CN105406924A - Multi-frequency-band digital distributed antenna system - Google Patents
Multi-frequency-band digital distributed antenna system Download PDFInfo
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- CN105406924A CN105406924A CN201510628873.1A CN201510628873A CN105406924A CN 105406924 A CN105406924 A CN 105406924A CN 201510628873 A CN201510628873 A CN 201510628873A CN 105406924 A CN105406924 A CN 105406924A
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Abstract
The invention discloses a multi-frequency-band digital distributed antenna system used for realizing communication between a mobile communication base station and a mobile client. The system comprises a near-end unit and a far-end unit connected and communicating with each other, the near-end unit is connected and communicates with the mobile communication base station, and the far-end unit is connected and communicates with the mobile client; in a downlink, downlink signals are coupled to the near-end unit from the mobile communication base station and converted to analog intermediate frequency signals in the near-end unit, the analog intermediate frequency signals are converted to digital signals, the digital signals are outputted and transmitted to the far-end unit from the near-end unit and converted to the analog intermediate signals in the far-end unit, and the analog intermediate frequency signals are converted to radiofrequency signals and transmitted to the mobile client in a coverage via an antenna of the far-end unit after power amplification; and in an uplink, the signals from the mobile client are received by the antenna of the far-end unit and transmitted to the mobile communication base station via an inverse process of the downlink.
Description
Technical field
The present invention relates to the in-door covering technology of mobile communication system, more particularly, relate to a kind of multi-frequency-band digital distributing antenna system.
Background technology
Along with the development of mobile communication technology, communications band and operation commercial city are progressively increased along with the development of business, and the situation that operator uses multiple communications band or multiple operator to use respective different communication frequency range to cover some region gets more and more.Use repeater as indoor and outdoor 1 drag N zoom out covering time, if adopt existing one-segment optical fiber direct amplification station equipment, needing to have to when covering certain region with many communications bands to adopt the equipment of multiple stage different frequency range simultaneously, cost and install all more complicated.If when adopting BBU+RRU form to cover, because RRU can only support single-frequency substantially, cause cost to increase, and the information source adopted when covering certain region can not be often same main equipment producer, cause BBU to use, affect total solution and implement.
In addition, related statistical data show, mobile communication business has more than 70% to occur in indoor, data service more than 80% in 3G network occurs in indoor, following large-scale 4G network, this lifting further than regular meeting, reaches more than 90%, obviously realizes high-quality in-door covering more and more important.But regrettably, existing indoor mobile communication environment needs perfect place too much.Covering aspect, due to shielding and the absorption of building self, causes the propagation loss that radio wave is larger, defines the even blind area, the strong district of feeble field of movable signal; Capacity aspect, building is shopping mall market, conference centre such as, and because mobile phone uses density excessive, localized network capacity can not be met consumers' demand, wireless channel generation congestion phenomenon; Quality aspect, very easily there is radio frequency interference in building upper space, serving cell signal is unstable, occurs ping-pong handover effect, and voice quality is difficult to ensure, and occurs call drop phenomenon.
Summary of the invention
The object of the invention is to: a kind of multi-frequency-band digital distributing antenna system is provided, the speech quality in building can be improved and improve call completion of mobile telephone rate, to hew out high-quality indoor mobile communication region.
To achieve these goals, the invention provides a kind of multi-frequency-band digital distributing antenna system, for realizing the communication between mobile communication base station and mobile client, it comprises the near-end machine and remote termination that are interconnected communication, described near-end machine is connected with described mobile communication base station and communicates, and described remote termination is connected with described mobile client and communicates; At down link, downstream signal is coupled to near-end machine from mobile communication base station, described downstream signal is transformed to analog if signal in near-end machine, described analog if signal is transformed to digital signal, described digital signal proximally machine output is sent to remote termination, described digital signal is transformed to analog if signal in remote termination, and described analog if signal is transformed to through power amplification after radiofrequency signal, by remote termination antenna transmission to the mobile client in overlay area; In up link, after being received by remote termination from the signal of mobile client, the inverse process through above-mentioned down link is sent to mobile communication base station.
As a modification of the present invention, described near-end machine comprises more than one radio frequency converter unit, near-end digital signal processing unit, monitoring alarm unit, power subsystem and backboard unit, backboard unit is connected with radio frequency converter unit, near-end digital signal processing unit, monitoring alarm unit respectively and communicates, and power subsystem powers to respectively radio frequency converter unit, near-end digital signal processing unit, monitoring alarm unit by backboard unit.
