CN201328119Y - TD-SCDMA fiber-optical repeater - Google Patents
TD-SCDMA fiber-optical repeater Download PDFInfo
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- CN201328119Y CN201328119Y CNU2008201561183U CN200820156118U CN201328119Y CN 201328119 Y CN201328119 Y CN 201328119Y CN U2008201561183 U CNU2008201561183 U CN U2008201561183U CN 200820156118 U CN200820156118 U CN 200820156118U CN 201328119 Y CN201328119 Y CN 201328119Y
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Abstract
The utility model relates to a TD-SCDMA (time division-synchronous code division multiple access) fiber-optical repeater which includes a local machine system and a remote machine system which are connected through optical fibers. The two systems are provided with two power supply units for supplying power to the composition modules in the systems respectively. The fiber-optical repeater is characterized in that the local machine system comprises an optical transceiver, a power supply unit, a monitoring unit, a filter, a circulator and a modem; and the remote machine system comprises an optical transceiver, a radio-frequency module, a filter, a power supply unit, a monitoring unit and a modem. The fiber-optical repeater comprises an up-link and a down-link signals which work in an alternative mode under the control of a synchronous control circuit. So that insufficient coverage of a base station is made up, the coverage area of the base station is extended and communication blind district is eliminated, and the traffic load of a free base station is increased, or the fiber-optical repeater can share the traffic of a busy base station. Moreover, the base station can keep accurate synchronization with the base station, effectively enlarge coverage area, eliminate coverage blind district, improve connection quality, and save cost for the laying of TD-SCDMA network of an operator.
Description
Technical field
The utility model relates to a kind of radio frequency transmission technology and synchronous recognition technology of relating to, and especially a kind of TD-SCDMA optical fiber repeater belongs to moving communicating field.
Background technology
Growing along with mobile communication market professionally developed into value-added service from original voice service.Be accompanied by the continuous development of mobile value-added service, the 3G that marches toward (3rd Generation, 3G (Third Generation) Moblie) then is the inevitable choice of mobile operator.With preceding two generation system compare, the principal character of 3-G (Generation Three mobile communication system) is that colourful mobile multi-media service can be provided, its design object is for power system capacity, the better communication quality bigger than second-generation system is provided, want simultaneously to realize better in the world that seamless roam reaches to the user provides the multiple business that comprises speech, data and multimedia etc., and the favorable compatibility of consideration and existing second-generation system.
The 3G standard of International Telecommunication Association's acceptance at present mainly contains following three kinds: WCDMA, CDMA2000 and TD-SCDMA.Wherein on behalf of China's submission, TD-SCDMA admitted by International Telecommunication Association by scientific and technological industry group of Datang Telecom, become one of three big standards of being approved by international community, it also is the standard that unique China has the part intellectual property, obtained the achievement that Chinese Government, Chinese your kind effort support of runing the various aspects of boundary and made in China research and development are reached, for China, it is the major opportunity of adjusting economic structure with autonomous innovation, has great vitality and development potentiality, and deep meaning is also arranged.The TD-SCDMA covering system is particularly suitable for providing in the urban population compact district the big capacity voice of high density, data and multimedia service.The signal that it sends in each terminal of up link is synchronous fully at the base-station demodulator place, realize by software and physical layer design, can make each code channel complete quadrature when despreading of orthogonal intersection like this, do not produce interference each other, overcome the asynchronous CDMA multiple access technology because the code channel signal of each terminal emission arrives the asynchronism(-nization) of base station, cause the nonopiate interference problem of bringing of code channel.
Repeater (being repeater again) belongs to the frequency multiplying arrangement, is to play a kind of radio transmission transferring equipment that signal strengthens in the wireless communication transmissions process.Enlivened since 2006 in domestic TD-SCDMA repeater market.At present, home mobile network operator presents ascendant trend to the demand of TD-SCDMA repeater, mainly be because the popularization of 3G network is perfect, the aggravation of competing between the operator, the client is to the increase in demand of high-quality wireless coverage, and operator increases day by day at the pressure that is born aspect cost benefit, increase investment repayment and the professional income, therefore force operators to strengthen input in the past few years in the time to the wireless coverage solution, to improve its network quality and service quality, thereby increase professional income, improve user's satisfaction rate.
