CN201222735Y - Digital radio frequency zooming system with shifting working passband - Google Patents
Digital radio frequency zooming system with shifting working passband Download PDFInfo
- Publication number
- CN201222735Y CN201222735Y CNU2008200480795U CN200820048079U CN201222735Y CN 201222735 Y CN201222735 Y CN 201222735Y CN U2008200480795 U CNU2008200480795 U CN U2008200480795U CN 200820048079 U CN200820048079 U CN 200820048079U CN 201222735 Y CN201222735 Y CN 201222735Y
- Authority
- CN
- China
- Prior art keywords
- module
- digital
- signal
- conversion
- analog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The utility model discloses a digital radio remote system whose work passbands are removable, which comprises a digital accessing control unit and a digital radio remote unit, and monitoring host computer modules are arranged in both of the digital accessing control unit and the digital radio remote unit and are used for calculating the central communication channel numbers which are corresponding to the new work passbands of the new work passband parameters which are preset by the monitoring host computer modules through utilizing external devices, a monitoring slave module is correspondingly arranged on each of local oscillation modules which are arranged in an up-chain and a down-chain, and the monitoring slave modules are used for further calculating the new local oscillation frequency of the corresponding local oscillation modules through utilizing the central communication channel numbers which are obtained through calculation of the monitoring host computer modules. The utility model has the advantages that: firstly, the local oscillation of each local oscillation module is controlled through each of the monitoring slave module through utilizing the monitoring host computer modules of the digital accessing control unit and the digital radio remote unit according to the changing of the work passbands, which enables the upgoing work passbands and the downgoing work passbands to realize the integral motion, and secondly, the costs of materials and production are reduced.
Description
[technical field]
The utility model relates to mobile communication digital radio frequency remote technology, relates in particular to the digital RF far-drawing system that a kind of working passband can move.
[technical background]
Operator can move communication channel according to the requirement that covers, to satisfy the covering requirement of system in the actual covering of mobile communications network.But traditional digital RF far-drawing system is the mentality of designing of core with hardware based on the conventional wireless electricity, adopt specific hardware to realize the communication channel selection function of fixing in practice, different channels adopts relevant hardware, makes system equipment hardware and function solidify.After the demand communication channel design of digital RF far-drawing system, produce according to client's appointment, this equipment can only be applicable to the occasion of this specific communication channel, just can meet the demands and must change its internal hardware circuit when being used in the occasion of all the other different communication channels.Traditional thus digital RF far-drawing system is owing to adopt traditional mentality of designing that does not have portability, cause on the one hand in actual use, adjust communication channel owing to can not cover on-the-spot requirement according to reality, be difficult to better satisfy requirement of client, applicability is relatively poor, on the other hand because the curing of system hardware and function, for production firm, need purchase particular device and produce debugging according to client's demand arrangement, cause purchase cost and production cost to raise.
[utility model content]
For this reason, the purpose of this utility model will overcome above-mentioned deficiency exactly, the digital RF far-drawing system that provides a kind of working passband to move.
For realizing this purpose, the utility model adopts following technical scheme:
The digital RF far-drawing system that working passband of the present utility model can move, comprise digital access control unit and digital radio frequency far-pulling unit, form up link and down link by digital access control unit and digital radio frequency far-pulling unit, be used to produce the local oscillator module that local frequency changes the working passband of up link and down link thereby in up link that belongs to digital access control unit and down link, all include:
Be equipped with the monitoring host computer module in described digital access control unit and the digital radio frequency far-pulling unit, be used to utilize external equipment to its default new working passband calculation of parameter to the central channel of new working passband number;
Corresponding each local oscillator module is provided with a monitoring slave module, is used to utilize central channel that the monitoring main modular calculates number further to calculate the new local frequency of corresponding local oscillator module and act on this local oscillator module.
In the described up link, comprise the low noise amplification module, analog down module, the analog-to-digital conversion module that belong to the digital radio frequency far-pulling unit, Digital Down Converter Module, uplink baseband processing module, light are sent out module, with comprise the light that belongs to digital access control unit and receive module, uplink baseband processing module, Digital Up Convert module, D/A converter module, simulation up-conversion module;
In the digital radio frequency far-pulling unit, upward signal is after the low noise amplification module amplifies, be downconverted into analog intermediate frequency signal through the analog down module, convert number format to through analog-to-digital conversion module, further downconvert to baseband signal through Digital Down Converter Module, after carrying out Data Format Transform by the uplink baseband processing module, send out module converts by light again and become light signal to send through optical fiber;
In digital access control unit, after light receipts module is obtained upward signal via optical fiber, convert thereof into the signal of telecommunication to after up baseband processing module finishes Data Format Transform, by Digital Up Convert module up-conversion to digital medium-frequency signal, convert analog signal to through D/A converter module again, after simulation up-conversion module converts is that radiofrequency signal is sent to the base station;
Described analog down module, simulation up-conversion module, Digital Down Converter Module, Digital Up Convert module all electrically connect with a described local oscillator module.
