CN202565279U - Remote terminal for fiber far-pulling type wireless distribution system - Google Patents
Remote terminal for fiber far-pulling type wireless distribution system Download PDFInfo
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- CN202565279U CN202565279U CN2012201849591U CN201220184959U CN202565279U CN 202565279 U CN202565279 U CN 202565279U CN 2012201849591 U CN2012201849591 U CN 2012201849591U CN 201220184959 U CN201220184959 U CN 201220184959U CN 202565279 U CN202565279 U CN 202565279U
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Abstract
Disclosed is a remote terminal for a fiber far-pulling type wireless distribution system, comprising an optical interface, a digital signal processing module, an A/D and D/A transition module, a frequency conversion module, an RF amplification module, and a path-combining module, wherein the optical interface is used for realizing the optical transmit-receive processing of the digital signals of different systems; the digital signal processing module is used for carrying out digital signal separation and path combination; the A/D and D/A transition module is used for carrying out digital-analog and analog-to-digital conversion over the uplink signals and the downlink signals respectively; the frequency conversion module is used for restoring the analog intermediate frequency signals into the downlink signals of the actual downlink working frequency and transforming the uplink signals from the RF amplification module into the analog intermediate frequency signals; the RF amplification module is used for carrying out signal amplification processing; and the path-combining module is used for carrying out signal path-combining processing. The remote terminal of the utility model can simultaneously support the wireless communication network of multiple standards and effectively solve the problems of repeated construction of covering networks of the service providers and inter-network interference.
Description
Technical field
The utility model relates to communication technical field, more particularly, relates to a kind of remote termination that is used for fiber optic stretch formula wireless distribution system.
Background technology
The mobile communications network of China is through for many years fast development; Present three big operators have dropped into and have comprised code division multiple access (Code Division Multiple Access; CDMA), global system for mobile communications (Global System for Mobile communications; GSM), dcs (Distributed Control System; DCS), CDMA (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access; WCDMA), TD SDMA (Time Division-Synchronous Code Division Multiple Access; TD-SCDMA) 2G, the 3G network of a plurality of standards such as, and comprise that the 4G network of a plurality of LTE (Long Term Evolution) standard also will put it into commercial operation future.Continuous development along with mobile communications network; The overlay device of using traditional single system will bring the problem of networking difficulty, quality and repeated construction in the networking of operator, especially more and more outstanding to problems such as interference between the repeated construction that covering system brought of building oneself in each operation of same covering scene respectively, net.
Yet; The distal power unit that is widely used in the fiber optic stretch formula wireless coverage equipment in the various forms of overlay networks at present all is the equipment of single system or dual system mostly; Can only support one to two various network standard at most; Covering when realizing a plurality of network wireless signal then can only be by multisystem mixing platform (Point of Interest; POI) equipment with a plurality of different systems closes the road at its output, but owing to the POI internal structure is complicated, reasons such as components and parts are many, volume is big, Insertion Loss height, in practical application, still can bring some problems.
The utility model content
The technical problem that the utility model will solve is, to the above-mentioned defective of prior art, a kind of remote termination that is used for fiber optic stretch formula wireless distribution system that can support a plurality of standard cordless communication networks simultaneously is provided.
The utility model solves the technical scheme that its technical problem adopted:
Construct a kind of remote termination that is used for fiber optic stretch formula wireless distribution system, comprise optical interface, digital signal processing module, A/D and D/A modular converter, frequency-variable module, the RF Amplifier Module that communication in order connects and close the road module; Wherein,
Said optical interface is used to connect optical module and said digital signal processing module, realizes that the light transmitting-receiving of different system digital signal handles;
Said digital signal processing module is sent to said optical interface after being used for the said digital signal of different system carried out being sent to said A/D and D/A modular converter and will closing the road from the digital medium-frequency signal of said A/D and D/A modular converter after the separating treatment;
Said A/D and D/A modular converter are used for the digital medium-frequency signal of separator well is converted into analog if signal and will convert digital medium-frequency signal to from the analog if signal of said frequency-variable module;
Said frequency-variable module is used for said analog if signal is reduced to the downstream signal of actual downstream operating frequency and will converts analog if signal into from the upward signal of said RF Amplifier Module;
Said RF Amplifier Module is used for carrying out two-way processing and amplifying from the downstream signal of said frequency-variable module with from the said upward signal that closes the road module;
The said road module of closing is used for downstream signal with a plurality of different frequencies and closes the road and handle the back and receive and dispatch through prevention at radio-frequency port and the different frequency upward signal that prevention at radio-frequency port receives is carried out sending to said RF Amplifier Module after the separating treatment.
