CN103379612A - Power supply method of indoor distribution system by use of antenna feeder and system - Google Patents
Power supply method of indoor distribution system by use of antenna feeder and system Download PDFInfo
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Abstract
The invention relates to a power supply method of an indoor distribution system by use of an antenna feeder and a system. According to the invention, a wireless signal and a DC power signal are modulated and combined through a splitter, a combiner and other devices; transmission is then carried out through an original antenna feeder of the indoor distribution system; and separation and reduction of signals are carried out ultimately via a separator, a gain module and other devices. Therefore, the purpose of DC power supply transmission by use of the antenna feeder is achieved.
Description
Technical field
The present invention relates in the wireless communication system, indoor distributed system utilizes the method and system of antenna feeder power supply, especially utilizes antenna feeder to be the method and apparatus of the wireless signal transceiver power supply of chamber subsystem.
Background technology
In order to satisfy people's growth to the wireless communication signals demand in building, indoor distributed system distributing antenna system (DAS) appearred, i.e..DAS adopts optical cable technology to small active antenna active distributing signal in building.This system need to establish a base station in building, but can allow signal carry out more effectively launching from each point of building more reliablely.
In order to give the power terminal equipment of distributing antenna system, need Power Source Equipment to offer dried station, repeater etc. of putting in the building by the cable DC power supply that terminal equipment is required.Simultaneously, these equipment also need to transmit various radiofrequency signals by active antenna feeder.Because these equipment are installed in the building, such as ceiling and other places, power supply is trouble very, and maintenance cost is too high.
Summary of the invention
The purpose of this invention is to provide a kind of radiofrequency signal (RF) and direct current (DC) mixed transfer system and method, transmit the required DC power supply of DAS system terminal equipment by active antenna feeder, to reduce the installation and maintenance difficulty of terminal equipment.
In order to realize purpose of the present invention, at first provide a kind of indoor distributed system to utilize the method for antenna feeder power supply, may further comprise the steps:
1) determines the ceiling voltage that the antenna feeder remote transmission is powered in the indoor distributed system, make the DC power supply module according to described ceiling voltage output DC source;
2) after power splitter of signal source and DC power supply carries out the power division of signal source and DC power supply respectively to the n road signal source of indoor distributed system and described DC power supply, the active signal of output n road band direct voltage, wherein, n is more than or equal to 1;
3) described n road composite signal synthesizes mixed signal via corresponding signal source and DC power supply mixer, transfers to signal source and DC power supply secondary power splitter by antenna feeder;
4) after signal source and DC power supply secondary power splitter carry out power division to described mixed signal, be reduced to the active signal of n road band direct voltage, transfer to the corresponding signal receiving/transmission device of each signal source place via antenna feeder;
5) described signal receiving/transmission device place is provided with signal source and DC power supply separator, offers respectively signal receiving/transmission device after described active signal with direct voltage is separated into signal source and DC power supply, and wherein, DC power supply is used to the signal receiving/transmission device power supply.
After the DC power supply that said method is required with terminal equipment (being wireless signal transceiver) and radio signal source are closed the Lu Bingjing ovennodulation, in indoor distributed system, be transferred to terminal equipment by active antenna feeder, saved on the one hand the wiring cost of direct current transmission, improve on the other hand the utilance of antenna feeder, reduced the system maintenance demand.
According to purpose of the present invention, also provide a kind of indoor distributed system to utilize the system of antenna feeder power supply, be indoor distribution antenna feeder electric power system, comprising:
The DC power supply module is used for the ceiling voltage that definite indoor distributed system antenna feeder remote transmission is powered, and provides the 48-90V DC power supply according to described ceiling voltage;
Power splitter of signal source and DC power supply, be used for receiving the DC power supply of DC power supply module output and the n road wireless signal of indoor distributed system, and DC power supply and signal source carried out respectively the active signal of output n road band direct voltage after the power division, wherein, n is more than or equal to 1;
Signal source and DC power supply mixer are used for the active signal of the n road band direct voltage of signal source and a power splitter output of DC power supply is closed the road, and the output mixed signal, transfer to signal source and DC power supply secondary power splitter by antenna feeder;
Signal source and DC power supply secondary power splitter are used for mixed signal is carried out power division, export respectively the active signal of n road band direct voltage, transfer to signal source and DC power supply separator by antenna feeder;
Signal source and DC power supply separator; Be used for to be separated into active signal with the active signal of direct voltage and DC power supply is exported respectively.
