CN102036257A - Digital frequency shift companding system - Google Patents
Digital frequency shift companding system Download PDFInfo
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- CN102036257A CN102036257A CN2010106153750A CN201010615375A CN102036257A CN 102036257 A CN102036257 A CN 102036257A CN 2010106153750 A CN2010106153750 A CN 2010106153750A CN 201010615375 A CN201010615375 A CN 201010615375A CN 102036257 A CN102036257 A CN 102036257A
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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
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Abstract
The invention discloses a digital frequency shift companding system, which comprises a local machine, a remote machine and an operation maintenance center, wherein the local machine is connected with a base station through a coupler; the local machine and the remote machine are connected with relay antennae and are connected with each other through transmission signals of the relay antennae; the remote machine is also connected with a retransmission antenna; and the local machine and the remote machine are connected with the operation maintenance center. The problems of signal coverage of complex terrains such as remote and mountain areas, hilly grounds, deserts, grasslands, large rivers, railway lines, forests and the like as well as coverage areas with tense urban frequency resources are solved effectively; a high-efficiency compact design is adopted, so that integration degree and overall efficiency are improved in a certain degree and size is further reduced; power capability is enhanced; simultaneously, cost is lowered and reliability is enhanced.
Description
Technical field
The present invention relates to the companding system in a kind of wireless communication networks, specifically be meant a kind of digital shift frequency companding system.
Background technology
The demand of outlying district mobile communication improves day by day, because these areas are subjected to geography, the restriction of economic condition, communication conditions is relatively poor, carry out networking if adopt original repeater mode or general shift frequency mode, it is too high to exist the initial investment cost, cause the investment withdrawal time longer, even nonrecoverable situation, and remote districts are far away apart from cities and towns, do not receive base station signal from cities and towns at all, if adopt base station primary frequency signal, then be subject to the external environment influence, the radio propagation path loss is bigger, and ground, mountain area type complexity, signal is blocked easily.
Summary of the invention
The object of the present invention is to provide a kind of digital shift frequency companding system, problem poor in order to solve, communication frequency resource anxiety in outlying mountain area's communication conditions.
Purpose of the present invention is achieved through the following technical solutions:
A kind of digital shift frequency companding of the present invention system, comprise by coupler be connected with the base station near-end machine, remote termination and operation maintenance center, all be connected with the relaying antenna on described near-end machine and the remote termination, the near-end machine is connected by the relaying antenna transmission signal on it with remote termination, also be connected with retransmitting antenna on described remote termination, near-end machine, remote termination are connected with operation maintenance center respectively.
Described near-end machine comprises the 1st radio frequency duplex unit that connects successively, the 1st power amplifier LNA unit, the 1st transceiver radio frequency unit, the 1st digital intermediate frequency unit, the 1st digital processing element, the 2nd digital intermediate frequency unit, the 2nd transceiver radio frequency unit, the 2nd power amplifier LNA unit, the 2nd radio frequency duplex unit, also comprise the 1st clock unit, the 1st control unit, the 1st power subsystem, the 1st lightning protection unit, the 1st monitoring unit, described the 1st clock unit, the 1st control unit, the 1st power subsystem, the 1st lightning protection unit, the 1st monitoring unit all by bus respectively with the 1st radio frequency duplex unit, the 1st power amplifier LNA unit, the 1st transceiver radio frequency unit, the 1st digital intermediate frequency unit, the 1st digital processing element, the 2nd digital intermediate frequency unit, the 2nd transceiver radio frequency unit, the 2nd power amplifier LNA unit, the 2nd radio frequency duplex unit connects.The 1st clock unit provides clock for the 1st digital intermediate frequency unit, the 1st digital processing element, and the radio-frequency (RF) local oscillator reference clock signal is provided for the 1st transceiver radio frequency unit; The 1st control unit is realized failure diagnosis, test, the debugging to near-end machine system, monitors and finish the monitoring control of communicating by letter with remote termination; The 1st power subsystem is by conversion, for each unit in the near-end machine provides required working power, in order to guarantee the steady operation of each unit; The 1st lightning protection unit is the reliability of the outdoor utility that guarantees the near-end machine, adopts different power supplys according to the difference of applied environment: configuration AC power lightning-protection module when adopting AC power supply module; Configuring direct current power lightning protection module when adopting DC power supplier; The 1st monitoring unit is finished the monitoring of Surveillance center to the configuration of each unit of near-end machine inside and operating state, power supply status, working state of system, alarm project etc., and the remote monitoring that the near-end machine is communicated by letter with remote termination.
