CN201274479Y - Optical fiber repeater for TD-SCDMA mobile communication - Google Patents
Optical fiber repeater for TD-SCDMA mobile communication Download PDFInfo
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- CN201274479Y CN201274479Y CNU2008201453808U CN200820145380U CN201274479Y CN 201274479 Y CN201274479 Y CN 201274479Y CN U2008201453808 U CNU2008201453808 U CN U2008201453808U CN 200820145380 U CN200820145380 U CN 200820145380U CN 201274479 Y CN201274479 Y CN 201274479Y
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- amplifying circuit
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- fiber repeater
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Abstract
The utility model provides a TD-SCDMA mobile communication fiber optic repeater, in which a baseband decoding synchronic control unit and a synchronic converting circuit are added in the near-end computer of an original fiber optic repeater, and a synchronic acquisition circuit and a synchronic control unit are also added in the far-end computer of the original fiber optic repeater. The utility model is characterized in that the near-end computer of the fiber optic repeater adopts the method of baseband decoding synchronization and uses the ASK modulation to transmit near-end synchronic signals to the far-end computer of the fiber optic repeater, thereby not only guaranteeing the high and reliable synchronization performance of the fiber optic repeater, but also greatly reducing the equipment cost.
Description
[technical field]
The utility model relates to a kind of mobile communication equipment, particularly a kind of TD-SCDMA (TD SDMA access) optical fiber repeater.
[background technology]
When using the TD-SCDMA system and carry out networking, with the 2nd generation or the 2.5th generation communication system compare because its operating frequency is higher, the spatial transmission of signal and feeder line loss will be bigger also.For the signal blind zone that solves various complex-terrains such as market place builet below the ground, subway, tunnel, highway, island and the network coverage in weak district, need improve existing direct discharging station.Because the extension of adopting direct discharging station to carry out the network coverage has the following advantages: the one, its cost is well below the base station system that effect same is arranged, the 2nd, it with the base station structure compared simply and easy for installation.So important effect will be played in the repeater in the 3G (Third Generation) Moblie covering system.
The uplink and downlink amplifying circuit of TD-SCDMA system is worked by time-multiplexed mode, can change the time slot switching point flexibly according to different service needed, thereby satisfies the demand of uplink and downlink non-symmetrical service.These uplink and downlink to the TD-SCDMA repeater have very high requirement synchronously.
[utility model content]
Technical problem to be solved in the utility model is to provide a kind of complete synchronous TD-SCDMA mobile communication optical fiber repeater of near, remote termination of having realized.
The utility model solves the problems of the technologies described above by the following technical programs: a kind of TD-SCDMA mobile communication optical fiber repeater, comprise an optical fiber repeater near-end machine that directly is of coupled connections with the base station, an optical fiber repeater remote termination, both transmit by optical fiber, described optical fiber repeater near-end machine comprises cavity body filter, coupling circuit, radio-frequency (RF) switch, up amplifying circuit, descending amplifying circuit, optical transceiver and near-end supervisory control system, described cavity body filter, coupling circuit, radio-frequency (RF) switch links to each other successively, the two ends of up amplifying circuit and descending amplifying circuit are connected respectively to radio-frequency (RF) switch and optical transceiver, described optical fiber repeater remote termination comprises optical transceiver, up amplifying circuit, descending amplifying circuit, circulator, cavity body filter and far-end monitoring system, the two ends of described up amplifying circuit and descending amplifying circuit are connected respectively to optical transceiver and circulator, cavity body filter is connected the rear end of circulator, it is characterized in that: described optical fiber repeater near-end machine also comprises the baseband decoding synchronous control unit, synchronous change-over circuit, described optical fiber repeater remote termination also comprises synchronous acquisition cuicuit, synchronous control unit;
Wherein in the optical fiber repeater near-end machine, the input of baseband decoding synchronous control unit is connected to coupling circuit, output is connected respectively to radio-frequency (RF) switch, up amplifying circuit, descending amplifying circuit, and synchronous change-over circuit, the output of described synchronous change-over circuit is connected to descending amplifying circuit;
In the optical fiber repeater remote termination, the input of acquisition cuicuit is connected to descending amplifying circuit synchronously, and output is connected to synchronous control unit, and the output of synchronous control unit is connected respectively to up amplifying circuit and descending amplifying circuit.
