CN201639582U - Repeater solving mobile object coverage - Google Patents
Repeater solving mobile object coverage Download PDFInfo
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- CN201639582U CN201639582U CN200920270688XU CN200920270688U CN201639582U CN 201639582 U CN201639582 U CN 201639582U CN 200920270688X U CN200920270688X U CN 200920270688XU CN 200920270688 U CN200920270688 U CN 200920270688U CN 201639582 U CN201639582 U CN 201639582U
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Abstract
The utility model discloses a repeater solving mobile object coverage, which comprises a donor antenna, a forwarding antenna, two duplexers, and a downlink and an uplink which are arranged between the two duplexers, the donor antenna and the forwarding antenna are respectively connected with one of the duplexers, and the downlink and the uplink respectively comprise a low-noise amplifier, a band-pass filter and a power amplifier which are sequentially connected; the repeater also comprises a control unit, which is connected with the low-noise amplifiers, the band-pass filters and the power amplifiers in the downlink and the uplink, and the control unit measures downlink signals and automatically regulates the gains of the downlink and the uplink. The repeater is characterized by low noise, high receiving sensitivity and stationary wireless signals, and is applicable to communication systems such as GSM, DCS, WCDMA, CDMA, GOTA, iDEN and TETRA.
Description
Technical field
The utility model relates in the communication technical field, relates to a kind of repeater that is used to solve the inner covering problem of mobile objects such as boats and ships or vehicle in particular.
Background technology
In existing mobile communications system, in order to guarantee the proper communication of portable terminal and base station, the zone that can't directly cover in some base stations is provided with the repeater, Fig. 1 is the structure chart of existing RF direct amplifying station, at down direction, by donor antenna 10 pickoff signals from existing overlay area, successively behind duplexer 1, low noise amplifier 2, again by the out-of-band signal of band pass filter 3 filtered signals, with the signal of filtering through power amplifier 4 amplify and via duplexer 5 after, be transmitted into once more by forwarding antenna 20 and treat the overlay area; At up direction, the signal of the portable terminal in the overlay area is transmitted into corresponding base station through after the similar processing procedure, thereby realize the signal transmission of base station and portable terminal, the introducing of repeater has realized portable terminal in its overlay area and the proper communication between the base station.
For as mobile objects such as the vehicle of the most common vehicles or boats and ships, because these mobile objects generally are metal structure, shielded mobile phone signal, so the shortcoming that often has the speech quality difference even can't converse in the car and in the ship becomes necessity so install repeater for it.Because the carrier of this installing repeater is in the middle of the motion always, so the distance between itself and the base station is in the middle of the variation always, its frequency that receives constantly changes, and often there is too high upstream noise in existing repeater, receiving sensitivity is low and the jiggly problem of wireless signal.
In view of this, the inventor has this case to produce at the above-mentioned defective further investigation of existing repeater then.
The utility model content
The purpose of this utility model is to provide a kind of repeater that moving body covers that solves, with solve noise height in the prior art, receiving sensitivity is low and the jiggly problem of wireless signal.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of repeater that solves the moving body covering, comprise donor antenna, forwarding antenna, two duplexers and be arranged on two down link and up links between the duplexer, this donor antenna links to each other with a duplexer respectively with forwarding antenna, and this down link includes low noise amplifier, band pass filter and the power amplifier that links to each other successively with up link; Wherein, this repeater also comprises control unit, in this down link in low noise amplifier, power amplifier and the up link low noise amplifier, power amplifier all link to each other with control unit, this control unit measures downstream signal and adjust automatically down/gain of up link.
Further, low noise amplifier in this down link includes the prime amplification module that links to each other successively with power amplifier, middle rank amplification module and final stage amplification module, this control unit comprises the input detection module, the output detection module, automatic electric-level control module and attenuation module, this input detection module above-mentioned amplifier input terminal that is coupled, the be coupled output of above-mentioned amplifier of this output detection module, this automatic electric-level control module and attenuation module all are connected in the circuit in the above-mentioned amplifier, this output detection module also links to each other with the automatic electric-level control module, and this automatic electric-level control module and attenuation module are according to the input detection module and export the value that detection module obtains and adjust corresponding gain.