Described remote termination comprises the 3rd radio frequency duplex unit that connects successively, the 3rd power amplifier LNA unit, the 3rd transceiver radio frequency unit, the 3rd digital intermediate frequency unit, the 2nd digital processing element, the 4th digital intermediate frequency unit, the 4th transceiver radio frequency unit, the 4th power amplifier LNA unit, the 4th radio frequency duplex unit, also comprise the 2nd clock unit, the 2nd control unit, the 2nd power subsystem, the 2nd lightning protection unit, the 2nd monitoring unit, described the 2nd clock unit, the 2nd control unit, the 2nd power subsystem, the 2nd lightning protection unit, the 2nd monitoring unit all by bus respectively with the 3rd radio frequency duplex unit, the 3rd power amplifier LNA unit, the 3rd transceiver radio frequency unit, the 3rd digital intermediate frequency unit, the 2nd digital processing element, the 4th digital intermediate frequency unit, the 4th transceiver radio frequency unit, the 4th power amplifier LNA unit, the 4th radio frequency duplex unit connects.The 2nd clock unit, the 2nd control unit, the 2nd power subsystem, the 2nd lightning protection unit, the 2nd monitoring unit are identical to setting, operation principle, effect and the purposes of inner each component unit of near-end machine to setting, operation principle, effect and the purposes of each component unit of remote termination inside and the 1st clock unit, the 1st control unit, the 1st power subsystem, the 1st lightning protection unit, the 1st monitoring unit.
Described relaying antenna is a Yagi antenna.
Described retransmitting antenna is a plate antenna.
Adopt the relaying antenna of the Yagi antenna of suitable outside work as native system, adopt the retransmitting antenna of plate antenna as native system, its adaptive capacity is good, and cheap, be easy to install.
Described operation maintenance center comprises the control terminal machine that has utilization Operation and Maintenance agreement and carry out oam and remote monitoring.
Described near-end machine is one, and remote termination is N, N 〉=1 and be natural number.Cooperate a plurality of remote terminations to realize the network coverage by a near-end machine, reduced the input of building a station.
Operation principle is as follows:
Numeral shift frequency companding system is that a kind of shift frequency zooms out direct discharging station, be a kind of wireless network radiofrequency signal shift frequency to the low frequency frequency range, utilize the more excellent radio transmission performance of low-frequency range to carry out the direct discharging station of relay transmission.
Down direction: the near-end machine of digital shift frequency companding system is by the be coupled downlink radiofrequency signal of base station of wired coupling or wireless coupling mode, frequency conversion becomes the relaying frequency signal, simultaneously will be distributed in the traffic carrier that is operated in the network frequency range and be compressed in the relaying frequency range, by being transmitted to remote termination by the relaying antenna behind the high linear amplification of high efficiency high power according to network configuration; After remote termination relaying antenna receives this repeating signal and amplifies by low noise, repeating signal is reverted to the base station down radiofrequency signal of former network frequency range, the traffic carrier expansion that realizes the relaying frequency range simultaneously reverts to network frequency range traffic carrier, behind the high linear amplification of high efficiency high power, launch the realization network coverage by retransmitting antenna.
Up direction: the remote termination of digital shift frequency companding system passes through retransmitting antenna, reception is from the radiofrequency signal of travelling carriage, amplify back network signal frequency conversion by low noise and become the relaying frequency signal, simultaneously will be distributed in the traffic carrier that is operated in the network frequency range and be compressed in the relaying frequency range, by being transmitted to the near-end machine by the relaying antenna behind the high linear amplification of high efficiency high power according to network configuration; After near-end machine relaying antenna receives this repeating signal and amplifies by low noise, repeating signal is reverted to the uplink service radiofrequency signal of former network frequency range, the traffic carrier expansion that realizes the relaying frequency range simultaneously reverts to network frequency range traffic carrier, behind the linear amplification, be coupled to antenna for base station by wired coupling or wireless coupling mode.
