CN101710841A - Radio remote unit of electrically adjustable antenna and electrically adjustable antenna integrating radio remote unit - Google Patents
Radio remote unit of electrically adjustable antenna and electrically adjustable antenna integrating radio remote unit Download PDFInfo
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- CN101710841A CN101710841A CN200810219967A CN200810219967A CN101710841A CN 101710841 A CN101710841 A CN 101710841A CN 200810219967 A CN200810219967 A CN 200810219967A CN 200810219967 A CN200810219967 A CN 200810219967A CN 101710841 A CN101710841 A CN 101710841A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a radio remote unit of an electrically adjustable antenna, which is characterized in that the radio remote unit comprises a physical interface circuit, an intermediate frequency processing circuit, an A/D and D/A conversion circuit, a frequency conversion circuit, a synthesis/distribution network, a controllable phase shifter and a transceiving module, downlink signals sequentially pass through the physical interface circuit, the intermediate frequency processing circuit, the A/D and D/A conversion circuit, the frequency conversion circuit, the synthesis/distribution network, the controllable phase shifter an the transceiving module, and uplink signals sequentially pass through the transceiving module, the controllable phase shifter, the synthesis/distribution network, the frequency conversion circuit, the A/D and D/A conversion circuit, the intermediate frequency processing circuit and the physical interface circuit. The radio remote unit has the advantages of compact structure, simple installation, low power consumption and high performance. The invention further relates to the electrically adjustable antenna integrating the radio remote unit, which comprises the radio remote unit RRU and an antenna part and is characterized in that all or part of the functions of the radio remote unit RRU are integrated in the electrically adjustable antenna. The electrically adjustable antenna integrates all or part of the functions of the RRU, thereby leading the overall performance to be more excellent and leading the installation to be simpler.
Description
(1) technical field:
The present invention relates to a kind of radio frequency remote equipment of electrical tilt antenna and the electrical tilt antenna of integrated this radio frequency remote equipment.
(2) background technology:
Wireless access network front end in the existing mobile communication system is made up of base station equipment and antenna feed parts, and base station equipment generally is installed in indoor, and antenna is installed in cat head, see shown in Figure 1, between them by one section long radio frequency coaxial-cable connection.Simultaneously, in network operation,, need easily the coverage of base station to be adjusted, so a large amount of electrical tilt antenna that adopts in order to improve network communication quality.The principle of electrical tilt antenna is by controlling a drive motors, driving phase shifter and move the phase place that changes each road signal, so need a sets of transmission mechanism and control corresponding equipment.Above-mentioned traditional working mode has the following disadvantages: at first, along with the third generation mobile communication system has adopted higher frequency, it is very big that the loss of radio frequency cable will become, and the cost height of cable, and difficulty is installed; Second, continuous development along with mobile communications network, number of base stations density will progressively increase, Cell Site Placement also will face big difficulty, mounting points not only needs to be fit to the outdoor environment that antenna is installed, also need the place that adapts to the indoor equipment installation, and it is too far away to be separated by between antenna and indoor equipment; At last, realize transmission, driving and the control corresponding installation cost height of electric conditioning function, reliability is low.
Appearing to a certain extent of radio frequency remote technology can solve above-mentioned deficiency preferably, the radio frequency remote technology is divided into base band shared cell BBU and radio frequency remote equipment RRU two parts with the base station, between connect by optical fiber, BBU is installed in indoor, RRU is installed near the antenna end position, sees Fig. 2, shown in Figure 3.RRU comprises physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit and radio-frequency (RF) receiving and transmission module, and physical interface circuit is connected with base band shared cell BBU by optical fiber, and radio-frequency (RF) receiving and transmission module is connected with electrical tilt antenna by radio frequency cable.Electrical tilt antenna generally is installed in top of building or iron tower independently, and electrical tilt antenna comprises array element, feeding network, phase shifter and drive mechanism thereof, and the phase shift drive mechanism is by motor and control controlling links.The technical scheme of above-mentioned employing radio frequency remote equipment does not have the mode of operation of radical change traditional base station, is mainly reflected in: 1) it still needs powerful inefficient emission power amplifier, so power consumption is big, and the cost height, and also low in the outside work reliability; 2) still need additionally to control the motor of electrical tilt antenna and the control assembly of relevant complexity, so have the cost height equally, the deficiency that reliability is low; 3) still need radio frequency cable to be connected between RRU and antenna, have bigger loss, and the cost height of cable, difficulty is installed.4) after upward signal is received by bay, behind feed and phase-shift network, be fed to the transceiver module of RRU again by radio frequency cable, loss of signal is bigger, has reduced the receiving sensitivity of system.
