CN203590465U - Indoor and outdoor distribution system of wireless communication signal - Google Patents
Indoor and outdoor distribution system of wireless communication signal Download PDFInfo
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- CN203590465U CN203590465U CN201320523718.XU CN201320523718U CN203590465U CN 203590465 U CN203590465 U CN 203590465U CN 201320523718 U CN201320523718 U CN 201320523718U CN 203590465 U CN203590465 U CN 203590465U
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Abstract
The utility model discloses an indoor and outdoor distribution system of wireless communication signals; the system comprises a mina unit, an expansion unit and a far-end unit; the main unit is in communication connection with the expansion unit through a fiber; the expansion unit is in communication connection with the far-end unit through a CAT-5 line. The beneficial effects are that signal coverage of multi-businesses for dense low building groups can be realized, thereby solving signal blind compensation problems in dense low building groups in villages in the city; the system can reduce cost, construction level and property coordination difficulty; gain of the whole system is unchanged when different CAT-5 line lengths are employed through gain adjustment.
Description
Technical field
The utility model relates to wireless communication technology field, more particularly, relates to a kind of indoor and outdoor compartment system of wireless communication signals.
Background technology
On the one hand, along with development and the individual of personal mobile communication technology are increasing to the dependence of mobile service, only continuing to optimize the network coverage could provide to client the covering signal of high-quality, improves user's satisfaction rate.On the other hand, along with the fast development in present city, high density building construction group is the appearance of villages within the city particularly, covers to the existing network optimization and has brought a difficult problem.Therefore, in order to solve this difficult problem, need to be to the signal blind compensating in indoor and outdoor intensive building place.Method to signal blind compensating in prior art has:
(1) by master unit and far-end unit, form signal blind compensating system, wherein, master unit from the coupled signal of base station by Optical Fiber Transmission to far-end unit; Far-end unit addressing is at roof, so that building are around carried out to signal covering.
The shortcoming of this method is: can not thoroughly solve signal blind compensating problem, for 7 layers of above intensive building, can only there is above obvious signal to cover to 4 layers, and the signal of 1 to 3 layer is still very weak, particularly the covering effect of signals on ground is the poorest, the interrupted phenomenon of conversing is more serious, can not carry out effective signal covering to target area.
(2) by master unit, relay extension unit and far-end unit, form signal blind compensating system.Wherein, master unit will be transferred to relay extension unit from the signal of base station coupling by optical fiber, and relay extension unit transfers signals to far-end unit by optical fiber again.Far-end unit is laid between building construction, to realize, the signal between intensive building construction is covered.
The shortcoming of this method is: at the intensive building of villages within the city, carry out the wiring of optical fiber, cost is high, and difficulty of construction is large, and the duration cannot ensure; Due to one worry and the opposing mood of people to base station signal radiation, can cause a series of situations that cause difficulty of construction to strengthen such as property consults causedly to delay work, the duration delays; Construction cost is high.
Utility model content
The technical problems to be solved in the utility model is, during for the above-mentioned signal blind compensating to indoor and outdoor intensive building place of prior art, coverage effect is poor, can not carry out effective signal covering to target area, the defects such as construction cost is high, difficulty of construction is large, provide the indoor and outdoor compartment system of wireless communication signals.
The utility model solves the technical scheme that its technical problem adopts: a kind of indoor and outdoor compartment system of wireless communication signals, comprising: master unit, expanding element and far-end unit, and described master unit is by optical fiber and the communication connection of described expanding element; Described expanding element is by category-5 cable and the communication connection of described far-end unit;
Described master unit for by from base station or the downstream signal that is coupled to of base station zoom out system by Optical Fiber Transmission to described expanding element, and for receiving the upward signal that described expanding element uploads and sending to base station or base station zoom out system;
Described expanding element is for carrying out the downstream signal of described master unit transmission after frequency conversion, amplification and filtering processing, by category-5 cable, be transferred to described far-end unit, and carry out, after frequency conversion, amplification and filtering processing, by Optical Fiber Transmission, arriving described master unit for the upward signal that described far-end unit is transmitted by category-5 cable;
Described far-end unit is for determining the length of the category-5 cable connecing between expanding element and far-end unit by power detection, and the downstream signal described expanding element being transmitted by category-5 cable according to described length carries out after frequency conversion, gain compensation and amplification are processed target area to carry out signal covering, and for the upward signal by antenna-coupled being carried out after frequency conversion, gain compensation and amplification are processed being transferred to described expanding element by category-5 cable according to described length.
Preferably, described expanding element comprises RJ45 shunt module, the first upward signal processing module, the first downstream signal processing module, the first power splitter, the second power splitter, the first optical module and the second optical module;
Wherein, described RJ45 shunt module is connected with described the first upward signal processing module and the first downstream signal processing module respectively; Described the first power splitter is connected with described the first downstream signal processing module and the first optical module respectively; Described the second power splitter is connected with described the first upward signal processing module and the first optical module respectively; Described the second optical module is connected with described the first power splitter and the second power splitter respectively;
For described RJ45 shunt module is closed, signal behind road amplifies described the first upward signal processing module, be transferred to described the second power splitter after filtering and frequency-conversion processing;
Described the second power splitter is transferred to described the first optical module after the signal of described the first upward signal processing module signal after treatment and the transmission of the second optical module is closed to road;
Described the first optical module is for the signal of described the second power splitter transmission is modulated on light signal and by Optical Fiber Transmission and arrives described master unit, and for by described master unit, by the modulated light signal of Optical Fiber Transmission, to carry out opto-electronic conversion be radiofrequency signal and be transferred to described the first power splitter;
Described the first power splitter is for the radiofrequency signal of described the first optical module transmission is divided into two-way, and wherein a road is transferred to described the second optical module, and another road is transferred to described the first downstream signal processing module;
Described the first downstream signal processing module is transferred to described RJ45 shunt module for the signal of the first power splitter transmission is carried out after filtering, frequency conversion and amplification are processed;
Described RJ45 shunt module carries out by category-5 cable, being transferred to described far-end unit after shunt for the signal that described the first downstream signal processing module is transmitted, and is transferred to described the first upward signal processing module after closing road for the upward signal that described far-end unit is transmitted by category-5 cable;
Described the second optical module is for being modulated to light signal by the signal of described the first power splitter transmission, be transferred to the next stage expanding element of connecting with described expanding element, and be transferred to described the second power splitter after being converted to radiofrequency signal for the uplink optical signal that the next stage expanding element of described series connection is transmitted.