In the described down link, comprise the analog down module, the analog-to-digital conversion module that belong to digital access control unit, Digital Down Converter Module, downgoing baseband processing module, light are sent out module, with comprise the light that belongs to the digital radio frequency far-pulling unit and receive module, downgoing baseband processing module, Digital Up Convert module, D/A converter module, simulation up-conversion module and power amplifier module;
In digital access control unit, downstream signal is downconverted into analog intermediate frequency signal through the analog down module, convert number format to through analog-to-digital conversion module, further downconvert to baseband signal through Digital Down Converter Module, after carrying out Data Format Transform by the uplink baseband processing module, send out module converts by light again and become light signal to send through optical fiber;
In digital access control unit, after light receipts module is obtained downstream signal via optical fiber, convert thereof into after the signal of telecommunication to downgoing baseband processing module finishes Data Format Transform, by Digital Up Convert module up-conversion to digital medium-frequency signal, convert analog signal to through D/A converter module again, be radiofrequency signal through simulation up-conversion module converts again, behind the power amplifier module amplifying signal, be sent to antenna-feedback system again and finish covering;
Described analog down module, simulation up-conversion module, Digital Down Converter Module, Digital Up Convert module all electrically connect with a described local oscillator module.
Described analog down module and simulation up-conversion module include frequency mixer submodule and described local oscillator module and described monitoring slave module, the local frequency that the frequency mixer submodule utilizes the local oscillator module to provide is carried out frequency conversion, and the local oscillator module is then obtained central channel number from monitoring slave module.
Described Digital Down Converter Module and Digital Up Convert module include digital mixer and as the numerically-controlled oscillator of described local oscillator module, the local frequency that digital mixer utilizes numerically-controlled oscillator to provide is carried out frequency conversion, and numerically-controlled oscillator then obtains central channel number as the local oscillator module from a monitoring slave module.
The uplink baseband processing module of described digital access control unit comprises data transaction submodule and digital filter submodule, the data transaction submodule carries out data transaction with digital baseband signal, the digital filter submodule is then accepted the control of a monitoring slave module, finishes the filtering work to baseband signal.
The downgoing baseband processing module of described digital radio frequency far-pulling unit comprises data transaction submodule and digital filter submodule, the data transaction submodule carries out data transaction with digital baseband signal, the digital filter submodule is then accepted the control of a monitoring slave module, finishes the filtering work to baseband signal.
Compared with prior art, the utility model possesses following advantage: at first, the utility model utilizes the variation of the monitoring host computer module of digital access control unit and digital radio frequency far-pulling unit according to working passband, local frequency by each the local oscillator module in each monitoring slave module controls simulation frequency-variable module, make the uplink and downlink working passband realize integral shift, produce corresponding digital local oscillation signal by each numerically-controlled oscillator of control simultaneously, make that the uplink and downlink working channel takes place to move accordingly; Realized thus when client's bandwidth demand changes, only needed to change monitoring host computer modules configured data, need not to change hardware, made native system have more applicability like this at the covering scene.Secondly, this design can be adopted the higher hardware of versatility, can adopt centralized purchasing for production firm, has reduced material cost and production cost.
[description of drawings]
Fig. 1 is the theory diagram of the utility model digital RF far-drawing system.
Fig. 2 is the theory diagram of the descending digital module in digital access control unit that adopts of the utility model.
Fig. 3 is the theory diagram of the descending Digital Down Converter Module that adopts of the utility model.
Fig. 4 is the theory diagram of the descending analog down module that adopts of the utility model.
Fig. 5 is the theory diagram of the descending digital module in digital radio frequency far-pulling unit that adopts of the utility model.
Fig. 6 is the theory diagram of the descending Digital Up Convert module that adopts of the utility model.
Fig. 7 is the theory diagram of the digital filter submodule that adopts of the utility model.
Fig. 8 is the theory diagram of the descending simulation up-conversion module that adopts of the utility model.
Fig. 9 is the theory diagram of the upstream digital down conversion module that adopts of the utility model.
Figure 10 is the theory diagram of the digital radio frequency far-pulling unit upstream digital module that adopts of the utility model.
Figure 11 is the theory diagram of the up analog down module that adopts of the utility model.
Figure 12 is the theory diagram of the upstream digital up-conversion module that adopts of the utility model.
Figure 13 is the theory diagram of the digital access control unit upstream digital module that adopts of the utility model.
Figure 14 is the theory diagram of the up simulation up-conversion module that adopts of the utility model.
Figure 15 is the theory diagram of the digital filter submodule that adopts of the utility model.
[embodiment]
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail.
Fig. 1～Figure 15 shows concrete structure of the present utility model.By above-mentioned figure as seen, this digital radio frequency stretch system comprises digital access control unit, digital radio frequency far-pulling unit, and digital access control unit is connected with mobile communication base station 01 by coupler 02; Numeral access control unit links to each other by optical fiber with the digital radio frequency far-pulling unit, forms the up link and the down link of signal transmission; Between numeral access control unit and the digital radio frequency far-pulling unit is master-salve station communication.
