CN112468186A - 5G signal transmission system based on coaxial cable - Google Patents
5G signal transmission system based on coaxial cable Download PDFInfo
- Publication number
- CN112468186A CN112468186A CN202011386081.5A CN202011386081A CN112468186A CN 112468186 A CN112468186 A CN 112468186A CN 202011386081 A CN202011386081 A CN 202011386081A CN 112468186 A CN112468186 A CN 112468186A
- Authority
- CN
- China
- Prior art keywords
- signal
- original
- coaxial cable
- output unit
- transmission system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
Abstract
The invention provides a 5G signal transmission system based on a coaxial cable, which comprises a signal preprocessing module, a coupler, a distributor and a plurality of terminal devices, wherein the coupler is used for receiving a signal transmitted by a signal transmission module; the signal preprocessing module is used for carrying out level adjustment and impedance conversion on the original 5G signal; the coupler is used for carrying out signal coupling on the processed 5G signal and the original HFC radio frequency signal to form a combined transmission signal; a distributor for distributing the combined transmission signal to each terminal device; the terminal device comprises a first output unit and a second output unit; the first output unit is used for filtering out the original HFC radio frequency signal and transferring the HFC radio frequency signal to the feeder line; and the second output unit is used for performing impedance conversion on the filtered 5G signal and then transmitting the signal to the antenna. According to the invention, the original 5G signal is subjected to level adjustment and impedance conversion, and indoor 5G wireless signal transmission can be realized based on the traditional broadcasting and television HFC pipeline network, so that the construction cost of an indoor 5G signal transmission system is greatly reduced.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a 5G signal transmission system based on a coaxial cable.
Background
With the popularization of mobile terminals, high-quality wireless access signals are more and more sought after by users. At present, operators have developed the installation work of arranging wireless base stations outdoors, and the main method for solving the problem of no signal or weak signal of mobile equipment indoors is to arrange feeder networks and newly added equipment indoors such as BBUs (Building base band units, indoor Baseband processing units), RRUs (Remote Radio units, Remote Radio modules) and the like in buildings, but the related transformation needs to invest a large amount of manpower and material resources. In addition, for the dispute problem that the cable laying in the place with the floor handed over is large in limitation, the building cannot enter the building, the domestic indoor 5G wireless signals cannot be completely covered in time, and the indoor 5G signal coverage becomes a signal blind area at present.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a 5G signal transmission system based on a coaxial cable, which can implement indoor 5G wireless signal transmission based on a broadcast-television traditional HFC pipeline network, thereby reducing the construction cost of the indoor 5G signal transmission system.
In order to solve the technical problem, the invention provides a 5G signal transmission system based on a coaxial cable, which comprises a signal preprocessing module, a coupler, a distributor and a plurality of terminal devices;
the signal preprocessing module is used for adjusting the level of an original 5G signal to be within a preset level range according to a preset first rule and converting the impedance of the original 5G signal into the adaptive impedance of the coaxial cable according to a second rule;
the coupler is used for carrying out signal coupling on the 5G signal processed by the signal preprocessing module and the original HFC radio frequency signal to form a combined transmission signal;
the distributor is used for distributing the received combined transmission signal to each terminal device;
the terminal equipment comprises a first output unit and a second output unit;
the first output unit is used for filtering the original HFC radio frequency signal from the combined transmission signal and transferring the HFC radio frequency signal to a feeder line through a BNC adapter;
and the second output unit is used for filtering the 5G signal from the combined transmission signal, then performing impedance conversion on the 5G signal according to a third rule, and transferring the 5G signal to an antenna through a BNC adapter.
Further, the signal preprocessing module comprises a level adjusting unit and a first converter; wherein the content of the first and second substances,
the level adjusting unit is used for adjusting the level of the original 5G signal to be within a preset level range according to a preset first rule;
the first converter is used for performing impedance conversion on the 5G signal into adaptive impedance of the coaxial cable according to a second rule.
Further, the second output unit is specifically configured to filter the 5G signal from the combined transmission signal, perform impedance conversion on the 5G signal through a second converter according to a third rule, and forward the 5G signal to an antenna through a BNC adapter.
Further, the preset level range is 40-60 dbm.
Further, the original 5G signal is a 700MHz frequency band signal.
