CN1457160A - Direct transmitting station for synchronous CDMA system and its control - Google Patents
Direct transmitting station for synchronous CDMA system and its control Download PDFInfo
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- CN1457160A CN1457160A CN 02160279 CN02160279A CN1457160A CN 1457160 A CN1457160 A CN 1457160A CN 02160279 CN02160279 CN 02160279 CN 02160279 A CN02160279 A CN 02160279A CN 1457160 A CN1457160 A CN 1457160A
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Abstract
The invention discloses passing through stations in SCDMA mobile communication system and its controlling method in order to complete frequency translating transpondering function so as to solve the issue of covering blind zone for base stations in SCDMA system. The passing through station in SCDMA mobile communication includes a casing one interface for input power source, two radio frequency modules, one control module including a handset board, a digital signal processor, a field programmable gate array, a D/A and A/D converter. The controlling method of the passing through station is to control the operation of the radio frequency circuit in TDD mode controlled by DSP and FPGA.
Description
Technical field
The present invention relates to a kind of repeater and control method thereof of communication system, particularly a kind of repeater and control method thereof that is used for synchonism CDMA mobile communication system.
Background technology
In moving communicating field, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) has merged advanced technologies such as TDD (Time DivisionDuplex, time division multiplexing), smart antenna, synchronization CDMA, software radio, becomes the international mobile communication standard of a kind of third generation.When the application TDS-CDMA system is carried out networking; also can run into the problem of coverage hole; because in the communication process of signal; run into obstacle through regular meeting; as building, mountain range, various complex-terrains etc.; at the back side of obstacle and the inside of various underground structures, in market place builet below the ground, subway, tunnel, because signal can not cover the generation communication blind district.In order to solve blind zone problem, suppose that the base station cost is too high, and some local discomfort builds machine room and iron tower jointly, so selecting for use of repeater is just significant.
What Fig. 1 represented is the use schematic diagram of repeater in mobile communication system, the repeater is an indispensable part in this system, mainly finish the frequency conversion of wireless signal between base station 5 and the terminal 3 and transmit task, utilize donor antenna 6 directly to access base station signal, amplify the back by repeater 1 and cover with retransmitting antenna 2.
The repeater mainly solve this system cover in blind zone problem, comprise pile within doors, various situations such as intensive block, hypogee, complex-terrain zone, also can be used as relay function increases coverage.In GSM, cdma system, all have and adopt the repeater to solve the method that the blind area covers, but GSM repeater, CDMA repeater and 350M Mobile communication direct base station are FDD (Frequency DivisionDuplex, frequency division multiplexing) working method, uplink and downlink are two frequencies, and the working method of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) is the TDD mode, and uplink and downlink are with frequently, are operated in the upstream or downstream state by the timing control signal decision-making circuit.Therefore, existing repeater working frequency range all can not be applied in the TDS-CDMA system, and TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) is operated near the 1800MHZ.
Summary of the invention
Technical problem to be solved by this invention provides a kind of in repeater and control method thereof with the time division synchronous code division multiple access communication system of TDD mode work, realize the frequency conversion forwarding capability of the wireless signal between mobile communication base station and the terminal, thus base station coverage hole problem.
For realizing above goal of the invention, synchonism CDMA mobile communication of the present invention repeater includes: a shell, an input power interface, be used to provide electric power, two antennal interfaces, two RF-IF modules, link to each other with described two antennal interfaces respectively, and the intermediate frequency input port of these two RF-IF modules and the other side's intermediate frequency delivery outlet is interconnected with one another; And a control module, further comprise: a mobile phone board, a digital signal processor, a field programmable gate array, a digital to analog converter and an analog to digital converter; Mobile phone board extracts a synchronous signal and exports this digital signal processor to pulse mode, uses the sequential combinational logic to produce various switch controlling signals through this field programmable gate array again, controls the work of described RF-IF module.
For realizing above goal of the invention, synchonism CDMA mobile communication of the present invention repeater also can include: a storage battery, be used to provide non-firm power, a Switching Power Supply, be used between this input power interface and this storage battery, switching power supply source, a lightning protection for power supply, be connected with described input power interface with described Switching Power Supply, be used for lightning protection; And two lightning protection filters, be connected to respectively and be connected with one of described antennal interface with one of described RF-IF module, be used for lightning protection.