The described remote termination of the utility model, wherein, the said road module of closing comprises:
The different frequency upward signal that is used for that prevention at radio-frequency port is received carries out sending to after the separating treatment the up mixer of said RF Amplifier Module;
Be used for the downstream signal of a plurality of different frequencies is closed the descending mixer that receive and dispatch through prevention at radio-frequency port processing back, road;
Close the road respectively and be assigned to the electric bridge that two said prevention at radio-frequency port are received and dispatched with the upward signal and the downstream signal that are used for from said up mixer and said descending mixer.
The described remote termination of the utility model, wherein, said RF Amplifier Module comprises down link radio-frequency module and up link radio-frequency module: wherein,
Said down link radio-frequency module comprises the descending power amplifier of multichannel and the one group of TD-SCDMA radio frequency unit that is used for the downstream signal from said frequency-variable module is carried out processing and amplifying;
Said up link radio-frequency module comprises the AP unit that is used for the up low noise amplifier of multichannel and a tunnel that carries out processing and amplifying from the said upward signal that closes the road module is used for the WLAN signal transmitting and receiving.
The described remote termination of the utility model, wherein, the descending power amplifier of said multichannel comprises GSM power amplifier, DCS power amplifier, CDMA power amplifier and WCDMA power amplifier;
The up low noise amplifier of said multichannel comprises GSM low noise amplifier, DCS low noise amplifier, CDMA low noise amplifier and WCDMA low noise amplifier.
The described remote termination of the utility model, wherein, said frequency-variable module comprises the up-conversion unit that is used for said analog if signal is reduced to the downstream signal of actual downstream operating frequency;
And the down-converter unit that will convert analog if signal into from the upward signal of said RF Amplifier Module.
The described remote termination of the utility model, wherein, said A/D and D/A modular converter comprise and are used to accomplish the D/A switch unit of digital-to-analogue conversion and are used to accomplish analog-to-digital A/D converter.
The described remote termination of the utility model; Wherein, said up mixer working frequency range comprises: the TD-SCDMA frequency range of DCS frequency range, 1880～1920MHz and the 2010～2025MHz of the CDMA frequency range of 870～880MHz, the GSM frequency range of 935～960MHz, 1805～1850MHz, the WCDMA frequency range of 2130～2145MHz.
The described remote termination of the utility model, wherein, said descending mixer working frequency range comprises: the CDMA frequency range of 825～835MHz; The GSM frequency range of 890～915MHz; The DCS frequency range of 1710～1755MHz; The WCDMA frequency range of 1940～1955MHz; The WLAN frequency range of 2400～2483.5M Hz.
The beneficial effect of the utility model is: through digital signal processing module, A/D and D/A modular converter, frequency-variable module, the RF Amplifier Module that can handle different system different frequency range digital signal simultaneously being set in remote termination and closing the road module; Make the far-end function support to comprise the cordless communication network of a plurality of standards of CDMA, GSM, DCS, WCDMA, TD-SCDMA, WLAN simultaneously; Once construction can realize that just the wireless signal of a plurality of communication networks covers, and can effectively solve the problem of disturbing between operator's overlay network repeated construction and net.Simultaneously, the remote termination of the utility model all carries out Digital Signal Processing to upward signal in each system and downstream signal, has effectively guaranteed the isolation between each system, has reduced signal interference between system.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the remote termination principle schematic one that is used for fiber optic stretch formula wireless distribution system of the utility model preferred embodiment;
Fig. 2 is the remote termination principle schematic two that is used for fiber optic stretch formula wireless distribution system of the utility model preferred embodiment.
