CN108023634A - A kind of chain type cascades TD-LTE frequency-shift repeater station systems - Google Patents
A kind of chain type cascades TD-LTE frequency-shift repeater station systems Download PDFInfo
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- CN108023634A CN108023634A CN201711386942.8A CN201711386942A CN108023634A CN 108023634 A CN108023634 A CN 108023634A CN 201711386942 A CN201711386942 A CN 201711386942A CN 108023634 A CN108023634 A CN 108023634A
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- 230000003321 amplification Effects 0.000 claims description 36
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 36
- 238000004891 communication Methods 0.000 claims description 30
- 230000008054 signal transmission Effects 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
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- 238000012545 processing Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2603—Arrangements for wireless physical layer control
- H04B7/2609—Arrangements for range control, e.g. by using remote antennas
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention discloses a kind of chain type to cascade TD LTE frequency-shift repeater station systems, it includes near-end machine, at least a remote termination and remote maintenance center, since remote termination has the ability of relaying relay and the network coverage at the same time, and using the group-network construction of chain type cascade.Therefore, the present invention according to specific application scenarios, can add the quantity of remote termination and zoom out distance to be lifted and expand network coverage, and, to the adaptable of geographical environment, the requirement to bus station position is reduced, so as to reduce difficulty of construction and save cost input.
Description
Technical Field
The invention relates to a frequency shift repeater system in a wireless communication network, in particular to a chain type cascade TD-LTE frequency shift repeater system.
Background
Due to the fact that the frequency of TD-LTE is high, the diffraction capability of signals is poor, and a large amount of weak coverage and blind areas are caused. In order to meet the communication requirements of users with weak coverage and blind areas, the traditional repeater equipment has the problems of difficult site selection and limited coverage range, and the mode of constructing the base station has the problems of large investment, low return, long construction period and the like.
Disclosure of Invention
The invention aims to: the chain type cascade TD-LTE digital frequency shift repeater system is provided to solve the problem that a blind area exists in the weak coverage of TD-LTE.
In order to achieve the above purpose, the invention provides the following technical scheme:
a chain cascade TD-LTE frequency shift repeater system comprises a near-end machine, at least one far-end machine and a remote maintenance center, wherein the near-end machine is provided with a first transceiving port and a second transceiving port, and the far-end machine is provided with a first transceiving port, a second transceiving port and a third transceiving port; wherein,
the first transceiving port of the near-end machine is in communication signal coupling with a base station, the second transceiving port of the near-end machine and the second transceiving port of the remote machine adjacent to the near-end machine perform signal transmission through a relay antenna, the first transceiving port of each remote machine is connected with a retransmission antenna to complete signal coverage, and the second transceiving port of the remote machine adjacent to the remote machine perform signal transmission through the relay antenna, or the third transceiving port of the remote machine and the third transceiving port of the remote machine adjacent to the remote machine perform signal transmission through the relay antenna;
the near-end machine and each far-end machine are respectively communicated with the remote maintenance center through signals covered by the local area, upload respective working state data to the remote maintenance center and receive control data of the remote maintenance center.
According to a specific implementation mode, in the chain-cascaded TD-LTE frequency shift repeater system of the present invention, the near-end unit includes a first cavity filter, a first power amplifier low noise amplifier unit, a first transceiver radio frequency unit, a first digital intermediate frequency unit, a second transceiver radio frequency unit, a second power amplifier low noise amplifier unit, and a second cavity filter, which are connected in sequence.
Furthermore, the near-end machine also comprises a time slot synchronization unit, a control unit, a clock unit and a communication unit; the control unit is respectively connected with the first power amplifier low-noise amplification unit, the first transceiver radio frequency unit, the first digital intermediate frequency unit, the second transceiver radio frequency unit, the second power amplifier low-noise amplification unit, the time slot synchronization unit, the clock unit and the communication unit through a bus, and uploads the working state data of each unit to the remote maintenance center through the communication unit, and receives the control data of the remote maintenance center through the communication unit.
According to a specific implementation mode, in the chain-cascaded TD-LTE frequency shift repeater system of the present invention, the remote terminal includes a first cavity filter, a first power amplifier low noise amplifier unit, a first transceiver radio frequency unit, a first digital intermediate frequency unit, a second transceiver radio frequency unit, a second power amplifier low noise amplifier unit, a second cavity filter, a third digital intermediate frequency unit, a third transceiver radio frequency unit, a third power amplifier low noise amplifier unit, and a third cavity filter, which are connected in sequence; wherein the first digital intermediate frequency unit is connected with the second digital intermediate frequency unit and the third digital intermediate frequency unit, respectively.