Described digital access control unit comprises duplexer 11, descending analog down module 12, descending digital module 13, up simulation up-conversion module 14, upstream digital module 15, control unit monitoring host computer module 16;
Consult Fig. 4, the descending analog down module 12 of described Fig. 1 comprises frequency mixer submodule 121, local oscillator module 122, descending frequency conversion monitoring slave module 123;
Consult Fig. 2, the descending digital module 13 of described Fig. 1 comprises that analog-to-digital conversion module 131, descending Digital Down Converter Module 132, downgoing baseband processing module 133, light are sent out module 134, descending digiboard is monitored slave module 135; As shown in Figure 3, described descending Digital Down Converter Module 132 comprises descending down-conversion digital mixer 1321 and descending down-conversion numerically-controlled oscillator 1322;
See also Figure 14, described up simulation up-conversion module comprises frequency mixer submodule 141, local oscillator module 142, up frequency conversion monitoring slave module 143;
As shown in figure 13, upstream digital module 15 comprises light receipts module 151, uplink baseband processing module 152, upstream digital up-conversion module 153, D/A converter module 154, upstream digital board monitoring slave module 155 among described Fig. 1; As shown in figure 12, described upstream digital up-conversion module 153 comprises up up-conversion digital mixer 1531 and the up up-conversion numerically-controlled oscillator 1532 of near-end;
Among Figure 13, described uplink baseband processing module 152 comprises data transaction submodule 156, digital filter submodule 157; As shown in figure 15, described digital filter submodule 157 comprises filter submodule 1571 and function sub-modules 1572;
Described near-end duplexer 11 is connected with up simulation up-conversion module 14 simultaneously with descending analog down module 12 simultaneously, descending analog down module is connected with descending digital module 13, and described up simulation up-conversion module 14 is connected 15 with the upstream digital module;
Frequency mixer submodule 121 is connected with local oscillator module 122 in the described descending simulation up-conversion module 12, and descending frequency conversion monitoring slave module 123 is connected with local oscillator module 122 by data wire;
Analog-to-digital conversion module 131, descending Digital Down Converter Module 132, downgoing baseband processing module 133, light are sent out module 134 and are connected successively in the described descending digital module 13, and descending digiboard monitoring slave module 135 is by the descending down-conversion numerically-controlled oscillator 1322 in data wire and the descending Digital Down Converter Module 132;
Frequency mixer submodule 141 is connected with local oscillator module 142 in the described up simulation up-conversion module 14, and up frequency conversion monitoring slave module 143 is connected with local oscillator module 142 by data wire;
Light receipts module 151, uplink baseband processing module 152, upstream digital up-conversion module 153, D/A converter module 154 connect successively in the described upstream digital module 15, data transaction submodule 156 is connected successively with digital filter submodule 157 in the uplink baseband processing module 152, and upstream digital board monitoring slave module 155 is connected with digital filter submodule 157 in the uplink baseband processing module 152 by the up up-conversion numerically-controlled oscillator 1532 in data wire and the upstream digital up-conversion module 153.
Described control unit monitoring host computer module 16 is monitored slave module 143 with the descending frequency conversion monitoring slave module 123 in the descending analog down module 12 with the up frequency conversion in the up simulation up-conversion module 14 by data wire and is connected;
Consult Fig. 1, described digital radio frequency far-pulling unit comprises descending digital module 21, descending simulation up-conversion module 22, power amplifier module 23, duplexer 27, low noise amplification module 26, up analog down module 25, upstream digital module 24, extension unit monitoring host computer module 28;
As shown in Figure 8, described descending simulation up-conversion module 22 comprises frequency mixer submodule 221, local oscillator module 222, descending frequency conversion monitoring slave module 223;
As shown in Figure 5, described descending digital module 21 comprises light receipts module 211, downgoing baseband processing module 212, descending Digital Up Convert module 213, D/A converter module 214, descending digiboard monitoring slave module 215; As shown in Figure 6, described descending Digital Up Convert module 213 comprises descending up-conversion digital mixer 2131 and descending up-conversion numerically-controlled oscillator 2132;
As shown in Figure 5, described downgoing baseband processing module 212 comprises data transaction submodule 216, digital filter submodule 217; As shown in Figure 7, described digital filter submodule 217 comprises filter submodule 2171 and function sub-modules 2172;
As Figure 11, the up analog down module 25 among Fig. 1 comprises frequency mixer submodule 251, local oscillator module 252, up frequency conversion monitoring slave module 253;
As shown in figure 10, described upstream digital module 24 comprises that analog-to-digital conversion module 241, upstream digital down conversion module 242, uplink baseband processing module 243, light sends out module 244, upstream digital board monitoring slave module 245;
As shown in Figure 9, described upstream digital down conversion module 242 comprises up down-conversion digital mixer 2421 and up down-conversion numerically-controlled oscillator 2422;
Consult Fig. 1, described descending digital module 21 is connected with power amplifier module 23 by descending simulation up-conversion module 22, duplexer 27 is connected with low noise amplification module 26 with power amplifier module 23 simultaneously, and low noise amplification module 26 is connected with upstream digital module 24 by up analog down module 25
Frequency mixer submodule 221 is connected with local oscillator module 222 in the described descending simulation up-conversion module 22, and descending frequency conversion monitoring slave module 223 is connected with local oscillator module 222 by data wire;
Frequency mixer submodule 251 is connected with local oscillator module 252 in the described up frequency-variable module 25, and up frequency conversion monitoring slave module 253 is connected with local oscillator module 252 by data wire;
Analog-to-digital conversion module 241, upstream digital down conversion module 242, uplink baseband processing module 243, light are sent out module 244 and are connected successively in the described upstream digital module 24, and upstream digital board monitoring slave module 245 is connected with up down-conversion numerically-controlled oscillator 2422 in the upstream digital down conversion module 242 by data wire;
Described extension unit monitoring host computer module 28 is monitored slave module 253 with the descending frequency conversion monitoring slave module 223 in the descending simulation up-conversion module 22 with the up frequency conversion in the up analog down module 25 by data wire and is connected.
