CN101742631B - Repeater for solving covering of moving body and control method thereof - Google Patents
Repeater for solving covering of moving body and control method thereof Download PDFInfo
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- CN101742631B CN101742631B CN2009102232958A CN200910223295A CN101742631B CN 101742631 B CN101742631 B CN 101742631B CN 2009102232958 A CN2009102232958 A CN 2009102232958A CN 200910223295 A CN200910223295 A CN 200910223295A CN 101742631 B CN101742631 B CN 101742631B
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Abstract
The invention discloses a repeater for solving covering of a moving body. The repeater comprises a donor antenna, a forwarding antenna, two duplexers, a downlink, an uplink, and a control unit, wherein the downlink and the uplink are arranged between the two duplexers; the donor antenna and the forwarding antenna are connected with one duplexer respectively; both the downlink and uplink comprise a low-noise amplifier, a bandpass filter and a power amplifier which are connected in turn; the low-noise amplifier and the power amplifier in the downlink, and the low-noise amplifier and the power amplifier in the uplink are connected with the control unit; and the control unit measures a downlink signal and automatically regulates the gain of the downlink/uplink. The repeater for solving the covering of the moving body has the characteristics of low noise, high receiving sensitivity and stable wireless signal, and can be applied to communication systems such as GSM, DCS, WCDMA, CDMA, GOTA, iDEN, TETRA and the like.
Description
Technical field
The present invention relates to communication technical field, relate to a kind of repeater and control method thereof 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, directly region covered is provided with the repeater in some base stations, and 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 through 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 through 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 and the proper communication between the base station in its overlay area.
For as mobile objects such as the vehicle of the most common vehicles or boats and ships; Because one is metal structure these mobile objects; Shielded mobile phone signal, thus in the car with ship in the shortcoming that often has the speech quality difference even can't converse, become 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 to the above-mentioned defective further investigation of existing repeater then.
Summary of the invention
First purpose of the present invention is to provide a kind of repeater that moving body covers that solves, and noise is high in the prior art, receiving sensitivity is low and the jiggly problem of wireless signal to solve.
In order to reach above-mentioned purpose, solution of the present invention 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 measure downstream signal and automatically adjustment down/gain of up link;
This control unit prestores and corresponding first algorithm of this reference value scope of living in and second algorithm corresponding with low noise amplifier pad value scope of living in; In conjunction with this reference value and pairing first algorithm of this reference value; Thereby obtain the concrete pad value of low noise amplifier, and obtain the ascending power thresholding according to the concrete pad value and second algorithm;
And this control unit also prestores downlink or uplink power threshold and the algorithm relevant with the downlink or uplink power threshold with this reference value, and the pad value of this downlink power amplifier calculates according to reference value and algorithm;
Wherein, establish the output level that X is LNA,
Above-mentioned first algorithm is:
(1): when X＞-during 8dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings, when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2): when-12dBm≤X≤-during 8dBm, the ATT value of descending LNA keeps former settings, the ATT value of up LNA=descending LNA ATT value;
(3): when X＜-during 12dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings; When the settings of obtaining less than 0 the time, be set to minimum value 0;
Above-mentioned second algorithm 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;
Above-mentioned algorithm is:
(1), when X＞power threshold+1:
Descending HPA ATT value=(X-(power threshold)+former settings), when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2), when power threshold-1≤X≤power threshold+1:
The ATT value of descending HPA keeps former settings;
(3), when X＜power threshold-1:
Descending HPA ATT value=(X-(10)+former settings), when the settings of obtaining less than 0 the time, be set to minimum value 0;
Up method is with descending.
Further; Low noise amplifier in this down link includes the prime amplification module that links to each other successively, intermediate amplification module and final stage amplification module with power amplifier; This control unit comprises input detection module, output detection module, automatic electric-level control module and attenuation module; The be coupled input of above-mentioned low noise amplifier and power amplifier of this input detection module; The be coupled output of above-mentioned low noise amplifier and power amplifier of this output detection module; This automatic electric-level control module and attenuation module all are connected in the circuit in above-mentioned low noise amplifier and the power amplifier, and 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 the up link Gain Automatic adjustment according to down link.
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.
Second purpose of the present invention is to provide a kind of control method that solves the repeater of moving body covering, and noise is high in the prior art, receiving sensitivity is low and the jiggly problem of wireless signal thereby solve.