Individual module in the said system is to utilize the devices such as corresponding power supply, power splitter, mixer and separator in the existing system, the function of these devices is improved, thereby made them jointly finish the purpose of utilizing antenna feeder transmission DC power supply.About concrete function and the implementation of these modules will encyclopaedize in an embodiment of the present invention.
Technique effect of the present invention is, is the terminal equipment of DAS system by antenna feeder, powers such as the dried remote transmission such as station, repeater of putting, and takes full advantage of resource, has solved the power supply difficult problem of these terminal equipments in building.The present invention also will have active and passive compartment system scheme now and carry out perfect integration, overcome separately shortcoming of active and passive compartment system, reduce difficulty of construction and cost.
Description of drawings
Fig. 1 is the schematic diagram of indoor distribution antenna feeder electric power system most preferred embodiment of the present invention;
Fig. 2 is the structural representation of signal source and a power splitter of DC power supply among Fig. 1;
Fig. 3 is the schematic diagram that signal source among Fig. 2 (RF) and DC power supply (DC) are closed road anti-interference filtration lightning protection device;
Fig. 4 is the structural representation of the automatic ride gain module of power splitter among Fig. 1;
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described.
Groundwork principle of the present invention is: when satisfying existing transmission of wireless signals, adopt different carrier counter modulation technology that DC power supply is passed through signal source (RF) and DC power supply (DC) mixer, signal source (RF) and equipment such as power splitter of DC power supply (DC) are fed to direct current on the antenna feeder, then adopt signal source (RF) and DC power supply (DC) secondary power splitter, the equipment such as signal source (RF) and DC power supply (DC) separator extract power terminal equipment to indoor distributed system with direct current from radio frequency antenna feeder cable, thereby solve the dried apparatus remote transmission powerup issue such as repeater of putting of RRU.
For the ease of understanding more intuitively purpose of the present invention and concrete technological means, below illustrate respectively that by two most preferred embodiments indoor distributed system utilizes the method and system of antenna feeder power supply.For the ease of understanding, below at first explanation be the system that indoor distributed system utilizes the antenna feeder power supply, i.e. indoor distribution antenna feeder electric power system.
As shown in Figure 1, indoor distribution antenna feeder electric power system most preferred embodiment comprises DC power supply module, signal source and power splitter of DC power supply (power splitter of RF and DC), signal source and DC power supply mixer (RF-DC mixer), DC power supply is boosted and control module, signal source and DC power supply secondary power splitter (RF and DC secondary power splitter), the automatic ride gain module of power splitter, signal source and DC power supply separator (RF-DC separator).Wherein, DC power supply module and DC power supply are boosted and can be arranged in the Power Source Equipment of powering into indoor distributed system with control module.In the present embodiment, the DC power supply module is a DC-DC48-90V supply module in the Power Source Equipment, and DC power supply is boosted and control module is secondary DC-DC48-90V power supply boost module in the Power Source Equipment.Below describe function and the implementation of each module in detail.
1, DC power supply module (being a DC-DC48-90V supply module in the present embodiment) is used for the ceiling voltage that definite indoor distributed system antenna feeder remote transmission is powered, and provides the 48-90V DC power supply according to described ceiling voltage.In the present embodiment, what this module adopted is Intersil DC-DC POL ISL8200M power module, and the IC of it is integrated PWM controller, driver, power fet, inductor, support discrete component also has the compensating circuit of optimizing.This power supply possesses expanded function and computing function able to programme, can be to use according to diverse ways.This power supply can be expanded according to the demanded power output of its electric current share framework, and this module adopts heat-resisting enhancement mode encapsulation, highly only is 2.2mm, so it can easily be installed in indoor distribution passive device the inside.