In the described optical fiber repeater near-end machine:
Its up amplifying circuit comprises numerical-control attenuator and the back level amplifying unit that connects successively, and the input of described numerical-control attenuator is connected to optical transceiver, and the output of back level amplifying unit is connected to radio-frequency (RF) switch;
Its descending amplifying circuit comprises numerical-control attenuator, driving amplifying unit and the coupling circuit that connects successively, and the input of described numerical-control attenuator is connected to radio-frequency (RF) switch, and the output of described coupling circuit is connected to optical transceiver;
The output of described baseband decoding synchronous control unit is connected respectively to the back level amplifying unit of up amplifying circuit and the driving amplifying unit of descending amplifying circuit.
In the described optical fiber repeater remote termination:
Its up amplifying circuit comprises LNA unit, numerical-control attenuator, automatic time-slot electrical level control unit and the intermediate amplifying unit that connects successively, the input of described LNA unit is connected to circulator, and the output of intermediate amplifying unit is connected to optical transceiver;
Its descending amplifying circuit comprises coupler, numerical-control attenuator, automatic time-slot electrical level control unit, driving amplifying unit and the power amplifier unit that connects successively, and the input of described coupler is connected to optical transceiver, and the output of power amplifier unit is connected to circulator;
The input of described synchronous acquisition cuicuit is connected to the coupler of descending amplifying circuit, and the output of described synchronous control unit is connected respectively to automatic time-slot electrical level control unit, driving amplifying unit and the power amplifier unit of automatic time-slot electrical level control unit, LNA unit and the descending amplifying circuit of up amplifying circuit.
The advantage of a kind of TD-SCDMA mobile communication of the utility model optical fiber repeater is: adopt the baseband decoding method of synchronization in the near-end machine of optical fiber repeater, guaranteed synchronous high reliability; In the remote termination of optical fiber repeater, nearly terminal is modulated by Optical Fiber Transmission to remote termination through ASK by baseband decoding acquisition synchronizing signal, to obtain synchronizing information, realized near, remote termination fully synchronously, can realize the switching of uplink and downlink time slot accurately and stably guaranteeing the optical fiber direct amplification station equipment, to finish under the prerequisite to the seamless amplification of TD-SCDMA signal and forwarding capability, greatly reduce equipment cost.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is a kind of TD-SCDMA mobile communication of the utility model optical fiber repeater near-end machine theory diagram.
Fig. 2 is a kind of TD-SCDMA mobile communication of the utility model optical fiber repeater remote termination theory diagram.
[embodiment]
A kind of TD-SCDMA mobile communication of the utility model optical fiber repeater comprises an optical fiber repeater near-end machine that directly is of coupled connections with the base station, an optical fiber repeater remote termination, optical fiber repeater near-end machine and optical fiber repeater remote termination transmit by optical fiber.
See also Fig. 1, this optical fiber repeater near-end machine comprises cavity body filter 1, coupling circuit 2, baseband decoding synchronous control unit 3, synchronous change-over circuit 4, RF (radio frequency) switch 5, up amplifying circuit 6, descending amplifying circuit 7, optical transceiver 8 and near-end supervisory control system 9; Described up amplifying circuit 6 comprises numerical-control attenuator 62, back level amplifying unit 64, and described descending amplifying circuit 7 comprises numerical-control attenuator 72, drives amplifying unit 74 and coupling circuit 76.
See also Fig. 2, this optical fiber repeater remote termination comprises optical transceiver 10, synchronous acquisition cuicuit 20, synchronous control unit 30, up amplifying circuit 40, descending amplifying circuit 50, circulator 60, cavity body filter 70 and far-end monitoring system 80; Described up amplifying circuit 40 comprises LNA unit 42, numerical-control attenuator 44, ASLC (automatic time-slot electrical level control unit) 46 and intermediate amplifying unit 48, and described descending amplifying circuit 50 comprises coupler 52, numerical-control attenuator 54, ASLC 55, drives amplifying unit 56 and power amplifier unit 58.
In the optical fiber repeater near-end machine of Fig. 1, after base station signal passes through the outer unwanted signal of cavity body filter 1 filtering band, through coupling circuit 2, one the tunnel inputs to baseband decoding synchronous control unit 3, obtain synchronizing information, another road inputs to RF switch 5, RF switch 5 is finished up amplifying circuit 6, descending amplifying circuit 7 carries out the control that up-downgoing is switched synchronously, simultaneously synchronizing signal is input to synchronous change-over circuit 4, change-over circuit 4 is finished the synchronizing signal that receives is carried out ASK (Amplitude Shift Keying synchronously, amplitude shift keying) modulates, then this modulation signal is imported the coupling circuit 76 of descending amplifying circuit 7, transfer to the optical fiber repeater remote termination.
