CN101034930A - WCDMA RF direct amplifying station - Google Patents
WCDMA RF direct amplifying station Download PDFInfo
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- CN101034930A CN101034930A CN 200610024543 CN200610024543A CN101034930A CN 101034930 A CN101034930 A CN 101034930A CN 200610024543 CN200610024543 CN 200610024543 CN 200610024543 A CN200610024543 A CN 200610024543A CN 101034930 A CN101034930 A CN 101034930A
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Abstract
A WCDMA RF Repeater includes switching power supply, downlink anduplink. Downlink composes the base station in order tandem with the launch-duplex mobile-duplex ports and the launch of the downlink ports between low-noise amplifier modules, the downlink channel selector,filter and power amplifier. Uplink composes mobile-duplex serial-port and base stations receiving end of the duplex between the uplink port to receive low-noise amplifier module, the uplink channel selector, power amplifier and a filter; It also includes an intelligent monitoring modules, each module of the control interface the intelligent control with the control module interface connected to the other switching power supply to provide power supply module. It extends the base station signal coverage, has a strong anti-jamming capability, and to prevent their impact on other systems.
Description
Technical field
The present invention relates to a kind of mobile communication radio frequency transmission equipment, particularly a kind of WCDMA RF direct amplifying station.
Background technology
Growing along with mobile communication market professionally developed into value-added service from original voice service.Be accompanied by the continuous development of mobile value-added service, the 3G that marches toward (3rd Generation, 3G (Third Generation) Moblie) then is the inevitable choice of mobile operator.With preceding two generation system compare, the principal character of 3-G (Generation Three mobile communication system) is that colourful mobile multi-media service can be provided, its transmission rate is supported 144kb/s in high-speed mobile environment, walking is supported 384kb/s in the mobile environment at a slow speed, supports 2Mb/s under the inactive state.Its design object is for power system capacity, the better communication quality bigger than second-generation system is provided, and want to realize seamless roam in the world better and, also will consider favorable compatibility simultaneously with existing second-generation system for the user provides the multiple business that comprises speech, data and multimedia etc.
The 3G standard of International Telecommunication Association's acceptance at present mainly contains following three kinds: WCDMA, CDMA2000 and TD-SCDMA.CDMA is the abbreviation of Code Division Multiple Access (code division multiple access), is the technical foundation of 3-G (Generation Three mobile communication system).First generation mobile communication system adopts the analogue modulation system of frequency division multiple access (FDMA), and the major defect of this system is that the availability of frequency spectrum is low, and signaling is disturbed voice service.Second generation mobile communication system mainly adopts the digital modulation mode of time division multiple access (TDMA), improved power system capacity, and adopted independent channel to transmit signaling, systematic function is greatly improved, but the power system capacity of TDMA is still limited, and handover switching performance is imperfection still.Characteristics such as cdma system is simple with its frequency planning, power system capacity is big, frequency reuse is high, ability of anti-multipath is strong, good communication quality, soft capacity, soft handover demonstrate huge development potentiality.
The WCDMA full name is Wideband CDMA, and this is based on the 3G technology standard that the GSM net develops out, is the wideband CDMA technology that Europe proposes.This standard has proposed the evolution strategy of GSM (2G)-GPRS-EDGE-WCDMA (3G).GPRS is the abbreviation of General PacketRadio Service (GPRS), EDGE is the abbreviation of Enhanced Datarate for GSM Evolution (strengthening the GSM evolution of data rate), and these two kinds of technology are called as 2.5 third-generation mobile communication technology.China Mobile has been GPRS network and EDGE network with original GSM network upgrade at present.