For realizing above goal of the invention, two RF-IF modules in the synchonism CDMA mobile communication of the present invention repeater can be used independently local frequency separately, and the mode that adopts shift frequency to amplify is worked.
For realizing above goal of the invention, two RF-IF modules in the synchonism CDMA mobile communication of the present invention repeater also can comprise an automatic gain control section, and the signal that antenna is received carries out automatic gain.
For realizing above goal of the invention, can be provided with shielding box separately outside the input power interface in the synchonism CDMA mobile communication of the present invention repeater, antennal interface, RF-IF module, the control module.
The present invention also provides the control method of a kind of synchonism CDMA mobile communication repeater, utilize the work of radio circuit under DSP and the FPGA control tdd mode, implementation step is: (1) utilizes mobile phone board to extract the base station synchronization signal, and with this synchronisation source as the repeater; (2) field programmable gate array produces various switch controlling signals according to synchronizing signal, the work of control radio circuit; (3) mobile phone board in the repeater is realized the monitoring to directly putting, and the running parameter of repeater is obtained from webmaster by mobile phone board, by digital signal processor and field programmable gate array described parameter is set in the circuit.Simultaneously, mobile phone board is uploaded webmaster with the operating state and the warning information of repeater.
Be further to explain purpose of the present invention, feature and advantage, below be elaborated by preferred embodiment and conjunction with figs..
Description of drawings
Fig. 1 is the use schematic diagram of repeater in mobile communication system;
Fig. 2 is the internal structure schematic diagram of repeater of the present invention;
Fig. 3 is the structural representation of the RF radio-frequency module in the repeater of the present invention;
Fig. 4 is the structural representation of the control module in the repeater of the present invention;
Fig. 5 is the flow chart of DSP processing procedure in the control module;
Fig. 6 is the schematic diagram that the parameter in the control module is provided with module;
Fig. 7 is the process chart of the parameter setting up procedure in the control module
Fig. 8 is a functional block diagram of realizing the part of power monitoring in the control module;
Fig. 9 is the process chart of power monitoring process in the control module;
Figure 10 is the schematic diagram that repeater of the present invention is used for the application mode that the blind area of intensive block covers;
Figure 11 is the schematic diagram that repeater of the present invention is used for the application mode of the blind area covering in the tall and big tier building.
Embodiment
Generally speaking, the repeater mainly solve mobile communication system cover in blind zone problem, comprise pile within doors, various situations such as intensive block, hypogee, complex-terrain zone, also can be used as relay function increases coverage.The major function of repeater comprises, finishes the frequency conversion forwarding capability of the wireless signal between base station and the terminal, realizes automated power control, realizes remote centralized control and monitoring in real time.
The time division synchronous code division multiple access communication repeater belongs to a kind of employing less radio-frequency (RF, RadioFrequency) mode, signal between up (travelling carriage is to the base station), descending (base station is to travelling carriage) is amplified respectively, expand the coverage area, and be transferred to the other side's mobile communication direct amplification machine.
In Fig. 2, disclosed the internal structure of a kind of repeater shown in the present, wherein antennal interface 14 is a N connector; Input power interface 15 is the AC220V power supply.Further comprise in its housing: the radio-frequency module 12 of lightning protection for power supply 19, Switching Power Supply 16, storage battery 17, control module 18, RF-IF base station side radio-frequency module 11 and whole end side, also have lightning protection filter 13, and connecting line etc.
The input power supply of repeater adopts 220V to exchange input, be converted to DC12V through Switching Power Supply 16, supply with control module 18, control module 18 is converted to various required voltages again, supply with control board, mobile phone board 181 and base station side radio-frequency module 11, Switching Power Supply 16 has the power management part simultaneously, gives the 12V storage battery 17 chargings, storage battery 17 adopts 12V-20AH, guarantees that this repeater outage back work is more than 8 hours.