As a modification of the present invention, at down link, the downstream signal of described radio frequency converter unit direct-coupling mobile communication base station, becomes it into intermediate-freuqncy signal after down conversion module; Described near-end digital signal processing unit is transformed to digital signal the intermediate-freuqncy signal that radio frequency converter unit exports through A/D converter, after digital signal being packaged into applicable frame format by baseband signal processing unit, send it to remote termination by digital fiber transceiver, digital fiber.
As a modification of the present invention, one to eight group guide rails, slot is provided with in the cabinet of described near-end machine, realize blindmate for one to eight radio frequency converter units insert with the backboard unit being arranged on the cabinet back side to be connected, thus realize the independent assortment of 1 to 8 frequency ranges.
As a modification of the present invention, described remote termination comprises remote digital signal processing unit, Transmit Receive Unit, multiplex's combiner unit and power subsystem, at down link, the baseband digital signal that described near-end machine is sent by digital fiber transceiver is reverted to base band data by remote digital signal processing unit, through D/A converter, it is become analog if signal again, the analog if signal exported through remote digital signal processing unit enters Transmit Receive Unit by radio frequency cable, Transmit Receive Unit is transformed to it after radiofrequency signal through radio frequency frequency conversion and carries out power amplification output through overpower amplifier, radiofrequency signal carries out filtering by multiplex's combiner unit, gone out by antenna transmission after closing road, realize the covering of signal.
As a modification of the present invention, eight Transmit Receive Unit are at the most set in described remote termination, between 1-8 frequency range and power, carry out independent assortment.
Compared with prior art, multi-frequency-band digital distributing antenna system of the present invention is made up of near-end machine (multi-frequency-band digital access unit), remote termination (multi-frequency-band digital radio frequency far-pulling unit), the independent assortment of different frequency range, different capacity can be realized, covering and the user demand of different scene and operator can be met by the combination of different frequency range, power, high-quality in-door covering is provided.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, structure of the present invention and Advantageous Effects thereof are described in detail.
Fig. 1 is the composition schematic diagram of multi-frequency-band digital distributing antenna system of the present invention.
Fig. 2 is the near-end machine structural representation of multi-frequency-band digital distributing antenna system of the present invention.
Fig. 3 is the remote termination structural representation of multi-frequency-band digital distributing antenna system of the present invention.
Embodiment
In order to make goal of the invention of the present invention, technical scheme and Advantageous Effects thereof more clear, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.Should be understood that, the embodiment described in this specification is only used to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1, Fig. 2 and Fig. 3, multi-frequency-band digital distributing antenna system of the present invention comprises near-end machine 1 (multi-frequency-band digital access unit), remote termination 2 (multi-frequency-band digital radio frequency far-pulling unit), and near-end machine 1 is connected communication with remote termination 2 by optical fiber 3; In down link, downstream signal is directly coupled to near-end machine from mobile communication base station, analog if signal is become after radio frequency converter unit, through digital signal processing unit, intermediate-freuqncy signal is transformed to digital signal through A/D converter, be packaged into after applicable frame format through digital signal processing unit, sent it to remote termination by digital fiber transceiver, digital fiber.Baseband digital signal is sent into digital signal processing unit by digital fiber transceiver by its remote termination, reverted to base band data, analog if signal is become through D/A converter, after being transformed to radiofrequency signal by Transmit Receive Unit, through power amplification, by remote termination antenna transmission to overlay area, reach the object of covering.In up link, from the signal of mobile client, after being received by remote termination antenna, then send back mobile communication base station by the inverse process of similar said process.Multi-frequency-band digital distributing antenna system direct-coupling base station signal of the present invention, utilizes digital optical fiber transmission and high efficiency radio-frequency power amplifying technique combine and realize the covering of signal.
