CN103647846A - Digital multipoint distribution system and transmission processing method thereof - Google Patents
Digital multipoint distribution system and transmission processing method thereof Download PDFInfo
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- CN103647846A CN103647846A CN201310715621.3A CN201310715621A CN103647846A CN 103647846 A CN103647846 A CN 103647846A CN 201310715621 A CN201310715621 A CN 201310715621A CN 103647846 A CN103647846 A CN 103647846A
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Abstract
The invention relates to a digital multipoint distribution system and a transmission processing method thereof. According to the digital multipoint distribution system, a near-end access unit is composed of a power module, a monitor panel, a frequency conversion module, a medium frequency processing portion and a modem; a system expansion unit is composed of a power supply, a monitor panel, an interface conversion portion and a medium frequency processing portion; a system far-end unit is composed of a medium frequency portion, a frequency conversion module and a radio frequency amplifying portion. The transmission processing method of the digital multipoint distribution system is composed of the steps including system near-end unit transmission, system expansion unit transmission and system far-end transmission. The digital multipoint distribution system and the transmission processing method thereof solve the problems of incapability of achieving multiple-network common access, multiple-network coexisting interference, poor indoor telephone traffic absorption capacities and the like and has the advantages of multiple-network co-construction, resource sharing and construction investment sharing, low noise introduction, better signal coverage quality, convenient design, simple construction, energy conservation, emission reduction, operating cost reduction and the like.
Description
Technical field
The invention belongs to the communications field, be specifically related to a kind of digital multi-point distribution system and method for transmission processing thereof in mobile communication.
Background technology
From 2012, global TD-LTE development proposal tissue (GTI) was delivered joint action declaration in Barcelona, and since announcing " will dispose and surpass 500,000 base stations in 2014, and cover population and surpass 2,000,000,000 ", the commercial paces progress in the TD-LTE whole world very rapidly.TD-LTE accelerates to have built the complete industrial chain end to end of global industry wide participation, product high mature on the one hand, in terminal chip link, obtains important breakthrough; Commercial network quantity and business user's quantity start formation scale on the other hand, and LTE global roaming ability is verified.
There is grand planning in operator of China Mobile to the fast development of TD-LTE, is leader and the leading force of TD-LTE global evolution.From 2012, mobile operator built TD-LTE try net, had realized all standing in main city, urban, had received good effect.Within 2013, start TD-LTE networking plan to cover more than 100 more than national prefectural level city.
Mobile communication technology is the technology of a continuous evolution, needs constantly to drop into research and development.Follow-up evolution technology is wanted a moment and also is not stopped researching and developing the sustainable development of guarantee mobile communication.The network optimization is exactly according to requirement and the operator requirement to the network optimization of mobile communication system development, the network having moved is carried out to data acquisition, analysis, find out the reason that affects network quality, the technical scheme that planned network is optimized, by technological means or parameter adjustment, make network reach optimal operational condition, make Internet resources obtain best utilance.
Along with the fast development of global TD-LTE, the digital multi-point distribution system in mobile communication is compared with traditional coaxial cable indoor distribution covering system, has unrivaled advantage.Network optimization system upgrades constantly, and network is from traditional 1G analogue system, to 2G digital system, then to network and the LTE network of 3G, covers center of gravity and also from outdoor, proceeds to indoor covering.Numeral multi-point distribution system is the network optimization system of the third generation mobile communication system, the network optimization series of products of the third generation mobile communication system that the digital multi-point distribution system technology of take is study of platform, can realize the common access of many nets, can solve many nets mutual interference, the poor problem of indoor traffic absorbability, and the signal that is applicable to very much large scene covers, to 4G network signal, can realize comprehensive covering, to improving the communication quality of 4G network, play vital effect.
Summary of the invention
In order to overcome the shortcoming of traditional coaxial cable indoor distribution covering system technology, task of the present invention is to provide a kind of digital multi-point distribution system and method for transmission processing thereof, and it has solved traditional coaxial cable indoor distribution covering system can not realize the problems such as the common access of many nets, many nets mutual interference, indoor traffic absorbability be poor.
