CN202503509U - Microwave remote system - Google Patents
Microwave remote system Download PDFInfo
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- CN202503509U CN202503509U CN2012200494173U CN201220049417U CN202503509U CN 202503509 U CN202503509 U CN 202503509U CN 2012200494173 U CN2012200494173 U CN 2012200494173U CN 201220049417 U CN201220049417 U CN 201220049417U CN 202503509 U CN202503509 U CN 202503509U
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Abstract
A microwave remote system used to extend communication coverage between a base station and a mobile terminal comprises an access unit, a microwave transmission unit and a coverage unit. The access unit performs up-restoration on intermediate frequency signals from the microwave transmission unit to enable the frequencies of the intermediate frequency signals to be on frequency points of communication frequencies and amplifies the signals, and thereafter transmits the signals to the base station, or the access unit performs down-conversion on communication signals from the base station to enable the frequencies of the communication signals to be on frequency points of the intermediate frequencies, and amplifies the signals, and thereafter transmits the signals to the microwave transmission unit; the microwave transmission unit performs up-conversion on signals from the coverage unit to enable the frequencies of the signals to be on designated microwave frequency points, and amplifies the signals, or the microwave transmission unit performs down-conversion on signals from the access unit to enable the frequencies of the signals to be on the frequency points of the intermediate frequencies and outputs the signals through an intermediate frequency interface; and the coverage unit is used to perform frequency-conversion on communication uplink communication signals received from the mobile terminal to enable the frequencies of the communication uplink communication signals to be on the frequency points of the intermediate frequencies, and thereafter transfers the signals to the microwave transmission unit, or the coverage unit performs frequency-restoration on the intermediate frequency signals sent by the microwave transmission unit to enable the frequencies of the intermediate frequency to be on the frequency points of the communication frequencies.
Description
[technical field]
The utility model relates to mobile communication network optimization system field, relates in particular to a kind of network optimization system that adopts microwave outdoor unit to make the relay transmission media, relates more specifically to a kind of micro-wave extension system.
[background technology]
The general trunking that uses the repeater as base station signal or the transmission of portable terminal signal in GSM.At first amplify the descending communication signal of base station or the uplink communication signal of portable terminal the repeater; Transmit the upstream or downstream signal of communication after this amplification then; So that can realize extension with relatively low cost, the coverage of mobile communication signal is further extended to base station functions.
The repeater is made up of base station end (near-end) duplexer, descending amplification module, up amplification module and mobile terminal (far-end) duplexer.Wherein, form down link by near-end duplexer, descending amplification module, far-end duplexer successively, and form up link by far-end duplexer, up amplification module, near-end duplexer successively.
For extending the practical function scope of repeater, industry often adopts the repeater far-drawing system.In the far-drawing system of repeater, the repeater can be separated into relay and capped end on function, and both are respectively near base station end and mobile you setting.Relay and capped end comprise essentially identical communication component, and both mainly are that certain the node place in up link and down link is separated, and keep electrical connection between the two, just on function, separate into relay and capped end two parts.Like this, the relay is near base station end, and capped end is near travelling carriage, thereby more helps bringing into play the effect of repeater.
Usually, the relay and the electric connection between the capped end of repeater can be accomplished in several ways, such as passing through realizations such as optical fiber, netting twine, coaxial line.But all there are drawbacks such as equipment cost height, engineering construction complicacy the repeater of these types, and because what adopt is entity medium, and is should this transmission link very big to the reliability effect of repeater work.Especially when optical fiber, netting twine, coaxial line etc. break down, can directly cause the repeater complete machine to break down, thereby influence the normal operation of communication system.Therefore traditional entity transmission media repeater requires application scenarios such as height, quick covering to be difficult to be suitable for requirement at difficult wiring, communication reliability.
As a kind of improvement, industry adopts the micro-wave extension system of microwave outdoor unit (or being called the microwave transmission unit) as transmission medium recently, to guarantee effectively to extend the coverage distance of base station, does not influence the operate as normal of base station simultaneously.
Yet the subject matter of the micro-wave extension systems face that realizes based on the microwave transmission unit is following:
1, the uncertainty of microwave link loss.