Preferably, described the first upward signal processing module comprises the first gain-adjusted and filtering and amplifying circuit, the first filtering and amplifying circuit and the first frequency changer circuit that connect successively;
Described the first downstream signal processing module comprises the second gain-adjusted and filtering and amplifying circuit, the second frequency changer circuit and the filter circuit that connect successively;
Wherein, described the first frequency changer circuit and the second frequency changer circuit include frequency mixer, for by the signal receiving and local oscillation signal mixing so that signal is carried out to frequency-conversion processing.
Preferably, described expanding element also comprises: the monitoring module being connected with described the first optical module, the first power splitter, the second power splitter, the first upward signal processing module and the first downstream signal processing module respectively;
Described monitoring module is for monitoring and arrange the parameters of whole expanding element.
Preferably, a described master unit connects eight described expanding elements; A described expanding element connects eight described far-end units.
Preferably, between eight described expanding elements, by optical fiber pigtail, connect, or drag eight optical module parallel connections by one of master unit, or first by one of master unit 1, drag eight optical module parallel connections, then connect by optical fiber pigtail.
Preferably, described RJ45 shunt module comprises: the one or two power splitter, the two or two power splitter, the three or two power splitter, the four or two power splitter, the five or two power splitter, the six or two power splitter, the first balun, the second balun, the 3rd balun, the 4th balun, the 5th balun, the 6th balun, the 7th balun, the 8th balun, a RJ45 network interface, the 2nd RJ45 network interface, the 3rd RJ45 network interface and the 4th RJ45 network interface;
Wherein, described the one or two power splitter connects respectively the two or two power splitter and the three or two power splitter; The two or two power splitter is connected with the first balun and the second balun respectively; The three or two power splitter is connected with the 3rd balun and the 4th balun respectively;
Described the four or two power splitter connects respectively the five or two power splitter and the six or two power splitter; The five or two power splitter is connected with the 5th balun and the 6th balun respectively; The six or two power splitter is connected with the 7th balun and the 8th balun respectively;
Described the first balun is connected with a RJ45 network interface with the 5th balun; The second balun is connected with the 2nd RJ45 network interface with the 6th balun; The 3rd balun is connected with the 3rd RJ45 network interface with the 7th balun; The 4th balun is connected with the 4th RJ45 network interface with the 8th balun;
Described the one or two power splitter is connected with described the first downstream signal processing module; Described the four or two power splitter is connected with described the first upward signal processing module.
Preferably, described far-end unit comprises signal separation module, duplexer, the second upward signal processing module, the second downstream signal processing module, signal detection module and MCU;
Described signal separation module is connected with described the second upward signal processing module and the second downstream signal processing module respectively; Described the second upward signal processing module is connected with described duplexer respectively with the second downstream signal processing module; Described MCU is connected with described signal detection module; Described signal detection module is connected with described signal separation module;
Described signal separation module separates and is transferred to described the second downstream signal processing module for the downstream signal that described expanding element is transmitted, and by category-5 cable, is transferred to described expanding element after closing road and differential transformation processing for the upward signal that the second upward signal processing module transmission is come;
Described the second downstream signal processing module is for carrying out isolated described signal separation module downstream signal to be transferred to described duplexer after filtering, amplification and frequency-conversion processing;
Described duplexer is fed on antenna and launches for the signal that described the second downstream signal processing module transmission is come, and for by antenna from the uplink signal transmissions of aerial coupling to the second upward signal processing module;
Described the second upward signal processing module is transferred to described signal separation module for the upward signal of duplexer transmission is amplified, after filtering and frequency-conversion processing;
Described signal detection module is for carrying out detection to the input of 24MHz synchronised clock;
Described MCU judges the line length of the category-5 cable between described expanding element and far-end unit for the detecting circuit obtaining by described detection, and for regulate the gain of described the second upward signal processing module and described the second downstream signal processing module according to described line length, to realize descending and automatic gain control up link.
Preferably, described the second downstream signal processing module comprises the 3rd gain-adjusted and filtering and amplifying circuit, the 3rd frequency changer circuit and the second filtering and amplifying circuit that connect successively;
Described the second upward signal processing module comprises the 3rd filtering and amplifying circuit, the 4th frequency changer circuit and amplification and the gain adjustment circuit that connect successively;
Described the 3rd frequency changer circuit and the 4th frequency changer circuit include frequency mixer, for by the signal receiving and local oscillation signal mixing so that signal is carried out to frequency-conversion processing;
Described the 3rd gain-adjusted and filtering and amplifying circuit and amplification and gain adjustment circuit are according to the adjusting of the described MCU adjustment that gains.
Preferably, described signal detection module comprises power detector.
The indoor and outdoor compartment system of implementing wireless communication signals of the present utility model, has following beneficial effect: can realize intensive low rise buildings group is carried out to multiple services signal covering, effectively solve the signal blind compensating difficult problem between the intensive buildings such as villages within the city; Can reduce costs, reduce difficulty of construction and property and coordinate difficulty; By frequency conversion transmission process, can lower loss; By gain, adjust and realize when different category-5 cables are long, guarantee that the gain of whole system is constant.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structure chart of the indoor and outdoor compartment system of the wireless communication signals of the utility model embodiment;
Fig. 2 is the networking structure figure of master unit, expanding element and the far-end unit of the utility model embodiment;
Fig. 3 is the structure chart of the master unit of the indoor and outdoor compartment system of the wireless communication signals shown in Fig. 1;
Fig. 4 is the structure chart of the expanding element of the indoor and outdoor compartment system of the wireless communication signals shown in Fig. 1;
Fig. 5 is the structure chart of supply module in the expanding element shown in Fig. 4;
Fig. 6 is the structure chart of RJ45 shunt module in the expanding element shown in Fig. 4;
Fig. 7 is the structure chart of the far-end unit of the indoor and outdoor compartment system of the wireless communication signals shown in Fig. 1;
Fig. 8 is that the far-end unit shown in Fig. 7 is realized the principle assumption diagram that uplink downlink automatic gain is adjusted;
Fig. 9 is the principle assumption diagram of signal separation module in the far-end unit shown in Fig. 7;
Figure 10 is the confession electrical schematic of the far-end unit shown in Fig. 7.
Embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
It referring to Fig. 1, is the structure chart of the indoor and outdoor compartment system of the wireless communication signals of the utility model embodiment.The indoor and outdoor compartment system of the wireless communication signals of the utility model embodiment is applicable to intensive low rise buildings group to carry out multiple services wireless signal covering.The indoor and outdoor compartment system of the wireless communication signals of the utility model embodiment comprises master unit 1, expanding element 2 and far-end unit 3.