Technical solution of the present invention is as follows:
A digital multi-point distribution system, it comprises digital multi-point distribution system near-end access unit, digital multi-point distribution system expanding element and digital multi-point distribution system far-end;
Described digital multi-point distribution system near-end access unit is comprised of power module, monitor board, frequency-variable module, intermediate frequency process part and modulator-demodulator, comprising duplexer Dple1, duplexer Dple2, duplexer Dple3, up-conversion UpC1, up-conversion UpC2, up-conversion UpC3, down-conversion DownC1, down-conversion DownC2, down-conversion DownC3, digital-to-analogue conversion DAC, analog-to-digital conversion ADC, multimode Digital Signal Processing (Multi-Model DSP), electric light conversion EOC, optical interface OptI and protocol processes PtoPro;
Wherein: GSM meets duplexer Dple1, the duplexer Dple1 other end connects respectively frequency conversion UpC1 and down-conversion DownC1, and the up-conversion UpC1 other end connects frequency conversion UpC3, another termination duplexer of up-conversion UpC3 Dple3, another termination of duplexer Dple3 TD-LTE; Another termination analog-to-digital conversion of down-conversion DownC1 ADC, another termination multimode Digital Signal Processing of analog-to-digital conversion ADC, the multimode Digital Signal Processing other end meets respectively protocol processes PtoPro and electric light conversion EOC, another termination optical interface of electric light conversion EOC OptI, another termination of protocol processes PtoPro WLAN;
TD-SCDMA meets duplexer Dple2, the duplexer Dple2 other end connects respectively frequency conversion UpC2 and down-conversion DownC2, another termination digital-to-analogue conversion of up-conversion UpC2 DAC, another termination multimode Digital Signal Processing of digital-to-analogue conversion DAC, another termination electric light conversion of multimode Digital Signal Processing EOC, another termination optical interface of electric light conversion EOC OptI;
TD-LTE meets duplexer Dple3, and the duplexer Dple3 other end connects respectively frequency conversion UpC3 and down-conversion DownC3, and the up-conversion UpC3 other end connects frequency conversion UpC1, another termination duplexer of up-conversion UpC1 Dple1, another termination of duplexer Dple1 GSM; Another termination analog-to-digital conversion of down-conversion DownC3 ADC, another termination multimode Digital Signal Processing of analog-to-digital conversion ADC, another termination electric light conversion of multimode Digital Signal Processing EOC, another termination optical interface of electric light conversion EOC OptI;
Described digital multi-point distribution system expanding element is partly comprised of power supply, monitor board, interface conversion part and intermediate frequency process, comprising forward and backward position optical interface OptI, opto-electronic conversion OEC, electric light conversion EOC, multimode Digital Signal Processing and cascade optical interface Casde OptI;
Wherein: GSM, TD-CDMA, TD-LTE, WLAN connect optical interface OptI by digital intermediate frequency signal Optical Fiber Transmission, the optical interface OptI other end meets respectively opto-electronic conversion OEC and electric light conversion EOC, another termination multimode Digital Signal Processing of opto-electronic conversion OEC, the multimode Digital Signal Processing other end meets respectively optical interface OptI and cascade optical interface CasdeOptI; Another termination multimode Digital Signal Processing of electric light conversion EOC, the multimode Digital Signal Processing other end meets respectively optical interface OptI and cascade optical interface CasdeOptI;
Described digital multi-point distribution system far-end is by intermediate frequency process part, frequency-variable module and radio frequency amplifier section form, comprising optical interface OptI, power supply Pwr, multimode Digital Signal Processing, GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC, GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC, TD-LTE analog-to-digital conversion ADC, up-conversion UpC1, up-conversion UpC2, up-conversion UpC3, down-conversion DownC1, down-conversion DownC2, down-conversion DownC3, power amplifier PA1, power amplifier PA2, power amplifier PA3, LNA LNA1, LNA LNA2, LNA LNA3, many power amplifiers Mple and WLAN interface,
Wherein: the GSM in GTTW, TD-CDMA, TD-LTE, WLAN meet respectively optical interface OptI, the optical interface OptI other end meets respectively multimode Digital Signal Processing and power supply Pwr, and the multimode Digital Signal Processing other end connects respectively GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC and GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC, TD-LTE analog-to-digital conversion ADC and WLAN interface;
The GSM digital-to-analogue conversion DAC other end connects frequency conversion UpC1, another termination power amplifier of up-conversion UpC1 PA1, another many power amplifier of termination of power amplifier PA1 Mple;
The TD-SCDMA digital-to-analogue conversion DAC other end connects frequency conversion UpC2, another termination power amplifier of up-conversion UpC2 PA2, another many power amplifier of termination of power amplifier PA2 Mple;
The TD-LTE digital-to-analogue conversion DAC other end connects frequency conversion UpC3, another termination power amplifier of up-conversion UpC3 PA3, another many power amplifier of termination of power amplifier PA3 Mple;
Many power amplifiers Mple meets respectively LNA LNA1, LNA LNA2 and LNA LNA3 again, another termination down-conversion of LNA LNA1 DownC1, another termination of down-conversion DownC1 GSM analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of GSM analog-to-digital conversion ADC;
Another termination down-conversion of LNA LNA2 DownC2, another termination of down-conversion DownC2 TD-SCDMA analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of TD-SCDMA analog-to-digital conversion ADC;
Another termination down-conversion of LNA LNA3 DownC3, another termination of down-conversion DownC3 TD-LTE analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of TD-LTE analog-to-digital conversion ADC.