Since the microwave signal loss in the free space transmission course, receive external environment such as mist, rain, snow, and the influence of natural obstacle thing etc. bigger, so the microwave link loss has very big uncertainty.
2, the frequency error problem of microwave transmission unit.
When adopting microwave signal as the transmission medium of signal relay, be microwave frequency band because microwave signal uses, therefore need signal of communication be modulated on the microwave frequency band, need the microwave signal that receive be downconverted to original communication signal frequency band simultaneously.In frequency conversion process, with bringing bigger frequency error.When frequency error surpasses to a certain degree, will cause distorted signals and can't proper communication.
3, the Frequency Synchronization problem of micro-wave extension system access unit and capping unit.
Because microwave unit adopts the operation of intermediate frequency frequency range, therefore in access unit and capping unit, need communicate radiofrequency signal and move to the twice frequency of communication radio frequency signal to intermediate-freuqncy signal and intermediate-freuqncy signal.In the frequency translation process,, will cause communication radio frequency signal frequency of occurrences error if the local vibration source of access unit and capping unit is unequal.
4, the uncertainty of the intermediate frequency feeder link loss of the access unit of micro-wave extension system and capping unit and microwave transmission unit.
Because the access unit and the capping unit of micro-wave extension system lay respectively at machine room and indoor, the microwave transmission unit then is positioned at open-air cat head, so the feeder line length in the middle of access unit, capping unit and the microwave transmission unit does not wait from several meters to hundreds of rice distance.In application process, the uncertainty of feeder loss causes the uncertain of micro-wave extension system gain.
In sum, be necessary to provide a kind of micro-wave extension system, so that the shortcoming that overcomes above-mentioned prior art is with not enough.
[utility model content]
The purpose of the utility model is to provide a kind of micro-wave extension system, and it has guaranteed the certainty of microwave link loss effectively; Reduced the frequency error of microwave transmission unit; Kept the Frequency Synchronization between access unit and the capping unit; Simultaneously, kept the certainty of the intermediate frequency feeder link loss of access unit and capping unit and microwave transmission unit effectively.
For realizing this purpose, the utility model adopts following technical scheme:
A kind of micro-wave extension system is used to prolong the communication coverage between base station and the portable terminal, comprising: access unit, microwave transmission unit and capping unit.Access unit is used for the Frequency point that reverts to the communication frequency of appointment on the intermediate-freuqncy signal from the microwave transmission unit; The while amplifying signal; Send amplifying signal to base station then; Perhaps, simultaneously signal is amplified, then amplifying signal is transferred to the microwave transmission unit coming signal of communication to be down-converted on the IF-FRE point of appointment since the base station; The microwave transmission unit is used for upconverting to the signal of coming from capping unit the microwave frequency point of appointment; The while amplifying signal; The signal of perhaps coming access unit is down-converted on the IF-FRE point of appointment; Guarantee that simultaneously the intermediate-freuqncy signal level in the scope of appointment, exports through IF interface; Capping unit is used for being converted to the communication uplink communication signal that receives from portable terminal the IF-FRE point of appointment, and the microwave transmission unit is given in transmission then, and the intermediate-freuqncy signal that perhaps sends over the microwave transmission unit reverts on the frequency of communication frequency.Said access unit comprises: the first descending pilot frequency generation unit, be used to produce the intermediate frequency pilot signal, and link load is proofreaied and correct, the functions such as frequency departure correction of microwave transmission unit for capping unit provides; The second descending pilot frequency generation unit is used to produce the intermediate frequency pilot signal, and this intermediate frequency pilot signal provides clock source synchronizing information with the intermediate frequency pilot signal that the first descending pilot frequency generation unit produces for capping unit; Clock unit is used for the reference clock as access unit, is up-downgoing frequency conversion local oscillator, and the generation of two pilot signals provides reference; Calibrating frequency local oscillator generation unit; The pilot signal that is used to utilize capping unit to send produces local oscillation signal through frequency synthesizer; This local oscillation signal possesses identical frequency departure with uplink communication signal through microwave transmission unit frequency conversion transmission, and this local oscillation signal is also as the reference of intermediate frequency feeder loss compensation simultaneously; And up feeder loss gain compensation unit, the compensate for reference that is used for producing through calibrating frequency local oscillator generation unit is proofreaied and correct uplink gain, compensates up feeder loss, guarantees uplink communication signal stable of access unit.