The signal that mobile communication base station 01 produces is sent to the duplexer 11 of digital access control unit by coupler 02, duplexer 11 is isolated downlink radio-frequency signal, the local oscillation signal that the local oscillator module 122 of downlink radio-frequency signal and descending analog down module 12 produces becomes analog if signal after the mixing in frequency mixer submodule 121, this analog signal can be broadband signal, also can be multi-carrier signal;
Become digital medium-frequency signal after the modulus sampling of analog if signal through the analog-to-digital conversion module 131 in the descending digital module 13;
The digital local oscillation signal that digital medium-frequency signal and descending down-conversion numerically-controlled oscillator 1322 produces in descending down-conversion digital mixer place down-conversion 1321 to descending digital baseband signal;
Be packaged into the transmission signals that is fit to standard interface protocol after the Data Format Transform of this digital baseband signal through data transaction submodule 137 in the downgoing baseband processing module 133, send out module 134 through light again and be modulated to light signal is sent to the digital radio frequency far-pulling unit by optical fiber descending digital module 21;
The light of light signal in descending digital module 21 is received module 211 and is demodulated transmission signals, through the Data Format Transform of data transaction submodule 216 and the filter shape of digital filter submodule 217, is reduced to the digital baseband signal with certain bandwidth;
The digital local oscillation signal that digital baseband signal and descending up-conversion numerically-controlled oscillator 2132 produces in descending up-conversion digital mixer 2131 place's up-conversions to digital medium-frequency signal;
Digital medium-frequency signal is touched the analog if signal that conversion reverts to respective bandwidth through the number of D/A converter module 214;
The local oscillation signal that local oscillator module 222 in analog if signal and the descending simulation up-conversion module 22 produces reduces after the mixing in frequency mixer submodule 221 becomes downlink radio-frequency signal, and 23 amplifications of downlink radio-frequency signal process power amplifier module and duplexer 27 output to cover antenna 03 and be transmitted into the interior travelling carriage (mobile phone) of the area of coverage;
More than be that downstream signal covers principle, just opposite for its transfer process of upward signal.
The signal that travelling carriage (mobile phone) in the overlay area sends, receive and duplexer 27 by cover antenna 03, isolate up radiofrequency signal, radiofrequency signal is through the amplification of low noise amplification module 26, in up analog down module 25, the local oscillation signal that the local oscillator module 252 of up radiofrequency signal and up analog down module 25 produces becomes analog if signal after the mixing in frequency mixer submodule 251, this analog signal can be broadband signal, also can be multi-carrier signal;
Become digital medium-frequency signal after the modulus sampling of analog if signal through the analog-to-digital conversion module 241 in the upstream digital module 24;
The digital local oscillation signal that digital medium-frequency signal and up down-conversion numerically-controlled oscillator 2422 produce downconverts to the upstream digital baseband signal at up down-conversion digital mixer 2421 places; Be packaged into the transmission signals that is fit to standard interface protocol after the Data Format Transform of baseband signal through data transaction submodule 247, send out module 244 through light again and be modulated to light signal is sent to digital access control unit by optical fiber upstream digital module 15;
The light of light signal in descending digital module 15 is received module 151 and is demodulated transmission signals, through the Data Format Transform of data transaction submodule 156 and the filter shape of digital filter submodule 157, is reduced to the digital baseband signal with certain bandwidth;
The digital local oscillation signal that digital baseband signal and up up-conversion numerically-controlled oscillator 1532 produces in up up-conversion digital mixer 1531 place's up-conversions to digital medium-frequency signal;
Digital medium-frequency signal is touched the analog if signal that conversion reverts to respective bandwidth through the number of D/A converter module 154;
The local oscillation signal that local oscillator module 142 in analog if signal and the up analog down module 14 produces reduces after 141 mixing of frequency mixer submodule and becomes up radiofrequency signal, and up radiofrequency signal transfers to mobile communication base station 01 through duplexer 11 with signal.