Utilize the θ J/C value of the low-down 2C/W thermal resistance of Intersil DC-DC POL ISL8200M package bottom, most heat can dissipate by package bottom and the safe through hole of passive device, and to the ground plane of appearance of device, finally a 360W POL power supply solution the highest can be installed on the indoor distribution passive device.ISL8200M can support whole temperature range from being lower than 10A up to the load current up to 60A.Each independently power module can support separately the output current of 10A, these modules can be together in parallel, and the output current up to 60A is provided.
2, power splitter of signal source and DC power supply, be used for receiving the DC power supply of DC power supply module output and the n road wireless signal of indoor distributed system, and DC power supply and signal source are carried out respectively the active signal of output n road band direct voltage after the power division, wherein, n is more than or equal to 1.
In order to prevent that outside direct current from causing the decay of interference and signal to signal source (RF), the present invention improves mixer of the prior art, increased signal source (RF) and DC power supply (DC) is closed road anti-interference filtration lightning protection device, as shown in Figure 2.The Main Function of lightning protection device is the synthetic and lightning protection to direct current ground and signal seedbed.Wherein, a kind of implementation that signal source (RF) and DC power supply (DC) are closed road anti-interference filtration arrester circuit as shown in Figure 3, Main Design Principles is as follows:
A) value of discharge resistance is in situation about allowing, and resistance value requires the smaller the better, needs to consider following situation:
The first, resistance requires to adopt the secondary derate to use, and guarantees reliability.The derate coefficient is 0.75V, 0.6W.Can obtain 2/ (0.6Pe) of n＞(0.75Ve) according to Ohm's law
The second, through behind the lightning surge residual voltage is arranged, its instantaneous value is generally in the 1000V value; Its instantaneous power value can not surpass 4 times of power-handling capability, also can obtain 2/ (4Pe) of R＞(Vcy).Both consider and get the R value, and generally speaking, the value of resistance R is between the 75-200K.Power is 2-3W.Metal pattern resistance.
B) value of Cx electric capacity is in situation about allowing, and capacity requirement is the bigger the better, and its value is difficult to estimate definitely, generally speaking, requires value (to each electric capacity) between 1-5uf.The withstand voltage of electric capacity must have residual voltage through value behind the lightning surge, and its instantaneous value does not generally damage when 1000V/s, chooses by the principle of secondary derate, and value is at 275V, and frequency characteristic is relevant with the value of electric capacity, and value is less, and frequency characteristic is better.
C) value of Cy electric capacity is in situation about allowing, and capacity requirement is the bigger the better, and its value is difficult to estimate definitely, but can not be too large, and too greatly then leakage current is larger, generally speaking, requires value (to each electric capacity) between 2200-4700pf.The withstand voltage of electric capacity must have residual voltage through value behind the lightning surge, and its instantaneous value does not generally damage when 1000V/S, choose by the principle of secondary derate, and value 275V, frequency characteristic is relevant with the value of electric capacity, and value is less, and frequency characteristic is better.Cx electric capacity and Cy electric capacity all are the requirements of satisfying capacity by less Capacitance parallel connection generally, and the high frequency characteristics of filter is good like this.
D) selection principle of the value material of inductance---consider from the following aspects: the first, the frequency range of core material is wide, guarantee highest frequency at 1GHz, and more stable magnetic permeability is namely arranged in very wide frequency range.The second, magnetic permeability is high, but be difficult in practice satisfy this requirement, so magnetic permeability often segmentation is considered.Core material generally is ferrite.The estimation of inductance value---consider impedance and frequency.Common mode choke value 1.5-5mH, the differential mode choke coil value is 10-50uH.
3, signal source and DC power supply mixer are used for the active signal of the n road band direct voltage of signal source and a power splitter output of DC power supply is closed the road, and the output mixed signal, transfer to signal source and DC power supply secondary power splitter by antenna feeder.The design principle of signal source and DC power supply mixer is identical with a power splitter, and also being increases signal source (RF) on the basis of existing mixer and DC power supply (DC) is closed road anti-interference filtration lightning protection device, just no longer repetition.
4, signal source and DC power supply secondary power splitter are used for mixed signal is carried out power division, export respectively the active signal of n road band direct voltage, transfer to signal source and DC power supply separator by antenna feeder.The design principle of signal source and DC power supply secondary power splitter is identical with a power splitter, and also being increases signal source (RF) on the basis of existing power splitter and DC power supply (DC) is closed road anti-interference filtration lightning protection device, just no longer repetition.