In order to realize second purpose, solution of the present invention is:
A kind of control method that solves the repeater of moving body covering, it comprises:
Automatic gain control; Output to the low noise amplifier of down link detects; And obtaining reference value, this control unit prestores and corresponding first algorithm of this reference value scope of living in and second algorithm corresponding with low noise amplifier pad value scope of living in, in conjunction with this reference value and pairing first algorithm of this reference value; Thereby obtain the concrete pad value of low noise amplifier, and obtain the ascending power thresholding according to the concrete pad value and second algorithm;
Automatic electric-level control, this control unit also prestores downlink or uplink power threshold and the algorithm relevant with the downlink or uplink power threshold with this reference value, and the pad value of this downlink power amplifier calculates according to reference value and algorithm;
Wherein, establish the output level that X is LNA,
Above-mentioned first algorithm is:
(1): when X＞-during 8dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings, when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2): when-12dBm≤X≤-during 8dBm, the ATT value of descending LNA keeps former settings, the ATT value of up LNA=descending LNA ATT value;
(3): when X＜-during 12dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings; When the settings of obtaining less than 0 the time, be set to minimum value 0;
Above-mentioned second algorithm 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;
Above-mentioned algorithm is:
(1), when X＞power threshold+1:
Descending HPA ATT value=(X-(power threshold)+former settings), when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2), when power threshold-1≤X≤power threshold+1:
The ATT value of descending HPA keeps former settings;
(3), when X＜power threshold-1:
Descending HPA ATT value=(X-(10)+former settings), when the settings of obtaining less than 0 the time, be set to minimum value 0;
Up method is with descending.
Further, this low noise amplifier and power amplifier also all are preset with maximum output valve and minimum output valve, and when the value through control unit adjustment during greater than maximum, then choosing maximum is currency; When the value through control unit adjustment during less than minimum value, then choosing minimum value is currency.
Further, the pad value of low noise amplifier is adjusted according to the pad value of low noise amplifier in the down link automatically in the up link.
After adopting said structure; Because this repeater also includes control unit, the gain of this whole repeater of control unit rapid adjustment makes the repeater that is arranged on the mobile objects such as vehicle or boats and ships have stable power output; Make that promptly the wireless signal that ship is interior, car is interior is steady relatively; When repeater during very near the base station, the control of its automatic gain can realize the not effectiveness of interference base station simultaneously, and since this up-downgoing gain control 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;
Fig. 2 is a kind of structural representation that solves the repeater of moving body covering that the present invention relates to;
Fig. 3 makes the functional-block diagram of time spent mutually for control unit among the present invention 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 technical scheme of the present invention, come the present invention is set forth in detail through specific embodiment below.
As shown in Figure 1; A kind of repeater that solves the moving body covering that the present invention relates to; Comprise donor antenna 10, forwarding antenna 20, two duplexers 1,2 and be arranged on two duplexers 1, the down link between 2 and up link; 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 invention below so be not described in detail:
The repeater that the present invention 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 measure downstream signals and automatically adjustment 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 makes the repeater that is arranged on the mobile objects such as vehicle or boats and ships have metastable power output, makes that promptly the wireless signal that ship is interior, car is interior is steady relatively; When repeater during very near the base station, the control of its automatic gain also can realize the not effectiveness of interference base station simultaneously; 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 invention is not restricted to concrete communication system, and applicable to communication systems such as GSM, DCS, WCDMA, CDMA, GOTA, iDEN, TETRA.
In order to show low noise amplifier 2 or the action principle between the power amplifier 4 in control unit and the down link clearly; As shown in Figure 2; Low noise amplifier 2 in this down link includes prime amplification module 21, intermediate amplification module 22 and the final stage amplification module 23 that links to each other successively with power amplifier 4; 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 all is connected in the circuit in the above-mentioned amplifier with attenuation module 64, and 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 according to the gain of the up link Gain Automatic adjustment according to down link, thereby avoids system when gain is excessive, to produce too high upstream noise.
As embodiment, this automatic gain 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.
A kind of control method that solves the repeater of moving body covering that the present invention relates to, it comprises: automatic gain control (being AGC control) and automatic electric-level control (being ALC control), following mask body is controlled automatic gain and is described:
At first, the output of the low noise amplifier of down link is detected, and obtain reference value;
Then, owing to prestore first algorithm and second algorithm in the control unit, this first algorithm relates to the residing scope of reference value, and this second algorithm relates to low noise amplifier pad value scope of living in; This control unit calculates the concrete pad value of low noise amplifier in the down link through this reference value and first algorithm, and draws the ascending power thresholding according to the pad value and second algorithm of this down link simultaneously; The pad value of low noise amplifier then matees low noise amplifier pad value in this down link and is provided with in this up link.
Control describes following mask body to automatic electric-level:
At first, this control unit prestores descending power thresholding and the algorithm relevant with the descending power thresholding with this reference value;
Then, the pad value of this downlink power amplifier calculates according to reference value and algorithm.The computational methods of this ascending power thresholding are identical with the computational methods of this descending power thresholding.
Need to prove that this low noise amplifier and power amplifier also all are preset with maximum output valve and minimum output valve, when the value through control unit adjustment during greater than maximum, then choosing maximum is currency; When the value through control unit adjustment during less than minimum value, then choosing minimum value is currency.