A method for transmission processing for digital multi-point distribution system, the transmitting step of digital multi-point distribution system near-end access unit is as follows:
The upper behavior digital signal of GSM is delivered to up-conversion UpC1 after multimode Digital Signal Processing (Multi-Model DSP) is processed, and delivers to after treatment duplexer Dple1 and outputs to base station baseband; GSM downstream signal is delivered to after down-conversion DownC1 processes and is delivered to analog-to-digital conversion ADC through duplexer Dple1, after analog-to-digital conversion ADC processes, delivers to multimode Digital Signal Processing, delivers to after treatment electric light conversion EOC, and the signal after conversion is exported from optical interface OptI;
TD-SCDMA downstream signal, through duplexer Dple2 input down-conversion DownC2, is delivered to analog-to-digital conversion ADC after treatment, and the signal after analog-to-digital conversion is delivered to after multimode Digital Signal Processing, through electric light conversion EOC conversion, from optical interface OptI, exports; On the signal of passing through after multimode Digital Signal Processing after digital-to-analogue conversion DAC, deliver to up-conversion UpC2 and export by duplexer Dple2;
TD-LTE downstream signal, after duplexer Dple3 delivers to down-conversion DownC3 processing, then carries out A/D and is converted to multimode digital signal, after multimode Digital Signal Processing, after electric light conversion EOC conversion, from optical interface OptI, exports; On the signal of passing through after multimode Digital Signal Processing deliver to analog-to-digital conversion DAC, then deliver to up-conversion UpC3, through duplexer Dple3, export;
WLAN signal, after protocol processes PtoPro processes, is delivered to multimode Digital Signal Processing, after electric light conversion EOC conversion, from optical interface OptI, exports; Signal after multimode Digital Signal Processing is processed and is exported by WLAN through protocol processes PtoPro.
A method for transmission processing for digital multi-point distribution system, the transmitting step of digital multi-point distribution system expanding element is as follows:
GSM, TD-CDMA, TD-LTE, WLAN signal are inputted multimode Digital Signal Processing after optical interface OptI delivers to opto-electronic conversion OEC conversion, process by optical interface OptI and cascade optical interface Casde OptI output; Signal input electric light conversion EOC conversion after multimode Digital Signal Processing is exported by optical interface OptI.
A method for transmission processing for digital multi-point distribution system, the transmitting step of digital multi-point distribution system far-end is as follows:
GSM, TD-CDMA, TD-LTE, WLAN multimode digital signal is delivered to multimode Digital Signal Processing through optical interface OptI, GSM after wherein processing, TD-CDMA, TD-LTE signal is inputted respectively GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC, signal after processing is respectively through up-conversion UpC1, up-conversion UpC2 and up-conversion UpC3 process, deliver to respectively again power amplifier PA1, power amplifier PA2 and power amplifier PA3, after amplifying, many power amplifiers Mple delivers to respectively LNA LNA1, LNA LNA2 and LNA LNA3, signal after amplification is respectively through down-conversion DownC1, after down-conversion DownC2 and down-conversion DownC3 process, deliver to respectively again GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC and TD-LTE analog-to-digital conversion ADC process, signal after processing is delivered to multimode Digital Signal Processing, through optical interface OptI, export again, WLAN signal is directly inputted to WLAN interface and amplifies processing operation.
Digital multi-point distribution system technology in the communications field of the present invention has following functions:
1, net the mutual isolation features in physical channel more.
Many cover systems transmit mutually independently, do not interfere with each other at function setting, signal, realize the physical channels of netting more and mutually isolate.
2, system stability function.
Optical fiber is as transmission medium, transmission be digital signal.System is not subject to external interference, and signal space is pure, and gain does not change with distance, without carrying out link load estimation, without carrying out attenuation compensation.Compare analog form module few, functional module is integrated, and performance safety is stable, and project installation is opened convenient and swift.
3, the parameter such as many nets link gain, power output is divided the function that is arranged.
According to the different demands of environment, the parameters such as the coverage of many nets link gain, network, power output all can be divided and be arranged.The shunt Ji He road of many nets, all by Digital Signal Processing, does not produce inter-system interference.Traditional many nets are unified for radio frequency closes road, and each inter-system interference is serious.Native system adopts optical fiber to transmit digital signal, and many network datas bag is frame format, with bit stream, does not crosstalk mutually.
4, the intermodulation anti-interference function of different systems.
Independent power amplifier amplifies radiofrequency signal, may disturb be down to minimum.And facilitate each network to carry out coverage design.Remote termination is independent power amplifier separately, does not have harmonic wave, different systems Intermodulation Interference, facilitates each network to carry out coverage design.
5, system rejection to disturbance function.