The TD-SCDMA repeater is finished indoor seamless covering engineering with low-cost, high-quality, is a kind of TD-SCDMA mobile network base station covering deficiency that is used for remedying, and enlarges base station range, a kind of effective equipment of filling signal blind area.Because the working frequency range of TD-SCDMA is higher, signal transmission attenuation is bigger, needs to adopt repeater usually.Repeater is that the signal with base station down amplifies and reaches the same frequency amplifying device that expansion covers.Descending weak signal is assigned to indoor diverse location through power splitter, coupler, feeder line etc. after amplifier amplifies, realize indoor covering by duplexer again.Repeater adopts transparent transmission and receives and dispatches simultaneous techniques, neither can take the control channel of TD system, can also improve receive-transmit isolation and effectively eliminate the influence of noise storage to the base station, in the area of coverage customer volume is not influenced.Using the advantage of repeater is not need to increase trunk feeder just can increase coverage, to the cabling well require low, saving feeder line and radiofrequency signal.
The repeater equipment of 2G is by a large amount of utilizations at present, 2G repeater accepted standard is " ETSI EN300609 ", " 900/1800MHz TDMA digital mobile cellular telecommunication net repeater specification requirement and method of measurement " and " repeater specification requirement of 800MHzCDMA digital mobile cellular telecommunication net and method of measurement ", and TD-SCDMA repeater institute accepted standard is " 3GPP TS25.143 " and " repeater specification requirement of TD-SCDMA digital mobile cellular telecommunication net and method of measurement ".
Standard and implementation to conventional repeater and TD-SCDMA repeater compare, and its main difference is:
1, TD-SCDMA is a time-division system, so the accurate frame synchronization with the base station will be realized in the repeater.In the WCDMA of 2G system, 3G system and CDMA2000 system, all be Frequency Division Multiplexing system, i.e. different operating frequencies is adopted in up-downgoing, so its transmission channel difference, equipment all is the isolation that realizes receiving and transmitting signal by duplexer.And TD-SCDMA is a tdd systems, the working frequency range of its up-downgoing is identical, the base station is to realize duplex state by transmitting the up-downgoing data respectively in the different time, and the repeater has only the frame synchronization that keeps height with the base station, just can finish the transparent transmission to base station signal.Thereby the WCDMA system of existing 2G system, 3G and CDMA2000 system get the repeater and can't realize above-mentioned task.
2, because there is the requirement of branch time slot control ALC the TD-SCDMA repeater, can't satisfy system requirements, need to realize branch time slot ALC control requirement according to the special signal format of TD-SCDMA standard with traditional ALC implementation.
3, be time-division system because of the TD-SCDMA system, the operating frequency of its up-downgoing is identical, for avoiding when work self-excitation of TD-SCDMA repeater equipment, receive-transmit isolation to equipment requires high, and must satisfy the requirement of up-downgoing switch speed simultaneously, also can't realize above-mentioned task and the WCDMA system of existing 2G system, 3G and CDMA2000 system get the repeater.
Enlivened since 2006 in domestic TD-SCDMA repeater market.At present, home mobile network operator presents ascendant trend to the demand of TD-SCDMA repeater, mainly be because the popularization of 3G network is perfect, the aggravation of competing between the operator, the client is to the increase in demand of high-quality wireless coverage, and operator increases day by day at the pressure that is born aspect cost benefit, increase investment repayment and the professional income, therefore force operators to strengthen input in the past few years in the time to the wireless coverage solution, to improve its network quality and service quality, thereby increase professional income, improve user's satisfaction rate.
Mobile communication utilizes wireless medium to transmit information, because electromagnetic loss, each signal of base station coverage is limited; In addition, because the shadow effect of radio transmission, cause the behind of some obstacles such as high mountain, building, the woods also often to form covering shadow region and blind zone problem that large-scale tall buildings things such as signal blind zone and mountain area, villa, highway, tourist district, holiday village, market place builet below the ground, hotel etc. are located.The further expansion that also is the bearer service of mobile communications network simultaneously brings adverse effect.Therefore, how the WCDMA system of existing 2G system, 3G and the repeater of CDMA2000 are carried out necessary innovation and improvement, just become research staff's a problem.