(3) summary of the invention:
The purpose of this invention is to provide a kind of compact conformation, install more succinct, the integrated radio frequency remote equipment of high performance and electrical tilt antenna of low-power consumption.
Another object of the present invention has provided a kind of electrical tilt antenna of integrated RF remote device, its integrated all or part of RRU function, make overall performance more superior, install easier.
The integrated radio frequency remote equipment of the present invention and electrical tilt antenna is to realize by following technical scheme:
A kind of radio frequency remote equipment of electrical tilt antenna, comprise physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, downstream signal is successively by physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, and upward signal is successively by transceiver module, controllable phase shifter, synthetic/distribution network, frequency changer circuit, A/D and D/A change-over circuit, processing circuitry of intermediate frequency and physical interface circuit.
A kind of radio frequency remote equipment of electrical tilt antenna, it is characterized in that: comprise physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, transceiver module and controllable phase shifter, downstream signal passes through physical interface circuit successively, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, transceiver module and controllable phase shifter, upward signal are passed through controllable phase shifter successively, transceiver module, synthetic/distribution network, frequency changer circuit, A/D and D/A change-over circuit, processing circuitry of intermediate frequency and physical interface circuit.
The radio frequency remote equipment of electrical tilt antenna of the present invention compared with prior art, its advantage is: one) use the small-power power amplifier in the transceiver module of every road, replace the high-power power amplifier of former transceiver module design, can significantly improve power amplification efficiency, reduced power consumption and hardware cost; The second, because global design has reduced the power capacity requirement, thus can adopt electric controllable phase shifter, and next-door neighbour's transceiver module, save traditional CD-ROM drive motor and control corresponding device; Three) save cost height between antenna for base station and base station equipment, the thick coaxial cable of difficulty is installed, bring convenience for the construction, addressing etc. of base station, reduced cost, compact conformation, and improved receiving sensitivity.Four) regulate the radio frequency path that the needed controllable phase shifter of angle of declination is placed on corresponding reception emission respectively, controllable phase shifter is controlled,, realize the electric adjustable of angle of declination easily then to the phase control of each array element by the control command realization of signal path.
Above-mentioned described physical interface circuit is connected by optical fiber with the base band shared cell BBU of base station, and transceiver module directly is connected with the array element of antenna for base station, and the loss of radiofrequency signal is reduced to minimum, promotes signal quality.
Above-mentioned described physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module are to be integrated in a housing the inside, form the RRU equipment of one, compact conformation, volume is little, and is easy for installation.
Above-mentioned described transceiver module comprises low noise amplifier, and low noise amplifier carries out the amplification of upward signal after being right after bay, thereby reduces system noise factor, improves uplink performance.
Above-mentioned described transceiver module comprises duplexer filter and power amplifier, the downlink signal is amplified before connecting the duplexer filter of each or every group of bay, can reduce the significantly power output of each power amplifier, thus the cost that improves power amplification efficiency and reduce power amplifier module.
Above-mentioned described synthesizing/distribution network connects the controllable phase shifter and the transceiver module assembled unit of multichannel, and every road controllable phase shifter directly is connected with one or one group of bay with transceiver module.Use the small-power power amplifier in the transceiver module, power amplification efficiency can significantly be provided, reduce power consumption and hardware cost.
The electrical tilt antenna of integrated RF remote device of the present invention is to realize by following technical scheme:
A kind of electrical tilt antenna of integrated RF remote device comprises radio frequency remote equipment RRU and antenna element, and radio frequency remote equipment RRU is directly installed on the antenna the inside, makes antenna function more perfect, and is easy to install, and structure is compact more.