5, signal source and DC power supply separator are used for being separated into active signal with the active signal of direct voltage and DC power supply is exported respectively.This device can adopt separator of the prior art, also can increase signal source (RF) on the basis of existing separator and DC power supply (DC) is closed road anti-interference filtration lightning protection device.
6, DC power supply is boosted and control module (secondary DC-DC48-90V power boost module), is used for the mixed signal of signal source and the output of DC power supply mixer is boosted and the DC circuit interference filter.In the present embodiment, what secondary DC-DC48-90V power supply boost module was selected is the P89LPC936 single-chip microcomputer, this chip adopts enhancement mode 8051 kernels, speed is 6 times of standard 8051, built-in 4KB Flash program storage, 256B ram in slice, 2 16bit Timer/Counter, 184 passage successive approximation analog-to-digital conversion modules (ADC1) and 1 DAC module (DAC0), up to 26 I/O mouths, nearly all input pin all has the anti-interference filtration function, and built-in hardware watchdog, under software cooperated, antijamming capability was very strong.
The P89LPC936 single-chip microcomputer can pass through Intersil DC-DC POL ISL8200M module samples circuit Real-time Collection antenna feeder remote transmission supply power voltage and electric current, determine the voltage and current of next stage through internal calculation, then sending control signal was given the size of Intersil DC-DC POL ISL8200M module controls charging current and voltage, and coordinated other each peripheral circuit module work.
7, the automatic ride gain module of power splitter is used for adjusting first the gain ranging of signal before described signal source is separated described active signal with direct voltage with the DC power supply separator.
In the present embodiment, the automatic ride gain module of power splitter adopts the two-stage radio-frequency agc circuit to control respectively the gain of up link input and output, reaches the purpose of automatic control power output, and its structure as shown in Figure 4.In the present embodiment, gain module adopts PIC16F878-DFP single-chip microcomputer and DAC5687-2 digital-to-analogue 32 bit pads and AD8318 power detection controller (being forward and reverse power-sensing circuit), and adopts the single-chip microcomputer based on the AVR risc architecture of Low-Power CMOS explained hereafter to use serial communication.Numerical control partly realizes automatic monitoring and the adjusting to power, gain, level, standing wave, temperature, grid voltage etc.Miniature DC-DC POL ISL8200M power supply is responsible for providing the electric current and voltage of automatic ride gain module work.Gain module shown in Figure 4 is the custom circuit of this area, is not described in detail herein.
8, DC/DC disperses the self adaptation rectifier, after the DC power supply of signal source and the output of DC power supply separator is carried out the direct current rectification, offers signal receiving/transmission device.Rectifier is the common device of this area, can directly select as required existing product.
More than describe structure and the detailed functions of indoor distribution antenna feeder electric power system in detail, native system is by the transformation to existing power splitter, mixer and separator, realized the road of closing of signal source and DC power supply, and transmit by antenna feeder, improve the utilance of each device of indoor distributed system and antenna feeder, reduced cost of equipment maintenance.Those skilled in the art will be understood that, above-described embodiment only is one of best implementation of the present invention, in other embodiments of the invention, indoor distribution antenna feeder electric power system can also only comprise the DC power supply module, power splitter of signal source and DC power supply, signal source and DC power supply mixer, signal source and DC power supply secondary power splitter, these five basic modules of signal source and DC power supply separator, just can substantially realize purpose of the present invention, other modules such as DC power supply are boosted and control module, the automatic ride gain module of power splitter, DC/DC disperses the self adaptation rectifier to be combined into new embodiment with five basic modules respectively.
Below introduce the method that indoor distributed system of the present invention utilizes antenna feeder power supply by a most preferred embodiment, the method comprises the steps:
Step 1: determine the ceiling voltage of antenna feeder remote transmission power supply in the indoor distributed system, make the DC power supply module according to described ceiling voltage output DC source;
This step can also be decomposed into following three steps: the DC power supply module sends N Reference Alignment voltage, and N Reference Alignment voltage is transferred to modules in the indoor distributed system by antenna feeder; Each module utilizes respectively self built-in miniature dc-dc sending module to be sent to successively the DC power supply module with the voltage reversal that has recorded magnitude of voltage; The DC power supply module compares voltage value data and the built-in standard voltage value of the point that each module gathers, and determines the maximum voltage value that native system antenna feeder remote transmission is powered according to result relatively.