The repeater equipment of 2G is by a large amount of utilizations at present, 2G repeater accepted standard is " ETSI EN300 609 ", " repeater specification requirement of 900/1800MHzTDMA digital mobile cellular telecommunication net and method of measurement " and " repeater specification requirement of 800MHzCDMA digital mobile cellular telecommunication net and method of measurement ", and 3G repeater institute accepted standard is " 3GPPTS25.143 " and " repeater specification requirement of WCDMA digital mobile cellular telecommunication net and method of measurement " (declaration original text), standard to 2G repeater and 3G repeater compares, its main difference is: 1, the linearity of 3G repeater requires high, requires very high to spuious control especially.2, the anti-interference requirement of 3G repeater is high.3, the 3G repeater requires height to the adaptability that input signal strength changes.Therefore, the 3G repeater is higher to the technical requirement of internal module, and is stricter, requires to have good inheritability, extensibility, can realize the smooth upgrade of 2G, can carry out collaborative work and carry out the network optimization easily with the mobile communications network core, base station well to 3G.Complete machine has very strong self-protection function, and the work to whole network does not bring negative interference.Simultaneously, do not make complete machine be subjected to fatal damage because the work of certain part in the repeater is undesired yet.
Because electromagnetic loss, each signal of base station coverage is limited; In addition, because the shadow effect of radio transmission, the behind that is directed at some obstacles such as high mountain, building, the woods also often forms covering shadow region and the blind zone problem that large-scale tall buildings things such as signal blind zone and mountain area, villa, highway, tourist district, holiday village, market place builet below the ground, hotel etc. are located.
Summary of the invention
The base station covers not enough in the cellular mobile network in order to remedy, extend base station coverage area, eliminate communication blind district, radio-frequency enabled good, high-fidelity is provided, effectively expand the coverage area, eliminate coverage hole, improve speech quality, lay 3G network for operator and reduce cost, the present invention aims to provide a kind of WCDMA RF direct amplifying station of the WCDMA of being applicable to mobile communication system.
It comprises Switching Power Supply, down link and up link, it is characterized in that described down link is made of descending low noise amplification module 8, down channel selector 9, downstream filter 10 and downlink power amplifier 11 between the emission port of emission port that is connected on base station end duplexer 2 successively and mobile terminal duplexer 3, described up link is made of up low noise amplification module 4, up channel selector 5, upstream filter 6 and the ascending power amplifier 7 between the receiving port of receiving port that is connected on mobile terminal duplexer 3 successively and base station end duplexer 2; It also comprises an intelligent monitored control module 1, the monitor-interface that source module is respectively arranged that comprises up low noise amplification module 4, up channel selector 5, ascending power amplifier 7, descending low noise amplification module 8, down channel selector 9 and downlink power amplifier 11 links to each other with the monitor-interface of this intelligent monitored control module 1 respectively, and Switching Power Supply provides power supply for other each module.
At down link, the downstream signal that receives the base station from antenna enters the BS port, export by its TX end through base station end duplexer 2 backs, send into down channel selector 9 through descending low noise amplification module 8 then, select by down channel selector 9 behind the channel of required amplification by downstream filter 10 input downlink power amplifier 11 by input mobile terminal duplexer 3 behind the linear amplification, be used for coverage hole by the output of MS port at last.In up link, the upward signal that receives mobile phone from antenna enters the MS port, export by its RX port through mobile terminal duplexer 3 backs, send into up channel selector 5 again through up low noise amplification module 4 then, select by up channel selector 5 behind the channel of required amplification by upstream filter 6 input ascending power amplifiers 7, by input base station end duplexer 2 behind the linear amplification of ascending power amplifier 7, export by the BS port of base station end duplexer 2 at last.All source modules that have all have monitor-interface, by monitoring module it are implemented data acquisition and control, finally can be by this locality and the remote monitoring of software realization to equipment.
Equipment designs according to relevant repeater standard and national regulation among the 3GPP, wherein channel selector adopts the frequency of phase locking converter technique (abbreviation frequency converter) of high stability, standard by the every channel bandwidth 3.84MHz of digital mobile communication WCDMA standard designs, and can choose single or multiple channels in whole 60MHz bandwidth wantonly.Equipment has extremely strong signal selective power, and other signals that can suppress in the inoperative channel seal in the repeater, so that the channel of choosing obtains maximum power output, extends the signal of base station coverage.Equipment has very strong antijamming capability, and prevents self influence to other system.
Description of drawings
Fig. 1 is a system configuration schematic diagram of the present invention.