Above-mentioned described radio frequency remote equipment RRU comprises physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, upward signal passes through physical interface circuit successively, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, downstream signal passes through transceiver module successively, controllable phase shifter, synthetic/distribution network, frequency changer circuit, A/D and D/A change-over circuit, processing circuitry of intermediate frequency and physical interface circuit, transceiver module directly is connected with the array element of antenna for base station.Its advantage is: one) use the small-power power amplifier to replace the high-power power amplifier of former transceiver module design in the multichannel transceiver module, power amplification efficiency can significantly be provided, reduce power consumption and hardware cost; The second, because global design has reduced the power capacity requirement,, save traditional CD-ROM drive motor and control corresponding device so can adopt electric controllable phase shifter; Three) save cost height between antenna for base station and base station equipment, the thick coaxial cable of difficulty is installed, lead convenience for the construction, addressing etc. of base station, reduced cost, compact conformation, and improved receiving sensitivity.
Leave the joint of physical interface circuit on the housing of above-mentioned described antenna, so that physical interface circuit is connected simple installation with base band shared cell BBU by optical fiber.
Above-mentioned described physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module are to be integrated in a housing the inside, form the RRU equipment of one.Volume is little, and compact conformation is easy for installation.
Above-mentioned described transceiver module includes low noise amplifier, utilizes low noise amplifier to be right after the low noise that carries out upward signal behind the bay and amplifies out, thereby reduce system noise factor, improves uplink performance.
Above-mentioned described transceiver module comprises duplexer filter and power amplifier, the downlink signal is amplified before the duplexer filter that connects one or one group bay, can reduce the significantly power output of each power amplifier, thus the cost that improves power amplification efficiency and reduce power amplifier module.
Above-mentioned described synthesizing/distribution network connects the controllable phase shifter and the transceiver module assembled unit of multichannel, and the combination of every road controllable phase shifter and transceiver module directly is connected with one or one group of bay.Use the small-power power amplifier in the transceiver module, power amplification efficiency can significantly be provided, reduce power consumption and hardware cost.
(4) description of drawings:
Below in conjunction with accompanying drawing the present invention is done detailed explanation:
Fig. 1 is the scheme of installation of base station equipment and antenna feeder parts assembled scheme in the legacy communications system;
Fig. 2 is the scheme of installation that adopts radio frequency remote technology scheme in the existing communication system;
Fig. 3 is the circuit block diagram of Fig. 2 correspondence;
Fig. 4 is the circuit block diagram of first embodiment of radio frequency remote equipment of the present invention;
Fig. 5 is the structural representation of transceiver module of the present invention;
Fig. 6 is the circuit block diagram of second embodiment of radio frequency remote equipment of the present invention.
(5) embodiment:
Embodiment 1: as Fig. 3, Fig. 4, shown in Figure 5, the radio frequency remote equipment RRU of electrical tilt antenna of the present invention comprises physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, downstream signal passes through physical interface circuit successively, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, upward signal pass through transceiver module successively, controllable phase shifter, synthetic/distribution network, frequency changer circuit, A/D and D/A change-over circuit, processing circuitry of intermediate frequency and physical interface circuit.Physical interface circuit is connected by optical fiber with the base band shared cell BBU of base station, and transceiver module directly is connected with bay.Synthetic/distribution network connects the controllable phase shifter and the transceiver module assembled unit of multichannel, and the combination of every road controllable phase shifter and transceiver module is connected with one or one group of bay independently.Transceiver module includes low noise amplifier, utilizes low noise amplifier to be right after the low noise that carries out upward signal behind the bay and amplifies out, thereby reduce system noise factor, improves uplink performance.Transceiver module comprises duplexer filter and power amplifier, the downlink signal is carried out power amplification before the duplexer filter of each or every group of bay, can significantly reduce the power output of each power amplifier, thus the cost that improves power amplification efficiency and reduce power amplifier module.Physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module are to be integrated in a housing the inside, form the RRU equipment of one, and volume is little, and compact conformation is easy for installation.The electrical tilt antenna of a kind of integrated RF remote device of the present invention comprises radio frequency remote equipment RRU and antenna element, and radio frequency remote equipment RRU is directly installed on the antenna the inside.Leave the joint of physical interface circuit on the housing of antenna, so that physical interface circuit is connected by optical fiber with base band shared cell BBU.
