CN200941617Y - Mobile communicating directly releasing station system adopting digital IF way - Google Patents
Mobile communicating directly releasing station system adopting digital IF way Download PDFInfo
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- CN200941617Y CN200941617Y CNU2005201451298U CN200520145129U CN200941617Y CN 200941617 Y CN200941617 Y CN 200941617Y CN U2005201451298 U CNU2005201451298 U CN U2005201451298U CN 200520145129 U CN200520145129 U CN 200520145129U CN 200941617 Y CN200941617 Y CN 200941617Y
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Abstract
The utility model discloses a mobile communication repeater adopts digital intermediate frequency method; the downlink signal of the base station of the utility model is converted into analog intermediate signal by a RF module and is sent to ADC/ DAC group, then converted into digital intermediate signal through A/D and is extracted and filtered by down-converter converted into base band signal again; the base band signal is sent to base band processing unit and packed into serial data according to certain frame format, and then the serial data is transmitted to the capped end high-speed digital optical fiber transceiver by long distance optical fiber through a high-speed digital optical fiber transceiver; the frame is decoded by the base band processing unit then the data is sent into ADC/DAC group; after being filtered and interpolated by digital up-converter, the data is concerted into analog intermediate signal through D/A converter; finally the signal is converted into radiofrequency signal through RF module and emitted to the corresponding covering area. The distal machine will send the received mobile terminal uplink signal up to receiving end of the base station through the inverse process of the above. The utility model avoids technical disturbances of the conventional method such as the local oscillation leakage and DC bias etc, is particularly suitable for long distance transmission of multi-carrier repeater base band signal.
Description
Affiliated technical field
The utility model relates to a kind of Mobile communication direct base station series that adopts new signal processing mode, is specifically related to a kind of mobile communication digital optical fibre repeater system that adopts digital intermediate frequency mode.
Background technology
Mobile communication direct base station has important status in the network optimization of mobile communication system and signal cover, the digital high-frequency amplification station technology also causes increasing attention, if but still carry out frequency translation in the simulation part, system uses analogue device then to be difficult to reach fully the balance of I/Q amplitude and phase place in a large number, thereby influences the performance of system.In addition, the present Communications Market one side multiple standard of second generation mobile communication system is also deposited, and still playing a significant role; New standard constantly is formulated on the other hand, but can not replace existing standard fully.Its existing system, standard is numerous, the coexistence of the new and old structures, and development communication technologies is maked rapid progress, new standard and standard continue to bring out again, and the new business that new standard provides had both had huge attraction, had caused very big pressure also for user and operator.The direct discharging station of traditional approach is difficult to adapt to present mobile communication system covers the field at the network optimization and signal many demands owing to be subjected to the restriction of technical system.
Summary of the invention
In order to solve the existing above-mentioned technical problem of traditional approach direct discharging station, and the Communications Market present situation that adapts to present multiple system and deposit, the utility model discloses a kind of mobile communication digital optical fibre repeater system that adopts digital intermediate frequency mode.The software that this system's utilization operates on the general hardware platform is realized radio communication function, give full play to the flexibility of software, realize different communication standards by reconfiguring of software, make wireless system finally break away from the constraint of hardware, have very high technological value.Be two thoughts more than the specific implementation, the utility model is realized digitlization at intermediate-frequency section, promotes the performance index of whole direct discharging station, and makes the function of radio system define and realize with software as much as possible.
Native system adopts the CPRI interface system, can handle signals such as GSM/CDMA/WCDMA/cdma2000, is common to the 2G/3G system.CPRI (The Common Public Radio Interface) has defined the interface relationship between base station data processing and control element (PCE) REC (Radio Equipment Control) and the base station transceiver unit R E (Radio Equipment).Its data structure can directly apply in the repeater, realizes the long-distance transmissions to data-signal.