Embodiment
As shown in Figure 1, it comprises Switching Power Supply, down link and up link, it is characterized in that described down link is by the descending low noise amplification module 8 between the emission port of emission port that is connected on base station end duplexer 2 successively and mobile terminal duplexer 3, down channel selector 9, downstream filter 10 and downlink power amplifier 11 constitute, and described up link is by the up low noise amplification module 4 between the receiving port of receiving port that is connected on mobile terminal duplexer 3 successively and base station end duplexer 2, up channel selector 5, upstream filter 6 and ascending power amplifier 7 constitute; It also comprises an intelligent monitored control module 1, the monitor-interface that source module is respectively arranged that comprises up low noise amplification module 4, up channel selector 5, ascending power amplifier 7, descending low noise amplification module 8, down channel selector 9 and downlink power amplifier 11 links to each other with the monitor-interface of this intelligent monitored control module 1 respectively, and Switching Power Supply provides power supply for other each module.
At down link, the downstream signal that receives the base station from antenna enters the BS port, export by its TX end through base station end duplexer 2 backs, send into down channel selector 9 through descending low noise amplification module 8 then, select by down channel selector 9 behind the channel of required amplification by downstream filter 10 input downlink power amplifier 11 by input mobile terminal duplexer 3 behind the linear amplification, be used for coverage hole by the output of MS port at last.In up link, the upward signal that receives mobile phone from antenna enters the MS port, export by its RX port through mobile terminal duplexer 3 backs, send into up channel selector 5 again through up low noise amplification module 4 then, select by up channel selector 5 behind the channel of required amplification by upstream filter 6 input ascending power amplifiers 7, by input base station end duplexer 2 behind the linear amplification of ascending power amplifier 7, export by the BS port of base station end duplexer 2 at last.All source modules that have all have monitor-interface, by monitoring module it are implemented data acquisition and control, finally can be by this locality and the remote monitoring of software realization to equipment.
System index of the present invention can satisfy relevant repeater standard and national regulation among the 3GPP:
The utilization of prime low noise Linear magnifying technology in high in the design of repeater guarantees that the signal that receives amplifies the back and also has good signal-to noise ratio; The lock that adopts high stability in channel selection module is to frequency transform techniques, and the intermediate frequency Surface Acoustic Wave Filter of high inhibition degree, makes system have extremely strong selectivity and anti-interference, and equipment input intermodulation has been made contribution with the index of exporting intermodulation; In the design of repeater, also adopt the multinomial filter of composite type, made system's selectivity good, increased the receive-transmit isolation of equipment.Because in the WCDMA system, pilot power only accounts for 1/10th of whole power output, causes the variation of input power of WCDMA repeater quite big.Have the ALC controlled function in the low noise amplification module of this equipment, and place before the channel selector, guarantee that the signal strength signal intensity that enters channel selector can meet the demands fully.The sort circuit scheme can make the spuious index of WCDMA repeater and intermodulation can not change because of the intensity of input signal, has guaranteed the technical parameter of WCDMA complete machine.
In some applied environment, because a large amount of existence of PHS, its downstream frequency is 1910MHz ~ 1915MHz, only differ 5MHz with the least significant end of 2GHz WCDMA upstream frequency 1920MHz ~ 1980MHz, if 2GHz WCDMA direct end uplink channel does not have very high inhibition to the PHS downstream signal, as this repeater and PHS altogether during the location, because the strength ratio upward signal of downstream signal is big, can cause direct end uplink to get clogged, to making the repeater cisco unity malfunction.The WCDMA repeater technology overall plan that the present invention works in 2GHz at first has been concerned about this problem, the mobile terminal duplexer adopts the asymmetry high-band high Q value of degree of inhibition duplexer outward, this duplexer adopts the coaxial cavity filtered version, 15 grades of filter order, sideband suppression is high, the average power that can pass through is 100W, and peak power reaches 200W;
Because the nonlinear distortion of radio-frequency power amplifier can make it produce new frequency component, as producing second harmonic and double-tone beat frequency for second-order distortion, can produce triple-frequency harmonics and multitone beat frequency for third order distortion.These new frequency components will be disturbed the signal of other frequency ranges as dropping in the passband.So the WCDMA repeater is very high to the requirement of the linearity, in order to satisfy this class index request, takes into account linearity and efficient simultaneously, the present invention carries out linearization process to power amplifier, and the mode of utilization back-off and predistortion is carried out.Power tube that will more high-power (as 80W) is used for the power amplifier module of smaller power (as 16W), the 1dB compression point of power tube 10 decibels of having drawn back, makes the work of amplifirer enter linear zone away from the saturation region like this.Simultaneously, the predistortion linear technology is applied on the power amplifier, and the device that has added predistortion at the front end of power amplifier module is handled, in order to the nonlinear distortion of compensation power amplifier, improve the linearisation degree of multi-carrier power amplifier greatly, also effectively improved the spurious emissions index of power amplifier simultaneously.