Because DAC output back noise is than more than the low 20dB of simulated light module back noise, add without carrying out optical path loss compensation.Under comparable applications condition, engineering up-downgoing back noise is exported than analog optical fiber repeater little (PL+20) dB.PL is optical path loss compensation, and up back noise is than more than the little 10dB in analog optical fiber repeater.Carry out dragging when many, little on power system capacity impact.To gsm system, can also carry out time slot noise elimination.
6, the automatic delay of delay dispersion is adjusted function.
Time delay between automatic real-time measurement near-end machine and each remote termination, regulates arbitrarily time delay by software wireless method for electrically, and automatic delay adjustment solves the delay dispersion problem existing in covering with sector.
Digital multi-point distribution system technology of the present invention can form the following advantage of product:
(1) many nets are built together, and construction investment is saved in resource-sharing.Integrated service access, native system can be realized 2G/3G/WLAN/TD-LTE multi-service signal and access simultaneously, reduces investment, economizes on resources; Meet the policy of building a conservation-minded society of country's proposition and the Joint construction and sharing policy requirements that the Ministry of Information Industry promotes energetically.Support the application of many net fusions and Internet of Things.
(2) low noise is introduced, and signal covering quality is better, improves operation income.Low noise is introduced, and effectively utilizes carrier frequency capacity.Covering field intensity is controlled, covers efficiency higher.The distribution of full optical fiber, category-5 cable, has reduced inconsistent at cable loss of radiofrequency signal, reduces the imbalance that signal covers.Capacity is shared, networking flexibility.
(3) design is convenient, and construction is simple, construction period is short, reduces construction volume.Laying with transmission route of far-end RU is irrelevant, and the design of whole scheme is exactly target coverage region to be carried out to the planning of access point (wireless, data, video etc.), finally according to the quantity of access point, determines expanding element quantity and the network architecture, completes conceptual design.Native system transmission medium adopts the mode of optical fiber and gigabit Ethernet line self adaptation compatibility, can use existing part transfer resource and realize signal arrival covering point.Upgrading is convenient, and dilatation is simple, only need operation in machine room, do not need to change transmission route and the antenna-feedback system of flat bed, and reduce the secondary construction volume bringing because of system upgrade and business development, can reduce operator in spending and the maintenance cost of follow-up operation.
(4) energy-saving and emission-reduction, cut operating costs.Whole system is not used feeder line, and all devices all can be hung wall, without taking large space.Adopt small-power to cover 17/23dBm, solve the requirement of signal depth covering and following high speed data transfer, reduce total system power consumption.
Accompanying drawing explanation
Fig. 1 is a kind of digital multi-point distribution system near-end access unit of the present invention (AU) line map.
Fig. 2 is a kind of digital multi-point distribution system expanding element of the present invention (EU) line map.
Fig. 3 is a kind of digital multi-point distribution system far-end of the present invention (RU) line map.
Reference numeral and translation:
AU(Access unit): access unit
EU(Exchange unit): crosspoint
RU(Repeater unit): TU Trunk Unit
GTTW：GSM?&?TD-SCDMA?&?TD-LTE?&?WLAN
Dple(Diplexer): duplexer
UpC(Up conversion): up-conversion
DownC(Down conversion): down-conversion
DAC(Digital to analog conversion): digital-to-analogue conversion
ADC(Analog to digital conversion): analog-to-digital conversion
Multi-Model DSP(Multi-model digital signal process): multimode Digital Signal Processing
OEC(Optical-Electro conversion): opto-electronic conversion
EOC(Electro-Optical conversion): electric light conversion
OMB(Operation and Maintenance board): monitor board
PtoPro(Protocol Process): protocol processes
Pwr-mdl(Power model): power module
IF Pro(Intermediate Frequency Process): intermediate frequency process
Conver mdl(Conversion model): modular converter
OptI(Optical Interface): optical interface
Intfce conver(Interface conversion): interface conversion
Casde OptI(Cascade Optical interface): cascade optical interface
IF DS(Intermediate Frequency digital signal): digital intermediate frequency signal
Mple(Multiplexer): many power amplifiers
POE(Power over Ethernet): Ethernet electricity
AP(Access point): access point
PA(Power Amplifier): power amplifier
LNA(Low Noise Amplifier): LNA
GTT：GSM，TD-SCDMA，TD-LTE
W intfce(WLAN interface WLAN): interface.
Embodiment
Below in conjunction with drawings and Examples, the present invention is elaborated.
Referring to Fig. 1 to Fig. 3, the invention provides a kind of digital multi-point distribution system, it is mainly comprised of digital multi-point distribution system near-end access unit, digital multi-point distribution system expanding element and digital multi-point distribution system far-end.