Compared with prior art, the utility model possesses following advantage:
Owing in access unit and capping unit, adopted clock source and clock correction source; In capping unit, be provided with simultaneously calibrating frequency local oscillator generation unit; Through the clock synchronization effect in clock source and clock correction source and the calibrating frequency effect of calibrating frequency local oscillator generation unit, make native system guarantee the certainty of microwave link loss effectively; Reduced the frequency error of microwave transmission unit; Kept the Frequency Synchronization between access unit and the capping unit; Simultaneously, kept the certainty of the intermediate frequency feeder link loss of access unit and capping unit and microwave transmission unit effectively.
[description of drawings]
Fig. 1 has showed the system block diagram of the micro-wave extension system of an embodiment of the utility model, has showed base station that is connected with this system through antenna for base station and the capping unit antenna that is connected with this system simultaneously;
Fig. 2 detail the system block diagram of access unit of micro-wave extension shown in Figure 1 system;
Fig. 3 has showed the system block diagram of the first microwave transmission unit of micro-wave extension shown in Figure 1 system; And
Fig. 4 detail the system block diagram of capping unit of micro-wave extension shown in Figure 1 system.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
See also Fig. 1-4, according to an embodiment of the utility model, a kind of micro-wave extension system 900 comprises access unit 100, microwave transmission unit 400 and capping unit 200.Said micro-wave extension system 900 is used for effectively extending the signal cover of base station 300, in other words, is used to prolong the communication coverage between base station 300 and the portable terminal 700.
The course of work of said access unit 100 is divided into both direction, and the one, up, another is descending.Up is on the Frequency point of the communication frequency that reverts to appointment on the intermediate-freuqncy signal from microwave transmission unit 400, amplifying signal simultaneously, then with amplifying signal through giving base station 300 such as antenna for base station 301; Descending is coming the signal of communication since base station 300 to be down-converted on the IF-FRE point of appointment, simultaneously signal is amplified, then amplifying signal being transferred to microwave transmission unit 400.In up process, realized the automatic gain compensation of microwave link, and in descending process, then realized the road of closing of signal of communication and pilot signal.
The course of work of said microwave transmission unit 400 is divided into both direction, and the one, up, another is descending.Up is to upconvert to the signal of coming from capping unit 200 on the microwave frequency point of appointment, simultaneously amplifying signal; Descending is to be down-converted to the signal that access unit 100 is come on the IF-FRE point of appointment, guarantees that simultaneously the intermediate-freuqncy signal level in the scope of appointment, exports through IF interface.
The course of work of said capping unit 200 is divided into both direction, and the one, up, another is descending.Up is to be converted to the communication uplink communication signal that receives from portable terminal 700 on the IF-FRE point of appointment, and microwave transmission unit 400 is given in transmission then; Descending is to revert to the intermediate-freuqncy signal that microwave transmission unit 400 sends on the frequency of communication frequency.In descending, realized the automatic gain compensation of microwave link, the frequency error calibration, and in up, then realized the road of closing of a signal of communication and a pilot signal.
Introduce the detailed structure of each building block of micro-wave extension system 900 below in detail.