Referring to Fig. 2, the networking structure figure of the master unit of the utility model embodiment, expanding element and far-end unit.Master unit 1 can access information source by optical fiber, coaxial cable, the mode such as wireless, is connected by optical fiber with expanding element 2 simultaneously.Expanding element 2 connects far-end unit 3 by category-5 cable.A master unit 1 at least can be with 2, one expanding elements 2 of 8 expanding elements can be with 8 far-end units 3.Networking mode between master unit, expanding element and far-end unit, can select according to the size of the existing resource of equipment mounting points and overlay area.Connected mode between master unit and expanding element comprises: (1) networking of connecting: connect by optical fiber pigtail between expanding element 2 and expanding element 2; (2) networking in parallel: drag eight optical modules in parallel at master unit by between expanding element 2 and expanding element 2, now, master unit has eight interfaces to be connected with expanding element 1 respectively; (3) two-layer configuration networking: first drag eight optical modules in parallel at master unit 1 by between expanding element 2 and expanding element 2, then connect by optical fiber pigtail at expanding element 2 places.
On expanding element 2, the transparent transmission signal of WIFI online can be closed to road to far-end unit 3 simultaneously, by sharing a category-5 cable, transmit base station signal and WIFI signal simultaneously, far-end unit 3 realize the separation of base station signal and WIFI transparent transmission signal, by external AP, realize the wireless Internet access of target area covered.
Master unit 1 for by from base station or the downstream signal that is coupled to of base station zoom out system by Optical Fiber Transmission to expanding element 2, and for receiving the upward signal that expanding element 2 uploads and sending to base station or base station zoom out system.
Expanding element 2 carries out after frequency conversion, amplification and filtering processing for the downstream signal that master unit 1 is transmitted, by category-5 cable, be transferred to far-end unit 3, and carry out, after frequency conversion, amplification and filtering processing, by Optical Fiber Transmission, arriving master unit 1 for the upward signal that far-end unit 3 is transmitted by category-5 cable.
Far-end unit 3 is for determining the length of the category-5 cable connecing between expanding element 2 and far-end unit 3 by power detection, and downstream signal expanding element 2 being transmitted by category-5 cable according to described length carries out after frequency conversion, gain compensation and amplification are processed target area to carry out signal covering, and for the upward signal by antenna-coupled being carried out after frequency conversion, gain compensation and amplification are processed being transferred to expanding element 2 by category-5 cable according to described length.
It referring to Fig. 3, is the structure chart of the master unit of the utility model embodiment.The master unit 1 of the utility model embodiment comprises duplexer 105, upward signal processing module 107, downstream signal processing module 106, monitoring module 103, modulator-demodulator (MODEM) 104, power module 102, photoelectric conversion module 101.Wherein, monitoring module 103 is electrically connected with upward signal processing module 107, downstream signal processing module 106, modulator-demodulator (MODEM) 104, power module 102 and photoelectric conversion module 101 respectively.
Downstream signal processing module 106 comprises successively the attenuator (ATT), level control circuit (ALC), first order amplifier, Surface Acoustic Wave Filter (SAW) and the second level amplifier that connect, also comprise the descending input detection module that is connected with duplexer 105 and monitoring module 103 respectively and with the lower line output detection module being connected with second level amplifier and monitoring module 103 respectively.Second level amplifier is connected with photoelectric conversion module 101 and power module 102 respectively.Attenuator is connected with monitoring module.
Upward signal processing module 105 comprises the first order amplifier, level control circuit (ALC), attenuator (ATT), Surface Acoustic Wave Filter (SAW) and the second level amplifier that connect successively, also comprises the upper line output detection module being connected with duplexer 105 and monitoring module 103 respectively.First order amplifier is connected with photoelectric conversion module 101 and power module 102 respectively.Attenuator is connected with monitoring module.
In the course of the work, when master unit 1 carries out down link signal processing, the downlink radio-frequency signal that master unit 1 is coupled by coupler from information sources such as base station or base station zoom out system (as RRU) after detection, ATT numeral decay control, the control of ALC level and the amplification filtering of descending input detection module, enters into photoelectric conversion module 101 successively; Photoelectric conversion module 101 is modulated to radiofrequency signal on the light signal that the laser of photoelectric conversion module 101 produces, and by Optical Fiber Transmission, arrives expanding element 2.
When master unit 1 carries out uplink signal processing, the laser signal that the PD photodetector of photoelectric conversion module 101 is launched by demodulation expanding element 2 obtains up radiofrequency signal, and this radiofrequency signal is successively by being coupled to the information source places such as base station or RRU after the processing such as amplification filtering, ALC control, ATT decay control, up power output detection.
In embodiment of the present utility model, monitoring module 103 is monitored for the data processing to whole master unit 1 and function.Monitoring module 103 is monitored the inquiry of the descending input power of current master unit 1, up power output, module alarm, module monitors, each functions of modules and is arranged etc., simultaneously also for communicating by letter of subordinate unit (expanding element 2 and all far-end units 3) monitored.
In embodiment of the present utility model, adjust demodulation module (MODEM) 104 and be responsible for backstage by message search or state and the function of current device are set.Power module 102 is responsible for the power supply of all modules of master unit to supply with.Photoelectric conversion module 101 adopts one to drag eight laser modules, the MCU part of photoelectric conversion module 101 can adopt the STM32F101 of ST company, communication part can adopt the CC1000 radio transmitting and receiving chip of TI to carry out FSK transparent transmission, communication frequency is set to 433.79MHz, for the transparent transmission of inquire about/parameters of monitoring module 13 order.Photoelectric conversion module 101 adopts one to drag eight assemblies, can eight expanding element of traction, and still have-6dBm of luminous power, and be reserved with the light AGC compensation of 5dB, can compensate the light loss that on Practical Project, fiber optic stretch and jumping fiber cause, receives can reach-18dBm of luminous sensitivity.
