance unit (L6, C6) the and seven grade of parallel resonance unit (L7, C7) connect between the 6th interstage coupling circuit (L67, C67), 7th grade of parallel resonance unit (L7, C7) the and eight grade of parallel resonance unit (L8, C8) connect between the 7th interstage coupling circuit (L78, C78), 8th grade of parallel resonance unit (L8, C8) the and nine grade of parallel resonance unit (L9, C9) connect between the 8th interstage coupling circuit (L89, C89), described first order parallel resonance unit (L1, C1), second level parallel resonance unit (L2, C2), third level parallel resonance unit (L3, C3), fourth stage parallel resonance unit (L4, C4), level V parallel resonance unit (L5, C5), the 6th grade of parallel resonance unit (L6, C6), the 7th grade of parallel resonance unit (L7, C7), the 8th grade of parallel resonance unit (L8, C8), the 9th grade of parallel resonance unit (L9, C9) ground connection respectively.
The filter cell passband internal loss of the present invention's design is low, and Out-of-band rejection is high, excellent electrical property, phase-frequency characteristic linear change, and temperature stability is high, can be used for the microwave communication environment of environment critical.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (4)
1., based on a microwave communication device for uhf band, comprising:
Information transmission administrative unit, for being responsible for the information interaction between described microwave communication device and microwave relay converting means;
Near-end coupling duplexer, for the intermediate-freuqncy signal source as the microwave relay converting means be connected with described microwave communication device;
Forward-direction filter unit, for carrying out filtering to the forward signal being received from microwave relay converting means;
Fl transmission line loss consumption gain compensation unit, regulates forward link gain for the compensate for reference by regulating local oscillation generating unit to produce, and compensates fl transmission line loss consumption, ensures the stability of the forward communications signal of described microwave communication device;
Forward direction multichannel unit, the forward direction intermediate-freuqncy signal multichannel for being sent here by microwave relay converting means is signal of communication and two pilot signals;
Forward communications signal frequency regulon, for the intermediate-freuqncy signal of microwave relay converting means feed-in and the calibrating frequency local oscillator regulating local oscillation generating unit to produce are carried out mixing, regulates the frequency error that communication radio frequency signal brings through microwave relay converting means;
Forward communications signal upconverting unit, for by the forward direction intermediate-freuqncy signal up-conversion through frequency adjustment to communication frequency;
Power amplifier, for carrying out power amplification to the forward communications signal after up-conversion;
Regulate local oscillation generating unit, pilot signal for utilizing microwave relay R-T unit to send produces local oscillation signal by frequency synthesizer, this local oscillation signal possesses identical frequency deviation with the forward communications signal transmitted through the frequency conversion of microwave relay converting means, and this local oscillation signal also can be used as the reference of intermediate frequency transmission line loss balancing simultaneously;
Clock regulates source, two pilot signals sent for utilizing described microwave communication device produce clock source by frequency synthesizer, this clock source is completely equal with the frequency of near-end clock source, solves the whole frequency error problem strengthening the microwave relay transmission system of base station range;
Far-end coupling duplexer;
Reverse pilot generation unit, for generation of intermediate frequency pilot signal, for microwave relay R-T unit provides the reference realizing the functions such as link load adjustment, the adjustment of microwave relay converting means frequency deviation.
Inverse filter unit, for carrying out filtering to the reverse signal being received from mobile terminal;
Reverse link communication signal down-converter unit, for by filtered reverse link communication signal frequency conversion to the signal of the intermediate-freuqncy signal source frequency of microwave relay converting means;
Low noise amplifier, for amplifying the signal after down-conversion; And
Reverse merge cells, for communication Intermediate Frequency signal and pilot signal are merged, the intermediate frequency input port of feed-in microwave relay converting means.
2. a device as claimed in claim 1, the described microwave communication device based on uhf band also comprises received power correcting unit and transmit power correction unit, and described received power correcting unit comprises received power and corrects form generation module, receive channel correction form generation module and received power correction module;
Described received power corrects form generation module and detects voltage according to microwave transmitting and receiving equipment received RF signal level with according to the RSSI that received power exports, and generates received power and corrects form;
Described receive channel corrects form generation module, and to arrange the power output of high-frequency signal source constant, and by adjusting the receive frequency of digital microwave transceiver, when recording each channel receive frequency, corresponding RSSI detects voltage, generates receive channel and corrects form;
Described received power correction module adopts receive channel modification method, and the RSSI in corrected received capability correction form detects magnitude of voltage.
3. a device as claimed in claim 2, described transmit power correction unit comprises: comprise microwave signal calibration unit and power monitoring unit, described microwave signal calibration unit comprises the first power demodulator diode, the second power demodulator diode, microwave amplifier and lossy microwave device, be arranged in identical temperature environment by described first power demodulator diode and the second power demodulator diode, described power monitoring unit comprises integral compensation circuit, linear regulation circuit, power control circuit and difference channel;
Described lossy microwave device, microwave amplifier, the first power demodulator diode, differential amplifier circuit, linear regulation circuit are connected successively with integral compensation circuit, and integral compensation circuit is connected with lossy microwave device, lossy microwave device, microwave amplifier, the first power demodulator diode, differential amplifier circuit, linear regulation circuit and integral compensation circuit is made to form a close loop control circuit, described second power demodulator diode is connected with difference channel, and described power control circuit is connected with integral compensation circuit.
4. a device as claimed in claim 3, the described microwave communication device based on uhf band also comprises adaptive line compensating unit, transmits the linearly distortion or non-equilibrium that cause for compensated line.
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