Refer to Fig. 2, the cabinet of the near-end machine of multi-frequency-band digital distributing antenna system of the present invention is 19Inch subrack, have 12 unit to form, right from a left side: upper left is near-end digital signal processing unit 4, lower-left is 1-8 radio frequency converter unit 5, centre is monitoring alarm unit 6, and the rightest is two power subsystems 7.Radio frequency converter unit is arranged on the lower left position of subrack, can meet 1 to 8 radio frequency converter units and be inserted by guide rail, slot, realize blindmate and be connected, thus realize the independent assortment of 1 to 8 frequency ranges with backboard unit 8 below; The downstream signal of radio frequency converter unit direct-coupling mobile communication base station, becomes it into intermediate-freuqncy signal after down conversion module.Near-end digital signal processing unit is arranged on the top-left position of subrack, is fixed on guide plate by screw, realizes being connected with backboard unit communicating by RF cable and monitoring winding displacement, light mouth and the direct subtend casing of network interface; Near-end digital signal processing unit is transformed to digital signal the intermediate-freuqncy signal that radio frequency converter unit is come through A/D converter, after being packaged into applicable frame format by baseband signal processing unit, send it to remote termination by digital fiber transceiver, digital fiber.Monitoring alarm unit is arranged on the centre position of subrack, occupy between radio frequency converter unit and power subsystem, is inserted by guide rail, slot and is realized blindmate with backboard unit and be connected; Monitoring unit realizes the integral monitoring alarm of multi-frequency-band digital distributing antenna system.Power subsystem is arranged on the right-most position of subrack, and two power subsystems are inserted by guide rail, slot and realize blindmate with backboard unit and be connected, and achieve duplicate supply current-sharing, backup functionality; The Main Function of power subsystem the 220V power supply that near-end machine is introduced is become 28V export, and realizes power supply to respectively radio frequency converter unit, near-end digital signal processing unit, monitoring alarm unit by backboard unit.
Refer to Fig. 3, the cabinet of the remote termination of multi-frequency-band digital distributing antenna system of the present invention is aluminium alloy compression casting cabinet, is provided with remote digital signal processing unit 9, Transmit Receive Unit 10, power subsystem 11 and multiplex's combiner unit 12 therein.Remote digital signal processing unit receives the baseband digital signal being transmitted through the fiber to remote termination by near-end machine, the baseband digital signal that near-end machine is sent by digital fiber transceiver is reverted to base band data, then through D/A converter, it is become analog if signal.The intermediate-freuqncy signal exported through remote digital signal processing unit enters Transmit Receive Unit by radio frequency cable, and Transmit Receive Unit is transformed to it after radiofrequency signal through radio frequency frequency conversion and carries out power amplification output through overpower amplifier; According to different requirement forms, remote termination can fill at most 8 Transmit Receive Unit, realizes the independent assortment of 1-8 frequency range and power.Radiofrequency signal after Transmit Receive Unit amplifies, carries out filtering by multiplex's combiner unit, conjunction is gone out by remote termination antenna transmission behind road, realize the covering of signal.Power subsystem realizes power supply to the digital signal processing unit in remote termination, Transmit Receive Unit.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and amendment to above-mentioned execution mode.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (6)
1. a multi-frequency-band digital distributing antenna system, for realizing the communication between mobile communication base station and mobile client, it is characterized in that, it comprises the near-end machine and remote termination that are interconnected communication, described near-end machine is connected with described mobile communication base station and communicates, and described remote termination is connected with described mobile client and communicates; At down link, downstream signal is coupled to near-end machine from mobile communication base station, described downstream signal is transformed to analog if signal in near-end machine, described analog if signal is transformed to digital signal, described digital signal proximally machine output is sent to remote termination, described digital signal is transformed to analog if signal in remote termination, and described analog if signal is transformed to through power amplification after radiofrequency signal, by remote termination antenna transmission to the mobile client in overlay area; In up link, after being received by remote termination from the signal of mobile client, the inverse process through above-mentioned down link is sent to mobile communication base station.
2. multi-frequency-band digital distributing antenna system according to claim 1, it is characterized in that, described near-end machine comprises more than one radio frequency converter unit, near-end digital signal processing unit, monitoring alarm unit, power subsystem and backboard unit, backboard unit is connected with radio frequency converter unit, near-end digital signal processing unit, monitoring alarm unit respectively and communicates, and power subsystem powers to respectively radio frequency converter unit, near-end digital signal processing unit, monitoring alarm unit by backboard unit.
3. multi-frequency-band digital distributing antenna system according to claim 2, is characterized in that, at down link, the downstream signal of described radio frequency converter unit direct-coupling mobile communication base station, becomes it into intermediate-freuqncy signal after down conversion module; Described near-end digital signal processing unit is transformed to digital signal the intermediate-freuqncy signal that radio frequency converter unit exports through A/D converter, after digital signal being packaged into applicable frame format by baseband signal processing unit, send it to remote termination by digital fiber transceiver, digital fiber.