It referring to Fig. 4, is the structure chart of the expanding element of the utility model embodiment.Expanding element comprises: the first optical module 201, the second optical module 202, the first power splitter 203, the second power splitter 204, monitoring module 205, PLL_VCO206, LPF filter 207, RJ45 shunt module 208, supply module 209, the first downstream signal processing module 211 and the first upward signal processing module 212.Wherein, monitoring module 205 is connected with the first optical module 201, the second optical module 202, the first upward signal processing module 212, the first downstream signal processing module 211 and PLL_VCO206 respectively.LPF filter 207 is connected with PLL_VCO206 and the first upward signal processing module 212 respectively.The first downstream signal processing module 211 is connected with the first power splitter 203, the first optical module 201, RJ45 shunt module 208 respectively.The first upward signal processing module 212 is connected with RJ45 shunt module 208, the second power splitter 204 respectively.The first power splitter 203 is connected with the first optical module 201, the second optical module 202 respectively.The second power splitter 204 is connected with the second optical module.
Referring to Fig. 4, the first downstream signal processing module 211 comprises the filter circuit 2110, the second frequency changer circuit 2111 and the second gain-adjusted and the filtering and amplifying circuit 2112 that connect successively.Wherein, filter circuit 2110 comprises the ALC and the SAW that are connected; The second frequency changer circuit 2111 comprises frequency mixer; The second gain-adjusted and filtering and amplifying circuit 2112 comprise LPF, the ATT, first order amplifier, second level amplifier and the LPF that connect successively.The first upward signal processing module 212 comprises the first filtering and amplifying circuit 2122, the first frequency changer circuit 2121 and the first gain-adjusted and the filtering and amplifying circuit 2120 that connect successively.The first frequency changer circuit 2121 comprises frequency mixer.The first filtering and amplifying circuit 2122 comprises duplexer, first order amplifier, 115M intermediate frequency Surface Acoustic Wave Filter, second level amplifier and ALC.The first gain-adjusted and filtering and amplifying circuit 2120 comprise SAW, ATT and third level amplifier.
In the course of the work, the modulated light signal being transmitted by the photoelectric conversion module 101 of master unit 1 is converted to radiofrequency signal in the first optical module 201 after opto-electronic conversion, and through the first power splitter 203, radiofrequency signal is divided into two-way; Wherein Yi road signal is input to the second optical module 202, so that radiofrequency signal is modulated on light signal, is transferred to and the next expanding element of expanding element cascade, the cascade network between in this way can expanding element; Another road signal, after ALC control circuit, the filtering of SAW surface acoustic wave of the first downstream signal processing module 211 are processed, enters into frequency mixer successively; The local oscillation signal mixing of this signal and 944.5MHz in frequency mixer, exports an intermediate-freuqncy signal; This intermediate-freuqncy signal, through LPF low-pass filter unit, is passed through local oscillator and the radiofrequency signal of mixer leakage with effective filtering; After filtering, this intermediate-freuqncy signal, through ATT numerical-control attenuator, regulates the gain of link; This intermediate-freuqncy signal is amplified through first order amplifier (BG18C) out from ATT, and enter into second level amplifier (BG09AG) and carry out drive amplification output, then by coupling circuit coupled signal, carry out detection to lower line output detection (AD8314); In addition, this intermediate-freuqncy signal after second level amplifier (BG09AG) amplifies output through a LPF(low pass filter) be input to RJ45 shunt module 208 after filtering; RJ45 shunt module 208 is carried out the shunt processing of a point eight to signal, then through a Ba Lun, signal is carried out by network interface, exporting after difference processing.
For upward signal, far-end unit 3 is transferred to RJ45 shunt module 208 by common category-5 cable by intermediate-freuqncy signal.The differential transformation that RJ45 shunt module 208 is carried out signal is processed and is closed after the processing of road, is entered into the first upward signal processing module 212.This signal is through the high pass part of a duplicate circuitry of being built by discrete device of the first upward signal processing module 212, be input to after first order amplifier (BG18C) amplification, intermediate frequency Surface Acoustic Wave Filter through 115M is carried out filtering to signal, after the amplification of second level amplifier (BG18D), be input to again afterwards ALC level control circuit, the local oscillation signal that enters into afterwards frequency mixer and 944.5M carries out mixing, the signal of output MHz more than 800; This signal, through the filtering of SAW Surface Acoustic Wave Filter, carries out filtering with the local oscillation signal of the intermediate frequency to 115M and 944.5M; Through filtered signal, after ATT numerical-control attenuator, enter into third level amplifier (BG18D) and amplify output, and control up power output by upper line output detection (AD8314) detection feedback ALC; On the other hand, through the signal of third level amplifier (BG18D) output, pass through the second power splitter (PD0900U03) 204, after closing road with the up output signal of the second optical module 202, be input to the first optical module 201; After being modulated to light signal, signal behind the first optical module 201Jiang He road returns master unit 1 by Optical Fiber Transmission.
The up output signal of the second optical module 202 is the upward signal that the next stage expanding element 2 of series connection transmits.By using the first optical module 201 and the second optical module 202, can realize the cascade network of 2 of expanding elements.Wherein the emission wavelength of the first optical module 201 is that 1310nm receives light, and receiving optical wavelength is 1550nm.The emission wavelength of the second optical module 202 is 1550nm, and receiving light wavelength is 1310nm.
In embodiment of the present utility model, the frequency of the local oscillation signal of PLL_VCO206 is arranged by monitoring module 205.Communication between expanding element 2 and 3 of far-end unit is to communicate by SI4432 transceiving chip.Its signal of communication is exported after the duplicate circuitry of descending intermediate frequency output and descending intermediate-freuqncy signal are closed road.
In embodiment of the present utility model, it is LPC2368FBD100 or MAX3232 communication chip that monitoring module 205 can adopt model.Monitoring module 205, for the parameters of whole expanding element 2 is monitored and arranged, specifically comprises: the functions such as the frequently comprehensive setting of the VCO of PLL_VCO26, the control inquiry of up-downgoing ATT, the processing of SI4432 communication data, the communication inquiry of optical module; Respond the inquiry that master unit 1 sends simultaneously and order etc. is set.
Supply module 209 is for the power supply of all modules to expanding element 2.It referring to Fig. 5, is the structure chart of the supply module in the expanding element of the utility model embodiment.Supply module 209 comprises Switching Power Supply, respectively the PSE supply module that is connected with Switching Power Supply and DC/DC module, the first low pressure linear voltage regulator and the second low pressure linear voltage regulator that are connected with DC/DC module respectively.Wherein can to select model be the pressurizer of AMS1117-3.3 to the first low pressure linear voltage regulator, and it is the pressurizer of NJU7775F03 that the second low pressure linear voltage regulator can be selected model.Export after Switching Power Supply is processed+48V direct current of the voltage of 220V outputs to PSE supply module; PSE supply module, to the power supply of RJ45 shunt module, to be responsible for carrying out POE power supply to far-end unit 3 by common category-5 cable, to have short-circuit protection and disconnects turn-off function.After Switching Power Supply is processed output+12V direct current by DC/DC module converts is+5V direct current.Wherein+5V direct current is for the amplifier power supply to expanding element 2.+ 5V direct current is through the first be converted to+3.3V of low pressure linear voltage regulator direct current, and this direct current is for powering to monitoring module.+ 5V direct current is through the second be converted to+3V of low pressure linear voltage regulator direct current, and this direct current is for powering to PLL_VCO.