Embodiment
The remote termination theory diagram that is used for fiber optic stretch formula wireless distribution system of the utility model preferred embodiment is as shown in Figure 1, comprises optical interface 10, digital signal processing module 20, A/D and D/A modular converter 30, frequency-variable module 40, the RF Amplifier Module 50 that communication in order connects and closes road module 60.Wherein, optical interface 10 is used to connect optical module and digital signal processing module 20, realizes that the light transmitting-receiving of different system digital signal handles; Digital signal processing module 20 is sent to optical interface 10 after being used for the digital signal of different system carried out being sent to A/D and D/A modular converter 30 and will closing the road from the digital medium-frequency signal of A/D and D/A modular converter 30 after the separating treatment; A/D and D/A modular converter 30, be used for digital medium-frequency signal with separator well convert into analog if signal and in the future the analog if signal of self frequency-changing's module 40 convert digital medium-frequency signal to; Frequency-variable module 40 is used for analog if signal is reduced to the downstream signal of actual downstream operating frequency and will converts analog if signal into from the upward signal of RF Amplifier Module 50; RF Amplifier Module 50 is used for carrying out two-way processing and amplifying from the downstream signal of frequency-variable module 40 with from the upward signal that closes road module 60; Close road module 60, be used for downstream signal with a plurality of different frequencies and close the road and handle the back and receive and dispatch through prevention at radio-frequency port and the different frequency upward signal that prevention at radio-frequency port receives is carried out sending to RF Amplifier Module 50 after the separating treatment.
Wherein, above-mentioned different system is meant the wireless communication network system of a plurality of standards that comprise CDMA, GSM, DCS, WCDMA, TD-SCDMA, WLAN, and the digital signal of different system is distinguished according to different frequency range.Above-mentioned optical interface 10, digital signal processing module 20, A/D and D/A modular converter 30, frequency-variable module 40, RF Amplifier Module 50 and close road module 60 and can handle different system different frequency range digital signal simultaneously; Make the far-end function of present embodiment support to comprise the cordless communication network of a plurality of standards of CDMA, GSM, DCS, WCDMA, TD-SCDMA, WLAN simultaneously; Once construction can realize that just the wireless signal of a plurality of communication networks covers, and can effectively solve the problem of disturbing between operator's overlay network repeated construction and net.The remote termination of present embodiment all carries out Digital Signal Processing to upward signal in each system and downstream signal simultaneously, has effectively guaranteed the isolation between each system, has reduced signal interference between system.
Further, as shown in Figure 2, the road module 60 of closing in the said distal ends machine comprises up mixer 62, descending mixer 61 and an electric bridge 63.The different frequency upward signal that wherein up mixer 62 is used for that prevention at radio-frequency port is received carries out sending to RF Amplifier Module 50 after the separating treatment, and descending mixer 61 is used for downstream signal with a plurality of different frequencies and closes the road and handle the back and receive and dispatch through prevention at radio-frequency port; Electric bridge 63 is used for receiving and dispatching closing the road respectively and be assigned to two prevention at radio-frequency port from the upward signal of up mixer 62 and descending mixer 61 and downstream signal.Because TD-SCDMA and WLAN are tdd systems; Uplink and downlink works is in same frequency range; Therefore when closing the road with other system; The uplink and downlink signals of TD-SCDMA system all closes the road through descending mixer 61, and the uplink and downlink signals of wlan system all closes the road through up mixer 62.Adopt the mixer of uplink and downlink separate type like this; And close the road through electric bridge 63 endways; The output prevention at radio-frequency port adopts the double antenna interface shape, can effectively reduce the mixer design difficulty, reduces equipment volume; Reduce the Insertion Loss of terminal passive device, improve power amplifier utilance, optimization system upstream noise coefficient.
Wherein, up mixer 62 working frequency range comprise: the TD-SCDMA frequency range of DCS frequency range, 1880～1920MHz and the 2010～2025MHz of the CDMA frequency range of 870～880MHz, the GSM frequency range of 935～960MHz, 1805～1850MHz, the WCDMA frequency range of 2130～2145MHz.Descending mixer 61 working frequency range comprise: the CDMA frequency range of 825～835MHz; The GSM frequency range of 890～915MHz; The DCS frequency range of 1710～1755MHz; The WCDMA frequency range of 1940～1955MHz; The WLAN frequency range of 2400～2483.5M Hz.So that realize to closing road and separating treatment from the signal of the cordless communication network of a plurality of standards that comprise CDMA, GSM, DCS, WCDMA, TD-SCDMA, WLAN.