In embodiments of the invention, this RF module is adopted as two identical modules, is respectively the radio-frequency module 12 of base station side radio-frequency module 11 and whole end side.Each module has a duplexed antenna interface, and goes into/go out two intermediate frequency mouths, rectified signal interface and power supply control interface.Local oscillation signal frequency in two modules not simultaneously, base station signal mails to terminal through frequency conversion, the signal that terminal is beamed back is corresponding to be become original frequency and is mail to the base station.
In Fig. 2 and Fig. 3, this repeater is by components and parts or module composition uplink and downlink amplification links such as antenna, radio frequency duplexer, low noise amplifier, frequency mixer, electrically controlled attenuator, filter, power amplifiers.Its its working principles is: with donor antenna the downstream signal of base station is received into direct amplification machine, useful signal is amplified, suppress the noise signal in the signal by low noise amplifier, improve signal to noise ratio (Signal-to-Noiseratio, S/N); Through downconverting to intermediate-freuqncy signal, through filter filtering, intermediate frequency amplifies again, and the shift frequency up-conversion is amplified through power amplifier to radio frequency again, is transmitted into travelling carriage by retransmitting antenna; Utilize retransmitting antenna receiving mobile upward signal simultaneously, along opposite path by up amplification link processing: promptly through low noise amplifier, low-converter, filter, in put, upconverter, power amplifier be transmitted into the base station again.Thereby reach the two-way communication of base station and travelling carriage.
Because the gain of repeater is very high, so can the selection of antenna and installing directly have influence on the repeater operate as normal that touch the mark.Antenna is installed improper, may cause system's self-excitation maybe can't reach design objective, influences the terminal call quality.The base station side antenna also claims donor antenna, receives signal of base station, and terminal signaling mails to the base station by donor antenna after amplify the repeater simultaneously.The end side antenna is also weighed and is sent out antenna, and realization is communicated by letter with terminal.If select the higher antenna of gain, can reduce the requirement of circuit gain, so just reduced the difficulty and the risk of circuit design.Isolation between while two antennas is greater than repeater actual gain+15dB, and the most extreme installation makes two antennas install back-to-back possibly, so will select the directional antenna that lobe width is less, Sidelobe Suppression is good.Based on above-mentioned consideration, donor antenna is selected the palisade parabolic antenna for use, and gain is generally in 20dB～30dB scope, and lobe width is less than 10 degree, and the front and back ratio is greater than 30dB; Retransmitting antenna can be selected plate antenna or ceiling mount antenna according to the repeater installation environment.
When antenna is installed donor antenna to be installed earlier, parabolic antenna is inserted the frequency spectrograph input by cable, open the frequency spectrograph power supply, the base station direction that antenna receives towards desire, press the ＂ reference level ＂ button of frequency spectrograph, till the aerial signal spectral line that shows on the elecscreen is convenient to observe, unclamp corresponding each mechanical fasteners of antenna, substantially under constant prerequisite, comprehensive rotary antenna, be fastened at last on the strongest position of base station signal that original desire receives, and write down the Frequency point and the level of each spectral line this moment.For the parabolic antenna of 1.8 meters of φ, whether the signal level of reception should exceed about 18dB than the level that same position mobile phone board receives, and normal with this operating state of judging donor antenna.
In Fig. 2 and Fig. 3, the base station side radio-frequency module 11 in the repeater of the present invention and the radio-frequency module 12 of whole end side further comprise: down-conversion passage and up-conversion passage.Wherein the radiofrequency signal from antenna end enters the down-conversion passage by radio-frequency (RF) switch 111, successively by low noise amplifier 123, radio-frequency filter 124, amplifier 125, low-converter (frequency mixer a kind of, the later signal frequency of mixing is lower than the original signal frequency) 126, intermediate frequency amplifier 127, Surface Acoustic Wave Filter 128, electrically controlled attenuator 129, amplifier 130 back output intermediate-freuqncy signals; Enter the intermediate-freuqncy signal of up-conversion passage successively by electrically controlled attenuator 119, intermediate frequency amplifier 118, intermediate-frequency filter 117, amplifier 116 by the intermediate frequency input port, upconverter (frequency mixer a kind of, the later signal frequency of mixing is higher than the original signal frequency) 115, radio frequency amplifier 114, radio-frequency filter 113, radio-frequency (RF) power amplification 112, to antenna, wherein radio-frequency (RF) switch 111 is subjected to sequencing control in the repeater through radio-frequency (RF) switch 111 output radiofrequency signals.