The present invention compared with prior art has following advantage and beneficial effect:
A kind of digital shift frequency companding of 1 the present invention system effectively solves the signal covering problem of complex-terrains such as outlying mountain area, knob, desert, grassland, great rivers, railway are along the line, forest, and effectively solves the comparatively nervous area of coverage of city frequency resource;
A kind of digital shift frequency companding of 2 the present invention system adopts the high efficiency compact design, has improved integrated level and overall efficiency to a certain extent, further reduces volume;
A kind of digital shift frequency companding of 3 the present invention system increases power capability, has also reduced cost simultaneously, has increased reliability.
Description of drawings
Fig. 1 is a connection diagram of the present invention;
Fig. 2 is a near-end machine schematic internal view of the present invention;
Fig. 3 is a remote termination schematic internal view of the present invention;
Fig. 4 is a working signal flow chart of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with embodiment, but embodiments of the present invention are not limited thereto.
Embodiment one
Shown in Fig. 1 to 4, the present invention includes the near-end machine, remote termination and the operation maintenance center that are connected with the base station by coupler, all be connected with the relaying antenna on near-end machine and remote termination, also be connected with retransmitting antenna on remote termination, near-end machine, remote termination are connected with operation maintenance center respectively.
The near-end machine comprises that the 1st clock unit, the 1st control unit, the 1st power subsystem, the 1st lightning protection unit, the 1st monitoring unit all link to each other with the 1st radio frequency duplex unit that is connected successively, the 1st power amplifier LNA unit, the 1st transceiver radio frequency unit, the 1st digital intermediate frequency unit, the 1st digital processing element, the 2nd digital intermediate frequency unit, the 2nd transceiver radio frequency unit, the 2nd power amplifier LNA unit, the 2nd radio frequency duplex unit respectively by bus;
Relaying antenna: be arranged on the Yagi antenna between near-end machine and the remote termination.
Remote termination: the 2nd clock unit, the 2nd control unit, the 2nd power subsystem, the 2nd lightning protection unit, the 2nd monitoring unit all are connected with the 3rd radio frequency duplex unit, the 3rd power amplifier LNA unit, the 3rd transceiver radio frequency unit, the 3rd digital intermediate frequency unit, the 2nd digital processing element, the 4th digital intermediate frequency unit, the 4th transceiver radio frequency unit, the 4th power amplifier LNA unit, the 4th radio frequency duplex unit respectively by bus
Retransmitting antenna: adopt plate antenna.
Operation maintenance center: far-end control operation monitor terminal PC with ICP/IP protocol.
For the selection of each component unit in the native system, should carry out according to following requirement:
Radio frequency duplex unit, link to each other with power amplifier LNA unit, base station radio-frequency duplex unit with retransmitting antenna transmit and receive signal or base station to transmit and receive signal isolated, another relaying radio frequency duplex unit will be isolated with the repeating signal that transmits and receives that the relaying antenna interconnecting piece is divided, and guarantee reception and emission operate as normal simultaneously.Radio frequency duplex unit is made up of the stop-band filter of two groups of different frequencies, avoids transmitting being transferred to receiver; Filter section is divided into cavity body filter simultaneously, satisfies the index request of the outer part of band of transmit scattering and intermodulation decay, and emission can reach-85 dB to the inhibition ability that receives, and Insertion Loss in the band 〉-2dB, its module is according to suppressing index and isolate index, customization voluntarily.
The descending power that power amplifier LNA unit is finished repeating signal and base station signal amplifies and up processing and amplifying, and guarantees that upstream noise is enough little.On/downlink radio frequency I/O end and radio frequency duplex unit is connected, on/downlink radio frequency output/input links to each other with the transceiver radio frequency unit.This module power amplifier is partly realized by the Doherty power amplifier, the main suitable gain amplifier and the amplifier of noise factor selected of LNA part.
The transceiver radio frequency unit is finished the amplification to repeating signal and base station signal analog radio frequency, filtering, and Frequency mixing processing.
The analog radio-frequency signal that digital intermediate frequency unit, digital processing element are finished the transceiver radio frequency unit carries out ADC, after the DAC conversion, carries out digital signal, and digital medium-frequency signal is handled.
Clock unit guarantees the rf frequency stability demand of system, selected the high stable 10M crystal oscillator of voltage-controlled end for use, when operate as normal, IF_FPGA extracts the deviation of veneer clock and base station clock from carrier signal, by control 10M crystal oscillator behind the DAC of 14 of a slices, keep relative consistent with clock and the base station clock that guarantees system; The output of high stable crystal oscillator 10M give LMK03000C as reference signal, the PLL of LMK03000C locks onto on the 1290.24M, divide in the digital intermediate frequency unit that occurs frequently ADC sampling clock, DAC sampling clock in the IF FPGA clock and digital processing element then, and the required clock signal of radio-frequency (RF) local oscillator.