Further, this automatic electric-level control module is connected between prime amplification module and the intermediate amplification module, and this attenuation module is connected between intermediate amplification module and the final stage amplification module.
Further, this control unit is according to the gain of up link and adjust the gain of down link automatically.
Further, this control unit also is connected with portable antenna, and this portable antenna is communicated by letter with the portable antenna of central computer.
After adopting said structure, because this repeater also includes control unit, the gain of this whole repeater of control unit rapid adjustment, make the repeater that is arranged on the mobile objects such as vehicle or boats and ships have stable power output, promptly make in the ship, wireless signal in the car is steady relatively, simultaneously when the repeater very when the base station, the control of its automatic gain can realize the not effectiveness of interference base station, and because this up-downgoing gain is controlled by control unit, thereby can avoid system when gain is excessive, to produce too high upstream noise, avoid base station system along the line is caused interference.
Description of drawings
Fig. 1 is the structural representation of repeater in the prior art;
A kind of structural representation that solves the repeater of moving body covering that Fig. 2 relates to for the utility model;
Fig. 3 makes the functional-block diagram of time spent mutually for control unit in the utility model and low noise amplifier or power amplifier.
Among the figure:
Donor antenna 10 forwarding antennas 20
Final stage amplification module 23 input detection modules 61
Embodiment
In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.
As shown in Figure 1, a kind of repeater that solves the moving body covering that the utility model relates to, comprise donor antenna 10, forwarding antenna 20, two duplexers 1,2 and be arranged on down link and up link between two duplexers 1,2, this donor antenna 10 links to each other with a duplexer respectively with forwarding antenna 20, and this down link includes low noise amplifier 2, band pass filter 3 and the power amplifier 4 that links to each other successively with up link.Above-mentionedly be module of the prior art,, stress improvement of the present utility model below so be not described in detail:
The repeater that the utility model relates to also comprises control unit, in this down link in low noise amplifier 2, power amplifier 4 and the up link low noise amplifier 2, power amplifier 4 all link to each other with control unit 6, this control unit 6 measures downstream signals and adjust automatically down/gain of up link.
Like this, because this repeater also includes control unit 6, the gain of this whole repeater of control unit 6 rapid adjustment, make the repeater that is arranged on the mobile objects such as vehicle or boats and ships have metastable power output, make that promptly the wireless signal that ship is interior, car is interior is steady relatively, simultaneously when the repeater very when the base station, the control of its automatic gain also can realize the not effectiveness of interference base station; And control by control unit because this up-downgoing gains, thereby can avoid system when gain is excessive, to produce too high upstream noise, reduce the receiving sensitivity of base station system along the line.The utility model is not limited to concrete communication system, and applicable to communication systems such as GSM, DCS, WCDMA, CDMA, GOTA, iDEN, TETRA.
In order to express low noise amplifier 2 in control unit and the down link or the action principle between the power amplifier 4, as shown in Figure 2, low noise amplifier 2 in this down link includes the prime amplification module 21 that links to each other successively with power amplifier 4, middle rank amplification module 22 and final stage amplification module 23, this control unit 6 comprises input detection module 61, output detection module 62, automatic electric-level control module 63 and attenuation module 64, the above-mentioned amplifier input terminal of these input detection module 61 couplings, the output of the above-mentioned amplifier of these output detection module 62 couplings, this automatic electric-level control module 63 and attenuation module 64 all are connected in the circuit in the above-mentioned amplifier, this output detection module 62 also links to each other with automatic electric-level control module 63, and this automatic electric-level control module 63 and attenuation module 64 are according to input detection module 61 and export the value that detection module 62 obtains and adjust corresponding gain.This control unit 6 is adjusted the gain of down link automatically according to the gain of up link, thereby avoids system to produce too high upstream noise when gain is excessive.
As embodiment, this automatic electric-level control module 63 is connected between prime amplification module 21 and the intermediate amplification module 22, and this attenuation module 64 is connected between intermediate amplification module 22 and the final stage amplification module 23.
For this control unit 6 is monitored, operation such as renewal, this control unit 6 also is connected with the portable antenna (not shown), this portable antenna is communicated by letter with the portable antenna of central computer.