In Fig. 3, local oscillator generator 121 is made of integrated phase lock chip and discrete VCO (Voltage ControlOscillator voltage controlled oscillator), the local oscillation signal of output amplifies respectively after resistor network distributes, isolates, and delivers to two frequency conversion links in the passage.Wave detector 122 is realized detection by a part of signal of coupled antenna, by the transmitting power realization monitoring automatically of 120 pairs of antennas of automatic gain control.
In the internal structure of repeater shown in Figure 2, two RF-IF base station side radio-frequency modules 11 and whole end side radio-frequency module 12 constitute a complete frequency conversion and transmit passage.The intermediate frequency output of base station side radio-frequency module 11 connects the intermediate frequency input port of end side radio-frequency module 12, and the intermediate frequency delivery outlet of end side radio-frequency module 12 connects the intermediate frequency input port of base station side radio-frequency module 11.
Because in the TDS-CDMA system, the transmit-receive cofrequency of base station is received and dispatched conversion by the mode of TDD (time division multiplexing), change-over period is 10ms, be the 5ms emission, 5ms receives, and the switching sequence of radio-frequency channel needs the transmitting-receiving sequential of strict and base station synchronous fully.
If the base station is in emission state, the radio-frequency (RF) switch 111 of base station side radio-frequency module 11 will be beaten in accepting state in the repeater, the down going channel of base station side radio-frequency module 11 is opened, the data feedback channel Close All, 111 of the radio-frequency (RF) switch of end side radio-frequency module 12 will be beaten at emission state, the data feedback channel of end side radio-frequency module 12 is opened, and down going channel is closed.Signal is by the down going channel of base station side radio-frequency module 11, through low noise amplifier 123, filter 124, behind low-converter 126, become intermediate-freuqncy signal (13SM), through the access terminal intermediate frequency input port of side radio-frequency module 12 of Surface Acoustic Wave Filter 128, amplifier 130, intermediate frequency delivery outlet, after passing through amplifier, Surface Acoustic Wave Filter, frequency converter again, with signal transformation be and receive the signal of base station signal different frequent points, mail to terminal by retransmitting antenna through behind the power amplifier.Launch in terminal, in the time that the base station receives, the radio-frequency (RF) switch of end side radio-frequency module 12 is beaten in accepting state in the repeater, the down going channel of end side radio-frequency module 12 is opened, and data feedback channel is closed, and the radio-frequency (RF) switch of base station side radio-frequency module 11 is beaten at emission state, the data feedback channel of base station side radio-frequency module 11 is opened, down going channel is closed, and the signal of terminal emission is through end side radio-frequency module 12, and the power amplifier by base station side radio-frequency module 11 mails to the base station through donor antenna.
As can be seen from the above analysis, the switching sequence of up-downgoing passage requires relatively stricter, if asynchronous with the base station transceiver sequential, can't be worked in the repeater, and what donor antenna was launched simultaneously can influence the operate as normal of base station with the signal of base station asynchronous.Accurate sequencing control is provided by control module 18.
When the base station signal frequency that receives is different with the signal frequency that is forwarded to terminal, just the shift frequency amplification is adopted in the repeater.The frequency f1 correspondence of local oscillation signal in the base station side radio-frequency module 11 and reception base station, the corresponding another one frequency of local oscillator in the end side radio-frequency module 12 f2, in coverage hole, terminal can't receive base station signal f1, because the covering of repeater, terminal can be operated on the f2 frequency, and terminal sending and receiving signal frequency is f2, and the signal f2 of terminal emission sends out through repeater frequency conversion amplification the back f1 can the base station.