As shown in Figure 2, said access unit 100 comprises:
Coupled section duplex unit 101, base station is used for the 300 coupling uplink and downlink communication signals from the base station;
Descending communication signal down-converter unit 102 is used for the descending communication signal from base station 300 is converted to the signal of IF interface frequency;
The first descending pilot frequency generation unit 105 is used to produce the intermediate frequency pilot signal, and link load is proofreaied and correct, the functions such as frequency departure correction of microwave transmission unit 400 for capping unit 200 provides;
The second descending pilot frequency generation unit 1051 is used to produce the intermediate frequency pilot signal, and this intermediate frequency pilot signal provides clock source synchronizing information with the intermediate frequency pilot signal that the first descending pilot frequency generation unit 105 produces for capping unit 200;
Descending IF interface combiner unit 103 is used for descending communication signal and two intermediate frequency pilot signals are closed the road, passes through access unit intermediate frequency duplexer 104 and feed-in microwave transmission unit 400;
Access unit intermediate frequency duplexer 104, the signal that is used for the up-downgoing intermediate-freuqncy signal of access unit 100 is closed behind road and the road will be as the IF interface of microwave transmission unit 400;
Calibrating frequency local oscillator generation unit 107; The pilot signal that is used to utilize capping unit 200 to send produces local oscillation signal through frequency synthesizer; This local oscillation signal possesses identical frequency departure with uplink communication signal through microwave transmission unit 400 frequency conversions transmission, and this local oscillation signal is also as the reference of intermediate frequency feeder loss compensation simultaneously;
Uplink communication signal up-conversion unit 108 is used for the signal of communication that is reduced to communication frequency through the up intermediate-freuqncy signal of frequency correction;
Uplink communication signal frequency cells 109 is used for the intermediate-freuqncy signal of microwave transmission unit 400 feed-ins and the calibrating frequency local oscillator of calibrating frequency local oscillator generation unit 107 generations are carried out mixing, thereby proofreaies and correct the frequency error that brings through microwave transmission unit 400;
Up feeder loss gain compensation unit 110, the compensate for reference that is used for producing through calibrating frequency local oscillator generation unit 107 is proofreaied and correct uplink gain, compensates up feeder loss, guarantees uplink communication signal stable of access unit 100;
Up intermediate-freuqncy signal branching unit 111 is used for the intermediate-freuqncy signal of microwave transmission unit 400 transmission is divided into uplink communication signal and pilot signal; And
ASK communication unit 112 is used to manage the information interaction between access unit 100 and the microwave transmission unit 400.
With reference to figure 3; According to an embodiment of the utility model, said microwave transmission unit 400 comprises interconnected duplexer 401, intermediate frequency automatic gain control unit 402, power amplifier 403, power controller 404, low noise amplifier 405, duplexer 406, low noise amplifier 405, power amplifier 408, direct-flow inverter 411, intermediate frequency automatic gain control unit 407, frequency mixer 415 and monitor unit 410.
With reference to figure 4, according to an embodiment of the utility model, said capping unit 200 comprises:
ASK communication unit 201 is used for being responsible for the information interaction between capping unit 200 and the microwave transmission unit 400;
Capping unit intermediate frequency duplexer 202 is used for the IF interface of the microwave transmission unit 400 that conduct links to each other with capping unit 200;
Descending feeder loss gain compensation unit 203 is used for proofreading and correct downlink gain through the compensate for reference that calibrating frequency local oscillator generation unit 207 produces, and compensates descending feeder loss, guarantees the stability of the descending communication signal of capping unit 200;
Descending communication signal frequency correction unit 204 is used for the intermediate-freuqncy signal of microwave transmission unit 400 feed-ins and the calibrating frequency local oscillator of calibrating frequency local oscillator generation unit 207 generations are carried out mixing, the frequency error that the correction communication radiofrequency signal is brought through microwave transmission unit 400;
Descending communication signal up-conversion unit 205 is used for being reduced to communication frequency through the descending intermediate-freuqncy signal of frequency correction and amplifying;
Calibrating frequency local oscillator generation unit 207; The pilot signal that is used to utilize access unit 100 to send produces local oscillation signal through frequency synthesizer; This local oscillation signal possesses identical frequency departure with the descending communication signal that transmits through 400 frequency conversions of microwave transmission unit, and this local oscillation signal also can be used as the reference of intermediate frequency feeder loss compensation simultaneously;
Last every trade pilot tone generation unit 209 is used for being responsible for producing the intermediate frequency pilot signal, and the reference of functions such as realizing link load correction, the 400 frequency departure corrections of microwave transmission unit is provided for access unit 100.
Uplink communication signal down-converter unit 210 is used for the uplink communication signal of portable terminal 700 is converted to the signal of the IF interface frequency of microwave transmission unit 400;
Descending branching unit 211, the descending intermediate-freuqncy signal that is used for microwave transmission unit 400 is sent here is signal of communication and two pilot signals along separate routes; And
Up combiner unit 212 is used for communication intermediate-freuqncy signal and pilot signal are closed the road, the intermediate frequency input port of feed-in microwave transmission unit 400.
The work of facing the micro-wave extension system 900 of the utility model down was described in detail just now.