The utility model is made up of relay 101 and capped end 102, finishes the signal transmission by optical fiber 103 between its relay 101 and the capped end 102.Its down link is by relay RF module 204, relay A/D converter spare 205, relay programmable digital down converter DDC206, relay baseband processing module 207, relay 8B/10B conversion module 208, relay optical transceiver 209, relay optical fiber 210, capped end optical fiber 215, capped end optical transceiver 216, capped end 8B/10B conversion module 218, capped end baseband processing module 219, capped end programmable digital upconverter DUC222, capped end D/A transformation device 220, capped end RF module 224, capped end antenna 225 constitutes, wherein, relay RF module 204 is with between the relay A/D converter spare 205, relay optical fiber 210 is with between the capped end optical fiber 215, and capped end optical fiber 215 is with between the capped end optical transceiver 216, capped end D/A transformation device 220 is with between the capped end RF module 224, capped end RF module 224 is with adopting the serial connection mode between the capped end antenna 225, relay A/D converter spare 205 is with between the programmable digital down converter DDC206 of relay, relay programmable digital down converter DDC206 is with between the relay baseband processing module 207, relay baseband processing module 207 is with between the relay 8B/10B conversion module 208, relay 8B/10B conversion module 208 is with between the relay optical transceiver 209, and capped end optical transceiver 216 is with between the capped end 8B/10B conversion module 218, capped end 8B/10B conversion module 218 is with between the capped end baseband processing module 219, capped end baseband processing module 219 is with between the capped end programmable digital upconverter DUC222, and capped end programmable digital upconverter DUC222 is with adopting the data/address bus mode between the capped end D/A transformation device 220; The up link of this system is by relay RF module 204, relay D/A converter spare 213, relay programmable digital upconverter DUC212, relay baseband processing module 207, relay 8B/10B conversion module 208, relay optical transceiver 209, relay optical fiber 210, capped end optical fiber 215, capped end optical transceiver 216, capped end 8B/10B conversion module 218, capped end baseband processing module 219, capped end programmable digital down converter DDC223, capped end A/D transformation device 227, capped end RF module 224, capped end antenna 225 constitutes, wherein, relay RF module 204 is with between the relay D/A converter spare 213, relay optical fiber 210 is with between the capped end optical fiber 215, and capped end optical fiber 215 is with between the capped end optical transceiver 216, capped end A/D transformation device 227 is with between the capped end RF module 224, capped end RF module 224 is with adopting the serial connection mode between the capped end antenna 225, relay D/A converter spare 213 is with between the programmable digital upconverter DUC212 of relay, relay programmable digital upconverter DUC212 is with between the relay baseband processing module 207, relay baseband processing module 207 is with between the relay 8B/10B conversion module 208, relay 8B/10B conversion module 208 is with between the relay optical transceiver 209, and capped end optical transceiver 216 is with between the capped end 8B/10B conversion module 218, capped end 8B/10B conversion module 218 is with between the capped end baseband processing module 219, capped end baseband processing module 219 is with between the capped end programmable digital down converter DDC223, capped end programmable digital down converter DDC223) with adopting the data/address bus mode between the capped end A/D transformation device 227.
Mobile communication downlink radiofrequency signal from the base station is admitted to RF module 204, through after the analog down it is transformed to analog if signal, this analog if signal is admitted to A/D converter spare 205, after analog if signal is transformed to digital medium-frequency signal, sending into programmable digital down converter DDC206 again extracts, processing such as filtering, finish frequency translation for the second time, make the carrier frequency of digital medium-frequency signal further reduce also and then become baseband signal, this baseband signal is admitted to baseband processing module 207, by baseband processing module 207 and then by 8B/10B conversion module 208 it is packaged into the data that are fit to the CPRI frame format, these data by optical transceiver 209 and by optical fiber 210 by away from being transferred to capped end; At capped end, at first signal is sent into the 8B/10B conversion module 218 of capped end then by baseband processing module 219 by optical transceiver 216, send into programmable digital upconverter DUC222 after signal separated frame, baseband signal is converted to digital intermediate frequency signal by frequency up-conversion operation such as filtering, interpolation, carry out conversion and digital intermediate frequency signal be converted to analog intermediate frequency signal by D/A transformation device 220 again through The disposal of gentle filter, after RF module 224 deliver to antenna 225 and be transmitted into corresponding overlay area after analog intermediate frequency signal is transformed to radiofrequency signal; The course of work of its upward signal is the inverse process of the above-mentioned downstream signal course of work.