The reason that adopts shift frequency to amplify mainly is that TDS-CDMA system itself is to adopt transmit-receive cofrequency, tdd mode, and is different in essence with the fdd mode of GSM and CDMA.Because in GSM and the cdma system, the different frequencies of transmitting-receiving in the design of corresponding repeater, can adopt narrow band filter to realize the transmitting-receiving isolation, isolation is very high, is easy to realize the requirement of isolation and gain.And in TDS-CDMA system, highest-gain requires to reach 100Db, this just requires the isolation at least will be more than 120dB, if recurrence frequency is identical with the base station signal frequency, isolation is had relatively high expectations during then to antenna installation, big difficulty is also arranged simultaneously, so adopt the shift frequency mode on the circuit design, Surface Acoustic Wave Filter will produce bigger inhibition to the signal from retransmitting antenna feed-in donor antenna like this, increase isolation.
In Fig. 2 and Fig. 4, the internal structure of the control module 18 in the repeater of the present invention is described as follows, control module 18 is logic control centers of repeater, finishes the functions such as remote monitoring of synchronous extraction, command reception, frequency setting, gain-adjusted, switch control, repeater.This control module 18 mainly comprises mobile phone board 181, DSP182, FPGA183, D/A 184, A/D converter 185.
Because this system works is under the TDD mode, transmission circuit needs switching signal to control, and the transmitting-receiving of repeater must be identical with the transmitting-receiving sequential of base station.So can utilize mobile phone board 181 to carry out the extraction of synchronizing signal, synchronizing signal exports DSP to pulse mode, produces various switch controlling signals through FPGA sequential combinational logic again, the work of control radio circuit.
Gain Automatic control can be realized in the repeater simultaneously.After the amplification of end side radio-frequency module 12 downstream signals, transmit by retransmitting antenna, a part of signal that is coupled simultaneously is to the detecting circuit of control module 18, and through delivering among the DSP182 after the A/D185 conversion, DSP can calculate the transmitting power of retransmitting antenna again, compare with set point then, if different, the yield value of change down going channel detects again, less than 0.2dB, realize Gain Automatic adjustment up to error.The yield value of up channel equals the gain of downstream signal.
Because the shift frequency mode is adopted in the repeater, the local oscillation signal of two different frequencies must be arranged, so control module 18 will produce the frequency locking data of two kinds of frequencies, the value of frequency point that lock is issued by the base station or manually is provided with and obtains.Each running parameter should accomplish and can manually be provided with, and comprises with the PC setting and utilizes the toggle switch setting.
In Fig. 4 and Fig. 5, the program of repeater comprises mobile phone board program, BB plate (Base Band, the base band control board) (TI 5416 for DSP182, a kind of dsp chip of U.S. Texas Instruments company) program and FPGA (Field Programmable Gates Array, field programmable gate array) program, that FPGA183 adopts is the EPM3256ATC144-7 of the MAX300A series of altera corp.By serial communication, DSP182 transmits data by serial ports and FPGA183 between mobile phone board 181 and the DSP182 (TI5416).
The function that the program of mobile phone board 181 is achieved as follows:
(1) frequency sweep, obtain synchronously and keep.
(2) receive forwarding frequency, the performance number that webmaster is set.
(3) base station frequency value, forwarding frequency values, repeating power value are sent to DSP182, and export duplexing lock-out pulse.
(4) in the course of work, receive the warning information that DSP182 uploads, and mail to the base station.
The program of DSP182 is achieved as follows function and comprises:
(1) each running parameter of repeater is set, comprises the base station frequency value, transmit frequency values, repeating power value.The setting of these parameters is to send corresponding data by serial ports to FPGA183 to realize that FPGA183 is set to each parameter in the corresponding circuit again.
(2) receive the instruction and the parameter of mobile phone board 181 at any time, comprise status poll instruction and parameter setting instruction.The status poll instruction is the query statement that is issued by webmaster, and DSP182 receives the instruction back the current relevant work parameter in repeater is passed to mobile phone board 181, mails to webmaster by mobile phone board 181 again; Parameter setting instruction is also issued by webmaster, is used for revising the work at present parameter, and after DSP182 receives parameter, the parameter of calling among the DSP182 is provided with module, and relevant parameter is provided with by FPGA183.