It referring to Fig. 6, is the structure chart of the RJ45 shunt module of the utility model embodiment.RJ45 shunt module 208 comprises: the one or two power splitter 501, the two or two power splitter 502, the three or two power splitter 503, the four or two power splitter 504, the five or two power splitter 505, the six or two power splitter 506, the first balun 601, the second balun 602, the 3rd balun 603, the 4th balun 604, the 5th balun 605, the 6th balun 606, the 7th balun 607, the 8th balun 608, the one RJ45 network interface 701, the 2nd RJ45 network interface 702, the 3rd RJ45 network interface 703 and the 4th RJ45 network interface 704.
Wherein, the one or two power splitter 501 connects respectively the two or two power splitter the 502 and the 32 power splitter 503; The two or two power splitter 502 is connected with the first balun 601 and the second balun 602 respectively; The three or two power splitter 503 is connected 604 with the 3rd balun 603 and the 4th balun respectively; The four or two power splitter 504 connects respectively the five or two power splitter the 505 and the 62 power splitter 506; The five or two power splitter 505 is connected with the 5th balun 605 and the 6th balun 606 respectively; The six or two power splitter 506 is connected with the 7th balun 607 and the 8th balun 608 respectively; The first balun 601 is connected 701 with the 5th balun 605 with a RJ45 network interface; The second balun 602 is connected with the 2nd RJ45 network interface 702 with the 6th balun 606; The 3rd balun 603 is connected with the 3rd RJ45 network interface 703 with the 7th balun 607; The 4th balun is connected with the 4th RJ45 network interface 704 with 604 the 8th baluns 608; The one or two power splitter 501 is connected with the first downstream signal processing module 211; The four or two power splitter 504 is connected with the first upward signal processing module 212.
In embodiment of the present utility model, the one or two power splitter the 501, the 22 power splitter the 502 and the 32 power splitter 503 is all for carrying out shunt to signal.The four or two power splitter the 504, the 52 power splitter the 505 and the 62 power splitter 506 is all for closing road to signal.The first balun 601, the second balun 602, the 3rd balun 603, the 4th balun 604, the 5th balun 605, the 6th balun 606, the 7th balun 607 and the 8th balun 608 are all for carrying out difference processing.The one RJ45 network interface 701 and the 2nd RJ45 network interface 702 will be for being transferred to far-end unit 3 through power splitter and balun signal after treatment.The 3rd RJ45 network interface 703 and the 4th RJ45 network interface 704 receive for transmitting the signal that far-end unit 3 transmission come.
In embodiment of the present utility model, RJ45 shunt module 208 is except the shunt for completing descending intermediate-freuqncy signal and up intermediate-freuqncy signal He road, also for completing feed-in that PSE supply module powers to far-end unit 3 and feed-in of WIFI transparent transmission signal etc.By RJ45 shunt module 208, can realize up-downgoing intermediate-freuqncy signal, WIFI transparent transmission signal and PSE power supply all gathers on a network interface, wherein 1 of RJ45 network interface, 2,3 and 6 lines are for the transmission of WIFI transparent transmission signal, and 4,5,7 and 8 lines are for transmission and the PSE power supply of intermediate-freuqncy signal.
It referring to Fig. 7, is the structure chart of the far-end unit of the utility model embodiment.The far-end unit of the utility model embodiment comprises MCU303, duplexer 306, signal separation module 305, the second upward signal processing module 301, the second downstream signal processing module 302 and signal detection module 304, also comprises: SI4432 communication module (not label), POE are subject to electric module (not label), DC/DC module and not label of PLL_VCO().
Signal separation module 305 is connected with the second upward signal processing module 301 and the second downstream signal processing module 302 respectively; The second upward signal processing module 301 is connected with duplexer 306 respectively with the second downstream signal processing module 302; MCU303 is connected with signal detection module 304; Signal detection module 304 is connected with signal separation module 305.SI4432 communication module is connected with MCU303 and signal separation module 305 respectively; POE is connected with DC/DC module and signal separation module 305 respectively by electric module; DC/DC module is connected with MCU303 and PLL_VCO, is used to MCU303 and PLL_VCO that electric energy is provided.PLL_VCO is for generation of 944.5MHz local oscillation signal.
Signal separation module 305 separates and is transferred to the second downstream signal processing module 302 for the downstream signal that expanding element 2 is transmitted, and by category-5 cable, is transferred to expanding element 2 after closing road and differential transformation processing for the upward signal that the second upward signal processing module 301 transmission are come.
The second downstream signal processing module 302 is for carrying out isolated signal separation module 305 downstream signal to be transferred to duplexer 306 after filtering, amplification and frequency-conversion processing.
Duplexer 306 is fed on antenna and launches for the second downstream signal processing module 302 being transmitted to the signal coming, and for by antenna from the uplink signal transmissions of aerial coupling to the second upward signal processing module 301.
The second upward signal processing module 301 is amplified, is transferred to signal separation module 305 after filtering and frequency-conversion processing for the upward signal that duplexer 306 is transmitted.
Signal detection module 304 is for carrying out detection to the input of 24MHz synchronised clock.Signal detection module 304 comprises power detector.
MCU303 judges the line length of the category-5 cable between expanding element 2 and far-end unit 3 for the detecting circuit obtaining by detection, and for regulate the gain of the second upward signal processing module 301 and the second downstream signal processing module 302 according to described line length, to realize descending and automatic gain control up link.Referring to Fig. 8, be in embodiment of the present utility model, to realize the principle assumption diagram that uplink downlink automatic gain is adjusted.RJ45 network interface transfers to signal separation module 305 by the signal transmitting by category-5 cable, and after the processing of signal separation module 305, power detector is by the input of 24MHz synchronised clock is carried out to detection, and detecting circuit is transferred to MCU303; MCU303 judges that according to detecting circuit line length is to determine the length of the category-5 cable being connect between expanding element 2 and far-end unit 3, and according to the length of category-5 cable, by regulating ATT(attenuator) automatic gain (AGC) of realizing up-downgoing adjusts.Should be understood that the balance in order to guarantee uplink downlink, when automatic gain (AGC) is controlled, uplink downlink carries out simultaneously.Wherein, ATT comprises the ATT being arranged in upward signal processing module 301 and is arranged at the ATT in downstream signal processing module 302.