Complex chart 1 is to Figure 15, the utility model effect flow process and principle are: after digital RF far-drawing system of the present utility model works on power, numeral access control unit and the work of digital radio frequency far-pulling units synchronization, master-salve station communication between the two is normal, and control unit monitoring host computer module 16 and extension unit monitoring host computer module 28 are by the mutual transmission monitoring information of optical fiber.Monitor main simulation and can carry out setting, so that the monitoring host computer module is made the calculating of central channel number in view of the above by the external equipment of computer and so on about new working passband.
In the digital RF far-drawing system course of work of the present utility model, changes in demand according to client (operator), working passband is moved, then in down link, control unit monitoring host computer module 16 is according to the changes in demand of operator, according to specific algorithm, calculate the central channel f0 that changes the back working passband, send this central channel f0 data to the descending frequency conversion monitoring slave module 123 of near-end and descending digiboard monitoring slave module 135 by data wire, 123 required corresponding local frequency f1 of the local oscillator module 122 corresponding local oscillation signals of generation that go out descending analog down module 12 this moment according to algorithm computation of descending frequency conversion monitoring slave module, this local oscillation signal and downlink radio-frequency signal are at frequency mixer submodule 121 places mixing output analog if signal, thus the integral shift of realization working passband;
Descending digiboard monitoring slave module 135 is according to central channel f0, utilize algorithm computation to go out the required digital local frequency f2 of each carrier down-conversion in the descending down-conversion numerically-controlled oscillator 1322 corresponding working passbands, descending digital medium-frequency signal and this numeral local oscillation signal go out the downgoing baseband signal in the descending down-conversion digital mixer 1321 places mixing of near-end, the corresponding variation takes place in the interior carrier wave of working passband this moment, and promptly working channel takes place by moving of correspondence;
The control unit monitoring host computer module 16 of numeral access control unit moves the monitor message of variation with working passband, and promptly the working passband parameter of Bian Huaing is sent to the extension unit monitoring host computer module 28 of digital radio frequency far-pulling unit by optical fiber by master-salve station communication; The synchronous variation of extension unit monitoring host computer module 28 then according to this working passband, according to specific algorithm, also calculate the central channel f0 that changes the back working passband, send this central channel f0 to the descending frequency conversion monitoring slave module 223 of far-end and descending digiboard monitoring slave module 215 by data wire, also send the bandwidth of operation parameter to the descending digiboard monitoring of far-end slave module 215 by data wire simultaneously; Descending digiboard monitoring slave module 215 is according to central channel f0, utilize algorithm computation to go out the required digital local frequency f2 of each carrier wave up-conversion in the descending up-conversion numerically-controlled oscillator 2132 corresponding working passbands, downgoing baseband signal and this numeral local oscillation signal recover descending digital medium-frequency signal after descending up-conversion digital mixer 2131 places mixing, the corresponding variation takes place in the interior carrier wave of working passband this moment, and promptly working channel takes place by moving of correspondence; Simultaneously descending digiboard monitoring slave module 215 sends the bandwidth of operation parameter to the filter submodule 2171 in the digital filter submodule 217 of downgoing baseband processing module 212 simultaneously by data wire, make the pass band width of this filter submodule 2171 corresponding, further guarantee the accurate of down link bandwidth of operation with the bandwidth of operation that customer demand changes.