Furthermore, the remote machine also comprises a time slot synchronization unit, a control unit, a clock unit and a communication unit; the control unit is respectively connected with the first power amplification low-noise amplification unit, the first transceiving radio frequency unit, the first digital intermediate frequency unit, the second transceiving radio frequency unit, the second power amplification low-noise amplification unit, the third digital intermediate frequency unit, the third transceiving radio frequency unit, the third power amplification low-noise amplification unit, the time slot synchronization unit, the clock unit and the communication unit through a bus, and is used for uploading the working state data of each unit to the remote maintenance center through the communication unit and receiving the control data of the remote maintenance center through the communication unit.
According to a specific implementation mode, in the chain-type cascaded TD-LTE frequency shift repeater system, the relay antenna is a yagi antenna or a helical antenna, and the retransmission antenna is a plate antenna.
According to a specific implementation manner, in the chain type cascade TD-LTE frequency shift repeater system of the present invention, the second transceiving port and the third transceiving port use the same signal transmission frequency.
According to a specific implementation mode, in the chain type cascade TD-LTE frequency shift repeater system, the near-end machine and the far-end machine further comprise lightning protection modules.
Compared with the prior art, the invention has the beneficial effects that:
the chain type cascade TD-LTE frequency shift repeater system adopts the framework of the near-end machine and at least one far-end machine, and meanwhile, the far-end machine not only has the relay capacity, but also has the network coverage capacity. Therefore, the invention can increase the remote distance and expand the network coverage by adding the number of the remote machines according to the specific application scene, has strong adaptability to the geographic environment, and reduces the requirement on site selection, thereby reducing the construction difficulty and saving the cost investment.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a chain type cascade TD-LTE frequency shift repeater system according to the present invention;
fig. 2 is a schematic structural diagram of a near-end machine of the present invention;
fig. 3 is a schematic diagram of the structure of the remote machine of the present invention.
The labels in the figure are: 1-retransmission antenna, 2-relay antenna.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
The chain type cascade TD-LTE frequency shift repeater system comprises a near-end machine, at least one far-end machine and a remote maintenance center. The near-end machine is provided with a first transceiving port and a second transceiving port, and the far-end machine is provided with a first transceiving port, a second transceiving port and a third transceiving port.
The first transceiving port of the near-end machine is in communication signal coupling with the base station, the second transceiving port of the near-end machine and the second transceiving port of the far-end machine adjacent to the second transceiving port of the near-end machine are in signal transmission through the relay antenna, the first transceiving port of each far-end machine is connected with the retransmission antenna to complete signal coverage, the second transceiving port of the far-end machine and the second transceiving port of the far-end machine adjacent to the second transceiving port of the far-end machine are in signal transmission through the relay antenna, or the third transceiving port of the far-end machine and the third transceiving port of the far-end machine adjacent to the third transceiving port of the far-end machine are in signal.
And the near-end machine and each far-end machine are respectively communicated with the remote maintenance center through signals covered by the local area, and upload respective working state data to the remote maintenance center, and receive control data of the remote maintenance center, so that the invention can monitor the working states of the near-end machine and the far-end machine through the remote maintenance center, and can remotely control the near-end machine and the far-end machine.
With reference to fig. 1, a schematic structural diagram of an embodiment of the present invention is shown; wherein, the base station is connected with a retransmission antenna 1 and a first transceiving port of a near-end machine through a coupler respectively, a second transceiving port of the near-end machine is connected with a relay antenna 2, a second transceiving port of a far-end machine 1 adjacent to the near-end machine is connected with a relay antenna 2, the second transceiving port of the near-end machine and the second transceiving port of the far-end machine 1 carry out signal transmission through the relay antenna, the first transceiving port of the far-end machine 1 is connected with a retransmission antenna 1 to realize signal coverage, a third transceiving port of the far-end machine 1 is also connected with a relay antenna 2, a third transceiving port of the far-end machine 2 adjacent to the far-end machine 1 is connected with a relay antenna 2, the third port of the far-end machine 1 and the third transceiving port of the far-end machine 2 carry out signal transmission through the relay antenna, the first transceiving port of the far-end machine 2 is connected with a retransmission antenna 1 to realize signal coverage, and the second transceiving port of the remote machine 2 is also connected with one relay antenna 2 and can carry out signal transmission through the relay antenna with the second transceiving port of the remote machine adjacent to the second transceiving port.
Referring to fig. 2, the structure of the near-end machine of the present invention is schematically shown; the near-end machine comprises a first cavity filter, a first power amplifier low-noise amplifier unit, a first transceiving radio frequency unit, a first digital intermediate frequency unit, a second transceiving radio frequency unit, a second power amplifier low-noise amplifier unit and a second cavity filter which are sequentially connected.