Regulate on the radio frequency path that the needed controllable phase shifter of angle of declination is placed on corresponding reception emission respectively, the control command by signal path realizes controllable phase shifter control, then to the phase control of each array element, and then realizes the electric adjustable of angle of declination.For data feedback channel, the receiving RF channel that signal independently is made up of transceiver module and controllable phase shifter by multichannel, synthetic/distribution network the inside before frequency changer circuit is made down-conversion is combined into one tunnel radiofrequency signal, carry out follow-up down-conversion and A/D conversion again, thereby save the port number of follow-up link.For down going channel, one tunnel intermediate-freuqncy signal is divided into independently radiofrequency signal of multichannel by synthetic/distribution network after up-converting to radiofrequency signal through frequency changer circuit, and by independently transceiver module and duplexer filter are fed to corresponding antenna arrays unit.
The invention provides a kind of radio frequency remote equipment of electrical tilt antenna, can save radio frequency cable, save high-power power amplifier, save motor, complicated control appliance and transmission mechanism.Base station indoor base band shared cell BBU links to each other with interface circuit by optical fiber, and I/O all is digital i/q signal; This equipment adopts distributed transceiver module design, and each or every group of bay are linked to each other with one road transceiver module, and multichannel transceiver module the inside small-power power amplifier has replaced traditional high power amplifier; In receiving-transmitting chain, insert electric controllable phase shifter,, for example can call the phase place that one group of phase data that presets is in advance controlled each road, thereby realize the electric adjustable of angle of declination by the signal of telecommunication.
At down direction: carry out Data Format Transform through interface circuit and processing circuitry of intermediate frequency is handled from the I/Q data of base station indoor base band shared cell BBU, be converted to analog intermediate frequency signal through A/D and D/A change-over circuit again, up-convert to radiofrequency signal through frequency changer circuit again, radiofrequency signal is demultiplexing under synthetic/distribution network effect, every road signal changes phase place through controllable phase shifter, low-power amplifier by the transceiver module the inside is amplified to the power level that system needs, and radiate through bay.The angle of declination of final radiation direction will be changed by controllable phase shifter.
At up direction: the radiofrequency signal that each bay receives is through the low noise amplifier of transceiver module the inside, again phase shifting parameter is set at controllable phase shifter with uplink synchronous, synthesize one the tunnel at synthetic/distribution network, this radiofrequency signal down-converts to analog intermediate frequency signal through frequency changer circuit again, be converted to digital intermediate frequency signal through A/D and D/A change-over circuit again, carrying out Data Format Transform through processing circuitry of intermediate frequency and interface circuit again is i/q signal.Arrive base station indoor base band shared cell BBU through Optical Fiber Transmission.
The present invention also comprises the complementary circuit of clock circuit and power circuit and other, all has mature technique and realizes, here no longer narration.
Embodiment 2: as shown in Figure 6, compare with embodiment 1, controllable phase shifter and transceiver module position are exchanged among the embodiment 2, and this moment, transceiver channel can a shared phase shifter, not only save hardware cost, and need not the Synchronization Control of the controllable phase shifter of uplink and downlink radio-frequency channel.But relative embodiment 1 has the following disadvantages simultaneously:
1, to up link, because controllable phase shifter is to be positioned at before the low noise amplifier, embodiment 1 can reduce up receiving sensitivity slightly relatively;
2,,,, bring certain limitation for the type selecting of controllable phase shifter so strengthened the power capacity requirement of controllable phase shifter because controllable phase shifter is positioned at after the power amplifier to down link.
The design of embodiment 2 remainders repeats no more here with embodiment 1.