Particularly, can send N Reference Alignment voltage (for example 55V) by the DC power supply module, N Reference Alignment voltage is transferred to modules in the indoor distribution antenna feeder electric power system by antenna feeder, and each module utilizes respectively self built-in miniature dc-dc sending module to be sent to successively with the voltage reversal that has recorded magnitude of voltage that DC power supply is boosted and control module.DC power supply boost and control module with each module gather the point voltage value data and built-in standard voltage value compare, draw the magnitude of voltage (for example 3V) that needs compensation, and determine the maximum voltage value (57V) of native system antenna feeder remote transmission power supply according to the magnitude of voltage of compensation.
Wherein, DC power supply is boosted and is referred to that with the built-in standard voltage value of control module (for example, the dc resistance of feeder line commonly used is: 1.48 ohm/KM of inner wire, 1.90 ohm/KM of outer conductor according to the magnitude of voltage of the different section feeder lines of the length calculated in advance of antenna feeder in system.Can calculate accordingly a certain magnitude of voltage of pointing out in antenna feeder length).Therefore each module distribution in the system gathers magnitude of voltage at these aspects and can reflect that the base station correction voltage is in the pressure drop of the different sections of antenna feeder on each aspect of antenna feeder.By the actual pressure drop value of modules feedback, DC power supply boost and control module can to the mixed signal of mixer output carry out anti-interference filtration and boost after export to again RF and DC secondary power splitter.
Step 2: after power splitter of signal source and DC power supply carries out the power division of signal source and DC power supply respectively to the n road signal source of indoor distributed system and described DC power supply, the active signal of output n road band direct voltage, wherein, n is more than or equal to 1;
The signal source of indoor distributed system can be various passive or active radiofrequency signals, includes but not limited to the various wireless communication RF signals such as WLAN, GSM, CDMA, TD-SCDMA.Therefore, entering signal source and a power splitter of DC power supply can be one tunnel (n=1) or multiple signals (n＞1).Particularly, be provided with signal enhancing isolator in signal source and the DC power supply power splitter signal source is once isolated, also be provided with the lightning protection that lightning protection device is used for antenna transmission system.There is the explanation of signal source and DC power supply isolation lightning protection device to please refer to aforementioned introduction to indoor distribution antenna feeder electric power system.
In other embodiments of the invention, in order to improve system reliability, can also back up the output of signal source and a power splitter of DC power supply, namely export again one tunnel identical signal to another mixer.As the online Hot Spare of the mixer of backup and the signal of output thereof, in order to when main path signal breaks down, in time come into operation.
Step 3: described n road composite signal synthesizes mixed signal via corresponding signal source and DC power supply mixer, transfers to signal source and DC power supply secondary power splitter by antenna feeder;
Further, can also utilize DC power supply boost and control module the mixed signal of the output of signal source and DC power supply mixer is carried out the filtering of disturbing for DC circuit and suppress after export to signal source and DC power supply secondary power splitter, can reduce like this indoor distributed system owing to inserted the loss that the modules such as power splitter cause.
Step 4: after signal source and DC power supply secondary power splitter carry out power division to described mixed signal, be reduced to the active signal of n road band direct voltage, transfer to the corresponding signal receiving/transmission device of each signal source place via antenna feeder; Wherein, signal receiving/transmission device is the terminal equipment of indoor distributed system, such as trunk amplifier or domestic aerial etc.
Step 5: by the automatic ride gain module of power splitter described active signal with direct voltage is carried out the strong and weak of signal and automatically export to described separator after the adjustment.This step is the signal set-up procedure, in other embodiments of the invention, can not comprise this step.
Step 6: described signal receiving/transmission device place is provided with signal source and DC power supply separator, offer respectively signal receiving/transmission device after described active signal with direct voltage is separated into signal source and DC power supply, wherein, DC power supply is used to the signal receiving/transmission device power supply.