(3) monitoring repeater operating state produces various warning information and uploads mobile phone board 181.
(4) realize the automatic monitoring function of power,, relatively send suitable repeating power value to FPGA183 in the back with desired value by real-time monitoring repeating power value.
In Fig. 5, the DSP182 treatment step in the control module 18 is as follows:
Step 510 is closed interruption and is carried out initialization;
Step 511 reads parameters such as frequency, power, gain;
Step 512 is provided with each parameter;
Step 513 is opened various interruptions;
Step 514 waits for that interruption is corresponding;
Step 515 judges that whether interrupt is that 10ms interrupts, and changes step 517 as "Yes";
Step 516 judges that whether interrupt is that mobile communication interrupts, and changes step 521 as "Yes", otherwise changes step 514 circulation;
Step 517 is carried out Gain Automatic adjustment;
Step 518, the inquiry of warning information and generation;
Step 519 mails to mobile phone with warning information, changes step 516 afterwards;
Step 520 is directly returned with nowhere to turn to the alert condition, changes step 516 afterwards;
Step 521 receives mobile phone information;
Step 522 receives the mobile phone state query messages;
Step 523 receives mobile phone parameters message is set;
Step 524 mails to mobile phone with state parameter, and goes back to step 514 continuation circulation;
Step 525 receives parameter, and each parameter is set, and goes back to step 514 afterwards and continues circulation.
In control module 18, FPGA183 is achieved as follows function:
Base produced switch controlling signal when (1) the duplexing synchronizing signal of exporting with mobile phone board 181 was, the various switching sequences of control respective radio-frequency inside modules, and the 10ms sync break signal of generation DSP182.
(2) receive the data that the DSP182 serial ports is sent, and judge it is which kind of data (comprise the base station frequency value, transmit frequency values, repeating power value), parameter is set on the relevant hardware circuit according to control signal.
In this part, include a DSP parameter module is set, be mainly used in parameter is set on the rf board.In Fig. 6, illustrated that this parameter is provided with the outside annexation of module, and Fig. 7 has illustrated the step of the used processing method of this parameter setting up procedure.
Step 710 is provided with pattern control word MODE[0..1] be 0;
Step 711 sends Bs_Fr (received signal frequency values) from serial ports 1;
Step 712 is provided with pattern control word MODE[0..1] be 1;
Step 713 sends Hs_Fr (forward signal frequency values) from serial ports 1;
Step 714 is provided with pattern control word MODE[0..1] be 1;
Step 715 sends gain data from serial ports 1.
In the control module 18 in Fig. 2, also include a power monitoring module, be mainly used in monitoring and adjust end side radio-frequency module 12 transmitting powers.In Fig. 8, disclosed the outside annexation of this power monitoring module, that is: end side radio-frequency module 12 power amplifier delivery outlets are coupled a part of signal to detecting circuit, export a level signal then to AD, enter DSP182 (TI5416) again, according to the height of level, by the judgement transmitting power of tabling look-up, the APC table exists among the EEPROM.If transmitting power is improper, need reset yield value adjustment.In Fig. 9, the flow process of the used processing method of this power monitoring process is as follows:
Step 910 reads the current power value;
Step 911 judges that normally whether performance number, then finishes as "Yes", otherwise enter step 912;
Step 913 is provided with yield value;
End step.
In embodiments of the invention, the workflow of this repeater is as follows:
Start-up routine: after powering on, control module 18 enters default setting, turn-offs in two radio- frequency modules 11,12 power supply of all amplifiers on the RF and IF passage, and the attenuator settings in the circuit is in the maximum attenuation amount, and making it not to external world, signal disturbs.Mobile phone board 181 enters frequency sweep, frequency locking, synchronizing process in the back bootstrapping that powers on.
After mobile phone board 181 enters synchronously, extract retransmission center frequency values, repeating power value from the base station down signal, duplexing synchronization pulse begins output.Control module 18 is put out base station signal frequency values, forward signal frequency values to the RF-IF radio-frequency module, and output is corresponding to the attenuator control voltage of repeating power value.Mains switch on the control module begins the duplexing lock-out pulse action with mobile phone board output, and the duplex channel on the RF-IF plate enters the operating state of time division duplex.