Claims (14)
1. the radio frequency remote equipment of an electrical tilt antenna, it is characterized in that: comprise physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, downstream signal passes through physical interface circuit successively, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, upward signal pass through transceiver module successively, controllable phase shifter, synthetic/distribution network, frequency changer circuit, A/D and D/A change-over circuit, processing circuitry of intermediate frequency and physical interface circuit.
2. the radio frequency remote equipment of a kind of electrical tilt antenna according to claim 1, it is characterized in that: physical interface circuit is connected by optical fiber with the base band shared cell BBU of base station, and transceiver module directly is connected with antenna for base station array element.
3. the radio frequency remote equipment of a kind of electrical tilt antenna according to claim 1 and 2, it is characterized in that: the controllable phase shifter next-door neighbour radio-frequency (RF) receiving and transmission module of control electric melody aerial lower inclination angle, synthetic/distribution network connects the controllable phase shifter and the transceiver module assembled unit of multichannel, and the phase shifter that every road is controlled and the assembled unit of transceiver module are connected with one or one group of bay separately.
4. the radio frequency remote equipment of a kind of electrical tilt antenna according to claim 3, it is characterized in that: transceiver module includes low noise amplifier, utilizing low noise amplifier to be right after the low noise that carries out upward signal behind the bay amplifies out, thereby the reduction system noise factor improves uplink performance.
5. the radio frequency remote equipment of a kind of electrical tilt antenna according to claim 4, it is characterized in that: transceiver module comprises duplexer filter and power amplifier, the downlink signal is amplified before connecting the duplexer filter of each or every group of bay, can reduce the significantly power output of each power amplifier, thus the cost that improves power amplification efficiency and reduce power amplifier module.
6. the radio frequency remote equipment of a kind of electrical tilt antenna according to claim 1, it is characterized in that: physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module are to be integrated in a housing the inside, form the RRU equipment of one.
7. the radio frequency remote equipment of an electrical tilt antenna, it is characterized in that: comprise physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, transceiver module and controllable phase shifter, downstream signal passes through physical interface circuit successively, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, transceiver module and controllable phase shifter, upward signal are passed through controllable phase shifter successively, transceiver module, synthetic/distribution network, frequency changer circuit, A/D and D/A change-over circuit, processing circuitry of intermediate frequency and physical interface circuit.
8. the electrical tilt antenna of an integrated RF remote device comprises radio frequency remote equipment RRU and antenna element, it is characterized in that: all or part of function of radio frequency remote equipment RRU is integrated into the electrical tilt antenna the inside.
9. the electrical tilt antenna of a kind of integrated RF remote device according to claim 8, it is characterized in that: described radio frequency remote equipment RRU comprises physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, downstream signal passes through physical interface circuit successively, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module, upward signal passes through transceiver module successively, controllable phase shifter, synthetic/distribution network, frequency changer circuit, A/D and D/A change-over circuit, processing circuitry of intermediate frequency and physical interface circuit, transceiver module directly is connected with bay.
10. the electrical tilt antenna of a kind of integrated RF remote device according to claim 9 is characterized in that: leave the joint of physical interface circuit on the housing of antenna, so that physical interface circuit is connected by optical fiber with base band shared cell BBU.
11. electrical tilt antenna according to claim 9 or 10 described a kind of integrated RF remote devices, it is characterized in that: physical interface circuit, processing circuitry of intermediate frequency, A/D and D/A change-over circuit, frequency changer circuit, synthetic/distribution network, controllable phase shifter and transceiver module are to be integrated in a housing the inside, form the RRU equipment with the antenna one.
12. the electrical tilt antenna of a kind of integrated RF remote device according to claim 11, it is characterized in that: described transceiver module includes low noise amplifier, utilizing low noise amplifier to be right after the low noise that carries out upward signal behind the antenna amplifies out, thereby the reduction system noise factor improves uplink performance.
13. the electrical tilt antenna of a kind of integrated RF remote device according to claim 12, it is characterized in that: transceiver module comprises duplexer filter, downlink signal signalization amplifier before the duplexer filter of each or every group of bay is amplified, can reduce the significantly power output of each power amplifier, thus the cost that improves power amplification efficiency and reduce power amplifier module.