Select for use high stability crystal oscillator as frequency reference, guarantee that whole system frequency reference Deviation Control is at very low range.Equipment is made of the reflective module of series connection; the input/output port of module is from capacitive character and inductive mutual compensation control port standing wave of high-frequency circuit; part has the port of source module to add isolator; to improve matching and to protect related device; mutually coupling makes the standing wave of equipment functional, make various microwave signals in the POI system as far as possible to go the state transfer of ripple.Prime adopts the low noise Linear magnifying technology in high in the design of repeater, guarantees the noise factor≤5dB of complete machine; In channel selection module, selected the intermediate frequency Surface Acoustic Wave Filter of high inhibition degree for use, make system have extremely strong selectivity and anti-interference, equipment reaches 45dB in the inhibition that departs from channel marginal frequency ± 0.78MHz place, the band that the has guaranteed equipment index that gains outward, promptly during the signal outside the repeater receives working range, its amplifying power is subjected to suitable restriction, can not form useful signal and disturb.Index contribution for the input intermodulation is huge, particularly is the interference signal of 921-960MHz or 1805-1880dBm for frequency, and when the intensity of input reached 16dBm, it was to the interference effect≤10dB in the band of repeater.The equipment that guaranteed so can not be subjected to the influence of GSM/DCS signal when being total to the location with the GSM/DCS system.In channel is selected module, used the high stability crystal oscillator as the frequency reference benchmark, guaranteed the frequency error of repeater≤± 0.01ppm; Owing to have the ALC function in the WCDMA low noise amplification module, and in system, place channel to select before the module, so after input signal changes, owing to drive the ALC function in the amplification module, tractor parameter enters channel and selects the signal strength signal intensity of module not change, so also can not change.Particularly for spuious index, in the ordinary course of things, spuious parameter obviously worsens along with the increase of input signal, but in this equipment, input signal increases 10dB, and stray parameter does not have to change substantially.Adopted degree of inhibition duplexer outside the asymmetry high-band at the MS end, because the progression of coaxial cavity is high especially, low side departs from the inhibition Du Keda 25dB of sideband 5MHz, can effectively suppress the downstream signal of PHS, has solved abnormal problem of working when conventional WCDMA repeater and PHS are total to the location.The linearization problem of multi-carrier power amplifier also is a difficult problem in the WCDMA repeater, in order to solve this difficult problem, the present invention has increased the linearisation predistortion processing circuit in the power amplifier module of WCDMA repeater, thereby solved the linearization problem of multi-carrier power amplifier preferably, obtained multicarrier linear power amplifier preferably.Guarantee that when 2 carrier waves and 3 carrier waves are worked simultaneously the spurious emissions index of power amplifier can satisfy the requirement of 3GPP intermediate frequency spectrum emission template fully.
Its key is: the power tube work of ascending power amplifier 7 and downlink power amplifier 11 enters linear zone away from the saturation region, and its front end has added the device of predistortion.More powerful power tube is used for the power amplifier module of smaller power in the power amplifier, the 1dB compression point of power tube 10 decibels of having drawn back.The mobile terminal duplexer adopts the asymmetry high-band high Q value of degree of inhibition duplexer outward, and this duplexer adopts the coaxial cavity filtered version, and 15 grades of filter order have high sideband suppression, and the average power that can pass through is 100W, and peak power reaches 200W.Descending low noise amplification module 8 and up low noise amplification module 4 place respectively before down channel selector 9 and the up channel selector 5, and increase the ALC controlled function therein.