For the utility model can more clearly be implemented, below the software design that relates in the control unit in the utility model is further detailed.
In order to realize the dynamic gain control of repeater, a link of common repeater has only the gain control function of 30dB, the not requirement of interference base station in the time of can not satisfying the repeater very near the base station.When the repeater very when the base station for interference base station not, the gain control function that one way link has 60dB has been designed in this repeater.Specify as follows:
1, the explanation of AGC Based Intelligent Control
When upper layer software (applications) is provided with descending AGC (Automatic Gain Control) automatic gain control switch be " ON " time, the repeater enters the automatic gain state of a control.Judge by the output that detects LNA (Low Noise Amplifier) low noise amplifier, carry out ATT (promptly referring to attenuation module) and ascending power threshold setting automatically.If X is that the output of LNA is flat, the ATT method to set up is as follows:
(1): when X＞-during 8dBm, promptly more and more near the base station;
Descending LNA ATT value=(X-(the 10)+former value of setting (regardless of being former manual setting or automatic the setting), as the output detection of descending LNA be-6dBm, the former value of setting is 5dB, the ATT value that descending LNA then is set is-6-(10)+5=9dB; Up value of the setting=descending value of setting; When the value of obtaining of setting greater than 31 the time, be set to maximum 31;
(2): when-12dBm≤X≤-during 8dBm, i.e. optimum Working; The ATT value of descending LNA keeps former value of setting (no matter being former manual setting or automatic the setting), the ATT value of up LNA=descending LNA ATT value; Detect as the output of descending LNA and to be-9dBm, the former value of setting is 5dB, and the ATT value that descending LNA then is set is that 5dB is constant;
(3): when X＜-during 12dBm, during promptly gradually away from the base station; Descending LNA ATT value=(X-(the 10)+former value of setting (regardless of being former manual setting or automatic the setting), as the output detection of descending LNA be-16dBm, the former value of setting is 9dB, the ATT value that descending LNA then is set is-16-(10)+9=3dB; Up value of the setting=descending value of setting; When the value of obtaining of setting less than 0 the time, be set to minimum value 0; Detect as the output of descending LNA and to be-16dBm, the former value of setting is 0dB, and the ATT value that descending LNA then is set is-16-(10)+0=-6dB＜0 then up value of the setting=descending value of setting=0;
During for fear of too close base station, up power output is excessive, and this system can be provided with up output thresholding automatically according to descending input power, avoids the saturation of receiver of base station.
When upper layer software (applications) be provided with up ALC automatic electric-level control switch for " ON " time, on be advanced into up thresholding and be provided with automatically.The automatic method to set up of up thresholding is:
When ATT=0 among the LNA～3 (Pin＜-52dBm), up thresholding=33dBm;
When ATT=4 among the LNA～10 (51dBm＜Pin＜-45dBm), up thresholding=30dBm;
When ATT=11 among the LNA～17 (44dBm＜Pin＜-38dBm), up thresholding=27dBm;
When ATT=18 among the LNA～24 (37dBm＜Pin＜-31dBm), up thresholding=21dBm;
When ATT=25 among the LNA～30 (30dBm＜Pin＜-26dBm), up thresholding=17dBm;
When ATT=25 among the LNA～31 (Pin＞-25dBm), up thresholding=10dBm.
2, ALC (being automatic electric-level module module) control
According to the power threshold that is provided with, the ATT of power amplifier is set automatically.Power threshold as descending setting is: 40dBm, then when exporting greater than 40dBm, the ATT of the power amplifier of then decaying automatically is up to being output as 40 ± 1dBm.Method to set up is as follows:
(1), when X＞power threshold+1:
Descending HPA ATT value=(X-(the power threshold)+former value of setting (no matter being former manual setting or automatic the setting) is 43dBm as the output detection of descending HPA, and the former value of setting is 5dB, and the ATT value that descending HPA then is set is 43-(40)+5=8dB; When the value of obtaining of setting greater than 31 the time, be set to maximum 31.
(2), when power threshold-1≤X≤power threshold+1:
It is optimum Working; The ATT value of descending HPA keeps former value of setting (no matter being former manual setting or automatic the setting), is 39dBm as the output detection of descending HPA, and the former value of setting is 5dB, and the ATT value that descending HPA then is set is constant for 5dB.