For the present invention can more clearly be implemented, face the specific embodiment of the control method that relates in the control unit among the present invention down and further explain.
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 during very near 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 (being automatic gain control)
When upper layer software (applications) is provided with descending AGC (Automatic Gain Control) automatic gain control switch be " ON " time, the repeater gets into the automatic gain state of a control.Output through detecting LNA (Low Noise Ampiifier) low noise amplifier is judged, carries out ATT (promptly referring to attenuation module) and ascending power threshold setting automatically.If X is the output level of LNA, ATT method to set up (first algorithm that promptly prestores) as follows:
(1): when X＞-during 8dBm, promptly more and more near the base station;
Descending LNA ATT value=(X-(10)+former settings (regardless of being former manual setting or automatic the setting)), like the output detection of descending LNA be-6dBm, former settings is 5dB, the ATT value that descending LNA then is set is-6-(10)+5=9dB; Up settings=descending settings; When the settings of obtaining 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 settings (no matter being former manual setting or automatic the setting), the ATT value of up LNA=descending LNA ATT value; Detect like the output of descending LNA and to be-9dBm, former settings 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-(10)+former settings (regardless of being former manual setting or automatic the setting)), like the output detection of descending LNA be-16dBm, former settings is 9dB, the ATT value that descending LNA then is set is-16-(10)+9=3dB; Up settings=descending settings; When the settings of obtaining less than 0 the time, be set to minimum value 0; Detect like the output of descending LNA and to be-16dBm, former settings is 0dB, and the ATT value that descending LNA then is set is-16-(10)+0=-6dB＜0 then up settings=descending settings=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 (second algorithm that promptly prestores) 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 the automatic electric-level module) control
According to the power threshold that is provided with, the ATT of power amplifier is set automatically.Power threshold like 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 (algorithm that promptly prestores) is as follows:
(1), when X＞power threshold+1:
Descending HPA ATT value=(X-(power threshold)+former settings (no matter being former manual setting or automatic the setting)) is 43dBm like the output detection of descending HPA, and former settings is 5dB, and the ATT value that descending HPA then is set is 43-(40)+5=8dB; When the settings of obtaining 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 settings (no matter being former manual setting or automatic the setting), is 39dBm like the output detection of descending HPA, and former settings 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-(10)+former settings (no matter being former manual setting or automatic the setting)) is 36dBm like the output detection of descending LNA, and former settings is 9dB, and the ATT value that descending HPA then is set is 36-(40)+9=5dB; When the settings of obtaining less than 0 the time, be set to minimum value 0; Output detection like descending HPA is 36dBm, and former settings is 0dB, and the ATT value that descending LNA then is set is 36-(40)+0=-4dB＜0, then HPA ATT settings=0; Up method is with descending, so do not give unnecessary details.
Data during down in the face of 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 input power of reality during near the 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 through 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 near the base station time 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/200KH
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 invention and style, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (8)
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 measure downstream signal and automatically adjustment down/gain of up link;
This control unit prestores and corresponding first algorithm of reference value scope of living in and second algorithm corresponding with low noise amplifier pad value scope of living in; In conjunction with this reference value and pairing first algorithm of this reference value; Thereby obtain the concrete pad value of low noise amplifier, and obtain the ascending power thresholding according to the concrete pad value and second algorithm;
And this control unit also prestores downlink or uplink power threshold and the algorithm relevant with the downlink or uplink power threshold with this reference value, and the pad value of this downlink power amplifier calculates according to reference value and algorithm;
Wherein, establish the output level that X is LNA,
Above-mentioned first algorithm is:
(1): when X＞-during 8dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings, when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2): when-12dBm≤X≤-during 8dBm, the ATT value of descending LNA keeps former settings, the ATT value of up LNA=descending LNA ATT value;
(3): when X＜-during 12dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings; When the settings of obtaining less than 0 the time, be set to minimum value 0;
Above-mentioned second algorithm 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;
Above-mentioned algorithm is:
(1), when X＞power threshold+1:
Descending HPA ATT value=(X-(power threshold)+former settings), when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2), when power threshold-1≤X≤power threshold+1:
The ATT value of descending HPA keeps former settings;
(3), when X＜power threshold-1:
Descending HPA ATT value=(X-(10)+former settings), when the settings of obtaining less than 0 the time, be set to minimum value 0;
Up method is with descending;
Wherein, LNA is a low noise amplifier, and ATT is decay, and HPA is a high power amplifier.
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, intermediate amplification module and final stage amplification module with power amplifier; This control unit comprises input detection module, output detection module, automatic electric-level control module and attenuation module; The be coupled input of above-mentioned low noise amplifier and power amplifier of this input detection module; The be coupled output of above-mentioned low noise amplifier and power amplifier of this output detection module; This automatic electric-level control module and attenuation module all are connected in the circuit of above-mentioned low noise amplifier and power amplifier, and 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. like claim 2 or 3 described a kind of repeaters that moving body covers that solve, it is characterized in that this control unit is according to the gain of up link and according to the Gain Automatic adjustment of down link.