Wherein, described RF module 204 and 224 is carried out the single-conversion processing, finishes radiofrequency signal arrives radiofrequency signal to analog if signal and analog if signal conversion; Frequency converter module DDC223 among the inverse process of described frequency converter module DDC206 and DUC222 and the above-mentioned downstream signal course of work and DUC212 carry out double conversion to be handled, and finishes digital medium-frequency signal arrives digital medium-frequency signal to baseband signal and baseband signal conversion; Its mode can be selected as required flexibly, comprising: can all comprise DDC module and DUC module in relay and capped end; Also can only comprise DDC module and DUC module at capped end in the relay or only; Perhaps only comprise DDC module and DUC module at down direction or up direction; A/D transformation device 227 among the inverse process of the described A/D transformation device 205 and the above-mentioned downstream signal course of work carries out the processing procedure of analog to digital, finishes the conversion of analog if signal to digital medium-frequency signal; D/A transformation device 213 among the inverse process of the described D/A transformation device 220 and the above-mentioned downstream signal course of work carries out the processing procedure of digital to analogy, finishes the conversion of digital medium-frequency signal to analog if signal.In described digital intermediate frequency mode, by adopting software and radio technique, intermediate-frequency section is being realized the digitized while, by carrying out corresponding software arrangements, thereby signal processing and distant signal transmission under various modes and the multiple standards are provided simultaneously, and all various wireless services existing and tomorrow requirement are provided.
The frequency range of the downstream signal that launch described base station can be: 869～894MHz of CDMA IS-95 system, 920～960MHz of gsm system, 1805～1880MHz of GSM1800 system, 1920～1990MHz of cdma2000,2110～2170MHz of WCDMA system; The frequency range of the upward signal that described remote termination received can be: 824～849MHz of CDMAIS-95 system, 885～915MHz of gsm system, 1710～1785MHz of GSM1800 system, 1850～1910MHz of cdma2000,1920～1970MHz of WCDMA system.The digital fiber transceiver of described near-end repeater and remote termination and the serial data rate on the up-downgoing optical fiber link can be: 614.4Mbps, and 1228.8Mbps, 2457.6Mbps can select according to different practical applications.
According to the description of this paper, can make many further modifications to the utility model, also can do many variations according to actual needs.Therefore, in additional claim scope, the utility model can adopt various implementation to specifically described embodiment.
The utility model has been avoided the local-oscillator leakage of the Mobile communication direct base station under the traditional approach, the puzzlement of technology such as direct current biasing, be specially adapted to the long-distance transmissions of multicarrier repeater baseband signal, for mobile communication system has increased a kind of brand-new distant signal transmission and signal covering system.
Brief Description Of Drawings
Figure 1 shows that the system block diagram of the Mobile communication direct base station of employing digital intermediate frequency mode provided by the utility model;
Fig. 2 a is depicted as system's composition diagram of near-end repeater subsystem provided by the utility model;
Fig. 2 b is depicted as far-end mulch-laying machine subsystem composition diagram provided by the utility model;
Figure 3 shows that the overall formation block diagram of the Mobile communication direct base station of employing digital intermediate frequency mode provided by the utility model.
Its description of reference numerals is as follows:
101: the relaying terminal; 102: far-end covers terminal; 103,210,215: optical fiber; 202: coupler; 203: duplexer; 204,224:RF module; 201: the base station main antenna; 214: antenna is assisted in the base station; 205,227:A/D converter; 207,219: baseband processing unit; 212,222:DUC; 206,223:DDC; 209,216: optical transceiver; 208,218:8B/10B conversion; 213,220:D/A converter; 211,221: synchronous circuit; 225,226: the capped end antenna.
Embodiment
Specifically describe corresponding to preferred embodiment of the present utility model below in conjunction with accompanying drawing:
1, Fig. 1 is the system block diagram of the Mobile communication direct base station of employing digital intermediate frequency mode provided by the utility model.
As shown in the figure, the communication repeater system of employing digital intermediate frequency mode provided by the utility model comprises relay (101) and capped end (102), finishes transmission to digital signal by optical fiber (103) between its two.
2, referring to system's composition diagram of the near-end repeater subsystem shown in Fig. 2 a.
The down link course of work of this subsystem is: as shown in the figure, near-end repeater subsystem, mobile communication downlink radiofrequency signal from the base station is admitted to RF module 204, through after the analog down it is transformed to analog if signal, this analog if signal is admitted to A/D converter spare 205, after analog if signal is transformed to digital medium-frequency signal, sending into programmable digital down converter DDC206 again extracts, processing such as filtering, finish frequency translation for the second time, make the carrier frequency of digital medium-frequency signal further reduce also and then become baseband signal, this baseband signal is admitted to baseband processing module 207, by baseband processing module 207 and then by 8B/10B conversion module 208 it is packaged into the data that are fit to the CPRI frame format, these data arrive capped end by optical transceiver 209 and by optical fiber 210 long-distance transmissions; The course of work of its upward signal is the inverse process of the above-mentioned downstream signal course of work.
3, cover system's composition diagram of terminal subsystem referring to the far-end shown in Fig. 2 b.