Further, as shown in Figure 2, the RF Amplifier Module 50 in the said distal ends machine comprises down link radio-frequency module 51 and up link radio-frequency module 52.Wherein, Down link radio-frequency module 51 comprises the descending power amplifier of multichannel and one group of TD-SCDMA radio frequency unit 515; The descending power amplifier of multichannel is mainly used in each the system descending signal from frequency-variable module 40 is carried out power amplification, to reach the equipment down output power that covering system needs; Up link radio-frequency module 52 comprises up low noise amplifier of multichannel and one road AP unit 525; The up low noise amplifier of multichannel mainly is to amplifying from each the communication system upward signal that closes road module 60, and AP unit 525 is used to realize the transmitting-receiving of WLAN uplink and downlink of signals.Because TD-SCDMA and WLAN are tdd systems; Uplink and downlink works is in same frequency range; Therefore when closing the road with other system; The uplink and downlink signals of TD-SCDMA system all closes the road through descending mixer 61, and the uplink and downlink signals of wlan system all closes the road through up mixer 62.
Particularly, as shown in Figure 2, the descending power amplifier of the multichannel in the said distal ends machine comprises GSM power amplifier 511, DCS power amplifier 512, CDMA power amplifier 513 and WCDMA power amplifier 514; The up low noise amplifier of multichannel comprises GSM low noise amplifier 521, DCS low noise amplifier 522, CDMA low noise amplifier 523 and WCDMA low noise amplifier 524.So that realize to processing and amplifying from the signal of the cordless communication network of a plurality of standards that comprise CDMA, GSM, DCS, WCDMA, TD-SCDMA, WLAN.
Further, as shown in Figure 2, the frequency-variable module 40 in the said distal ends machine comprises the up-conversion unit 41 that is used for analog if signal is reduced to the downstream signal of actual downstream operating frequency; And the down-converter unit 42 that will convert analog if signal into from the upward signal of RF Amplifier Module 50.And up-conversion unit 41 and 42 treatable signal band limits of down-converter unit have covered CDMA, GSM, DCS, WCDMA, TD-SCDMA, the WLAN cordless communication network in interior a plurality of standards, so that realize the support to multiple-network system.
Further; As shown in Figure 2, A/D in the said distal ends machine and D/A modular converter 30 comprise that being used to accomplish digital medium-frequency signal is converted to the D/A switch unit 31 of analog if signal and is used to accomplish the A/D converter 32 that analog if signal converts digital medium-frequency signal to.Wherein, this D/A switch unit 31 can be supported the mould of 6 passages, the mutual conversion of number intermediate-freuqncy signal at most with A/D converter 32.
Preferably, the optical interface 10 in the said distal ends machine can support the optical module of several kinds of different rates of 1.5Gbps/3Gbps/5Gbps to connect, and can allocate according to the combination of various network standard, to greatest extent the Optimization Construction cost.
In a concrete embodiment, remote termination comprises up link and down link simultaneously.Wherein, As shown in Figure 2, up link comprises: electric bridge 63, up mixer 62, GSM low noise amplifier 521, DCS low noise amplifier 522, CDMA low noise amplifier 523, WCDMA low noise amplifier 524, down-converter unit 42, A/D converter 32, digital signal processing module 20 and optical interface 10.Down link comprises: electric bridge 63, descending mixer 61, GSM power amplifier 511, DCS power amplifier 512, CDMA power amplifier 513, WCDMA power amplifier 514, up-conversion unit 41, D/A switch unit 31, digital signal processing module 20 and optical interface 10.The concrete connected mode of various piece is as shown in Figure 2 in up link and the down link, wherein up link and a downlink shared electric bridge 63, a digital signal processing module 20 and an optical interface 10.