Working procedure:
In each transmitting-receiving cycle, control module 18 is measured the synchronous head power of the base station down signal after transmitting, and the repeating power value of setting with webmaster compares, if difference is arranged, then resets attenuator control voltage, makes error in 1dB.Webmaster can be changed the repeating power value at any time, and the repeater promptly can not influence service by automatic adjustment of said process.
If new forwarding frequency values is sent in the base station in the course of work, then the amplifier power supply of turn-offing in the RF-IF module earlier makes it to quit work, and resumes work after inserting new frequency values.
If step-out takes place in the course of work, then turn-off the amplifier power supply in the RF-IF module, and the attenuator settings in the circuit is in the maximum attenuation amount, same afterwards start-up course.
In the present embodiment, the reasonability of this repeater shell structure design has great significance to the realization of radio-frequency (RF) index.At first, radio-frequency module will have shielding box, could prevent that like this stop signal interferes with each other in the air; While two radio-frequency modules are separated by and will be tried one's best far; Radio frequency line will be lacked.
Externally there are three interfaces this repeater, 2 N type plugs and 1 220V attaching plug.The AC220V power supply is adopted in the repeater, after power supply is introduced the repeater, at first pass through lightning protection for power supply, be converted to DC12V to Switching Power Supply,, charge a battery simultaneously to the control module power supply, Switching Power Supply has power management function, after the AC220V outage, automatically switch to storage battery power supply, radio-frequency module obtains power supply and control signal from control module.
Donor antenna inserts the repeater by cable with signal, through lightning protection filter 13 back access base station side radio-frequency modules 11, the coupling part energy is given the mobile phone board 181 in the control module 18 in base station side radio-frequency module 11, base station side radio-frequency module 11 has one group of intermediate frequency output input port, links to each other with the intermediate frequency input/output port of end side radio-frequency module 12 respectively by cable.Signal after end side radio-frequency module 12 shift frequencies amplify, the detecting circuit of sub-fraction energy being coupled to the control module 18, all the other signals are linked retransmitting antenna through lightning protection filters 13.Two N type plugs also will be separated with certain distance mutually.
In Figure 10, disclosed the application mode that repeater of the present invention is used for the blind area covering of intensive block.Blind area for intensive block covers, owing to be simply to stop problem, the repeater can directly be installed, but because donor antenna and retransmitting antenna are all outdoor, it is very important that isolation each other just becomes, so will strengthen two distances between the antenna as much as possible, and utilize stopping of building body to increase and isolate.
In Figure 11, disclosed repeater of the present invention and be used for the application mode that the blind area in the tall and big tier building covers.For the blind area covering problem in the tall and big tier building, can utilize radio frequency amplifier, power splitter, coupler, circuit to prolong amplifier, antenna feeder, leaky cable etc. and carry out freedom combination distribution easily with reference to radio frequency direct amplifier system compartment system.
Because the working method of TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) is the TDD mode, uplink and downlink are with frequently, are operated in the upstream or downstream state by the timing control signal decision-making circuit.Therefore, existing repeater working frequency range all can not be applied in the TDS-CDMA system, and the present invention has exactly solved this problem, also brings following technique effect simultaneously:
(1) with lower cost increase coverage territory: the investment of repeater is well below the investment of base station.In vast rural area, small towns, the user is not a lot, and great amount of investment is built some waste of base station, as if not covering and can losing some users, builds the repeater ratio and builds base station small investment, instant effect.
(2) simple installation can enlarge the network coverage fast: on mounting condition (as to requirements such as machine room, electric power, iron towers), greatly simplify than the base station repeater, need not build machine room greatly upstairs and can install and use general.Because of communication blind zone with a varied topography, that housing-group stops and hypogee, tunnel etc. form, the repeater is first-selected solution at some.
(3) utilization rate of equipment and installations of raising base station: some base station (or sub-district) channel utilization is not high, can communication capacity more than needed be given to the place that needs by the repeater, when being benefited around, the utilization rate of equipment and installations of base station is improved.