The down link course of work of this subsystem is: as shown in the figure, covering the terminal subsystem, at first receive the digital signal that the relay is sent here by optical transceiver 216, after separating frame by 219 pairs of signals of baseband processing module then, the 8B/10B conversion module 218 of then it being sent into capped end sends into programmable digital upconverter DUC222, with baseband signal by filtering, frequency up-conversion operation such as interpolation are converted to digital intermediate frequency signal, carry out conversion and digital intermediate frequency signal be converted to analog intermediate frequency signal by D/A transformation device 220 again through The disposal of gentle filter, after RF module 224 deliver to antenna 225 and be transmitted into corresponding overlay area after analog intermediate frequency signal is transformed to radiofrequency signal; The course of work of its upward signal is the inverse process of the above-mentioned downstream signal course of work.
4, referring to the overall formation block diagram of the Mobile communication direct base station that Figure 3 shows that employing digital intermediate frequency mode provided by the utility model.
The downstream signal of its base station (comprises the GSM signal, the CDMA signal, the WCDMA signal, all kinds of mobile communication signals such as cdma2000 signal) after being transformed to analog if signal, the RF module sends into the ADC/DAC group, be transformed to digital medium-frequency signal and extract through A/D by digital down converter, quadratic transformation is a baseband signal after the filtering, be sent to baseband processing unit then and be packaged into serial data by certain frame format, again through the high-speed figure fiber optical transceiver by the optical fiber long-distance transmissions to capped end high-speed figure fiber optical transceiver, separate by baseband processing unit and to send into the ADC/DAC group behind the frame, carry out filtering by digital up converter, interpolation is after the D/A converter becomes analog if signal, after the frequency conversion of RF module be radiofrequency signal and be transmitted into the respective coverage areas territory.Its remote termination with the portable terminal upward signal that receives by above-mentioned inverse process, on deliver to the base station receiving terminal.
In sum, although represented and described the enforcement the technical solution of the utility model with reference to specific preferred embodiment, but it can not be interpreted as the restriction to the utility model self, those skilled in the art can understand, in not breaking away from described claim, under the prerequisite of defined spirit and scope of the present utility model, can make various variations in the form and details to it.Appending claims has covered all such changes and modifications in the spirit and scope of the present utility model.
Claims (3)
1, a kind of communication repeater system that adopts digital intermediate frequency mode comprises relay (101) and capped end (102), finishes digital data transmission by optical fiber (103) between the two; It is characterized in that: the down link of this system is by relay RF module (204), relay A/D converter spare (205), relay programmable digital down converter DDC (206), relay baseband processing module (207), relay 8B/10B conversion module (208), relay optical transceiver (209), relay optical fiber (210), capped end optical fiber (215), capped end optical transceiver (216), capped end 8B/10B conversion module (218), capped end baseband processing module (219), capped end programmable digital upconverter DUC (222), capped end D/A transformation device (220), capped end RF module (224), capped end antenna (225) constitutes, wherein, relay RF module (204) is with between the relay A/D converter spare (205), relay optical fiber (210) is with between the capped end optical fiber (215), and capped end optical fiber (215) is with between the capped end optical transceiver (216), capped end D/A transformation device (220) is with between the capped end RF module (224), capped end RF module (224) is with adopting the serial connection mode between the capped end antenna (225), relay A/D converter spare (205) is with between the relay programmable digital down converter DDC (206), relay programmable digital down converter DDC (206) is with between the relay baseband processing module (207), relay baseband processing module (207) is with between the relay 8B/10B conversion module (208), relay 8B/10B conversion module (208) is with between the relay optical transceiver (209), and capped end optical transceiver (216) is with between the capped end 8B/10B conversion module (218), capped end 8B/10B conversion module (218) is with between the capped end baseband processing module (219), capped end baseband processing module (219) is with between the capped end programmable digital upconverter DUC (222), and capped end programmable digital upconverter DUC (222) is with adopting the data/address bus mode between the capped end D/A transformation device (220); The up link of this system is by relay RF module (204), relay D/A converter spare (213), relay programmable digital upconverter DUC (212), relay baseband processing module (207), relay 8B/10B conversion module (208), relay optical transceiver (209), relay optical fiber (210), capped end optical fiber (215), capped end optical transceiver (216), capped end 8B/10B conversion module (218), capped end baseband processing module (219), capped end programmable digital down converter DDC (223), capped end A/D transformation device (227), capped end RF module (224), capped end antenna (225) constitutes, wherein, relay RF module (204) is with between the relay D/A converter spare (213), relay optical fiber (210) is with between the capped end optical fiber (215), and capped end optical fiber (215) is with between the capped end optical transceiver (216), capped end A/D transformation device (227) is with between the capped end RF module (224), capped end RF module (224) is with adopting the serial connection mode between the capped end antenna (225), relay D/A converter spare (213) is with between the relay programmable digital upconverter DUC (212), relay programmable digital upconverter DUC (212) is with between the relay baseband processing module (207), relay baseband processing module (207) is with between the relay 8B/10B conversion module (208), relay 8B/10B conversion module (208) is with between the relay optical transceiver (209), and capped end optical transceiver (216) is with between the capped end 8B/10B conversion module (218), capped end 8B/10B conversion module (218) is with between the capped end baseband processing module (219), capped end baseband processing module (219) is with between the capped end programmable digital down converter DDC (223), and capped end programmable digital down converter DDC (223) is with adopting the data/address bus mode between the capped end A/D transformation device (227).