Generally, the work of said micro-wave extension system 900 is divided into two parts of up-downgoing.The up functions such as signal transmission, pilot transmission, link automatic gain compensation and microwave frequency error compensation that comprise; The descending functions such as Frequency Synchronization that then comprise signal transmission, pilot transmission, link automatic gain compensation, microwave frequency error compensation and access unit and capping unit.
Wherein, the descending function implementation procedure of said micro-wave extension system 900 is following:
After the microwave antenna feeder of capping unit 200 1 ends receives the microwave descending communication signal, this side microwave transmission unit 400 with the microwave descending communication signal downconvert to intermediate-freuqncy signal F1, the F2 of appointment, the frequency of three signals of F3 is transformed to signal F1 ', F2 ', F3 ' respectively.The downlink processing part that signal F1 ', F2 ', F3 ' process capping unit intermediate frequency duplexer 202 backs get into capping unit 200.
Then; Signal F2 ', F3 ' entering clock correction source 208; Said clock correction source 208 is made up of frequency mixer and frequency synthesizer; And clock source that equates with clock unit 106 of 208 outputs, clock correction source, the clock synchronization of access unit 100 with capping unit 200 so far realized as the clock reference of capping unit 200 in this clock source.
Signal F2 ' produces a reference local oscillator F0 ' through calibrating frequency local oscillator generation unit 207; Signal F1 ' and calibrating frequency local oscillator generation unit F0 ' carry out the mixing frequency conversion through descending communication signal frequency correction unit 204; Produce an intermediate-freuqncy signal F0 '-F1 '; This intermediate-freuqncy signal F0 '-F1 ' does not carry and inserts side microwave unit and the frequency error that covers the side microwave unit, has so far solved the frequency error problem that the microwave transmission unit is introduced.
Simultaneously, signal F2 ' produces a gain control signal through calibrating frequency local oscillator generation unit 207, and this control signal is controlled descending feeder loss gain compensation unit 203, guarantees that the power of signal F2 ' is a fixed value P0.Because signal F2 ' is that frequency conversion produces through intermediate-freuqncy signal F2; The power of intermediate-freuqncy signal F2 and signal F2 ' is P0 simultaneously; Therefore microwave link decay to 0dB, this decay does not change with the distance of microwave link, so has realized the automatic gain compensation of microwave link.
Intermediate-freuqncy signal F0 '-F1 ' process descending communication signal up-conversion unit 205 up-conversions are amplified to communication frequency simultaneously, and the descending communication signal after the amplification is given the descending covering that the capped end cover antenna communicates signal through duplexer 206.
Up function is embodied as descending inverse process, therefore repeats no more.
Therefore; The foregoing description is the utility model preferred implementation; But not merely be restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify, and all should be the substitute mode of equivalence, all is included within the protection range of the utility model.
Claims (4)
1. a micro-wave extension system is used to prolong the communication coverage between base station (300) and the portable terminal (700), comprising: access unit (100), microwave transmission unit (400) and capping unit (200), wherein:
Said access unit (100) is used for the Frequency point that reverts to the communication frequency of appointment on the intermediate-freuqncy signal from microwave transmission unit (400); The while amplifying signal; Send amplifying signal to base station (300) then; Perhaps, simultaneously signal is amplified, then amplifying signal is transferred to microwave transmission unit (400) coming signal of communication to be down-converted on the IF-FRE point of appointment since base station (300);
Said microwave transmission unit (400) is used for upconverting to the signal of coming from capping unit (200) the microwave frequency point of appointment; The while amplifying signal; The signal of perhaps coming access unit (100) is down-converted on the IF-FRE point of appointment; Guarantee that simultaneously the intermediate-freuqncy signal level in the scope of appointment, exports through IF interface;
Said capping unit (200) is used for being converted to the communication uplink communication signal that receives from portable terminal (700) the IF-FRE point of appointment; Microwave transmission unit (400) is given in transmission then, and the intermediate-freuqncy signal that perhaps sends over microwave transmission unit (400) reverts on the frequency of communication frequency;
It is characterized in that: said access unit (100) comprising:
The first descending pilot frequency generation unit (105) is used to produce the intermediate frequency pilot signal, and link load is proofreaied and correct, the frequency departure of microwave transmission unit (400) is proofreaied and correct for capping unit (200) provides;
The second descending pilot frequency generation unit (1051) is used to produce the intermediate frequency pilot signal, and this intermediate frequency pilot signal is that capping unit (200) provides clock source synchronizing information with the intermediate frequency pilot signal that the first descending pilot frequency generation unit (105) produces;
Clock unit (106) is used for the reference clock as access unit (100), for the generation of up-downgoing frequency conversion local oscillator and two pilot signals provides reference;
Calibrating frequency local oscillator generation unit (107); The pilot signal that is used to utilize capping unit (200) to send produces local oscillation signal through frequency synthesizer; This local oscillation signal possesses identical frequency departure with uplink communication signal through microwave transmission unit (400) frequency conversion transmission, and this local oscillation signal is also as the reference of intermediate frequency feeder loss compensation simultaneously; And
Up feeder loss gain compensation unit (110), the compensate for reference that is used for producing through calibrating frequency local oscillator generation unit (107) is proofreaied and correct uplink gain, compensates up feeder loss.