Furthermore, the near-end machine also comprises a time slot synchronization unit, a control unit, a clock unit and a communication unit. The control unit is respectively connected with the first power amplifier low-noise amplification unit, the first transceiver radio frequency unit, the first digital intermediate frequency unit, the second transceiver radio frequency unit, the second power amplifier low-noise amplification unit, the time slot synchronization unit, the clock unit and the communication unit through a bus, and uploads the working state data of each unit to the remote maintenance center through the communication unit, and receives the control data of the remote maintenance center through the communication unit.
Referring to fig. 3, a schematic diagram of the remote unit of the present invention is shown; the remote machine comprises a first cavity filter, a first power amplification low-noise amplification unit, a first transceiving radio frequency unit, a first digital intermediate frequency unit, a second transceiving radio frequency unit, a second power amplification low-noise amplification unit, a second cavity filter, a third digital intermediate frequency unit, a third transceiving radio frequency unit, a third power amplification low-noise amplification unit and a third cavity filter, wherein the first cavity filter, the first power amplification low-noise amplification unit, the first digital intermediate frequency unit, the second transceiving radio frequency unit, the first digital intermediate frequency unit, the second transceiving radio frequency unit, the second cavity filter; wherein the first digital intermediate frequency unit is connected with the second digital intermediate frequency unit and the third digital intermediate frequency unit, respectively.
Furthermore, the remote machine also comprises a time slot synchronization unit, a control unit, a clock unit and a communication unit; the control unit is respectively connected with the first power amplification low-noise amplification unit, the first transceiving radio frequency unit, the first digital intermediate frequency unit, the second transceiving radio frequency unit, the second power amplification low-noise amplification unit, the third digital intermediate frequency unit, the third transceiving radio frequency unit, the third power amplification low-noise amplification unit, the time slot synchronization unit, the clock unit and the communication unit through a bus, and is used for uploading the working state data of each unit to the remote maintenance center through the communication unit and receiving the control data of the remote maintenance center through the communication unit.
A schematic structural view of a near-end machine and a far-end machine shown in a combined mode in fig. 2 and 3; the near-end machine and the far-end machine of the invention also comprise a lightning protection module, and the lightning protection module correspondingly selects a direct current lightning protection device or an alternating current lightning protection device according to the input of the power supply module as direct current or alternating current.
In the present invention, the relay antenna is a yagi antenna or a helical antenna, and the retransmission antenna is a plate antenna. In addition, in the chain type cascade TD-LTE frequency shift repeater system, the second transceiving port and the third transceiving port adopt the same signal transmission frequency, and can also adopt different signal transmission frequencies through the configuration of the control unit.
Meanwhile, the invention transforms the signals in the base station, the near-end machine and the far-end machine to a lower frequency band so as to realize the medium and long distance transmission of the signals and realize the communication signal coverage of a long distance. Because the remote machine has the capability of simultaneously amplifying the relay signal and the service signal, the service signal realizes network coverage through the plate-shaped antenna, and the relay signal is transmitted to the next-stage remote machine through the relay antenna for network coverage and relay amplification. The specific working principle is as follows:
the downlink direction is as follows: the near-end machine is coupled with a downlink transmission radio frequency signal of the TD-LTE base station through a coupler, is subjected to digital intermediate frequency processing and then is subjected to frequency conversion to a relay frequency band, is amplified by high linearity and high power and then is transmitted to the far-end machine 1 through a relay antenna, and meanwhile, the digital predistortion technology is used for improving the power amplification efficiency and the signal quality. After receiving the relay signal, the relay antenna of the remote terminal 1 amplifies the signal with low noise, and then processes the signal with digital intermediate frequency to recover network coverage and relay respectively. The recovery of network coverage is realized by converting the signal after digital intermediate frequency processing to the original network frequency band, amplifying the signal with high linearity and high power, and transmitting the amplified signal to a user area through a plate-shaped antenna. The relay is to frequency-convert the signal after the digital intermediate frequency processing to the relay frequency band, and send the signal to the remote terminal 2 through the relay antenna for network coverage and relay after high-linearity high-power amplification, and so on, thereby realizing the cascade networking of a plurality of remote terminals, improving the remote distance and realizing the network coverage of a plurality of user areas. The downlink channel is only started by the time slot synchronization unit in the downlink time slot, so that the interference to the normal work of the original network and the damage of the equipment are avoided.
An uplink direction: the terminal transmits uplink signals in an uplink time slot, each level of remote terminal receives the terminal uplink signals in the space through the plate-shaped antenna, the terminal uplink signals are subjected to digital intermediate frequency processing after being amplified by low noise, uplink signals of the terminal transmitted by the next level of remote terminal through the relay antenna are received at the same time, the two signals are combined and then are subjected to frequency conversion to be subjected to high-linearity high-power amplification with the frequency band of the previous level of remote terminal, and then the signals are transmitted through the relay antenna. And finally, the near-end machine receives all uplink signals transmitted by all the cascaded far-end machines through the relay antenna, amplifies the uplink signals through low noise, converts the amplified signals into an original network frequency band, and transmits the frequency band to the base station through the coupler. The uplink channel is opened only in the uplink time slot by the time slot synchronization unit, so that the interference to the original network and the fault of the self equipment are prevented.