Wherein, the DC power supply of separator output can also disperse the self adaptation rectifier to carry out powering to signal receiving/transmission device after the rectification by DC-DC again.
Step 1 to four has been finished the mixed transfer of signal source and DC power supply, and the active signal of the n road band direct current of signal source and DC power supply power splitter output just can be respectively be transferred to indoor distributed system everywhere at separately antenna feeder.
In addition, the present invention also further provides method for diagnosing faults based on the above method, may further comprise the steps:
DC power supply is boosted and is detected the operating current size of the automatic ride gain module of power splitter and/or signal receiving/transmission device with control module;
When described operating current during greater than 10A, described DC power supply is boosted and control module is then adjusted supply power voltage to the automatic ride gain module of described power splitter and/or signal receiving/transmission device, until described operating current is less than 10A;
Perhaps be adjusted to the upper limit 90V of supply power voltage and described operating current during still greater than 10A when voltage, DC power supply is boosted and control module is then cut off the concurrent alarm of being out of order of power supply to the automatic ride gain module of described power splitter and/or signal receiving/transmission device.
In order to understand better the present invention, we are again for the example of a more complicated, suppose in step 2, power splitter of signal source and DC power supply receives the input of WLAN, GSM and CDMA three tunnel signal sources and DC power supply altogether, so in step 3, because the road of closing that signal source and DC power supply mixer carry out just is not only that simple RF-DC closes the road, but multichannel RF-DC closes the road.That is, need to close the road with DC power supply again after the radiofrequency signal coupling with three frequency ranges first.Equally, be exactly the signal source of three road band direct voltages in step 5 output.This three road signal transmits in WLAN, GSM and CDMA indoor distributed system antenna feeder separately respectively.Wherein one the tunnel is separated with the power supply separator by signal source after the WLAN antenna feeder amplifies through gain.Isolated WLAN signal enters WLAN trunk amplifier and the lower AP that hangs thereof; Isolated power supply is then by being the power supply of WLAN trunk amplifier behind the DC-DC self adaptation rectifier.Similarly, the signal of two-way charged is also processed to power terminal equipment through similar in addition.
Claims (12)
1. the method that indoor distributed system utilizes antenna feeder to power is characterized in that, may further comprise the steps:
1) determines the ceiling voltage that the antenna feeder remote transmission is powered in the indoor distributed system, make the DC power supply module according to described ceiling voltage output DC source;
2) after power splitter of signal source and DC power supply carries out the power division of signal source and DC power supply respectively to the n road signal source of indoor distributed system and described DC power supply, the active signal of output n road band direct voltage, wherein, n is more than or equal to 1;
3) described n road composite signal synthesizes mixed signal via corresponding signal source and DC power supply mixer, transfers to signal source and DC power supply secondary power splitter by antenna feeder;
4) after signal source and DC power supply secondary power splitter carry out power division to described mixed signal, be reduced to the active signal of n road band direct voltage, transfer to the corresponding signal receiving/transmission device of each signal source place via antenna feeder;
5) described signal receiving/transmission device place is provided with signal source and DC power supply separator, offers respectively signal receiving/transmission device after described active signal with direct voltage is separated into signal source and DC power supply, and wherein, DC power supply is used to the signal receiving/transmission device power supply.
2. the method for claim 1 is characterized in that, described step 1) further comprising the steps of:
The DC power supply module sends N Reference Alignment voltage, and N Reference Alignment voltage is transferred to modules in the indoor distributed system by antenna feeder;
Each module utilizes respectively self built-in miniature dc-dc sending module to be sent to successively the DC power supply module with the voltage reversal that has recorded magnitude of voltage;
The DC power supply module compares voltage value data and the built-in standard voltage value of the point that each module gathers, and determines the maximum voltage value that native system antenna feeder remote transmission is powered according to result relatively.
3. the method for claim 1, it is characterized in that, in described step 4) and 5) between also comprise the signal set-up procedure: strong and weak export to described separator after automatically adjusting by the automatic ride gain module of power splitter to what described active signal with direct voltage carried out signal.