2. micro-wave extension according to claim 1 system, it is characterized in that: said access unit (100) further comprises:
Coupled section duplex unit (101), base station is used for (300) coupling uplink and downlink communication signal from the base station;
Descending communication signal down-converter unit (102) is used for the descending communication signal from base station (300) is converted to the signal of IF interface frequency;
Descending IF interface combiner unit (103) is used for descending communication signal and two intermediate frequency pilot signals are closed the road, passes through access unit intermediate frequency duplexer (104) and feed-in microwave transmission unit (400);
Access unit intermediate frequency duplexer (104) is used for the up-downgoing intermediate-freuqncy signal of access unit (100) is closed the road;
Uplink communication signal up-conversion unit (108) is used for the signal of communication that is reduced to communication frequency through the up intermediate-freuqncy signal of frequency correction;
Uplink communication signal frequency cells (109) is used for the intermediate-freuqncy signal of microwave transmission unit (400) feed-in and the calibrating frequency local oscillator of calibrating frequency local oscillator generation unit (107) generation are carried out mixing, thereby proofreaies and correct the frequency error that brings through microwave transmission unit (400);
Up intermediate-freuqncy signal branching unit (111) is used for the intermediate-freuqncy signal of microwave transmission unit (400) transmission is divided into uplink communication signal and pilot signal; And
ASK communication unit (112) is used to manage the information interaction between access unit (100) and microwave transmission unit (400).
3. micro-wave extension according to claim 2 system, it is characterized in that: said microwave transmission unit (400) comprising: interconnected duplexer (401), intermediate frequency automatic gain control unit (402), power amplifier (403), power controller (404), low noise amplifier (405), duplexer (406), low noise amplifier (405), power amplifier (408), direct-flow inverter (411), intermediate frequency automatic gain control unit (407), frequency mixer (415) and monitor unit (410).
4. micro-wave extension according to claim 3 system, it is characterized in that: said capping unit (200) comprising:
ASK communication unit (201) is used for being responsible for the information interaction between capping unit (200) and microwave transmission unit (400);
Capping unit intermediate frequency duplexer (202) is used for the IF interface of the microwave transmission unit (400) that conduct links to each other with capping unit (200);
Descending feeder loss gain compensation unit (203), the compensate for reference that is used for producing through calibrating frequency local oscillator generation unit (207) is proofreaied and correct downlink gain, compensates descending feeder loss, guarantees the stability of the descending communication signal of capping unit (200);
Descending communication signal frequency correction unit (204); Be used for the intermediate-freuqncy signal of microwave transmission unit (400) feed-in and the calibrating frequency local oscillator of calibrating frequency local oscillator generation unit (207) generation are carried out mixing, the frequency error that the correction communication radiofrequency signal is brought through microwave transmission unit (400);
Descending communication signal up-conversion unit (205) is used for being reduced to communication frequency through the descending intermediate-freuqncy signal of frequency correction and amplifying;
Capping unit duplexer (206);
Calibrating frequency local oscillator generation unit (207); The pilot signal that is used to utilize access unit (100) to send produces local oscillation signal through frequency synthesizer; This local oscillation signal possesses identical frequency departure with the descending communication signal that transmits through microwave transmission unit (400) frequency conversion, and this local oscillation signal also can be used as the reference of intermediate frequency feeder loss compensation simultaneously;