(4) improve the covering quality of existing network: can improve this regional covering quality by the repeater to zone as some weak output signals.
In sum; though the present invention discloses as above with preferred embodiment; but above content is not in order to limit the present invention; those of ordinary skill in the art without departing from the spirit and scope of the present invention; can carry out various changes and retouching, so protection scope of the present invention should be with being as the criterion that claims define.
Claims (10)
1, a kind of repeater that is used for synchronous code division multiple access communication system, it is characterized in that: described repeater is applied to synchonism CDMA mobile communication system, further comprise: housing, power supply, antennal interface, base station side radio-frequency module, end side radio-frequency module, control module, described base station side radio-frequency module links to each other with described two respective antenna interfaces respectively with the end side radio-frequency module, and described base station side radio-frequency module and end side radio-frequency module are interconnected with one another by intermediate frequency input/outlet; Described control module is that benchmark produces various timing control signals in order to the synchronizing signal of extracting from the base station, controls frequency conversion, amplification and forwarding that described base station side radio-frequency module and end side radio-frequency module carry out the wireless signal between mobile communication base station and the terminal respectively.
2, repeater according to claim 1 is characterized in that: described control module further comprises: a mobile phone board, a digital signal processor, a field programmable gate array, a digital to analog converter and an analog to digital converter; Mobile phone board extracts a synchronous signal and exports this digital signal processor to pulse mode, use the sequential combinational logic to produce various switch controlling signals through this field programmable gate array again, control the work of described base station side radio-frequency module and end side radio-frequency module.
3, repeater according to claim 1 and 2 is characterized in that also comprising:
A storage battery is used to provide non-firm power;
A Switching Power Supply is used for switching the power supply source between power input interface and described storage battery.
4, repeater according to claim 3 is characterized in that also comprising:
A lightning protection for power supply is connected with described power input interface with described Switching Power Supply, is used for lightning protection.
5, according to claim 1,2 or 4 described repeaters, it is characterized in that also comprising:
Lightning protection filter, two ends are connected to described base station side radio-frequency module/end side radio-frequency module and described antennal interface, are used for lightning protection.
6, repeater as claimed in claim 1 or 2 is characterized in that described base station side radio-frequency module and end side radio-frequency module use local frequency work separately.
7, repeater as claimed in claim 1 or 2 is characterized in that being provided with an automatic gain control module between described base station side radio-frequency module of described base station side radio-frequency module and end side radio-frequency module and the end side radio-frequency module.
8, as claim 1,2 or 4 synchonism CDMA mobile communication repeater, it is characterized in that described base station side radio-frequency module, end side radio-frequency module, control module are outside equipped with shielding box.
9, the control method of the described repeater of a kind of claim 1 is applicable to the control method that control module is implemented in the repeater, it is characterized in that comprising the steps:
(1) utilize mobile phone board to extract the base station synchronization signal, and with this synchronisation source as the repeater;
(2) field programmable gate array produces various switch controlling signals according to synchronizing signal, the work of control radio circuit;
(3) mobile phone board in the repeater is realized the monitoring to directly putting, and the running parameter of repeater is obtained from webmaster by mobile phone board, by digital signal processor and field programmable gate array described parameter is set in the radio circuit.
10, control method as claimed in claim 9 is characterized in that the step that also exists mobile phone board that the operating state and the warning information of repeater are uploaded webmaster.
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| CNB021602794A CN1306723C (en) | 2002-12-31 | 2002-12-31 | Direct transmitting station for synchronous CDMA system and its control |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021602794A CN1306723C (en) | 2002-12-31 | 2002-12-31 | Direct transmitting station for synchronous CDMA system and its control |
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| CN1457160A true CN1457160A (en) | 2003-11-19 |
| CN1306723C CN1306723C (en) | 2007-03-21 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US6469984B1 (en) * | 1999-06-24 | 2002-10-22 | Qualcomm Incorporated | Method and system for monitoring traffic on a code division multiple access repeater |
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-
2002
- 2002-12-31 CN CNB021602794A patent/CN1306723C/en not_active Expired - Fee Related
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