(3), when X＜power threshold-1:
Descending HPA ATT value=(X-(the 10)+former value of setting (no matter being former manual setting or automatic the setting) is 36dBm as the output detection of descending LNA, and the former value of setting is 9dB, and the ATT value that descending HPA then is set is 36-(40)+9=5dB; When the value of obtaining of setting less than 0 the time, be set to minimum value 0; Output detection as descending HPA is 36dBm, and the former value of setting is 0dB, and the ATT value that descending LNA then is set is 36-(40)+0=-4dB＜0, then the HPA ATT value of setting=0; Up method is with descending, so do not give unnecessary details.
Data during below to concrete the application are made a concrete analysis of explanation:
The basic parameter explanation:
Access base station transmitting power Pb: establishing the base station is 4 carrier waves, and every carrier wave is output as 43dBm, is output as Pb=43-6=37dBm/CH after then closing the road;
The feeder loss Lb=3dB of base station;
The transmitter antenna gain (dBi) Gb=16dBi of base station;
The receiving antenna gain Gr=12dBi of repeater;
The down output power Po-d of repeater, descending input power Pi-d;
The up power output Po-u=37dBm/CH of repeater, descending input power Pi-u;
The up gain G r-u=90dB of repeater, descending gain G r-d=95dB,
The up-downgoing AGC=60dB of repeater;
If the minimum distance Db-r=100m of base station and repeater, then during 900MHz, the free-space loss of 100m;
LDb-r＝32.4+20lgf+20lgd＝32.4+20lg900+20lg0.1＝71.5dB
1, downlink analysis:
The descending input power Pi-d=Pb-Lb+Gb-LDb-r+Gr-Lr of repeater
＝37-3+16-71.5+12-3
＝-12.5dBm
The maximal input that the Po-d=Pi-d+Gr-d-AGC repeater allows:
Pi-dmax＝Po-d-Gr-d-AGC＝37-95+60＝2dBm
So the maximal input of repeater can not cause the overpower self-excitation much larger than the reality input power during close base station.
2, up link analysis:
What up link was mainly considered is that mobile phone signal arrival base station can be by demodulation; Up noise level of amplifying arrival base station, back is less than the maximum noise level that the base station can allow, to guarantee not interference base station.
(1) the base station incoming level is analyzed:
The gsm protocol regulation, the mobile phone transmitting power can be by base stations control.The base station is by descending SACCH channel, give an order and control the power level of mobile phone, each power rank difference 2dB, GSM900 mobile phone maximum transmit power level is 5 (33dBm), the minimum emissive power rank is 19 (5dBm), DCS1800 mobile phone maximum transmit power level is 0 (30dBm), and the minimum emissive power rank is 15 (0dBm).The minimum incoming level of base station is-104dBm.
If the received field strength of mobile phone under antenna is-35dBm that then the link load of repeater arrival mobile phone is:
37-(-35)＝72dB；
Suppose mobile phone with minimum emissive power 5dBm emission, repeater working gain when the most close base station is least gain Gr-u-AGC=90-60=30dB;
The up power output Po-u=5-72+30=-37dBm of repeater then
The level that arrives the base station is Rx-u=Po-u-Lr+Gr-LDb-r+Gb-Lb
＝-37-3+12-71.5+16-3＝-86.5＞-104dBm
So the base station can demodulation.
Suppose when the cellphone subscriber starts shooting with maximum power 33dBm emission, then
Up power output Po-u=33-72+30=-9dBm＜+10dBm,
So uply the overpower self-excitation can not occur.
(2) upstream noise analysis:
For interference base station is not up, require uply through after amplifying, make an uproar less than-120dBm in the up end that arrives the base station;
The noise factor of repeater is generally 5dB, then:
The equipment white noise=-174dBm/HZ=-121dBm/200KHz
The up end that arrives the base station makes an uproar=white noise+noise factor of up working gain-pure path loss+equipment=(90-60)-(43-(12.5))+(121)+5=-141.5＜-120dBm.
So can interference base station.
Through above analysis, the AGC control range is that 60dB satisfies system requirements fully.
The foregoing description and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.