As shown in Figure 1, numeral multi-point distribution system near-end access unit is comprised of power module, monitor board, frequency-variable module, intermediate frequency process part and modulator-demodulator, is wherein provided with duplexer Dple1, duplexer Dple2, duplexer Dple3, up-conversion UpC1, up-conversion UpC2, up-conversion UpC3, down-conversion DownC1, down-conversion DownC2, down-conversion DownC3, digital-to-analogue conversion DAC, analog-to-digital conversion ADC, multimode Digital Signal Processing (Multi-Model DSP), electric light conversion EOC, optical interface OptI and protocol processes PtoPro.
GSM meets duplexer Dple1, and the duplexer Dple1 other end connects respectively frequency conversion UpC1 and down-conversion DownC1, and the up-conversion UpC1 other end connects frequency conversion UpC3, another termination duplexer of up-conversion UpC3 Dple3, another termination of duplexer Dple3 TD-LTE.Another termination analog-to-digital conversion of down-conversion DownC1 ADC, another termination multimode Digital Signal Processing of analog-to-digital conversion ADC, the multimode Digital Signal Processing other end meets respectively protocol processes PtoPro and electric light conversion EOC, another termination optical interface of electric light conversion EOC OptI, another termination of protocol processes PtoPro WLAN.
TD-SCDMA meets duplexer Dple2, the duplexer Dple2 other end connects respectively frequency conversion UpC2 and down-conversion DownC2, another termination digital-to-analogue conversion of up-conversion UpC2 DAC, another termination multimode Digital Signal Processing of digital-to-analogue conversion DAC, another termination electric light conversion of multimode Digital Signal Processing EOC, another termination optical interface of electric light conversion EOC OptI.
TD-LTE meets duplexer Dple3, and the duplexer Dple3 other end connects respectively frequency conversion UpC3 and down-conversion DownC3, and the up-conversion UpC3 other end connects frequency conversion UpC1, another termination duplexer of up-conversion UpC1 Dple1, another termination of duplexer Dple1 GSM.Another termination analog-to-digital conversion of down-conversion DownC3 ADC, another termination multimode Digital Signal Processing of analog-to-digital conversion ADC, another termination electric light conversion of multimode Digital Signal Processing EOC, another termination optical interface of electric light conversion EOC OptI.
WLAN meets protocol processes PtoPro, another termination multimode Digital Signal Processing of protocol processes PtoPro, another termination electric light conversion of multimode Digital Signal Processing EOC, another termination optical interface of electric light conversion EOC OptI.
As shown in Figure 2, numeral multi-point distribution system expanding element is partly comprised of power supply, monitor board, interface conversion part and intermediate frequency process, is wherein provided with forward and backward position optical interface OptI, opto-electronic conversion OEC, electric light conversion EOC, multimode Digital Signal Processing and cascade optical interface Casde OptI.
GSM, TD-CDMA, TD-LTE, WLAN connect preposition optical interface OptI by digital intermediate frequency signal Optical Fiber Transmission, the optical interface OptI other end meets respectively opto-electronic conversion OEC and electric light conversion EOC, another termination multimode Digital Signal Processing of opto-electronic conversion OEC, the multimode Digital Signal Processing other end meets respectively rearmounted optical interface OptI and cascade optical interface CasdeOptI.Another termination multimode Digital Signal Processing of electric light conversion EOC, the multimode Digital Signal Processing other end meets respectively optical interface OptI and cascade optical interface CasdeOptI.
As shown in Figure 3, numeral multi-point distribution system far-end is by intermediate frequency process part, frequency-variable module and radio frequency amplifier section form, wherein be provided with optical interface OptI, power supply Pwr, multimode Digital Signal Processing, GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC, GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC, TD-LTE analog-to-digital conversion ADC, up-conversion UpC1, up-conversion UpC2, up-conversion UpC3, down-conversion DownC1, down-conversion DownC2, down-conversion DownC3, power amplifier PA1, power amplifier PA2, power amplifier PA3, LNA LNA1, LNA LNA2, LNA LNA3, many power amplifiers Mple and WLAN interface.
GSM in GTTW, TD-CDMA, TD-LTE, WLAN meet respectively optical interface OptI, the optical interface OptI other end meets respectively multimode Digital Signal Processing and power supply Pwr, and the multimode Digital Signal Processing other end connects respectively GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC and GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC, TD-LTE analog-to-digital conversion ADC and WLAN interface.
The GSM digital-to-analogue conversion DAC other end connects frequency conversion UpC1, another termination power amplifier of up-conversion UpC1 PA1, another many power amplifier of termination of power amplifier PA1 Mple.
The TD-SCDMA digital-to-analogue conversion DAC other end connects frequency conversion UpC2, another termination power amplifier of up-conversion UpC2 PA2, another many power amplifier of termination of power amplifier PA2 Mple.
The TD-LTE digital-to-analogue conversion DAC other end connects frequency conversion UpC3, another termination power amplifier of up-conversion UpC3 PA3, another many power amplifier of termination of power amplifier PA3 Mple.