14. the electrical tilt antenna of a kind of integrated RF remote device according to claim 12, it is characterized in that: the controllable phase shifter next-door neighbour radio-frequency (RF) receiving and transmission module of control electric melody aerial lower inclination angle, synthetic/distribution network connects the controllable phase shifter and the transceiver module assembled unit of multichannel, and every road controllable phase shifter is connected with one or one group of bay separately with the transceiver module unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810219967A CN101710841A (en) | 2008-12-09 | 2008-12-09 | Radio remote unit of electrically adjustable antenna and electrically adjustable antenna integrating radio remote unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810219967A CN101710841A (en) | 2008-12-09 | 2008-12-09 | Radio remote unit of electrically adjustable antenna and electrically adjustable antenna integrating radio remote unit |
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| CN101710841A true CN101710841A (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810219967A Pending CN101710841A (en) | 2008-12-09 | 2008-12-09 | Radio remote unit of electrically adjustable antenna and electrically adjustable antenna integrating radio remote unit |
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Cited By (7)
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| CN102647739A (en) * | 2011-02-18 | 2012-08-22 | 鼎桥通信技术有限公司 | Radio remote unit |
| CN102752250A (en) * | 2011-04-19 | 2012-10-24 | 鼎桥通信技术有限公司 | Intermediate frequency processing method and device for uplink and downlink, and radio remote unit (RRU) |
| CN103490178A (en) * | 2013-10-07 | 2014-01-01 | 西安电子科技大学 | Single-channel array receiving antenna based on two-phase code modulation |
| CN103546412A (en) * | 2012-07-11 | 2014-01-29 | 华为技术有限公司 | Data transmission method and data transmission system |
| CN103561249A (en) * | 2013-11-21 | 2014-02-05 | 国家电网公司 | Monitoring system of electric power capital construction field |
| CN103607235A (en) * | 2013-08-27 | 2014-02-26 | 京信通信技术(广州)有限公司 | Antenna feed system access device and antenna feed system |
| CN113453189A (en) * | 2020-03-25 | 2021-09-28 | 中国移动通信有限公司研究院 | Subway antenna system, antenna control method, network side equipment and terminal |
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| CN201323660Y (en) * | 2008-12-09 | 2009-10-07 | 广东通宇通讯设备有限公司 | Remote radio frequency unit of electric regulating antenna and electric regulating antenna integrating the remote radio frequency unit |
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| CN201001113Y (en) * | 2006-12-21 | 2008-01-02 | 华为技术有限公司 | Connection component and RF device integrated using the same |
| CN101232123A (en) * | 2008-01-15 | 2008-07-30 | 中兴通讯股份有限公司 | Electric melody aerial lower inclination angle long-range control system |
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| CN102647739A (en) * | 2011-02-18 | 2012-08-22 | 鼎桥通信技术有限公司 | Radio remote unit |
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| CN102752250A (en) * | 2011-04-19 | 2012-10-24 | 鼎桥通信技术有限公司 | Intermediate frequency processing method and device for uplink and downlink, and radio remote unit (RRU) |
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| CN103607235A (en) * | 2013-08-27 | 2014-02-26 | 京信通信技术(广州)有限公司 | Antenna feed system access device and antenna feed system |
| CN103490178A (en) * | 2013-10-07 | 2014-01-01 | 西安电子科技大学 | Single-channel array receiving antenna based on two-phase code modulation |
| CN103490178B (en) * | 2013-10-07 | 2016-03-02 | 西安电子科技大学 | Based on the single channel array received antenna of phase Code modulation |
| CN103561249A (en) * | 2013-11-21 | 2014-02-05 | 国家电网公司 | Monitoring system of electric power capital construction field |
| CN113453189A (en) * | 2020-03-25 | 2021-09-28 | 中国移动通信有限公司研究院 | Subway antenna system, antenna control method, network side equipment and terminal |
| CN113453189B (en) * | 2020-03-25 | 2023-09-05 | 中国移动通信有限公司研究院 | Subway antenna system, antenna control method, network side equipment and terminal |
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Application publication date: 20100519 |