Mobile communication utilizes wireless medium to transmit information, because electromagnetic loss, each signal of base station coverage is limited; In addition, because the shadow effect of radio transmission, cause the behind of some obstacles such as high mountain, building, the woods also often to form signal blind zone, covering shadow region and blind zone problem that large-scale tall buildings things such as while mountain area, villa, highway, tourist district, holiday village, market place builet below the ground, hotel etc. are located.The capital is that the further expansion of the bearer service of mobile communications network brings adverse effect.Therefore, how the WCDMA system of existing 2G system, 3G and the repeater of CDMA2000 are carried out necessary innovation and improvement, just become research staff's a problem.
The utility model content
The purpose of the present utility model: aim to provide a kind of novel TD-SCDMA fiber amplifier, reach and remedy covering deficiency in base station among the mobile network, extend base station coverage area, eliminate communication blind district, provide than existing 2G and part 3G product to have more good high-fidelity, multi-functional open network optimisation technique.Both can increase network coverage, and make the covering of donor base station obtain extending, and also can increase the traffic load of idle base station.
This TD-SCDMA optical fiber repeater, it is made of the near-end machine system and the remote termination system that connect by optical fiber, two systems all by one for forming the power subsystem that module provides power supply in the system separately, it is characterized in that: A, described near-end machine system are made up of optical transceiver, power subsystem, monitoring unit, filter, circulator and Modem; Optical transceiver wherein is made of light transmitting element, Wavelength division multiplexing module, light receiving unit and FSK modulation module, described filter and circulator are electrically connected, and behind circulator, there is two paths of signals to be electrically connected with light transmitting element, an end of light receiving unit in the optical transceiver respectively, light transmitting element and the other end of light receiving unit have optical fiber to be connected with wavelength division multiplexer in the optical transceiver respectively again, and another output of this wavelength division multiplexer is connected with remote termination by optical fiber; Monitoring unit is wherein got in touch by electric signal respectively and between modulation module and the Modem, and modulation module is wherein got in touch by electric signal again and between Wavelength division multiplexing module.
B, described remote termination system are made up of optical transceiver, radio-frequency module, filter, power subsystem, monitoring unit and Modem; Optical transceiver wherein is made of light transmitting element, Wavelength division multiplexing module, light receiving unit and modulation module, radio-frequency module is made of power amplifier PA, circulator, low noise amplifier LNA and cpu chip, be electrically connected through circulator between power amplifier PA and the low noise amplifier LNA, another output of circulator is connected to filter, and power amplifier PA and low noise amplifier LNA optical transceiver all and between the cpu chip are got in touch by electric signal simultaneously; Light receiving unit in the optical transceiver wherein links to each other with power amplifier PA in the radio-frequency module, and the light transmitting element links to each other with low noise amplifier LNA in the radio-frequency module; Monitoring unit wherein links to each other with power subsystem and radio-frequency module successively through lead; Simultaneously, this monitoring unit is got in touch by electric signal respectively and between the modulation module in optical transceiver, radio-frequency module, Modem and the optical transceiver, Wavelength division multiplexing module.
This TD-SCDMA optical fiber repeater according to above technical scheme proposition, not only remedy covering deficiency in base station among the mobile network, extend base station coverage area, eliminate communication blind district, provide than existing 2G and the more good high-fidelity of part 3G product, the multifunctional network optimisation technique makes the covering of donor base station obtain extending, also can increase the traffic load of idle base station, or the telephone traffic of sharing busy base station, and energy and base station maintenance precise synchronization, effectively expand the coverage area, eliminate coverage hole, improve speech quality, lay the TD-SCDMA network for operator and reduce cost.
Description of drawings
Fig. 1 is the utility model
Fig. 2 is the utility model near-end machine system configuration schematic diagram;
Fig. 3 is the utility model remote termination system configuration schematic diagram.
Among the figure: the 4-near-end machine 5-remote termination 6-optical fiber 7-filter 8-circulator 9-optical transceiver 9.1-light transmitting element 9.2-Wavelength division multiplexing module 9.3 light receiving unit 9.4FSK modulation module 13-radio-frequency modules of 1-power subsystem 2-monitoring unit 3-Modem4-base station
Embodiment
The execution mode of repeater is described below with reference to the accompanying drawings:
This TD-SCDMA optical fiber repeater, it is made of near-end machine 4 systems and remote termination 5 systems that optical fiber 6 connects, two systems all by one for forming the power subsystem 1 that module provides power supply in the system separately, it is characterized in that:
A, described near-end machine system are made up of optical transceiver 9, power subsystem 1, monitoring unit 2, filter 7, circulator 8 and Modem antenna 3; Optical transceiver 9 wherein is made of light transmitting element 9.1, Wavelength division multiplexing module 9.2, light receiving unit 9.3 and modulation module, described filter 7 and circulator 8 are electrically connected, and behind circulator 8, there is two paths of signals to be electrically connected with light transmitting element 9.1, an end of light receiving unit 9.3 in the optical transceiver 9 respectively, light transmitting element 9.1 and the other end of light receiving unit 9.3 have optical fiber to be connected with wavelength division multiplexer 9.2 in the optical transceiver 9 respectively again, and another output of this wavelength division multiplexer 9.2 is connected with remote termination by optical fiber; Monitoring unit 2 is wherein got in touch by electric signal respectively and between FSK modulation module 9.4 and the Modem3, FSK modulation module 9.4 wherein again and 9.2 of Wavelength division multiplexing modules get in touch by electric signal.