Descending frequency conversion monitoring slave module 223 then goes out the required corresponding local frequency f1 of the local oscillator module 222 corresponding local oscillation signals of generation of descending simulation up-conversion module 22 this moment according to algorithm computation, this local oscillation signal and descending analog if signal are realized the integral shift of working passband at frequency mixer submodule 221 places mixing output downlink radio-frequency signal in the digital radio frequency far-pulling unit;
And in up link, the monitor message that the working passband that the extension unit monitoring host computer module 28 of digital radio frequency far-pulling unit transmits by master-salve station communication according to the control unit monitoring host computer module 16 of digital access control unit changes, according to specific algorithm, the synchronous central channel f0 that calculates variation back down link working passband, send this central channel f0 to the up frequency conversion monitoring slave module 253 of far-end and upstream digital board monitoring slave module 245 by data wire, 253 central channel f3 that go out up link correspondence this moment according to algorithm computation of up frequency conversion monitoring slave module, go out the required corresponding local frequency f4 of the local oscillator module 252 corresponding local oscillation signals of generation of up analog down module 25 again according to algorithm computation, this local oscillation signal and up radiofrequency signal are at frequency mixer submodule 251 places mixing output analog if signal, thus the integral shift of realization working passband;
Upstream digital board monitoring slave module 245 is according to central channel f3, utilize algorithm computation to go out the required digital local frequency f5 of each carrier down-conversion in the corresponding working passband of up down-conversion numerically-controlled oscillator, upstream digital intermediate-freuqncy signal and this numeral local oscillation signal go out the downgoing baseband signal in up down-conversion digital mixer 2421 places mixing, make the carrier wave in the working passband that corresponding the variation be taken place, promptly corresponding moving takes place in working channel;
And in digital access control unit, control unit monitoring host computer module 16 is synchronous passes through data wire and should send up frequency conversion monitoring slave module 143 and upstream digital board monitoring slave module 155 to by descending central channel f0, upstream digital board monitoring slave module 155 is according to central channel f3, utilize algorithm computation to go out the required digital local frequency f5 of each carrier wave up-conversion in the up up-conversion numerically-controlled oscillator 1532 corresponding working passbands, uplink baseband signal and this numeral local oscillation signal recover descending digital medium-frequency signal after up up-conversion digital mixer 1531 places mixing, make the carrier wave in the working passband that corresponding the variation be taken place, promptly corresponding moving takes place in working channel; The slave of upstream digital board monitoring simultaneously module 155 sends the bandwidth of operation parameter to the filter submodule 1571 in the digital filter submodule 157 of near-end uplink baseband processing module 152 simultaneously by data wire, make the pass band width of this filter submodule 1571 corresponding, further guarantee the accurate of up link bandwidth of operation with the bandwidth of operation that customer demand changes;
Up frequency conversion monitoring slave module 143 then goes out the required corresponding local frequency f1 of the local oscillator module 142 corresponding local oscillation signals of generation of up simulation up-conversion module 14 this moment according to algorithm computation, this local oscillation signal and up analog if signal are exported up radiofrequency signal in the 141 places mixing of frequency mixer submodule, realize the integral shift of up link working passband in digital access control unit;
In descending digital module 13 of the present utility model, described downgoing baseband processing module 133 is integrated in a FPGA or the dsp chip; Analog-to-digital conversion module 131 in the described descending digital module 13 can be suitable for special chip respectively with descending digiboard down-conversion submodule 132 and realize, the special chip that also can use a slice to have analog-digital conversion function and Digital Down Convert function simultaneously realizes, also can be that descending Digital Down Converter Module 132 is integrated in FPGA or dsp chip and analog-to-digital conversion module (131) still uses special chip; Described descending digiboard monitoring slave module 135 can use special chip to realize.
In upstream digital module 15 of the present utility model, described uplink baseband processing module 152 is integrated in a FPGA or the dsp chip; D/A converter module 154 in the described upstream digital module 15 can be suitable for special chip respectively with near-end upstream digital up-conversion module 153 and realize, the special chip that also can use a slice to have digital-to-analogue conversion function and Digital Up Convert function simultaneously realizes, also can be that upstream digital up-conversion module 153 is integrated in FPGA or dsp chip and D/A converter module 154 is still used special chip; Described upstream digital board monitoring slave module 155 can use special chip to realize.
In descending digital module 21 of the present utility model, described downgoing baseband processing module 212 is integrated in a FPGA or the dsp chip; D/A converter module 214 in the described descending digital module 21 can be suitable for special chip respectively with descending Digital Up Convert module 213 and realize, the special chip that also can use a slice to have digital-to-analogue conversion function and Digital Up Convert function simultaneously realizes, also can be that descending Digital Up Convert module 213 is integrated in FPGA or dsp chip and D/A converter module 214 is still used special chip; Described descending digiboard monitoring slave module 215 can use special chip to realize.
In upstream digital module 24 of the present utility model, described uplink baseband processing module 243 is integrated in a FPGA or the dsp chip; Analog-to-digital conversion module 241 in the described upstream digital module can be suitable for special chip respectively with upstream digital down conversion module 242 and realize, the special chip that also can use a slice to have analog-digital conversion function and Digital Down Convert function simultaneously realizes, also can be that upstream digital down conversion module 242 is integrated in FPGA or dsp chip and analog-to-digital conversion module 241 still uses special chip; Described upstream digital board monitoring slave module 245 can use special chip to realize.
Described uplink baseband processing module 152 and downgoing baseband processing module 133 also can be integrated in same FPGA or the dsp chip;
Described uplink baseband processing module 243 and downgoing baseband processing module 212 also can be integrated in same FPGA or the dsp chip;
Described descending digiboard monitoring slave module 135 and upstream digital board monitoring slave module 155 can be integrated in the same special chip.
Described descending digiboard monitoring slave module 215 and upstream digital board monitoring slave module 245 can be integrated in the same special chip.
Described filter submodule 2171 can adopt wave digital lowpass filter, also can adopt digital band-pass filter;
Described filter submodule 1571 can adopt wave digital lowpass filter, also can adopt digital band-pass filter;
Up frequency conversion monitoring slave module 143 in descending frequency conversion monitoring slave module 123 in the described descending analog down module 12 and the up simulation up-conversion module 14 can be integrated in the same special chip;
Up frequency conversion monitoring slave module 253 in descending frequency conversion monitoring slave module 223 in the described descending simulation up-conversion module 22 and the up analog down module 25 can be integrated in the same special chip.