4. the method for claim 1 is characterized in that, described step 5) also comprise: the DC power supply of described separator output disperses to power to described signal receiving/transmission device behind the self adaptation rectifier through DC-DC again.
5. such as claim 1 or 3 described methods, it is characterized in that, also comprise troubleshooting step:
DC power supply is boosted and is detected the operating current size of the automatic ride gain module of power splitter and/or signal receiving/transmission device with control module;
When described operating current during greater than 10A, described DC power supply is boosted and control module is then adjusted supply power voltage to the automatic ride gain module of described power splitter and/or signal receiving/transmission device, until described operating current is less than 10A;
Perhaps be adjusted to the upper limit 90V of supply power voltage and described operating current during still greater than 10A when voltage, DC power supply is boosted and control module is then cut off the concurrent alarm of being out of order of power supply to the automatic ride gain module of described power splitter and/or signal receiving/transmission device.
6. the method for claim 1 is characterized in that, described signal source is one or more in the following wireless signal: TD-SCDMA, GSM, WCDMA, WLAN.
7. require 1 described method such as power, it is characterized in that described signal receiving/transmission device is trunk amplifier or domestic aerial.
8. an indoor distribution antenna feeder electric power system is characterized in that, comprising:
The DC power supply module is used for the ceiling voltage that definite indoor distributed system antenna feeder remote transmission is powered, and provides the 48-90V DC power supply according to described ceiling voltage;
Power splitter of signal source and DC power supply, be used for receiving the DC power supply of DC power supply module output and the n road wireless signal of indoor distributed system, and DC power supply and signal source carried out respectively the active signal of output n road band direct voltage after the power division, wherein, n is more than or equal to 1;
Signal source and DC power supply mixer are used for the active signal of the n road band direct voltage of signal source and a power splitter output of DC power supply is closed the road, and the output mixed signal, transfer to signal source and DC power supply secondary power splitter by antenna feeder;
Signal source and DC power supply secondary power splitter are used for mixed signal is carried out power division, export respectively the active signal of n road band direct voltage, transfer to signal source and DC power supply separator by antenna feeder;
Signal source and DC power supply separator; Be used for to be separated into active signal with the active signal of direct voltage and DC power supply is exported respectively.
9. system as claimed in claim 8 is characterized in that, comprises that also DC power supply is boosted and control module, is used for the mixed signal of signal source and the output of DC power supply mixer is boosted and the DC circuit interference filter.
10. system as claimed in claim 8 is characterized in that, also comprises the automatic ride gain module of power splitter, is used for adjusting first the gain ranging of signal before described signal source is separated described active signal with direct voltage with the DC power supply separator.
11. system as claimed in claim 10 is characterized in that, the automatic ride gain module of described power splitter comprises the two-stage radio-frequency agc circuit, controls respectively the gain of up link input and output.
12. system as claimed in claim 8 is characterized in that, comprises that also DC/DC disperses the self adaptation rectifier, after the DC power supply of signal source and the output of DC power supply separator is carried out the direct current rectification, offers signal receiving/transmission device.
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| CN106100150A (en) * | 2016-06-17 | 2016-11-09 | 西安交通大学 | A kind of spaced antenna wireless energy transfer network architecture design method |
| CN107005860A (en) * | 2015-05-08 | 2017-08-01 | 京信通信技术(广州)有限公司 | The signal standby system and method for active DAS system near-end machine |
| CN112073144A (en) * | 2020-09-29 | 2020-12-11 | 陕西天基通信科技有限责任公司 | Machine room GPS distribution amplification system without independent power supply and working method |
| CN112367670A (en) * | 2020-10-29 | 2021-02-12 | 北京唯得科技有限公司 | Coaxial feeder line power supply method based on wireless indoor distribution system and passive indoor coverage system |
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| CN112073144A (en) * | 2020-09-29 | 2020-12-11 | 陕西天基通信科技有限责任公司 | Machine room GPS distribution amplification system without independent power supply and working method |
| CN112367670A (en) * | 2020-10-29 | 2021-02-12 | 北京唯得科技有限公司 | Coaxial feeder line power supply method based on wireless indoor distribution system and passive indoor coverage system |
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| CN103379612B (en) | 2016-12-14 |
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