In the remote termination in the foregoing description, the down link operation principle is following:
In the remote termination in the foregoing description, the down link operation principle is following:
Two prevention at radio-frequency port receive the upward signal that comes and are input to up mixer 62 through electric bridge 63; Up mixer 62 separates the signal of different frequency; Be sent to respectively in the low noise amplifier of different system in the up link radio-frequency module 52; Convert analog if signal through after the processing and amplifying to through different down-converter unit 42; And the A/D converter 32 that passes through converts digital medium-frequency signal to; Digital signal processing module 20 will be handled from the multi-path digital signal of different mould/number conversion unit 32, the multichannel digital uplink signal of heterogeneous networks is closed the road after, will merge good Serial No. through the CPRI agreement and be put on the optical interface 10 and transmit.Wherein, After AP unit 525 receives the up radiofrequency signal from up mixer 62 in the wlan system; Become digital medium-frequency signal through a series of treatment conversion, and be transferred in the digital signal processing module 20 through category-5 cable and together handle with the upward signal of other system.
To sum up; The utility model is through being provided with digital signal processing module 20, A/D and D/A modular converter 30, frequency-variable module 40, the RF Amplifier Module 50 that can handle different system different frequency range digital signal simultaneously and closing road module 60 in remote termination; Make the far-end function support the wireless signal of 2G, 3G and the WLAN communication system of existing three big operators to cover simultaneously; The cordless communication network that comprises a plurality of standards of CDMA, GSM, DCS, WCDMA, TD-SCDMA, WLAN; Closing the road and being isolated in device interior of multisystem accomplished, and reduces the engineering design difficulty, convenient construction and engineering maintenance; Once construction can realize that just the wireless signal of a plurality of communication networks covers, and can effectively solve the problem of disturbing between operator's overlay network repeated construction and net.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection range of the utility model accompanying claims according to above-mentioned explanation.
Claims (8)
1. a remote termination that is used for fiber optic stretch formula wireless distribution system is characterized in that, comprises optical interface, digital signal processing module, A/D and D/A modular converter, frequency-variable module, the RF Amplifier Module that communication in order connects and closes the road module; Wherein,
Said optical interface is used to connect optical module and said digital signal processing module, realizes that the light transmitting-receiving of different system digital signal handles;
Said digital signal processing module is sent to said optical interface after being used for the said digital signal of different system carried out being sent to said A/D and D/A modular converter and will closing the road from the digital medium-frequency signal of said A/D and D/A modular converter after the separating treatment;
Said A/D and D/A modular converter are used for the digital medium-frequency signal of separator well is converted into analog if signal and will convert digital medium-frequency signal to from the analog if signal of said frequency-variable module;
Said frequency-variable module is used for said analog if signal is reduced to the downstream signal of actual downstream operating frequency and will converts analog if signal into from the upward signal of said RF Amplifier Module;
Said RF Amplifier Module is used for carrying out two-way processing and amplifying from the downstream signal of said frequency-variable module with from the said upward signal that closes the road module;
The said road module of closing is used for downstream signal with a plurality of different frequencies and closes the road and handle the back and receive and dispatch through prevention at radio-frequency port and the different frequency upward signal that prevention at radio-frequency port receives is carried out sending to said RF Amplifier Module after the separating treatment.
2. remote termination according to claim 1 is characterized in that, the said road module of closing comprises:
The different frequency upward signal that is used for that prevention at radio-frequency port is received carries out sending to after the separating treatment the up mixer of said RF Amplifier Module;
Be used for the downstream signal of a plurality of different frequencies is closed the descending mixer that receive and dispatch through prevention at radio-frequency port processing back, road;
Close the road respectively and be assigned to the electric bridge that two said prevention at radio-frequency port are received and dispatched with the upward signal and the downstream signal that are used for from said up mixer and said descending mixer.
3. remote termination according to claim 1 is characterized in that, said RF Amplifier Module comprises down link radio-frequency module and up link radio-frequency module: wherein,
Said down link radio-frequency module comprises the descending power amplifier of multichannel and the one group of TD-SCDMA radio frequency unit that is used for the downstream signal from said frequency-variable module is carried out processing and amplifying;
Said up link radio-frequency module comprises the AP unit that is used for the up low noise amplifier of multichannel and a tunnel that carries out processing and amplifying from the said upward signal that closes the road module is used for the WLAN signal transmitting and receiving.