Referring to Fig. 7, the second downstream signal processing module 302 comprises the 3rd gain-adjusted and filtering and amplifying circuit 3022, the 3rd frequency changer circuit 3021 and the second filtering and amplifying circuit 3020 that connect successively.Wherein, the 3rd gain-adjusted and filtering and amplifying circuit 3022 comprise the LPF, first order amplifier (BG18C), ATT, amplifier (BG18C), ALC, 70M intermediate frequency Surface Acoustic Wave Filter and the amplifier (BG18D) that connect successively.The 3rd frequency changer circuit 3021 comprises frequency mixer, for by the signal receiving and local oscillation signal mixing so that signal is carried out to frequency-conversion processing.The second filtering and amplifying circuit 3020 comprises the SAW, amplifier (BG18D), SAW, radio frequency amplifier (TQP7M9103), SAW and the linear amplifier (AH420) that connect successively.
The second upward signal processing module 301 comprises the 3rd filtering and amplifying circuit 3010, the 4th frequency changer circuit 3011 and amplification and the gain adjustment circuit 3012 that connect successively.Wherein, the 3rd filtering and amplifying circuit 3010 comprises the low noise amplifier (ATF55143), SAW, low noise amplifier (SGA6586), ALC, amplifier (BG18C) and the SAW that connect successively.The 4th frequency changer circuit 3011 comprises frequency mixer, for by the signal receiving and local oscillation signal mixing so that signal is carried out to frequency-conversion processing.Amplification and gain adjustment circuit 3012 comprise driving amplifier (BG09AG) and ATT.
ATT in ATT in the 3rd gain-adjusted and filtering and amplifying circuit 3022 and amplification and gain adjustment circuit 3012 is according to the adjusting of the MCU303 adjustment that gains.
In the course of the work, the signals such as the descending intermediate-freuqncy signal being transmitted by category-5 cable by expanding element 2 and 24M synchronised clock, SI4432 communication signal, WIFI transparent data, after the circuit of signal separation module 305, realize the separation of various signals and the output of POE power supply; Isolated descending intermediate-freuqncy signal is through LPF(low pass filter) and first order amplifier (BG18C) be amplified into ATT numerical-control attenuator; After first order amplifier amplifies, be input to 70MHz intermediate frequency Surface Acoustic Wave Filter afterwards, descending intermediate-freuqncy signal carried out to frequency-selecting processing, the interference signal outside filtering band; After descending intermediate-freuqncy signal after treatment is input to successively ALC electrical level control unit and third level amplifier and is exaggerated after filtering, be input to the local oscillation signal mixing of frequency mixer and 944.5M, and export the radiofrequency signal of 869～880MHz; This radiofrequency signal exports antenna transmission through the filtering of Surface Acoustic Wave Filter (SAW), amplifier (model is BG18D), Surface Acoustic Wave Filter (SAW), radio frequency amplifier (model is TQP7M9103), Surface Acoustic Wave Filter (SAW) and linear filter (model is AH420) with after amplifying to by duplexer 306 successively, and region is around covered.
In embodiment of the present utility model, linear filter adopt model be AH420, be because, the P-1 of AH420 reaches 36dBm, it is exported when 27dBm, linearity is still very good, can reach-50dBc of ACPR, can meet index request; When output+27dBm, electric current only has 900mA simultaneously.
In embodiment of the present utility model, upward signal by antenna from being coupled in the air far-end unit 2, first the low noise amplifier (ATF55143) that passes through front end amplifies, and then after Surface Acoustic Wave Filter (SAW), enters into next stage low noise amplifier (SGA6586) and amplifies; After amplifying signal is by ALC level control circuit, enter next stage amplifier (BG18C) and carry out the amplification of signal, the local oscillation signal that enters into afterwards frequency mixer and 944.5M carries out mixing, the intermediate-freuqncy signal of output 115M, finally by the driving amplifier (BG09AG) of final stage, amplify, the signal after amplifying is exported after up detection (AD8361); On the other hand, the signal after amplifying is input to RJ45 network interface through signal separation module 304 after up intermediate-freuqncy signal is closed to the processing such as road, differential transformation, and transmits back expanding element 2 by category-5 cable.
In embodiment of the present utility model, the principle of signal separation module is referring to Fig. 9.The signal receiving from RJ45 network interface, after stopping direct current, carries out differential transformation.Differential transformation is completed and is equilibrated to nonequilibrium impedance transformation by Ba Lun (balun), then carries out isolating SI4432 signal, descending intermediate-freuqncy signal, 24M synchronizing clock signals or up intermediate-freuqncy signal after low-pass filtering or high-pass filtering.
In embodiment of the present utility model, the low-pass filtering in signal separation module 305 and high-pass filtering are realized by discrete devices such as the inductance of various numerical value and electric capacity, and inductance used is the wire-wound inductor of high Q value, to improve the squareness factor of whole filter unit.
It referring to Figure 10, is the confession electrical schematic of the far-end unit of the utility model embodiment.The PSE supply module of expanding element 2 carries out POE power supply by 4,5,7 and 8 lines of category-5 cable, enters into PD and be subject to electric module after signal is Fen Li with power supply.Wherein PSE supply module is subject to electric module by detecting the PD of far-end unit, only detects that it is that the POE of standard is subject to after electric module that PD is subject to electric module, just can power by electric module to PD.POE is subject to the direct voltage of the rear output+12V of the normal work of electric module, and after DC/DC module is carried out voltage transformation, output+5V direct current, supplies with the amplifier tube work of far-end unit 3.Simultaneously by LDO(linear voltage regulator) general+5V voltage transitions is+3.3V and+two kinds of voltages of 3V, supply with respectively MCU and phase-locked loop VCO.DC/DC module comprises power conversion chip, and its model is MP2565.
Referring to Fig. 7, in the utility model embodiment, up detection and descending detection adopt the chip that model is hmc1010lp4 to realize, and this chip is the detection of RMS average, can carry out effective detection to the signal of the standards such as GSM, CDMA2000.The voltage of detection output is except sending back to MCU processes, and the level that is also input to operational amplifier and setting carries out integration and comparison operation, and finally output is used for the radio frequency output of control circuit, i.e. ALC level control.