Many power amplifiers Mple meets respectively power amplifier PA1, power amplifier PA2, power amplifier PA3, LNA LNA1, LNA LNA2 and LNA LNA3.Another termination down-conversion of LNA LNA1 DownC1, another termination of down-conversion DownC1 GSM analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of GSM analog-to-digital conversion ADC, another termination optical interface of multimode Digital Signal Processing OptI, another termination of optical interface OptI GTTW.
Another termination down-conversion of LNA LNA2 DownC2, another termination of down-conversion DownC2 TD-SCDMA analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of TD-SCDMA analog-to-digital conversion ADC, another termination optical interface of multimode Digital Signal Processing OptI, another termination of optical interface OptI GTTW.
Another termination down-conversion of LNA LNA3 DownC3, another termination of down-conversion DownC3 TD-LTE analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of TD-LTE analog-to-digital conversion ADC, another termination optical interface of multimode Digital Signal Processing OptI, another termination of optical interface OptI GTTW.
WLAN interface connects multimode Digital Signal Processing, another termination optical interface of multimode Digital Signal Processing OptI, another termination of optical interface OptI GTTW.
The operation principle of a kind of digital multi-point distribution system near-end access unit of the present invention is as follows:
The upper behavior digital signal of GSM is delivered to up-conversion UpC1 after multimode Digital Signal Processing (Multi-Model DSP) is processed, and delivers to after treatment duplexer Dple1 and outputs to base station baseband.GSM downstream signal is delivered to after down-conversion DownC1 processes and is delivered to analog-to-digital conversion ADC through duplexer Dple1, after analog-to-digital conversion ADC processes, delivers to multimode Digital Signal Processing, delivers to after treatment electric light conversion EOC, and the signal after conversion is exported from optical interface OptI.
TD-SCDMA downstream signal, through duplexer Dple2 input down-conversion DownC2, is delivered to analog-to-digital conversion ADC after treatment, and the signal after analog-to-digital conversion is delivered to after multimode Digital Signal Processing, through electric light conversion EOC conversion, from optical interface OptI, exports.On the signal of passing through after multimode Digital Signal Processing after digital-to-analogue conversion DAC, deliver to up-conversion UpC2 and export by duplexer Dple2.
TD-LTE downstream signal, after duplexer Dple3 delivers to down-conversion DownC3 processing, then carries out A/D and is converted to multimode digital signal, after multimode Digital Signal Processing, after electric light conversion EOC conversion, from optical interface OptI, exports.On the signal of passing through after multimode Digital Signal Processing deliver to analog-to-digital conversion DAC, then deliver to up-conversion UpC3, through duplexer Dple3, export.
WLAN signal, after protocol processes PtoPro processes, is delivered to multimode Digital Signal Processing, after electric light conversion EOC conversion, from optical interface OptI, exports.Signal after multimode Digital Signal Processing is processed and is exported by WLAN through protocol processes PtoPro.
The operation principle of a kind of digital multi-point distribution system expanding element of the present invention is as follows:
GSM, TD-CDMA, TD-LTE, WLAN signal are inputted multimode Digital Signal Processing after optical interface OptI delivers to opto-electronic conversion OEC conversion, process by optical interface OptI and cascade optical interface Casde OptI output.Signal input electric light conversion EOC conversion after multimode Digital Signal Processing is exported by optical interface OptI.
The operation principle of a kind of digital multi-point distribution system far-end of the present invention is as follows:
GSM, TD-CDMA, TD-LTE, WLAN multimode digital signal is delivered to multimode Digital Signal Processing through optical interface OptI, GSM after wherein processing, TD-CDMA, TD-LTE signal is inputted respectively GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC, signal after processing is respectively through up-conversion UpC1, up-conversion UpC2 and up-conversion UpC3 process, deliver to respectively again power amplifier PA1, power amplifier PA2 and power amplifier PA3, after amplifying, many power amplifiers Mple delivers to respectively LNA LNA1, LNA LNA2 and LNA LNA3, signal after amplification is respectively through down-conversion DownC1, after down-conversion DownC2 and down-conversion DownC3 process, deliver to respectively again GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC and TD-LTE analog-to-digital conversion ADC process, signal after processing is delivered to multimode Digital Signal Processing, through optical interface OptI, export again.WLAN signal is directly inputted to WLAN interface and amplifies processing operation.
In sum, digital multi-point distribution system of the present invention and method for transmission processing thereof have that many nets physical channel isolates mutually, the parameter such as system stability function, many nets link gain and power output divides the intermodulation automatic delay anti-interference and system rejection to disturbance function and delay dispersion of the function that is arranged, different systems to adjust function.Digital multi-point distribution system of the present invention and method for transmission processing thereof also have plurality of advantages, as many nets are built together, resource-sharing, saving construction investment; Low noise is introduced, and signal covering quality is better, improves operation income; Design is convenient, and construction is simple, construction period is short, reduces construction volume; Energy-saving and emission-reduction, cut operating costs.
Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment is only for the present invention is described, and not as limitation of the invention, as long as within the scope of connotation of the present invention, the variation of above-described embodiment, modification etc. all will be dropped in the scope of the claims in the present invention.
Claims (4)
1. a digital multi-point distribution system, is characterized in that: it comprises digital multi-point distribution system near-end access unit, digital multi-point distribution system expanding element and digital multi-point distribution system far-end;
Described digital multi-point distribution system near-end access unit is comprised of power module, monitor board, frequency-variable module, intermediate frequency process part and modulator-demodulator, comprising duplexer Dple1, duplexer Dple2, duplexer Dple3, up-conversion UpC1, up-conversion UpC2, up-conversion UpC3, down-conversion DownC1, down-conversion DownC2, down-conversion DownC3, digital-to-analogue conversion DAC, analog-to-digital conversion ADC, multimode Digital Signal Processing (Multi-Model DSP), electric light conversion EOC, optical interface OptI and protocol processes PtoPro;
Wherein: GSM meets duplexer Dple1, the duplexer Dple1 other end connects respectively frequency conversion UpC1 and down-conversion DownC1, and the up-conversion UpC1 other end connects frequency conversion UpC3, another termination duplexer of up-conversion UpC3 Dple3, another termination of duplexer Dple3 TD-LTE; Another termination analog-to-digital conversion of down-conversion DownC1 ADC, another termination multimode Digital Signal Processing of analog-to-digital conversion ADC, the multimode Digital Signal Processing other end meets respectively protocol processes PtoPro and electric light conversion EOC, another termination optical interface of electric light conversion EOC OptI, another termination of protocol processes PtoPro WLAN;
TD-SCDMA meets duplexer Dple2, the duplexer Dple2 other end connects respectively frequency conversion UpC2 and down-conversion DownC2, another termination digital-to-analogue conversion of up-conversion UpC2 DAC, another termination multimode Digital Signal Processing of digital-to-analogue conversion DAC, another termination electric light conversion of multimode Digital Signal Processing EOC, another termination optical interface of electric light conversion EOC OptI;
TD-LTE meets duplexer Dple3, and the duplexer Dple3 other end connects respectively frequency conversion UpC3 and down-conversion DownC3, and the up-conversion UpC3 other end connects frequency conversion UpC1, another termination duplexer of up-conversion UpC1 Dple1, another termination of duplexer Dple1 GSM; Another termination analog-to-digital conversion of down-conversion DownC3 ADC, another termination multimode Digital Signal Processing of analog-to-digital conversion ADC, another termination electric light conversion of multimode Digital Signal Processing EOC, another termination optical interface of electric light conversion EOC OptI;
Described digital multi-point distribution system expanding element is partly comprised of power supply, monitor board, interface conversion part and intermediate frequency process, comprising forward and backward position optical interface OptI, opto-electronic conversion OEC, electric light conversion EOC, multimode Digital Signal Processing and cascade optical interface Casde OptI;
Wherein: GSM, TD-CDMA, TD-LTE, WLAN connect optical interface OptI by digital intermediate frequency signal Optical Fiber Transmission, the optical interface OptI other end meets respectively opto-electronic conversion OEC and electric light conversion EOC, another termination multimode Digital Signal Processing of opto-electronic conversion OEC, the multimode Digital Signal Processing other end meets respectively optical interface OptI and cascade optical interface CasdeOptI; Another termination multimode Digital Signal Processing of electric light conversion EOC, the multimode Digital Signal Processing other end meets respectively optical interface OptI and cascade optical interface CasdeOptI;
Described digital multi-point distribution system far-end is by intermediate frequency process part, frequency-variable module and radio frequency amplifier section form, comprising optical interface OptI, power supply Pwr, multimode Digital Signal Processing, GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC, GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC, TD-LTE analog-to-digital conversion ADC, up-conversion UpC1, up-conversion UpC2, up-conversion UpC3, down-conversion DownC1, down-conversion DownC2, down-conversion DownC3, power amplifier PA1, power amplifier PA2, power amplifier PA3, LNA LNA1, LNA LNA2, LNA LNA3, many power amplifiers Mple and WLAN interface,
Wherein: the GSM in GTTW, TD-CDMA, TD-LTE, WLAN meet respectively optical interface OptI, the optical interface OptI other end meets respectively multimode Digital Signal Processing and power supply Pwr, and the multimode Digital Signal Processing other end connects respectively GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC and GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC, TD-LTE analog-to-digital conversion ADC and WLAN interface;
The GSM digital-to-analogue conversion DAC other end connects frequency conversion UpC1, another termination power amplifier of up-conversion UpC1 PA1, another many power amplifier of termination of power amplifier PA1 Mple;
The TD-SCDMA digital-to-analogue conversion DAC other end connects frequency conversion UpC2, another termination power amplifier of up-conversion UpC2 PA2, another many power amplifier of termination of power amplifier PA2 Mple;
The TD-LTE digital-to-analogue conversion DAC other end connects frequency conversion UpC3, another termination power amplifier of up-conversion UpC3 PA3, another many power amplifier of termination of power amplifier PA3 Mple;
Many power amplifiers Mple meets respectively LNA LNA1, LNA LNA2 and LNA LNA3 again, another termination down-conversion of LNA LNA1 DownC1, another termination of down-conversion DownC1 GSM analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of GSM analog-to-digital conversion ADC;
Another termination down-conversion of LNA LNA2 DownC2, another termination of down-conversion DownC2 TD-SCDMA analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of TD-SCDMA analog-to-digital conversion ADC;
Another termination down-conversion of LNA LNA3 DownC3, another termination of down-conversion DownC3 TD-LTE analog-to-digital conversion ADC, another termination multimode Digital Signal Processing of TD-LTE analog-to-digital conversion ADC.