When the TD-SCDMA base station is operated in when descending, RF switch 5 switches to descending amplifying circuit 7, closes up amplifying circuit 6.Base station signal is through cavity body filter 1, coupling circuit 2, enter down link through RF switch 5 again, drive amplifying unit 74 amplifications through entering behind the numerical-control attenuator 72, again behind coupling circuit 76 coupled synchronization modulation signals, importing optical transceiver 8 again, is that light signal is transmitted into the optical fiber repeater remote termination with the RF conversion of signals.In like manner, when being operated in when up, RF switch 5 switches to up amplifying circuit 6, closes descending amplifying circuit 7.Optical transceiver 8 will be converted to the RF signal by the uplink optical signal that the optical fiber repeater remote termination transmits, and pass through the numerical-control attenuator 62 and the back level amplifying unit 64 of up amplifying circuit 6 successively, and RF switch 5, coupling circuit 2, cavity body filter 1 are to the output of base station end.
In addition, near-end supervisory control system 9 is finished the functions such as various parameter queries, control and fault management of optical fiber repeater near-end machine; And finish transmitting-receiving Communication Control to the optical fiber repeater remote termination; All right remote transmission status information of equipment is given the Surveillance center of base station, and Surveillance center can realize the control setting to optical fiber repeater near-end machine parameters.
In the optical fiber repeater remote termination of Fig. 2, optical transceiver 10 is converted to the RF downstream signal with the light signal that receives and is input to down link, is that light signal sends to optical fiber repeater near-end machine with the RF conversion of signals of up link.
By coupler 52 one road coupled signal is inputed to synchronous acquisition cuicuit 20 at down link, the ASK modulation signal that synchronous 20 pairs of acquisition cuicuits receive carries out correlation demodulation, after extracting synchronizing signal, behind synchronous control unit 30, carry out sequential processing again, final output synchronous control signal is realized the synchronous transmitting-receiving control to each unit of optical fiber repeater remote termination uplink downlink.
The downstream signal that down link is finished the output of optical fiber repeater near-end machine carries out power amplification, pass through coupler 52, numerical-control attenuator 54, ASLC 55, driving amplifying unit 56, the power amplifier unit 58 of descending amplifying circuit 50 successively, through circulator 60 isolation, cavity body filter 70 filtering, be transmitted into capped end again by antenna.The low noise that up link is finished user terminal signal amplifies, isolate through cavity body filter 70 filtering, circulator 60 successively, pass through the LNA unit 42 of up amplifying circuit 40 again, numerical-control attenuator 44, ASLC 46, intermediate amplifying unit 48 are changed by Optical Fiber Transmission to optical fiber repeater near-end machine through optical transceiver 10 again.
Far-end monitoring system 80 is finished the functions such as various parameter queries, control and fault management of optical fiber repeater remote termination, and through the transmitting-receiving communication of optical transceiver 10 conversions by Optical Fiber Transmission realization and near-end supervisory control system 9.
Though more than described embodiment of the present utility model; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than be used for qualification to scope of the present utility model; those of ordinary skill in the art are in the modification and the variation of the equivalence of doing according to spirit of the present utility model, all should be encompassed in the scope that claim of the present utility model protects.
Claims (3)
1. TD-SCDMA mobile communication optical fiber repeater, comprise an optical fiber repeater near-end machine that directly is of coupled connections with the base station, an optical fiber repeater remote termination, both transmit by optical fiber, described optical fiber repeater near-end machine comprises cavity body filter, coupling circuit, radio-frequency (RF) switch, up amplifying circuit, descending amplifying circuit, optical transceiver and near-end supervisory control system, described cavity body filter, coupling circuit, radio-frequency (RF) switch links to each other successively, the two ends of up amplifying circuit and descending amplifying circuit are connected respectively to radio-frequency (RF) switch and optical transceiver, described optical fiber repeater remote termination comprises optical transceiver, up amplifying circuit, descending amplifying circuit, circulator, cavity body filter and far-end monitoring system, the two ends of described up amplifying circuit and descending amplifying circuit are connected respectively to optical transceiver and circulator, cavity body filter is connected the rear end of circulator, it is characterized in that: described optical fiber repeater near-end machine also comprises the baseband decoding synchronous control unit, synchronous change-over circuit, described optical fiber repeater remote termination also comprises synchronous acquisition cuicuit, synchronous control unit;
Wherein in the optical fiber repeater near-end machine, the input of baseband decoding synchronous control unit is connected to coupling circuit, output is connected respectively to radio-frequency (RF) switch, up amplifying circuit, descending amplifying circuit, and synchronous change-over circuit, the output of described synchronous change-over circuit is connected to descending amplifying circuit;
In the optical fiber repeater remote termination, the input of acquisition cuicuit is connected to descending amplifying circuit synchronously, and output is connected to synchronous control unit, and the output of synchronous control unit is connected respectively to up amplifying circuit and descending amplifying circuit.