B, described remote termination system are made up of optical transceiver 9, radio-frequency module 13, filter 7, power subsystem 1, monitoring unit 2 and Modem3; Optical transceiver 9 wherein is made of light transmitting element 9.1, Wavelength division multiplexing module 9.2, light receiving unit 9.3 and modulation module, radio-frequency module 13 is made of power amplifier PA, circulator 8, low noise amplifier LNA and cpu chip, be electrically connected through circulator 8 between power amplifier PA and the low noise amplifier LNA, circulator 8 another outputs are connected to filter 7, and power amplifier PA and low noise amplifier LNA optical transceiver 9 all and between the cpu chip are got in touch by electric signal simultaneously; Light receiving unit 9.3 in the optical transceiver 9 wherein links to each other with power amplifier PA in the radio-frequency module 13, and light transmitting element 9.1 links to each other with low noise amplifier LNA in the radio-frequency module 13; Monitoring unit 2 wherein links to each other with power subsystem 1 and radio-frequency module 13 successively through lead; Simultaneously, this monitoring unit 2 is got in touch by electric signal respectively and between the modulation module 9.4 in optical transceiver 9, radio-frequency module 13, Modem3 and the optical transceiver 9, Wavelength division multiplexing module 9.2.
This TD-SCDMA optical fiber repeater is divided into the uplink and downlink two paths of signals, alternation under the control of synchronization control circuit.
Down link: the radiofrequency signal of sending here from the base station is connected to the descending input port B S of optical fiber repeater near-end machine by cable; Pass through cavity body filter then, entering circulator after the outside spurious signal filtering, by behind the circulator signal being divided into up-downgoing, after downstream signal enters optical transceiver, convert the electrical signal to light signal, pass in the remote termination by optical fiber, remote termination receives the light signal that transmits from near-end, enter optical transceiver and it is reduced into the signal of telecommunication by the photoelectricity conversion, be input in the radio-frequency module, carry out signal by the descending high linear power amplifier in the radio-frequency module and amplify, the output signal after the power amplification is again through cavity body filter filtering, make indexs such as spurious emissions and the outer inhibition of band reach best, pass through output port MS power output at last to retransmitting antenna.
Up link: the radiofrequency signal that antenna receives enters in the radio-frequency module by after the cavity body filter filtering, is amplified by the low noise amplifier in the radio-frequency module, to guarantee good noise factor and performance; The output signal of low noise amplifier enters optical transceiver, and electrical signal conversion becomes light signal, delivers to the near-end machine by optical fiber, the near-end machine receives light signal, the input optical transceiver is reduced into the signal of telecommunication to light signal through opto-electronic conversion, by behind the filter filtering, delivers to the base station through the BS port again.In this process, the Synchronization Control part in the monitoring module is according to the frame slot Characteristics Control power amplifier and the low noise amplifier time-sharing work of signal.
The signal of base station because optical fiber repeater directly is coupled, quality of signals is purer, and signal strength signal intensity is also more stable, so adopt the mode of envelope detection to realize that the transmitting-receiving of repeater and base station is synchronous, this mode maturation that possesses skills, cost is low, the characteristics that the circuit reliability is high.
The functional description of each module is as follows in the equipment:
Radio-frequency module is highly integrated module, and the functions such as control of up low noise amplifier, descending high linear power amplifier and signal extraction, Intelligent Measurement control, synchro switch pipe are provided.
Optical transceiver module: realize the mutual conversion between the signal of telecommunication and the light signal, and the wavelength division multiplexing of different wave length light signal, and can pass through the FSK modulation function, realize the Monitoring and Controlling of near-end machine to remote termination.