2. a method for transmission processing for digital multi-point distribution system, is characterized in that, the transmitting step of digital multi-point distribution system near-end access unit is as follows:
The upper behavior digital signal of GSM is delivered to up-conversion UpC1 after multimode Digital Signal Processing (Multi-Model DSP) is processed, and delivers to after treatment duplexer Dple1 and outputs to base station baseband; GSM downstream signal is delivered to after down-conversion DownC1 processes and is delivered to analog-to-digital conversion ADC through duplexer Dple1, after analog-to-digital conversion ADC processes, delivers to multimode Digital Signal Processing, delivers to after treatment electric light conversion EOC, and the signal after conversion is exported from optical interface OptI;
TD-SCDMA downstream signal, through duplexer Dple2 input down-conversion DownC2, is delivered to analog-to-digital conversion ADC after treatment, and the signal after analog-to-digital conversion is delivered to after multimode Digital Signal Processing, through electric light conversion EOC conversion, from optical interface OptI, exports; On the signal of passing through after multimode Digital Signal Processing after digital-to-analogue conversion DAC, deliver to up-conversion UpC2 and export by duplexer Dple2;
TD-LTE downstream signal, after duplexer Dple3 delivers to down-conversion DownC3 processing, then carries out A/D and is converted to multimode digital signal, after multimode Digital Signal Processing, after electric light conversion EOC conversion, from optical interface OptI, exports; On the signal of passing through after multimode Digital Signal Processing deliver to analog-to-digital conversion DAC, then deliver to up-conversion UpC3, through duplexer Dple3, export;
WLAN signal, after protocol processes PtoPro processes, is delivered to multimode Digital Signal Processing, after electric light conversion EOC conversion, from optical interface OptI, exports; Signal after multimode Digital Signal Processing is processed and is exported by WLAN through protocol processes PtoPro.
3. a method for transmission processing for digital multi-point distribution system, is characterized in that, the transmitting step of digital multi-point distribution system expanding element is as follows:
GSM, TD-CDMA, TD-LTE, WLAN signal are inputted multimode Digital Signal Processing after optical interface OptI delivers to opto-electronic conversion OEC conversion, process by optical interface OptI and cascade optical interface Casde OptI output; Signal input electric light conversion EOC conversion after multimode Digital Signal Processing is exported by optical interface OptI.
4. a method for transmission processing for digital multi-point distribution system, is characterized in that, the transmitting step of digital multi-point distribution system far-end is as follows:
GSM, TD-CDMA, TD-LTE, WLAN multimode digital signal is delivered to multimode Digital Signal Processing through optical interface OptI, GSM after wherein processing, TD-CDMA, TD-LTE signal is inputted respectively GSM digital-to-analogue conversion DAC, TD-SCDMA digital-to-analogue conversion DAC, TD-LTE digital-to-analogue conversion DAC, signal after processing is respectively through up-conversion UpC1, up-conversion UpC2 and up-conversion UpC3 process, deliver to respectively again power amplifier PA1, power amplifier PA2 and power amplifier PA3, after amplifying, many power amplifiers Mple delivers to respectively LNA LNA1, LNA LNA2 and LNA LNA3, signal after amplification is respectively through down-conversion DownC1, after down-conversion DownC2 and down-conversion DownC3 process, deliver to respectively again GSM analog-to-digital conversion ADC, TD-SCDMA analog-to-digital conversion ADC and TD-LTE analog-to-digital conversion ADC process, signal after processing is delivered to multimode Digital Signal Processing, through optical interface OptI, export again, WLAN signal is directly inputted to WLAN interface and amplifies processing operation.
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