In sum, the utility model has been realized the moving of working passband of digital RF far-drawing system, makes the operation of operator more convenient, and needn't be the different new systems of working passband configuration, saves cost greatly.
The foregoing description is the utility model preferred implementation; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (7)
1, a kind of working passband digital RF far-drawing system that can move, comprise digital access control unit and digital radio frequency far-pulling unit, form up link and down link by digital access control unit and digital radio frequency far-pulling unit, be used to produce the local oscillator module that local frequency changes the working passband of up link and down link thereby in up link that belongs to digital access control unit and down link, all include, it is characterized in that:
Be equipped with the monitoring host computer module in described digital access control unit and the digital radio frequency far-pulling unit, be used to utilize external equipment to its default new working passband calculation of parameter to the central channel of new working passband number;
Corresponding each local oscillator module is provided with a monitoring slave module, is used to utilize central channel that the monitoring main modular calculates number further to calculate the new local frequency of corresponding local oscillator module and act on this local oscillator module.
2, the working passband according to claim 1 digital RF far-drawing system that can move, it is characterized in that: in the described up link, comprise the low noise amplification module, analog down module, the analog-to-digital conversion module that belong to the digital radio frequency far-pulling unit, Digital Down Converter Module, uplink baseband processing module, light are sent out module, with comprise the light that belongs to digital access control unit and receive module, uplink baseband processing module, Digital Up Convert module, D/A converter module, simulation up-conversion module;
In the digital radio frequency far-pulling unit, upward signal is after the low noise amplification module amplifies, be downconverted into analog intermediate frequency signal through the analog down module, convert number format to through analog-to-digital conversion module, further downconvert to baseband signal through Digital Down Converter Module, after carrying out Data Format Transform by the uplink baseband processing module, send out module converts by light again and become light signal to send through optical fiber;
In digital access control unit, after light receipts module is obtained upward signal via optical fiber, convert thereof into the signal of telecommunication to after up baseband processing module finishes Data Format Transform, by Digital Up Convert module up-conversion to digital medium-frequency signal, convert analog signal to through D/A converter module again, after simulation up-conversion module converts is that radiofrequency signal is sent to the base station;
Described analog down module, simulation up-conversion module, Digital Down Converter Module, Digital Up Convert module all electrically connect with a described local oscillator module.
3, the working passband according to claim 2 digital RF far-drawing system that can move, it is characterized in that: in the described down link, comprise the analog down module, the analog-to-digital conversion module that belong to digital access control unit, Digital Down Converter Module, downgoing baseband processing module, light are sent out module, with comprise the light that belongs to the digital radio frequency far-pulling unit and receive module, downgoing baseband processing module, Digital Up Convert module, D/A converter module, simulation up-conversion module and power amplifier module;
In digital access control unit, downstream signal is downconverted into analog intermediate frequency signal through the analog down module, convert number format to through analog-to-digital conversion module, further downconvert to baseband signal through Digital Down Converter Module, after carrying out Data Format Transform by the uplink baseband processing module, send out module converts by light again and become light signal to send through optical fiber;
In digital access control unit, after light receipts module is obtained downstream signal via optical fiber, convert thereof into after the signal of telecommunication to downgoing baseband processing module finishes Data Format Transform, by Digital Up Convert module up-conversion to digital medium-frequency signal, convert analog signal to through D/A converter module again, be radiofrequency signal through simulation up-conversion module converts again, behind the power amplifier module amplifying signal, be sent to antenna-feedback system again and finish covering;
Described analog down module, simulation up-conversion module, Digital Down Converter Module, Digital Up Convert module all electrically connect with a described local oscillator module.
4, the digital RF far-drawing system that can move according to claim 2 or 3 described working passbands is characterized in that:
Described analog down module and simulation up-conversion module include frequency mixer submodule and described local oscillator module and described monitoring slave module, the local frequency that the frequency mixer submodule utilizes the local oscillator module to provide is carried out frequency conversion, and the local oscillator module is then obtained central channel number from monitoring slave module.
5, the digital RF far-drawing system that can move according to claim 2 or 3 described working passbands, it is characterized in that: described Digital Down Converter Module and Digital Up Convert module include digital mixer and as the numerically-controlled oscillator of described local oscillator module, the local frequency that digital mixer utilizes numerically-controlled oscillator to provide is carried out frequency conversion, and numerically-controlled oscillator then obtains central channel number as the local oscillator module from a monitoring slave module.
6, the working passband according to claim 2 digital RF far-drawing system that can move, it is characterized in that: the uplink baseband processing module of described digital access control unit comprises data transaction submodule and digital filter submodule, the data transaction submodule carries out data transaction with digital baseband signal, the digital filter submodule is then accepted the control of a monitoring slave module, finishes the filtering work to baseband signal.