5. like 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.
6. a control method that solves the repeater of moving body covering is characterized in that, comprising:
Automatic gain control; Output to the low noise amplifier of down link detects; And obtaining reference value, control unit prestores and corresponding first algorithm of this reference value scope of living in and second algorithm corresponding with low noise amplifier pad value scope of living in, in conjunction with this reference value and pairing first algorithm of this reference value; Thereby obtain the concrete pad value of low noise amplifier, and obtain the ascending power thresholding according to the concrete pad value and second algorithm; And
Automatic electric-level control, this control unit also prestores downlink or uplink power threshold and the algorithm relevant with the downlink or uplink power threshold with this reference value, and the pad value of this downlink power amplifier calculates according to reference value and algorithm;
Wherein, establish the output level that X is LNA,
Above-mentioned first algorithm is:
(1): when X＞-during 8dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings, when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2): when-12dBm≤X≤-during 8dBm, the ATT value of descending LNA keeps former settings, the ATT value of up LNA=descending LNA ATT value;
(3): when X＜-during 12dBm, descending LNA ATT value=(X-(10)+former settings), up settings=descending settings; When the settings of obtaining less than 0 the time, be set to minimum value 0;
Above-mentioned second algorithm 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;
Above-mentioned algorithm is:
(1), when X＞power threshold+1:
Descending HPA ATT value=(X-(power threshold)+former settings), when the settings of obtaining greater than 31 the time, be set to maximum 31;
(2), when power threshold-1≤X≤power threshold+1:
The ATT value of descending HPA keeps former settings;
(3), when X＜power threshold-1:
Descending HPA ATT value=(X-(10)+former settings), when the settings of obtaining less than 0 the time, be set to minimum value 0;
Up method is with descending;
Wherein, LNA is a low noise amplifier, and ATT is decay, and HPA is a high power amplifier.
7. a kind of control method that solves the repeater of moving body covering as claimed in claim 6; It is characterized in that; This low noise amplifier and power amplifier also all are preset with maximum output valve and minimum output valve; When the value through control unit adjustment during greater than maximum, then choosing maximum is currency; When the value through control unit adjustment during less than minimum value, then choosing minimum value is currency.
8. a kind of control method that solves the repeater of moving body covering as claimed in claim 6 is characterized in that the pad value of low noise amplifier is adjusted according to the pad value of low noise amplifier in the down link automatically in the up link.
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| CN103237340A (en) * | 2013-04-24 | 2013-08-07 | 京信通信系统（广州）有限公司 | Automatic level control circuit, method and communication device |
| CN107294591A (en) * | 2017-08-16 | 2017-10-24 | 无锡市日升机械厂 | The mountain-climbing knapsack of built-in signal amplifier |
| CN110034773B (en) * | 2019-03-28 | 2024-02-13 | 南京宽超通信技术有限公司 | Antenna satellite ground station self-adaptive active antenna and adjusting method thereof |
| CN113285747A (en) * | 2021-05-20 | 2021-08-20 | 罗文松 | Repeater for solving mobile body coverage and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0862280A2 (en) * | 1997-02-28 | 1998-09-02 | Nokia Mobile Phones Ltd. | Device and method for detection and reduction of intermodulation distortion in a CDMA receiver |
| CN2819660Y (en) * | 2005-06-27 | 2006-09-20 | 沈阳奥维通信技术有限公司 | Band-width adjusting selecting direct broadcast station for mobile-telecommunication |
| CN201039168Y (en) * | 2007-04-24 | 2008-03-19 | 福建三元达通讯有限公司 | A self-adapted mobile communication repeater |
| CN201639582U (en) * | 2009-11-23 | 2010-11-17 | 福建京奥通信技术有限公司 | Repeater solving mobile object coverage |
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2009
- 2009-11-23 CN CN2009102232958A patent/CN101742631B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0862280A2 (en) * | 1997-02-28 | 1998-09-02 | Nokia Mobile Phones Ltd. | Device and method for detection and reduction of intermodulation distortion in a CDMA receiver |
| CN2819660Y (en) * | 2005-06-27 | 2006-09-20 | 沈阳奥维通信技术有限公司 | Band-width adjusting selecting direct broadcast station for mobile-telecommunication |
| CN201039168Y (en) * | 2007-04-24 | 2008-03-19 | 福建三元达通讯有限公司 | A self-adapted mobile communication repeater |
| CN201639582U (en) * | 2009-11-23 | 2010-11-17 | 福建京奥通信技术有限公司 | Repeater solving mobile object coverage |
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