2, the communication repeater system of employing digital intermediate frequency mode according to claim 1, it is characterized in that, the workflow of its down link is: the mobile communication downlink radiofrequency signal from the base station is admitted to RF module (204), through after the module down-conversion it being transformed to analog if signal, this analog if signal is admitted to A/D converter spare (205), analog if signal is transformed to digital medium-frequency signal, sending into programmable digital down converter DDC (206) then extracts, Filtering Processing, finish frequency translation for the second time, make the carrier frequency of digital medium-frequency signal further reduce also and then become baseband signal, this baseband signal is admitted to baseband processing module (207), by baseband processing module (207) and then by 8B/10B conversion module (208) it is packaged into the data that are fit to the CPRI frame format, these data arrive capped end by optical transceiver (209) and by optical fiber (210) long-distance transmissions; At capped end, send into programmable digital upconverter DUC (222) after at first the 8B/10B conversion module (218) of signal being sent into capped end by optical transceiver (216) is separated frame by baseband processing module (219) to signal then, with baseband signal by filtering, frequency up-conversion operation such as interpolation are converted to digital intermediate frequency signal, carry out conversion and after The disposal of gentle filter, digital intermediate frequency signal be converted to analog intermediate frequency signal by D/A transformation device (220) again, after RF module (224) deliver to antenna (225) and be transmitted into corresponding overlay area after analog intermediate frequency signal is transformed to radiofrequency signal; The workflow of its up link is the adverse current journey of above-mentioned down link workflow.
3, the communication repeater system of employing digital intermediate frequency mode according to claim 1, it is characterized in that, described frequency converter module DDC (206), DDC (223), DUC (212), DUC (222) carry out double conversion to be handled, and relay and capped end all comprise DDC module and DUC module; Perhaps, only comprise DDC module and DUC module at capped end in the relay or only; Perhaps only comprise DDC module and DUC module at down direction or up direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201451298U CN200941617Y (en) | 2005-12-19 | 2005-12-19 | Mobile communicating directly releasing station system adopting digital IF way |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201451298U CN200941617Y (en) | 2005-12-19 | 2005-12-19 | Mobile communicating directly releasing station system adopting digital IF way |
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| CNU2005201451298U Expired - Fee Related CN200941617Y (en) | 2005-12-19 | 2005-12-19 | Mobile communicating directly releasing station system adopting digital IF way |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651498B (en) * | 2009-08-28 | 2012-05-23 | 深圳市云海通讯股份有限公司 | Repeater and method for removing pilot frequency pollution by same |
| CN101521518B (en) * | 2008-02-25 | 2012-08-08 | 京信通信系统（中国）有限公司 | Broadband signal digital frequency-selective system based on software radio technology |
| CN107437950A (en) * | 2017-08-04 | 2017-12-05 | 杭州长泽科技有限公司 | A kind of tunnel fm broadcast signal numeral covering scheme and implementation method |
-
2005
- 2005-12-19 CN CNU2005201451298U patent/CN200941617Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521518B (en) * | 2008-02-25 | 2012-08-08 | 京信通信系统（中国）有限公司 | Broadband signal digital frequency-selective system based on software radio technology |
| CN101651498B (en) * | 2009-08-28 | 2012-05-23 | 深圳市云海通讯股份有限公司 | Repeater and method for removing pilot frequency pollution by same |
| CN107437950A (en) * | 2017-08-04 | 2017-12-05 | 杭州长泽科技有限公司 | A kind of tunnel fm broadcast signal numeral covering scheme and implementation method |
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Granted publication date: 20070829 Termination date: 20121219 |