Control unit is realized failure diagnosis, test, the debugging to near-end machine system, monitoring, and finish the monitoring control of communicating by letter with remote termination.
Power subsystem is finished the power supply to the near-end machine, and is relevant according to application scenarios, the AC power supply module of near-end machine selection of A C 220V Alternating Current Power Supply, or the DC power supplier of DC-48V direct current supply.Convert AC 220V alternating voltage or DC-48V direct voltage to two groups+28V direct voltage at the inner AC/DC power module that adopts of near-end machine.+ 28V voltage one tunnel uses for the power amplifier LNA, and other one the tunnel gives the transceiver radio frequency unit.On the transceiver radio frequency unit, by the buck power-switching circuit, general+28V voltage transitions is the 5V dc bus voltage, other various low-voltages of using on the transceiver radio frequency unit comprise+5V simultaneously, + 3.3V, + 2.5V ,+1V etc. also adopt on the plate power supply from the+enterprising line translation of 5V voltage, adopt devices such as buck power-switching circuit and LDO to finish.Power supply is selected and can be customized according to following index: power supply: AC 220V or DC-48V, average power consumption is less than 100W
AC 220V power requirement: operating voltage range: 110 ~ 300V
Anti-voltage range: the 70 ~ 320V that ruins
DC-48V power requirement: operating voltage range :-60 ~ 36V
The anti-voltage range of ruining :-72 ~-24V.
Lightning protection unit according to the difference of applied environment, disposes the AC power lightning-protection module for the reliability of the outdoor utility of assurance near-end machine when adopting AC power supply module; Configuring direct current power lightning protection module when adopting DC power supplier.And relaying duplexer/filter unit configuration antenna feeder lightning-protection module; When supporting AC 220V Alternating Current Power Supply, input current is no more than 4A.AC power modular converter inside carries the input lightning protection of 5KA, in the area that requires high lightning protection grade, can take to dispose the internal communication lightning-protection module and realize; During support-48V direct current supply, input current is no more than 7A.Need the inner direct current stream of configuration lightning-protection module to realize the lightning protection demand.And requirement can be satisfied GB/T 17626.5-99 " EMC test and measuring technique surge (impact) immunity experiment " requirement.Signal section can bear current surge 3KA ± 10% of 8/20 μ s; Power unit can bear the current surge of 8/20 μ s.
Monitoring unit, is realized finishing configuration, power supply status, the system mode of Surveillance center to the near-end machine, the monitoring of alarm based on the control link of note by monitoring module based on the monitoring protocol requirement; The near-end machine is to the monitoring of remote termination, and by disposing a channel in the relaying frequency separately, as monitoring and controlling channels, the monitoring remote termination is communicated by letter with the near-end machine.
The relaying antenna: adopt general Yagi antenna, its type selecting is considered working frequency range, gain, polarization mode, maximal input, size, weight, material and mounting means, installs with actual field and uses its concrete model of decision.
Retransmitting antenna: plate antenna, its type selecting is considered working frequency range, gain, polarization mode, maximal input, size, weight, material, mounting means, operating ambient temperature, rated wind speed, anti-rainfall are installed its concrete model of application decision with actual field.
As mentioned above, just can realize the present invention well.
Claims (7)
1. digital shift frequency companding system, it is characterized in that: comprise the near-end machine, remote termination and the operation maintenance center that are connected with the base station by coupler, all be connected with the relaying antenna on described near-end machine and the remote termination, the near-end machine is connected by the relaying antenna transmission signal on it with remote termination, also be connected with retransmitting antenna on described remote termination, near-end machine, remote termination are connected with operation maintenance center respectively.