7, the working passband according to claim 3 digital RF far-drawing system that can move, it is characterized in that: the downgoing baseband processing module of described digital radio frequency far-pulling unit comprises data transaction submodule and digital filter submodule, the data transaction submodule carries out data transaction with digital baseband signal, the digital filter submodule is then accepted the control of a monitoring slave module, finishes the filtering work to baseband signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200480795U CN201222735Y (en) | 2008-05-21 | 2008-05-21 | Digital radio frequency zooming system with shifting working passband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200480795U CN201222735Y (en) | 2008-05-21 | 2008-05-21 | Digital radio frequency zooming system with shifting working passband |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201222735Y true CN201222735Y (en) | 2009-04-15 |
Family
ID=40576237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200480795U Expired - Lifetime CN201222735Y (en) | 2008-05-21 | 2008-05-21 | Digital radio frequency zooming system with shifting working passband |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201222735Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215045A (en) * | 2011-06-02 | 2011-10-12 | 京信通信技术(广州)有限公司 | Transceiver capable of simultaneously covering second generation (2G) and third generation (3G) signals and signal processing method of transceiver |
| CN101286783B (en) * | 2008-05-21 | 2013-01-23 | 京信通信系统（中国）有限公司 | Digital RF remote system with movable working passband and method to move the working passband |
| CN106463843A (en) * | 2014-05-23 | 2017-02-22 | 华为技术有限公司 | Multi-beam forming device and base station |
-
2008
- 2008-05-21 CN CNU2008200480795U patent/CN201222735Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286783B (en) * | 2008-05-21 | 2013-01-23 | 京信通信系统（中国）有限公司 | Digital RF remote system with movable working passband and method to move the working passband |
| CN102215045A (en) * | 2011-06-02 | 2011-10-12 | 京信通信技术(广州)有限公司 | Transceiver capable of simultaneously covering second generation (2G) and third generation (3G) signals and signal processing method of transceiver |
| CN102215045B (en) * | 2011-06-02 | 2013-11-20 | 京信通信技术(广州)有限公司 | Transceiver capable of simultaneously covering second generation (2G) and third generation (3G) signals and signal processing method of transceiver |
| CN106463843A (en) * | 2014-05-23 | 2017-02-22 | 华为技术有限公司 | Multi-beam forming device and base station |
| CN106463843B (en) * | 2014-05-23 | 2019-12-13 | 华为技术有限公司 | Multi-beam forming device and base station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100399842C (en) | Middle-frequency transmission method and middle-frequency interface for base-station to realize radio-frequency zoom-out | |
| CN101330309B (en) | Multi-frequency-band digital radio frequency far-pulling system and operating method thereof | |
| CN106712851B (en) | Distributed wireless signal coverage system | |
| CN101877917B (en) | Remote radio unit | |
| CN101453799B (en) | Multi-carrier digital frequency-selection radio frequency pulling system and signal processing method thereof | |
| CN103379674B (en) | A kind of multimode numeral DAS system supporting multiple source to access | |
| CN107888276B (en) | Multi-frequency band multi-mode modulation and demodulation device | |
| CN101286783B (en) | Digital RF remote system with movable working passband and method to move the working passband | |
| CN101286782A (en) | Digital RF remote system with changeable band-width and implementing method thereof | |
| CN201222735Y (en) | Digital radio frequency zooming system with shifting working passband | |
| CN102307064A (en) | Frequency-shift-based multi-system analogue fiber broadband access system and transmission method thereof | |
| CN203387690U (en) | Multi-mode digital DAS supporting multi-source access | |
| CN203788468U (en) | Digital optical fiber remote device with GSM, DCS, TD-SCDMA and WLAN coexistence | |
| CN101399600A (en) | Multi-carrier digital frequency selecting antenna repeater system and multi-carrier digital frequency selecting method thereof | |
| CN102215045B (en) | Transceiver capable of simultaneously covering second generation (2G) and third generation (3G) signals and signal processing method of transceiver | |
| CN201976105U (en) | Digital frequency-selecting repeater with in-band fluctuation compensation | |
| CN102333389A (en) | Three-mode digital optical fiber remote system | |
| CN209089249U (en) | Scytoblastema station and optical fiber distributed type base station system | |
| CN201114050Y (en) | Multi- carrier digital frequency-selecting wireless repeater station system | |
| CN201550113U (en) | Digital microwave frequency shift repeater station | |
| CN113037386B (en) | Central unit and remote unit | |
| CN204836168U (en) | Miniature relay system of multimode multifrequency communications network | |
| CN201528430U (en) | Indoor coverage system of digital repeater | |
| CN112311420B (en) | Single-standard dual-mode communication data frame configuration method, transceiving equipment and communication system | |
| CN201430591Y (en) | Railway wireless integrated relay device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090415 Effective date of abandoning: 20080521 |
|
| RGAV | Abandon patent right to avoid regrant |