Claims (5)
1, a kind of WCDMA RF direct amplifying station, it comprises Switching Power Supply, down link and up link, it is characterized in that: described down link is by the descending low noise amplification module (8) between emission port that is connected on base station end duplexer (2) successively and the mobile terminal duplexer (3), down channel selector (9), downstream filter (10) and downlink power amplifier (11) constitute, and described up link is by the up low noise amplification module (4) between receiving port that is connected on mobile terminal duplexer (3) successively and the base station end duplexer (2), up channel selector (5), upstream filter (6) and ascending power amplifier (7) constitute; It also comprises an intelligent monitored control module (1), the monitor-interface that source module is respectively arranged that comprises up low noise amplification module (4), up channel selector (5), ascending power amplifier (7), descending low noise amplification module (8), down channel selector (9) and downlink power amplifier (11) links to each other with the monitor-interface of this intelligent monitored control module (1) respectively, and Switching Power Supply provides power supply for other each module.
2, a kind of WCDMA RF direct amplifying station as claimed in claim 1 is characterized in that: the power tube work of described ascending power amplifier (7) and downlink power amplifier (11) enter linear zone, and its front end has added the device of predistortion away from the saturation region.
3, as a kind of WCDMA RF direct amplifying station of claim 1 or 2, it is characterized in that: described ascending power amplifier (7) and downlink power amplifier (11) use more powerful power tube to be used for the power amplifier module of smaller power, the 1dB compression point of power tube 10 decibels of having drawn back.
4, as a kind of WCDMA RF direct amplifying station of claim 1 or 2, it is characterized in that: described mobile terminal duplexer (3) adopts the asymmetry high-band high Q value of degree of inhibition duplexer outward, this duplexer adopts the coaxial cavity filtered version, 15 grades of filter order, has high sideband suppression, the average power that can pass through is 100W, and peak power reaches 200W.
5, as a kind of WCDMA RF direct amplifying station of claim 1 or 2, it is characterized in that: described descending low noise amplification module (8) and up low noise amplification module (4) place down channel selector (9) and up channel selector (5) respectively before, and increase the ALC controlled function therein.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610024543 CN101034930A (en) | 2006-03-09 | 2006-03-09 | WCDMA RF direct amplifying station |
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| CN 200610024543 CN101034930A (en) | 2006-03-09 | 2006-03-09 | WCDMA RF direct amplifying station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104393A (en) * | 2009-12-16 | 2011-06-22 | 天津海泰超导电子有限公司 | FDD (Frequency Division Duplex) high-temperature superconducting RF (Radio Frequency) front end subsystem |
| CN102801458A (en) * | 2012-01-18 | 2012-11-28 | 福建京奥通信技术有限公司 | Intelligent frequency-hopping repeater |
| CN101547037B (en) * | 2008-03-25 | 2012-12-19 | 京信通信系统（中国）有限公司 | GSM digital wireless repeater and method for shutting off time slot of uplink carrier wave |
| CN104467884A (en) * | 2014-12-15 | 2015-03-25 | 科大智能（合肥）科技有限公司 | General type 10.7-11.8 GHz full outdoor broadband IP digital microwave radio frequency unit |
-
2006
- 2006-03-09 CN CN 200610024543 patent/CN101034930A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101547037B (en) * | 2008-03-25 | 2012-12-19 | 京信通信系统（中国）有限公司 | GSM digital wireless repeater and method for shutting off time slot of uplink carrier wave |
| CN102104393A (en) * | 2009-12-16 | 2011-06-22 | 天津海泰超导电子有限公司 | FDD (Frequency Division Duplex) high-temperature superconducting RF (Radio Frequency) front end subsystem |
| CN102801458A (en) * | 2012-01-18 | 2012-11-28 | 福建京奥通信技术有限公司 | Intelligent frequency-hopping repeater |
| CN102801458B (en) * | 2012-01-18 | 2014-12-24 | 福建京奥通信技术有限公司 | Intelligent frequency-hopping repeater |
| CN104467884A (en) * | 2014-12-15 | 2015-03-25 | 科大智能（合肥）科技有限公司 | General type 10.7-11.8 GHz full outdoor broadband IP digital microwave radio frequency unit |
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Open date: 20070912 |