Clock correction source (208), two pilot signals that are used to utilize capping unit (200) to send produce the clock source through frequency synthesizer, and this clock source equates with the frequency in near-end clock source fully, solves the frequency error problem of whole micro-wave extension system;
Last every trade pilot tone generation unit (209) is used for being responsible for producing the intermediate frequency pilot signal, and the reference of functions such as the correction of realization link load, microwave transmission unit (400) frequency departure correction is provided for access unit (100),
Uplink communication signal down-converter unit (210) is used for the uplink communication signal of portable terminal (700) is converted to the signal of the IF interface frequency of microwave transmission unit (400);
Descending branching unit (211), the descending intermediate-freuqncy signal that is used for microwave transmission unit (400) are sent here is signal of communication and two pilot signals along separate routes; And
Up combiner unit (212) is used for communication intermediate-freuqncy signal and pilot signal are closed the road, the intermediate frequency input port of feed-in microwave transmission unit (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200494173U CN202503509U (en) | 2012-02-15 | 2012-02-15 | Microwave remote system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200494173U CN202503509U (en) | 2012-02-15 | 2012-02-15 | Microwave remote system |
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| CN202503509U true CN202503509U (en) | 2012-10-24 |
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| CN104301020A (en) * | 2014-10-22 | 2015-01-21 | 成都锐新科技有限公司 | Microwave self-adaptation communication device |
| CN104301022A (en) * | 2014-10-28 | 2015-01-21 | 成都锐新科技有限公司 | Microwave communication device based on UHF frequency bands |
| CN104348537A (en) * | 2014-10-29 | 2015-02-11 | 成都锐新科技有限公司 | Microwave equipment-based quick transmitting system |
| CN104363027A (en) * | 2014-10-28 | 2015-02-18 | 成都锐新科技有限公司 | Microwave frequency hopping transceiver |
| CN104467940A (en) * | 2014-10-29 | 2015-03-25 | 成都锐新科技有限公司 | Data forwarding system based on microwave equipment |
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| CN104301020A (en) * | 2014-10-22 | 2015-01-21 | 成都锐新科技有限公司 | Microwave self-adaptation communication device |
| CN104363027B (en) * | 2014-10-28 | 2017-04-12 | 成都锐新科技有限公司 | Microwave frequency hopping transceiver |
| CN104301022A (en) * | 2014-10-28 | 2015-01-21 | 成都锐新科技有限公司 | Microwave communication device based on UHF frequency bands |
| CN104363027A (en) * | 2014-10-28 | 2015-02-18 | 成都锐新科技有限公司 | Microwave frequency hopping transceiver |
| CN104467940B (en) * | 2014-10-29 | 2017-07-28 | 成都锐新科技有限公司 | A kind of data forwarding system based on microwave equipment |
| CN104467940A (en) * | 2014-10-29 | 2015-03-25 | 成都锐新科技有限公司 | Data forwarding system based on microwave equipment |
| CN104348537A (en) * | 2014-10-29 | 2015-02-11 | 成都锐新科技有限公司 | Microwave equipment-based quick transmitting system |
| CN104348537B (en) * | 2014-10-29 | 2017-09-26 | 成都锐新科技有限公司 | A kind of fast-forwarding system based on microwave equipment |
| CN107749774A (en) * | 2017-10-29 | 2018-03-02 | 深圳市中安神盾科技有限公司 | A kind of wireless signal amplifier for being used to solve the high-rise interference of mobile communication |
| CN114024557A (en) * | 2021-11-24 | 2022-02-08 | 京信网络***股份有限公司 | Signal transmission and covering method, signal access and covering unit |
| CN114401521A (en) * | 2021-12-16 | 2022-04-26 | 北京唯得科技有限公司 | Variable frequency communication transmission method and transmission system |
| CN115086988A (en) * | 2022-03-05 | 2022-09-20 | 广州市瀚云信息技术有限公司 | Passive network loss calibration method of 5G frequency conversion system |
| CN115086988B (en) * | 2022-03-05 | 2024-02-20 | 广州市瀚云信息技术有限公司 | Passive network loss calibration method for 5G frequency conversion system |
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