Monitoring communications processing unit (containing synchronous control unit): integrated Synchronization Control and monitoring communications are handled the function of two parts.Function one: the signal of the descending input power gained that will be coupled amplifies, and synchronous control signal is handled out in detection, and corresponding module is carried out Synchronization Control.Function two: unified monitoring system various piece, mainly be that control, alarm, the queried for items of information such as radio-frequency module, gate inhibition, external interface, ambient temperature are carried out being processed into the agreement that computer can directly be handled, also be responsible for remote monitoring and local serial ports control task simultaneously, and provide external interface to carry out communication to computer.The concrete function of this part, principle and implementation see associated description in the annex six-2 for details.
Power subsystem: after this equipment input voltage is the 220V electric main, after the process lightning protection device carries out the surge absorption, deliver to Switching Power Supply, Switching Power Supply output direct current 28V and direct current 9V voltage, comprise radio frequency unit, lock unit for the source module that has in the repeater, monitoring unit, wireless MODEN provide power supply, and Switching Power Supply also provides battery impulse electricity control circuit, external battery unit is controlled, provided the monitoring and detection port to offer the monitoring communications processing unit simultaneously and carry out voltage monitoring.
Filter: provide filtration, the outer spurious signal of inhibition zone to the working band external signal.
Modem: the wireless monitor function mainly by add in the alms giver port directional coupler with a signal of base station coupling part in the equipment among the Modem, make Modem to communicate by this two-way link, to reach the effect that facility information is in time fed back to office side by the wireless base station with home base stations.
The TD-SCDMA optical fiber repeater can provide radio-frequency enabled good, high-fidelity, and energy and base station maintenance precise synchronization, effectively expands the coverage area, and eliminates coverage hole, improves speech quality, lays the TD-SCDMA network for operator and reduces cost.These series of products are easy for installation, preparation is flexible, are applicable to the TD-SCDMA mobile communication system.Product designs according to relevant specification of country, and its technical performance and quality all reach the networking index request of the Ministry of Information industry.More because its small investment, installs simple and direct, dependable performance, the easy to maintenance and specific demand of especially suitable Chinese market.
In order to guarantee the reaction speed of equipment, satisfy the time slot controlled function.In mainly containing source module, radio-frequency (RF) switch, ATT control circuit, detector amplifier etc. have all used the components and parts of high-speed low time delay; Adopted the power detector of effective value type, made power detection and ALC precise control.By high speed ATT control and executive circuit, can guarantee equipment automatic time-slot level control (ASLC).Automatic time-slot level control range is greater than 10dB;
Switch the uplink and downlink link by distinctive power-supply management system with the power supply of switching the uplink and downlink circuit, to obtain maximum receive-transmit isolation.Because the TD-SCDMA system is a time-division system, general method for designing is to realize the switching of uplink downlink by the combination of radio-frequency (RF) switch and circulator.We have increased distinctive power-supply management system on this basis, guarantee that the electric power system of relevant link acts on simultaneously, so both can reduce the power consumption of equipment, can also increase receive-transmit isolation in the radio-frequency (RF) switch action.The original equipment isolation is about about 50dB, can reach 57dB now, and isolation has increased by 2 grades.
Since in the radio-frequency (RF) power amplification circuit bigger decoupling capacitor is arranged, the power supply of direct close power amplifier, and the impulse electricity process of electric capacity can be slowed down the reaction speed of link, and the switch speed of link is needed about 5us, can not satisfy system requirements.Go to the position of lotus root electric capacity by change, the lotus root electric capacity position of going of routine is moved to before the power transfer relay from power tube is other, make the action of the power supply of close power amplifier can not influence the reaction speed of link, the reaction time of guaranteeing link switchover minimizes, and has satisfied the requirement of equipment switch speed.The reaction time of link switchover is controlled at about 0.8us, guarantees when obtaining best receive-transmit isolation, also to have satisfied the requirement of switch speed.
Finish the system synchronization that up-downgoing is switched between repeater and base station by in the envelope detection Synchronization Design, having added matched filtering method and anti-interference algorithm.