Claims (5)
1. one kind solves the repeater that moving body covers, comprise donor antenna, forwarding antenna, two duplexers and be arranged on two down link and up links between the duplexer, this donor antenna links to each other with a duplexer respectively with forwarding antenna, and this down link includes low noise amplifier, band pass filter and the power amplifier that links to each other successively with up link; It is characterized in that, this repeater also comprises control unit, in this down link in low noise amplifier, power amplifier and the up link low noise amplifier, power amplifier all link to each other with control unit, this control unit measures downstream signal and adjust automatically down/gain of up link.
2. a kind of repeater that moving body covers that solves as claimed in claim 1, it is characterized in that, low noise amplifier in this down link includes the prime amplification module that links to each other successively with power amplifier, middle rank amplification module and final stage amplification module, this control unit comprises the input detection module, the output detection module, automatic electric-level control module and attenuation module, this input detection module above-mentioned amplifier input terminal that is coupled, the be coupled output of above-mentioned amplifier of this output detection module, this automatic electric-level control module and attenuation module all are connected in the circuit in the above-mentioned amplifier, this output detection module also links to each other with the automatic electric-level control module, and this automatic electric-level control module and attenuation module are according to the input detection module and export the value that detection module obtains and adjust corresponding gain.
3. a kind of repeater that moving body covers that solves as claimed in claim 2 is characterized in that this automatic electric-level control module is connected between prime amplification module and the intermediate amplification module, and this attenuation module is connected between intermediate amplification module and the final stage amplification module.
4. as claim 2 or 3 described a kind of repeaters that moving body covers that solve, it is characterized in that this control unit is adjusted the gain of down link automatically according to the gain of up link.
5. as each described a kind of repeater that moving body covers that solves of claim 1 to 3, it is characterized in that this control unit also is connected with portable antenna, this portable antenna is communicated by letter with the portable antenna of central computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920270688XU CN201639582U (en) | 2009-11-23 | 2009-11-23 | Repeater solving mobile object coverage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200920270688XU CN201639582U (en) | 2009-11-23 | 2009-11-23 | Repeater solving mobile object coverage |
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| CN201639582U true CN201639582U (en) | 2010-11-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742631B (en) * | 2009-11-23 | 2012-07-04 | 福建京奥通信技术有限公司 | Repeater for solving covering of moving body and control method thereof |
| CN106253962A (en) * | 2016-08-02 | 2016-12-21 | 大连金盛义电子科技有限公司 | A kind of wireless signal extension apparatus |
| CN107438960A (en) * | 2015-04-27 | 2017-12-05 | 康普技术有限责任公司 | Via data network transmission modulation radio signal of communication |
| CN108288992B (en) * | 2017-01-09 | 2020-09-01 | 展讯通信（上海）有限公司 | Method and device for automatically controlling gain of micro repeater and baseband chip |
| WO2023120073A1 (en) * | 2021-12-24 | 2023-06-29 | 株式会社村田製作所 | High frequency circuit and communication device |
-
2009
- 2009-11-23 CN CN200920270688XU patent/CN201639582U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742631B (en) * | 2009-11-23 | 2012-07-04 | 福建京奥通信技术有限公司 | Repeater for solving covering of moving body and control method thereof |
| CN107438960A (en) * | 2015-04-27 | 2017-12-05 | 康普技术有限责任公司 | Via data network transmission modulation radio signal of communication |
| US10797782B2 (en) | 2015-04-27 | 2020-10-06 | Commscope Technologies Llc | Transport of modulated radio communication signals over data networks |
| US10879993B2 (en) | 2015-04-27 | 2020-12-29 | Commscope Technologies Llc | Transport of modulated radio communication signals over data networks |
| CN106253962A (en) * | 2016-08-02 | 2016-12-21 | 大连金盛义电子科技有限公司 | A kind of wireless signal extension apparatus |
| CN108288992B (en) * | 2017-01-09 | 2020-09-01 | 展讯通信（上海）有限公司 | Method and device for automatically controlling gain of micro repeater and baseband chip |
| WO2023120073A1 (en) * | 2021-12-24 | 2023-06-29 | 株式会社村田製作所 | High frequency circuit and communication device |
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Granted publication date: 20101117 Termination date: 20111123 |