2. a kind of TD-SCDMA mobile communication optical fiber repeater as claimed in claim 1 is characterized in that: in the described optical fiber repeater near-end machine:
Its up amplifying circuit comprises numerical-control attenuator and the back level amplifying unit that connects successively, and the input of described numerical-control attenuator is connected to optical transceiver, and the output of back level amplifying unit is connected to radio-frequency (RF) switch;
Its descending amplifying circuit comprises numerical-control attenuator, driving amplifying unit and the coupling circuit that connects successively, and the input of described numerical-control attenuator is connected to radio-frequency (RF) switch, and the output of described coupling circuit is connected to optical transceiver;
The output of described baseband decoding synchronous control unit is connected respectively to the back level amplifying unit of up amplifying circuit and the driving amplifying unit of descending amplifying circuit.
3. a kind of TD-SCDMA mobile communication optical fiber repeater as claimed in claim 1 or 2 is characterized in that: in the described optical fiber repeater remote termination:
Its up amplifying circuit comprises LNA unit, numerical-control attenuator, automatic time-slot electrical level control unit and the intermediate amplifying unit that connects successively, the input of described LNA unit is connected to circulator, and the output of intermediate amplifying unit is connected to optical transceiver;
Its descending amplifying circuit comprises coupler, numerical-control attenuator, automatic time-slot electrical level control unit, driving amplifying unit and the power amplifier unit that connects successively, and the input of described coupler is connected to optical transceiver, and the output of power amplifier unit is connected to circulator;
The input of described synchronous acquisition cuicuit is connected to the coupler of descending amplifying circuit, and the output of described synchronous control unit is connected respectively to automatic time-slot electrical level control unit, driving amplifying unit and the power amplifier unit of automatic time-slot electrical level control unit, LNA unit and the descending amplifying circuit of up amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201453808U CN201274479Y (en) | 2008-08-29 | 2008-08-29 | Optical fiber repeater for TD-SCDMA mobile communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201453808U CN201274479Y (en) | 2008-08-29 | 2008-08-29 | Optical fiber repeater for TD-SCDMA mobile communication |
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| Publication Number | Publication Date |
|---|---|
| CN201274479Y true CN201274479Y (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201453808U Expired - Fee Related CN201274479Y (en) | 2008-08-29 | 2008-08-29 | Optical fiber repeater for TD-SCDMA mobile communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523029A (en) * | 2011-12-27 | 2012-06-27 | 成都芯通科技股份有限公司 | Digital enclave system |
| CN102611507A (en) * | 2011-12-26 | 2012-07-25 | 深圳市虹远通信有限责任公司 | Full-synchronizing TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) optical-fiber amplification system |
| CN113438725A (en) * | 2021-06-23 | 2021-09-24 | 深圳凡维泰科技服务有限公司 | Near-far end synchronizer of 5G frequency shift room subsystem |
-
2008
- 2008-08-29 CN CNU2008201453808U patent/CN201274479Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611507A (en) * | 2011-12-26 | 2012-07-25 | 深圳市虹远通信有限责任公司 | Full-synchronizing TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) optical-fiber amplification system |
| CN102611507B (en) * | 2011-12-26 | 2014-12-31 | 深圳市虹远通信有限责任公司 | Full-synchronizing TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) optical-fiber amplification system |
| CN102523029A (en) * | 2011-12-27 | 2012-06-27 | 成都芯通科技股份有限公司 | Digital enclave system |
| CN102523029B (en) * | 2011-12-27 | 2014-04-23 | 成都芯通科技股份有限公司 | Digital enclave system |
| CN113438725A (en) * | 2021-06-23 | 2021-09-24 | 深圳凡维泰科技服务有限公司 | Near-far end synchronizer of 5G frequency shift room subsystem |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20150829 |
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| EXPY | Termination of patent right or utility model |