Equipment adopts the envelope detection method of synchronization, it is a kind of real-time method of synchronization, just be meant that the TD-SCDMA relay amplifier uses the real effective detector arrangement that descending input signal is taken a sample, extract the envelope variation of TD-SCDMA signal, and as physical basis, convert digital signal to, adopt FPGA to realize search, tracking and the clock synchronization processing of downlink frame synchronous head then; Again according to the characteristics of TD-SCDMA frame structure, standard frame in TD-SCDMA is mated, utilize feature window method to obtain the position of first switching point, find the initial moment of TD-SCDMA signal, thereby produce uplink and downlink Switch Control signal, and guarantee that the switch switching point of relay amplifier and TD-SCDMA network keep precise synchronization.
Because existing with footwork, envelope detection is subject to frequency and the adjacent defective of disturbing frequently.Set up the false synchronous probability in the process synchronously and improve first transfer point foundation synchronously antijamming capability later in order to reduce first transfer point, we have creatively added matched filtering method and synchronous anti-interference algorithm when the envelope detection Synchronization Design.This unique design scheme makes synchronous antijamming capability increase by 10 times, has captured the technological difficulties of project most critical.Realized the precise synchronization of equipment and base station.For being output as the TD optical fiber direct amplification station equipment of 5W, the coincident indicator of technology is:
A) repeater power amplifier synchronozing sensitivity≤-35dBm;
B) power amplifier start-up thresholding adjusting range reaches 20dB;
C) Timing Advance opened of repeater up-downgoing and hysteresis＞2us of shut-in time;
D) transfer point of up-downgoing switch drops on mutually deserved up-downgoing transfer point interval 〉=3us in the TD-SCDMA frame.Supervisory control system has been used the two-stage house dog, comprises inner house dog of CPU and external hardware watchdog chip, has stopped the possibility of TD repeater monitors system in case of system halt, has improved the reliability of whole system;
● supervisory control system uses CPLD to realize expansion to UART and I/O mouth because CPLD can carry out input and output definition, the definition of inner combinational logic to port flexibly, greatly improved system can design, upgradability and adaptive capacity;
● use jumbo nickel-hydrogen chargeable cell group and intelligentized charging circuit back-up source as the TD direct amplifying station monitoring, charging circuit comprises overcharging and function such as over to rechargeable battery, improve the preparation time and the useful life of back-up source, guaranteed the reliability of back-up source; In case the normal power supply system of equipment takes place to have a power failure or fault, back-up source can guarantee the supervisory control system operate as normal, and concurrent looks is answered warning information.
Prime adopts the low noise Linear magnifying technology in high in the design of repeater, guarantees that the signal that receives amplifies the back and also has good signal-to noise ratio
Equipment is made of the reflective module of series connection; the input/output port of module is set about the control port standing wave from capacitive character and inductive mutual compensation of high-frequency circuit; add isolator in the active modular design of part; to improve matching and to protect related device; mutually coupling makes the standing wave of equipment functional, make various microwave signals in system as far as possible to go the state transfer of ripple.
Use the technology of sintering, the driving tube and the power tube of radio frequency directly is welded on the copper coin, make driving tube and power tube that good ground connection be arranged, guarantee that the radio-frequency performance index is stable.Simultaneously, driving tube and power tube have good radiating condition, and product is reliable.
This product has passed through the test at Country Radio Monitoring Center, China Telecommunication Technology Labs. Ministry of Information Industry wireless communications products quality supervision and test center and the compatible quality supervision and test of Ministry of Information Industry's communication electromagnetism center, and has obtained the licence for entry to network that approval certificate for the model that national nothing committee issues and Information Industry Department issue.By comparing with domestic like product, the repeater that our company produces noise factor, linear power output, Adjacent Channel Leakage Power Ratio, output intermodulation, switching time aspect such as accuracy, receive-transmit isolation, modulation accuracy and the power amplifier switch stability of synchronization all be in advanced level.
This product can satisfy national communication industry standard YD/T 1711-2007 " repeater specification requirement of 2GHzTD-SCDMA digital mobile cellular telecommunication net and method of measurement " with the index of guaranteeing complete machine.