4. multi-frequency-band digital distributing antenna system according to claim 2, it is characterized in that, one to eight group guide rails, slot is provided with in the cabinet of described near-end machine, realize blindmate for one to eight radio frequency converter units insert with the backboard unit being arranged on the cabinet back side to be connected, thus realize the independent assortment of 1 to 8 frequency ranges.
5. multi-frequency-band digital distributing antenna system according to claim 1, it is characterized in that, described remote termination comprises remote digital signal processing unit, Transmit Receive Unit, multiplex's combiner unit and power subsystem, at down link, the baseband digital signal that described near-end machine is sent by digital fiber transceiver is reverted to base band data by remote digital signal processing unit, through D/A converter, it is become analog if signal again, the analog if signal exported through remote digital signal processing unit enters Transmit Receive Unit by radio frequency cable, Transmit Receive Unit is transformed to it after radiofrequency signal through radio frequency frequency conversion and carries out power amplification output through overpower amplifier, radiofrequency signal carries out filtering by multiplex's combiner unit, gone out by antenna transmission after closing road, realize the covering of signal.
6. multi-frequency-band digital distributing antenna system according to claim 5, is characterized in that, arranges eight Transmit Receive Unit at the most, between 1-8 frequency range and power, carry out independent assortment in described remote termination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510628873.1A CN105406924A (en) | 2015-09-25 | 2015-09-25 | Multi-frequency-band digital distributed antenna system |
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| CN201510628873.1A CN105406924A (en) | 2015-09-25 | 2015-09-25 | Multi-frequency-band digital distributed antenna system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939176A (en) * | 2016-06-17 | 2016-09-14 | 中国电子科技集团公司第十研究所 | Separated measurement and control calibration device |
| CN107484264A (en) * | 2017-09-18 | 2017-12-15 | 武汉虹信通信技术有限责任公司 | A kind of portable multi-frequency radio communication base station |
| CN109639846A (en) * | 2018-12-05 | 2019-04-16 | 国网辽宁省电力有限公司大连供电公司 | A kind of network server implementation method based on frequency multiplexing technique |
| CN111181595A (en) * | 2019-12-31 | 2020-05-19 | 京信通信系统（中国）有限公司 | Second harmonic cancellation method and device and DAS remote machine |
| CN113541742A (en) * | 2021-07-07 | 2021-10-22 | 贵州振华天通设备有限公司 | Frequency division multi-stream radio frequency distribution system and signal transmission method |
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| CN101035323A (en) * | 2006-12-29 | 2007-09-12 | 芯通科技（成都）有限公司 | Micro-wave extension method and device of the time division duplex mobile communication system |
| CN203788468U (en) * | 2014-04-11 | 2014-08-20 | 上海欣民通信技术有限公司 | Digital optical fiber remote device with GSM, DCS, TD-SCDMA and WLAN coexistence |
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2015
- 2015-09-25 CN CN201510628873.1A patent/CN105406924A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101035323A (en) * | 2006-12-29 | 2007-09-12 | 芯通科技（成都）有限公司 | Micro-wave extension method and device of the time division duplex mobile communication system |
| CN203788468U (en) * | 2014-04-11 | 2014-08-20 | 上海欣民通信技术有限公司 | Digital optical fiber remote device with GSM, DCS, TD-SCDMA and WLAN coexistence |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939176A (en) * | 2016-06-17 | 2016-09-14 | 中国电子科技集团公司第十研究所 | Separated measurement and control calibration device |
| CN107484264A (en) * | 2017-09-18 | 2017-12-15 | 武汉虹信通信技术有限责任公司 | A kind of portable multi-frequency radio communication base station |
| CN107484264B (en) * | 2017-09-18 | 2021-09-24 | 武汉虹信科技发展有限责任公司 | Portable multifrequency radio communication basic station |
| CN109639846A (en) * | 2018-12-05 | 2019-04-16 | 国网辽宁省电力有限公司大连供电公司 | A kind of network server implementation method based on frequency multiplexing technique |
| CN111181595A (en) * | 2019-12-31 | 2020-05-19 | 京信通信系统（中国）有限公司 | Second harmonic cancellation method and device and DAS remote machine |
| CN111181595B (en) * | 2019-12-31 | 2021-08-24 | 京信网络系统股份有限公司 | Second harmonic cancellation method and device and DAS remote machine |
| CN113541742A (en) * | 2021-07-07 | 2021-10-22 | 贵州振华天通设备有限公司 | Frequency division multi-stream radio frequency distribution system and signal transmission method |
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