4. remote termination according to claim 3 is characterized in that, the descending power amplifier of said multichannel comprises GSM power amplifier, DCS power amplifier, CDMA power amplifier and WCDMA power amplifier;
The up low noise amplifier of said multichannel comprises GSM low noise amplifier, DCS low noise amplifier, CDMA low noise amplifier and WCDMA low noise amplifier.
5. remote termination according to claim 1 is characterized in that, said frequency-variable module comprises the up-conversion unit that is used for said analog if signal is reduced to the downstream signal of actual downstream operating frequency;
And the down-converter unit that will convert analog if signal into from the upward signal of said RF Amplifier Module.
6. remote termination according to claim 1 is characterized in that, said A/D and D/A modular converter comprise and be used to accomplish the D/A switch unit of digital-to-analogue conversion and be used to accomplish analog-to-digital A/D converter.
7. remote termination according to claim 2; It is characterized in that said up mixer working frequency range comprises: the TD-SCDMA frequency range of DCS frequency range, 1880～1920MHz and the 2010～2025MHz of the CDMA frequency range of 870～880MHz, the GSM frequency range of 935～960MHz, 1805～1850MHz, the WCDMA frequency range of 2130～2145MHz.
8. remote termination according to claim 2 is characterized in that, said descending mixer working frequency range comprises: the CDMA frequency range of 825～835MHz; The GSM frequency range of 890～915MHz; The DCS frequency range of 1710～1755MHz; The WCDMA frequency range of 1940～1955MHz; The WLAN frequency range of 2400～2483.5M Hz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201849591U CN202565279U (en) | 2012-04-27 | 2012-04-27 | Remote terminal for fiber far-pulling type wireless distribution system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012201849591U CN202565279U (en) | 2012-04-27 | 2012-04-27 | Remote terminal for fiber far-pulling type wireless distribution system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107360142A (en) * | 2017-06-26 | 2017-11-17 | 京信通信系统（中国）有限公司 | Multi-standard mixed networking Transmission system and transmission method based on CPRI frameworks |
| CN113938140A (en) * | 2021-09-30 | 2022-01-14 | 京信网络系统股份有限公司 | Remote transmission covering method, system and remote unit |
| WO2022127831A1 (en) * | 2020-12-18 | 2022-06-23 | 京信网络系统股份有限公司 | Multi-channel radio frequency transceiving device and method |
-
2012
- 2012-04-27 CN CN2012201849591U patent/CN202565279U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107360142A (en) * | 2017-06-26 | 2017-11-17 | 京信通信系统（中国）有限公司 | Multi-standard mixed networking Transmission system and transmission method based on CPRI frameworks |
| CN107360142B (en) * | 2017-06-26 | 2019-10-08 | 京信通信系统（中国）有限公司 | Multi-standard mixed networking Transmission system and transmission method based on CPRI framework |
| WO2022127831A1 (en) * | 2020-12-18 | 2022-06-23 | 京信网络系统股份有限公司 | Multi-channel radio frequency transceiving device and method |
| CN113938140A (en) * | 2021-09-30 | 2022-01-14 | 京信网络系统股份有限公司 | Remote transmission covering method, system and remote unit |
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Address after: Room 9, No. 100085 East Road, Qinghe Railway Station, Beijing, Haidian District, China, 3016 Patentee after: WELLHEAD STONE TECHNOLOGY CO., LTD. Address before: 100101 Beijing city Chaoyang District Anxiang Lane No. 11 Beijing building B block 11 layer Patentee before: Beijing Hanming Communication Co., Ltd. |
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Address after: Room 9, No. 100085 East Road, Qinghe Railway Station, Beijing, Haidian District, China, 3016 Patentee after: Wellhead Stone Technology Co., Ltd. Address before: Room 9, No. 100085 East Road, Qinghe Railway Station, Beijing, Haidian District, China, 3016 Patentee before: WELLHEAD STONE TECHNOLOGY CO., LTD. |
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