SI4432 communication module comprises radio transmitting and receiving chip SI4432, and configuration and the transmitting-receiving of SI4432 being carried out to data by MCU303 are controlled.This signal of communication is coupled on down link and by category-5 cable after by a high-pass filtering circuit and transfers to expanding element, realizes communicating by letter of expanding element and far-end unit.
In embodiment of the present utility model, PLL_VCO adopts the chip that model is LMX2531PLL_VCO, and this chip has quite low phase noise, low-power consumption, the features such as the frequency adjustable extent of wide region, can reach+5dBm of output.Frequency mixer is selected the features such as model is the chip of MAMXSS0012, and it is high that this chip has P-1, and OIP3 is high, and interport isolation is high, and cost performance is high, frequency application wide ranges, is highly suitable for field of mobile communication and uses.
The indoor and outdoor compartment system of the wireless communication signals of embodiment of the present utility model adopts frequency-conversion processing in expanding element, makes the transmission of the frequency adaptation category-5 cable of signal, can not cause large loss.In far-end unit, adopt frequency conversion and gain to adjust (AGC), and the gain adjustment of uplink and downlink link is synchronous.By detecting the amplitude of input reference clock, judge the length of the category-5 cable that connects between far-end unit and expanding element, thereby ATT numerical control decay is carried out to reasonably decay to be arranged, with remaining unchanged of keeping system gain, can realize substantially constant that keeping system gains the in the situation that of various line length.
The difficult problems such as the mobile call between the intensive buildings such as the indoor and outdoor compartment system of the wireless communication signals of embodiment of the present utility model, can realize intensive low rise buildings group is carried out to multiple services signal covering, solution villages within the city and the online of AP focus; And can reduce costs, reduce difficulty of construction and property and coordinate difficulty; By gain, adjust and realize when different category-5 cables are long, guarantee that the gain of whole system is constant.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not departing from the scope situation that the utility model aim and claim protect, also can make a lot of forms, within these all belong to protection of the present utility model.
Claims (10)
1. an indoor and outdoor compartment system for wireless communication signals, is characterized in that, comprising: master unit, expanding element and far-end unit, and described master unit is by optical fiber and the communication connection of described expanding element; Described expanding element is by category-5 cable and the communication connection of described far-end unit;
Described master unit for by from base station or the downstream signal that is coupled to of base station zoom out system by Optical Fiber Transmission to described expanding element, and for receiving the upward signal that described expanding element uploads and sending to base station or base station zoom out system;
Described expanding element is for carrying out the downstream signal of described master unit transmission after frequency conversion, amplification and filtering processing, by category-5 cable, be transferred to described far-end unit, and carry out, after frequency conversion, amplification and filtering processing, by Optical Fiber Transmission, arriving described master unit for the upward signal that described far-end unit is transmitted by category-5 cable;
Described far-end unit is for determining the length of the category-5 cable connecing between expanding element and far-end unit by power detection, and the downstream signal described expanding element being transmitted by category-5 cable according to described length carries out after frequency conversion, gain compensation and amplification are processed target area to carry out signal covering, and for the upward signal by antenna-coupled being carried out after frequency conversion, gain compensation and amplification are processed being transferred to described expanding element by category-5 cable according to described length.
2. the indoor and outdoor compartment system of wireless communication signals according to claim 1, it is characterized in that, described expanding element comprises RJ45 shunt module, the first upward signal processing module, the first downstream signal processing module, the first power splitter, the second power splitter, the first optical module and the second optical module;
Wherein, described RJ45 shunt module is connected with described the first upward signal processing module and the first downstream signal processing module respectively; Described the first power splitter is connected with described the first downstream signal processing module and the first optical module respectively; Described the second power splitter is connected with described the first upward signal processing module and the first optical module respectively; Described the second optical module is connected with described the first power splitter and the second power splitter respectively;
For described RJ45 shunt module is closed, signal behind road amplifies described the first upward signal processing module, be transferred to described the second power splitter after filtering and frequency-conversion processing;
Described the second power splitter is transferred to described the first optical module after the signal of described the first upward signal processing module signal after treatment and the transmission of the second optical module is closed to road;
Described the first optical module is for the signal of described the second power splitter transmission is modulated on light signal and by Optical Fiber Transmission and arrives described master unit, and for by described master unit, by the modulated light signal of Optical Fiber Transmission, to carry out opto-electronic conversion be radiofrequency signal and be transferred to described the first power splitter;
Described the first power splitter is for the radiofrequency signal of described the first optical module transmission is divided into two-way, and wherein a road is transferred to described the second optical module, and another road is transferred to described the first downstream signal processing module;
Described the first downstream signal processing module is transferred to described RJ45 shunt module for the signal of the first power splitter transmission is carried out after filtering, frequency conversion and amplification are processed;
Described RJ45 shunt module carries out by category-5 cable, being transferred to described far-end unit after shunt for the signal that described the first downstream signal processing module is transmitted, and is transferred to described the first upward signal processing module after closing road for the upward signal that described far-end unit is transmitted by category-5 cable;
Described the second optical module is for being modulated to light signal by the signal of described the first power splitter transmission, be transferred to the next stage expanding element of connecting with described expanding element, and be transferred to described the second power splitter after being converted to radiofrequency signal for the uplink optical signal that the next stage expanding element of described series connection is transmitted.
3. the indoor and outdoor compartment system of wireless communication signals according to claim 2, is characterized in that, described the first upward signal processing module comprises the first filtering and amplifying circuit, the first frequency changer circuit and the first gain-adjusted and the filtering and amplifying circuit that connect successively;
Described the first downstream signal processing module comprises the filter circuit, the second frequency changer circuit and the second gain-adjusted and the filtering and amplifying circuit that connect successively;
Wherein, described the first frequency changer circuit and the second frequency changer circuit include frequency mixer, for by the signal receiving and local oscillation signal mixing so that signal is carried out to frequency-conversion processing.
4. the indoor and outdoor compartment system of wireless communication signals according to claim 3, it is characterized in that, described expanding element also comprises: the monitoring module being connected with described the first optical module, the first power splitter, the second power splitter, the first upward signal processing module and the first downstream signal processing module respectively;
Described monitoring module is for monitoring and arrange the parameters of whole expanding element.
5. the indoor and outdoor compartment system of wireless communication signals according to claim 3, is characterized in that, a described master unit connects eight described expanding elements; A described expanding element connects eight described far-end units.