Claims (8)
1. A chain type cascade TD-LTE frequency shift repeater system is characterized by comprising a near-end machine, at least one far-end machine and a remote maintenance center, wherein the near-end machine is provided with a first transceiving port and a second transceiving port, and the far-end machine is provided with a first transceiving port, a second transceiving port and a third transceiving port; wherein,
the first transceiving port of the near-end machine is in communication signal coupling with a base station, the second transceiving port of the near-end machine and the second transceiving port of the remote machine adjacent to the near-end machine perform signal transmission through a relay antenna, the first transceiving port of each remote machine is connected with a retransmission antenna to complete signal coverage, and the second transceiving port of the remote machine adjacent to the remote machine perform signal transmission through the relay antenna, or the third transceiving port of the remote machine and the third transceiving port of the remote machine adjacent to the remote machine perform signal transmission through the relay antenna;
the near-end machine and each far-end machine are respectively communicated with the remote maintenance center through signals covered by the local area, upload respective working state data to the remote maintenance center and receive control data of the remote maintenance center.
2. The chain cascade TD-LTE frequency shift repeater system of claim 1, wherein the near-end machine comprises a first cavity filter, a first power amplifier low noise amplifier unit, a first transceiver radio frequency unit, a first digital intermediate frequency unit, a second transceiver radio frequency unit, a second power amplifier low noise amplifier unit and a second cavity filter, which are connected in sequence.
3. The chain cascade TD-LTE frequency shift repeater system of claim 2, wherein the near end machine further comprises a time slot synchronization unit, a control unit, a clock unit and a communication unit; the control unit is respectively connected with the first power amplifier low-noise amplification unit, the first transceiver radio frequency unit, the first digital intermediate frequency unit, the second transceiver radio frequency unit, the second power amplifier low-noise amplification unit, the time slot synchronization unit, the clock unit and the communication unit through a bus, and uploads the working state data of each unit to the remote maintenance center through the communication unit, and receives the control data of the remote maintenance center through the communication unit.
4. The chain cascade TD-LTE frequency shift repeater system according to claim 1, wherein the remote end comprises a first cavity filter, a first power amplifier low noise amplifying unit, a first transceiver rf unit, a first digital if unit, a second transceiver rf unit, a second power amplifier low noise amplifying unit, a second cavity filter, a third digital if unit, a third transceiver rf unit, a third power amplifier low noise amplifying unit, a third cavity filter, which are connected in sequence; wherein the first digital intermediate frequency unit is connected with the second digital intermediate frequency unit and the third digital intermediate frequency unit, respectively.
5. The chain cascaded TD-LTE frequency shift repeater system according to claim 4, wherein said remote station further comprises a time slot synchronization unit, a control unit, a clock unit and a communication unit; the control unit is respectively connected with the first power amplification low-noise amplification unit, the first transceiving radio frequency unit, the first digital intermediate frequency unit, the second transceiving radio frequency unit, the second power amplification low-noise amplification unit, the third digital intermediate frequency unit, the third transceiving radio frequency unit, the third power amplification low-noise amplification unit, the time slot synchronization unit, the clock unit and the communication unit through a bus, and is used for uploading the working state data of each unit to the remote maintenance center through the communication unit and receiving the control data of the remote maintenance center through the communication unit.
6. The chain cascaded TD-LTE frequency shift repeater system of claim 1, wherein the relay antenna uses a yagi antenna or a helical antenna, and the retransmission antenna uses a plate antenna.
7. The chain cascaded TD-LTE frequency shift repeater system of claim 1, wherein said second transceiving port and said third transceiving port use the same signal transmission frequency.
8. The chain cascaded TD-LTE frequency shift repeater system of claim 1, wherein said near end unit and said far end unit further comprise a lightning protection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711386942.8A CN108023634A (en) | 2017-12-20 | 2017-12-20 | A kind of chain type cascades TD-LTE frequency-shift repeater station systems |
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| CN201711386942.8A CN108023634A (en) | 2017-12-20 | 2017-12-20 | A kind of chain type cascades TD-LTE frequency-shift repeater station systems |
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| CN117336767A (en) * | 2023-09-28 | 2024-01-02 | 北京唯得科技有限公司 | Method for determining abnormal message in 5G MIMO frequency-shifting two-way system |
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Application publication date: 20180511 |
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