Claims (1)
1, a kind of TD-SCDMA optical fiber repeater, it is made of near-end machine (4) system and remote termination (5) system that optical fiber (6) connects, and two systems all provide the power subsystem of power supply (1) by one for forming module in the system separately, it is characterized in that:
A, described near-end machine system are made up of optical transceiver (9), power subsystem (1), monitoring unit (2), filter (7), circulator (8) and Modem (3); Optical transceiver wherein (9) is by light transmitting element (9.1), Wavelength division multiplexing module (9.2), light receiving unit (9.3) and modulation module constitute, described filter (7) and circulator (8) are electrically connected, and behind circulator (8), have two paths of signals respectively with optical transceiver (9) in light transmitting element (9.1), one end of light receiving unit (9.3) is electrically connected, light transmitting element (9.1) and the other end of light receiving unit (9.3) have optical fiber to be connected with wavelength division multiplexer (9.2) in the optical transceiver (9) respectively again, and another output of this wavelength division multiplexer (9.2) then is connected with remote termination by optical fiber; Monitoring unit wherein (2) is got in touch by electric signal respectively and between modulation module (9.4) and the Modem antenna (3), and modulation module wherein (9.4) is got in touch by electric signal again and between Wavelength division multiplexing module (9.2);
B, described remote termination system are made up of optical transceiver (9), radio-frequency module (13), filter (7), power subsystem (1), monitoring unit (2) and Modem (3); Optical transceiver wherein (9) is made of light transmitting element (9.1), Wavelength division multiplexing module (9.2), light receiving unit (9.3) and modulation module, radio-frequency module (13) is made of power amplifier PA, circulator (8), low noise amplifier LNA and cpu chip, be electrically connected through circulator (8) between power amplifier PA and the low noise amplifier LNA, another output of circulator (8) is connected to filter (7), and power amplifier PA and low noise amplifier LNA optical transceiver (9) all and between the cpu chip are got in touch by electric signal simultaneously; Light receiving unit (9.3) in the optical transceiver wherein (9) links to each other with power amplifier PA in the radio-frequency module (13), and light transmitting element (9.1) links to each other with low noise amplifier LNA in the radio-frequency module (13); Monitoring unit wherein (2) links to each other with power subsystem (1) and radio-frequency module (13) successively through lead; Simultaneously, this monitoring unit (2) respectively and the modulation module (9.4) in optical transceiver (9), radio-frequency module (13), Modem (3) and the optical transceiver (9), Wavelength division multiplexing module get in touch by electric signal between (9.2).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011120428A1 (en) * | 2010-04-02 | 2011-10-06 | 中兴通讯股份有限公司 | Connection device and method between base band unit and remote radio unit |
| CN103313271A (en) * | 2013-05-24 | 2013-09-18 | 南京泰通电子科技有限公司 | Tunnel TD-LTE (Time Division Long Term Evolution) fiber-distributed covering system and working method thereof |
| CN108809416A (en) * | 2018-05-28 | 2018-11-13 | 电子科技大学 | A kind of remote base station latency measurement system and method based on short fiber calibration |
| CN112564782A (en) * | 2019-09-26 | 2021-03-26 | 中国电信股份有限公司 | Repeater detection method, device, network management system and storage medium |
| CN115021820A (en) * | 2022-06-06 | 2022-09-06 | 中邮科通信技术股份有限公司 | 5G optical fiber remote system and method supporting multi-band simultaneous transmission |
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2008
- 2008-11-28 CN CNU2008201561183U patent/CN201328119Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011120428A1 (en) * | 2010-04-02 | 2011-10-06 | 中兴通讯股份有限公司 | Connection device and method between base band unit and remote radio unit |
| CN102215606A (en) * | 2010-04-02 | 2011-10-12 | 中兴通讯股份有限公司 | Device and method for connecting baseband unit and radio frequency unit |
| CN102215606B (en) * | 2010-04-02 | 2016-05-25 | 中兴通讯股份有限公司 | Jockey between Base Band Unit and radio frequency unit and method |
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| CN108809416A (en) * | 2018-05-28 | 2018-11-13 | 电子科技大学 | A kind of remote base station latency measurement system and method based on short fiber calibration |
| CN108809416B (en) * | 2018-05-28 | 2019-10-18 | 电子科技大学 | A kind of remote base station latency measurement system and method based on short fiber calibration |
| CN112564782A (en) * | 2019-09-26 | 2021-03-26 | 中国电信股份有限公司 | Repeater detection method, device, network management system and storage medium |
| CN112564782B (en) * | 2019-09-26 | 2022-03-11 | 中国电信股份有限公司 | Repeater detection method, device, network management system and storage medium |
| CN115021820A (en) * | 2022-06-06 | 2022-09-06 | 中邮科通信技术股份有限公司 | 5G optical fiber remote system and method supporting multi-band simultaneous transmission |
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