6. the indoor and outdoor compartment system of wireless communication signals according to claim 5, it is characterized in that, between eight described expanding elements, by optical fiber pigtail, connect, or drag eight optical module parallel connections by one of master unit, or drag eight optical module parallel connections by one of master unit 1, then connect by optical fiber pigtail.
7. the indoor and outdoor compartment system of wireless communication signals according to claim 2, it is characterized in that, described RJ45 shunt module comprises: the one or two power splitter, the two or two power splitter, the three or two power splitter, the four or two power splitter, the five or two power splitter, the six or two power splitter, the first balun, the second balun, the 3rd balun, the 4th balun, the 5th balun, the 6th balun, the 7th balun, the 8th balun, the one RJ45 network interface, the 2nd RJ45 network interface, the 3rd RJ45 network interface and the 4th RJ45 network interface,
Wherein, described the one or two power splitter connects respectively the two or two power splitter and the three or two power splitter; The two or two power splitter is connected with the first balun and the second balun respectively; The three or two power splitter is connected with the 3rd balun and the 4th balun respectively;
Described the four or two power splitter connects respectively the five or two power splitter and the six or two power splitter; The five or two power splitter is connected with the 5th balun and the 6th balun respectively; The six or two power splitter is connected with the 7th balun and the 8th balun respectively;
Described the first balun is connected with a RJ45 network interface with the 5th balun; The second balun is connected with the 2nd RJ45 network interface with the 6th balun; The 3rd balun is connected with the 3rd RJ45 network interface with the 7th balun; The 4th balun is connected with the 4th RJ45 network interface with the 8th balun;
Described the one or two power splitter is connected with described the first downstream signal processing module; Described the four or two power splitter is connected with described the first upward signal processing module.
8. the indoor and outdoor compartment system of wireless communication signals according to claim 1, it is characterized in that, described far-end unit comprises signal separation module, duplexer, the second upward signal processing module, the second downstream signal processing module, signal detection module and MCU;
Described signal separation module is connected with described the second upward signal processing module and the second downstream signal processing module respectively; Described the second upward signal processing module is connected with described duplexer respectively with the second downstream signal processing module; Described MCU is connected with described signal detection module; Described signal detection module is connected with described signal separation module;
Described signal separation module separates and is transferred to described the second downstream signal processing module for the downstream signal that described expanding element is transmitted, and by category-5 cable, is transferred to described expanding element after closing road and differential transformation processing for the upward signal that the second upward signal processing module transmission is come;
Described the second downstream signal processing module is for carrying out isolated described signal separation module downstream signal to be transferred to described duplexer after filtering, amplification and frequency-conversion processing;
Described duplexer is fed on antenna and launches for the signal that described the second downstream signal processing module transmission is come, and for by antenna from the uplink signal transmissions of aerial coupling to the second upward signal processing module;
Described the second upward signal processing module is transferred to described signal separation module for the upward signal of duplexer transmission is amplified, after filtering and frequency-conversion processing;
Described signal detection module is for carrying out detection to the input of 24MHz synchronised clock;
Described MCU judges the line length of the category-5 cable between described expanding element and far-end unit for the detecting circuit obtaining by described detection, and for regulate the gain of described the second upward signal processing module and described the second downstream signal processing module according to described line length, to realize descending and automatic gain control up link.
9. the indoor and outdoor compartment system of wireless communication signals according to claim 8, is characterized in that, described the second downstream signal processing module comprises the 3rd gain-adjusted and filtering and amplifying circuit, the 3rd frequency changer circuit and the second filtering and amplifying circuit that connect successively;
Described the second upward signal processing module comprises the 3rd filtering and amplifying circuit, the 4th frequency changer circuit and amplification and the gain adjustment circuit that connect successively;
Described the 3rd frequency changer circuit and the 4th frequency changer circuit include frequency mixer, for by the signal receiving and local oscillation signal mixing so that signal is carried out to frequency-conversion processing;
Described the 3rd gain-adjusted and filtering and amplifying circuit and amplification and gain adjustment circuit are according to the adjusting of the described MCU adjustment that gains.
10. the indoor and outdoor compartment system of wireless communication signals according to claim 8, is characterized in that, described signal detection module comprises power detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523718.XU CN203590465U (en) | 2013-08-26 | 2013-08-26 | Indoor and outdoor distribution system of wireless communication signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320523718.XU CN203590465U (en) | 2013-08-26 | 2013-08-26 | Indoor and outdoor distribution system of wireless communication signal |
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| CN203590465U true CN203590465U (en) | 2014-05-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117771A (en) * | 2013-01-23 | 2013-05-22 | 杭州电子科技大学 | Method for combining uplink of CDMA 2000 digital repeater |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
| CN109818665A (en) * | 2017-11-17 | 2019-05-28 | 上海金阵半导体科技有限公司 | Wireless signal expansion system and wireless signal extension head end and terminal |
-
2013
- 2013-08-26 CN CN201320523718.XU patent/CN203590465U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117771A (en) * | 2013-01-23 | 2013-05-22 | 杭州电子科技大学 | Method for combining uplink of CDMA 2000 digital repeater |
| CN103117771B (en) * | 2013-01-23 | 2015-03-25 | 杭州电子科技大学 | Method for combining uplink of CDMA 2000 digital repeater |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
| CN109818665A (en) * | 2017-11-17 | 2019-05-28 | 上海金阵半导体科技有限公司 | Wireless signal expansion system and wireless signal extension head end and terminal |
| CN109818665B (en) * | 2017-11-17 | 2022-03-18 | 上海金阵半导体科技有限公司 | Wireless signal extension system, wireless signal extension head end and terminal |
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Denomination of utility model: Indoor and outdoor distribution system of wireless communication signal Effective date of registration: 20140801 Granted publication date: 20140507 Pledgee: Shenzhen high tech investment and financing Company limited by guarantee Pledgor: SHENZHEN HOWAH NETWORK COMMUNICATION Co.,Ltd. Registration number: 2014990000623 |
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Address after: 518000, room 801, B, science and Technology Pioneer Park, Tian An Digital City, Guangdong, Shenzhen Patentee after: SHENZHEN HOWAH NETWORK COMMUNICATION CO.,LTD. Address before: 518000, building 9, 4 North District, Pingshan Industrial Park, Taoyuan street, Nanshan District, Guangdong, Shenzhen, China Patentee before: SHENZHEN HOWAH NETWORK COMMUNICATION Co.,Ltd. |
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