2. a kind of digital shift frequency companding according to claim 1 system, it is characterized in that: described near-end machine comprises the 1st radio frequency duplex unit that connects successively, the 1st power amplifier LNA unit, the 1st transceiver radio frequency unit, the 1st digital intermediate frequency unit, the 1st digital processing element, the 2nd digital intermediate frequency unit, the 2nd transceiver radio frequency unit, the 2nd power amplifier LNA unit, the 2nd radio frequency duplex unit, also comprise the 1st clock unit, the 1st control unit, the 1st power subsystem, the 1st lightning protection unit, the 1st monitoring unit, described the 1st clock unit, the 1st control unit, the 1st power subsystem, the 1st lightning protection unit, the 1st monitoring unit all by bus respectively with the 1st radio frequency duplex unit, the 1st power amplifier LNA unit, the 1st transceiver radio frequency unit, the 1st digital intermediate frequency unit, the 1st digital processing element, the 2nd digital intermediate frequency unit, the 2nd transceiver radio frequency unit, the 2nd power amplifier LNA unit, the 2nd radio frequency duplex unit connects.
3. a kind of digital shift frequency companding according to claim 1 system, it is characterized in that: described remote termination comprises the 3rd radio frequency duplex unit that connects successively, the 3rd power amplifier LNA unit, the 3rd transceiver radio frequency unit, the 3rd digital intermediate frequency unit, the 2nd digital processing element, the 4th digital intermediate frequency unit, the 4th transceiver radio frequency unit, the 4th power amplifier LNA unit, the 4th radio frequency duplex unit, also comprise the 2nd clock unit, the 2nd control unit, the 2nd power subsystem, the 2nd lightning protection unit, the 2nd monitoring unit, described the 2nd clock unit, the 2nd control unit, the 2nd power subsystem, the 2nd lightning protection unit, the 2nd monitoring unit all by bus respectively with the 3rd radio frequency duplex unit, the 3rd power amplifier LNA unit, the 3rd transceiver radio frequency unit, the 3rd digital intermediate frequency unit, the 2nd digital processing element, the 4th digital intermediate frequency unit, the 4th transceiver radio frequency unit, the 4th power amplifier LNA unit, the 4th radio frequency duplex unit connects.
4. a kind of digital shift frequency companding according to claim 1 system, it is characterized in that: described relaying antenna is a Yagi antenna.
5. a kind of digital shift frequency companding according to claim 1 system, it is characterized in that: described retransmitting antenna is a plate antenna.
6. a kind of digital shift frequency companding according to claim 1 system, it is characterized in that: described operation maintenance center comprises the control terminal machine that has utilization Operation and Maintenance agreement and carry out oam and remote monitoring.
7. a kind of digital shift frequency companding according to claim 1 system, it is characterized in that: described near-end machine is one, remote termination is N, N 〉=1 and be natural number.
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| CN2010106153750A CN102036257A (en) | 2010-12-30 | 2010-12-30 | Digital frequency shift companding system |
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| CN2010106153750A CN102036257A (en) | 2010-12-30 | 2010-12-30 | Digital frequency shift companding system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102204402A (en) * | 2011-05-25 | 2011-09-28 | 华为技术有限公司 | Base station equipment and signal transmission method thereof |
| CN107864002A (en) * | 2017-12-20 | 2018-03-30 | 成都芯通软件有限公司 | A kind of repeater remote termination |
| CN108023634A (en) * | 2017-12-20 | 2018-05-11 | 成都芯通软件有限公司 | A kind of chain type cascades TD-LTE frequency-shift repeater station systems |
| WO2023087220A1 (en) * | 2021-11-18 | 2023-05-25 | 华为技术有限公司 | Microwave device and microwave communication site |
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| CN201904922U (en) * | 2010-12-30 | 2011-07-20 | 芯通科技（成都）有限公司 | Digital frequency shift companding system |
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| CN201174773Y (en) * | 2008-04-09 | 2008-12-31 | 厦门特力通信息技术有限公司 | Central monitored split type apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102204402A (en) * | 2011-05-25 | 2011-09-28 | 华为技术有限公司 | Base station equipment and signal transmission method thereof |
| WO2011144084A3 (en) * | 2011-05-25 | 2012-04-26 | 华为技术有限公司 | Base station device and signal transmission method thereof |
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| CN107864002A (en) * | 2017-12-20 | 2018-03-30 | 成都芯通软件有限公司 | A kind of repeater remote termination |
| CN108023634A (en) * | 2017-12-20 | 2018-05-11 | 成都芯通软件有限公司 | A kind of chain type cascades TD-LTE frequency-shift repeater station systems |
| WO2023087220A1 (en) * | 2021-11-18 | 2023-05-25 | 华为技术有限公司 | Microwave device and microwave communication site |
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Application publication date: 20110427 |