Further, the adapted impedance of the coaxial cable is 75 ohms.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a 5G signal transmission system based on a coaxial cable, which comprises a signal preprocessing module, a coupler, a distributor and a plurality of terminal devices, wherein the coupler is used for receiving a signal transmitted by a signal transmission module; the signal preprocessing module is used for carrying out level adjustment and impedance conversion on the original 5G signal; the coupler is used for carrying out signal coupling on the processed 5G signal and the original HFC radio frequency signal to form a combined transmission signal; a distributor for distributing the combined transmission signal to each terminal device; the terminal device comprises a first output unit and a second output unit; the first output unit is used for filtering out the original HFC radio frequency signal and transferring the HFC radio frequency signal to the feeder line; and the second output unit is used for performing impedance conversion on the filtered 5G signal and then transmitting the signal to the antenna. According to the invention, the original 5G signal is subjected to level adjustment and impedance conversion, and indoor 5G wireless signal transmission can be realized based on the traditional broadcasting and television HFC pipeline network, so that the construction cost of an indoor 5G signal transmission system is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a 5G signal transmission system based on coaxial cables according to an embodiment of the present invention;
fig. 2 is a schematic transmission diagram of an AUU device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a networking scheme of a coaxial cable-based 5G signal transmission system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a 5G signal transmission system based on a coaxial cable, including a signal preprocessing module, a coupler, a distributor, and a plurality of terminal devices;
the signal preprocessing module is used for adjusting the level of an original 5G signal to be within a preset level range according to a preset first rule and converting the impedance of the original 5G signal into the adaptive impedance of the coaxial cable according to a second rule. In the embodiment of the present invention, further, the original 5G signal is a 700MHz frequency band signal; the adapted impedance of the coaxial cable is 75 ohms.
In the embodiment of the present invention, further, the signal preprocessing module includes a level adjustment unit and a first converter; wherein the content of the first and second substances,
the level adjusting unit is used for adjusting the level of the original 5G signal to be within a preset level range according to a preset first rule; further, the preset level range is 40-60 dbm.
The first converter is used for performing impedance conversion on the 5G signal into adaptive impedance of the coaxial cable according to a second rule.
The coupler is used for carrying out signal coupling on the 5G signal processed by the signal preprocessing module and the original HFC radio frequency signal to form a combined transmission signal;
the distributor is used for distributing the received combined transmission signal to each terminal device;
the terminal equipment comprises a first output unit and a second output unit;
the first output unit is used for filtering the original HFC radio frequency signal from the combined transmission signal and transferring the HFC radio frequency signal to a feeder line through a BNC adapter;
and the second output unit is used for filtering the 5G signal from the combined transmission signal, then performing impedance conversion on the 5G signal according to a third rule, and transferring the 5G signal to an antenna through a BNC adapter.
In an embodiment of the present invention, the second output unit is specifically configured to filter out the 5G signal from the combined transmission signal, and then perform impedance conversion on the 5G signal through a second converter according to a third rule and forward the 5G signal to an antenna through a BNC adapter. The second converter is an inverse converter of the first converter.
It should be noted that, under the traditional HFC (coaxial cable) pipeline network signal based on broadcast and television, the invention can effectively reduce the cost and the construction investment by virtue of the advantage of the 700MHz wireless frequency band, and simultaneously realize the indoor 5G wireless signal transmission based on the coaxial cable.
The radio and television coaxial network authorization (1-10 GHmz), the 700MHz wireless band developed in the radio and television industry at present includes uplink 703-. In addition, in the world, more and more countries pay attention to the utilization of 700MHz, and operators and colleges are encouraged to develop the research on the 700MHz transmission technology. The use of the 700MHz band to arrange 5G signal communication is undoubtedly becoming a new trend.
Through tests, when the transmission frequency point of the signal is 750MHz, the theoretical value level value of the attenuation is 17db in 100 meters of RG6 coaxial cables. Compared with the loss of 5G signals with the frequency of 2.5G in the air, the loss is 80db per 100m, so that the loss of the 5G signals with the frequency of 700MHz is lower in a wired network, and the advantage is larger.
Referring to fig. 2-3, based on the above solutions, in order to better understand the 5G signal transmission system based on coaxial cable provided in the embodiments of the present invention, the following detailed description is provided for a specific deployment manner of the system:
(1) the theoretical output level of the current 5G Antenna (such as mobile AAU equipment, AAU full name Active Antenna Unit, Active Antenna processing Unit) is about 54dbm, and the output power of the cable television amplifier (i.e. the CATV equipment for building amplifier in fig. 3) can support 40-60dbm, which satisfies the power value requirement of wireless input and output of the 5G Antenna. If the level difference between the 700MHz 5G signal from the mobile AAU (as shown in fig. 2) and the original HFC is too large, mutual interference and distortion will occur, so it is necessary to adjust the level of the newly inserted 700MHz signal to make the level of the two signals as similar as possible.
(2) When the 700MHz signal is adjusted by level, it is mixed with the RF signal of HFC network. However, since the impedance of the coaxial cable commonly used by the radio and television operators is 75 ohms, an impedance converter (as shown in fig. 3) is required to be connected after the mobile AAU transmission equipment, so that the 700MHz signal conversion can be performed from 50 ohms to 75 ohms.
(3) After conversion, the 700MHz signal can be transmitted to the subscriber distribution network (to the terminal equipment in each home) through the coupler, distributor and other components in a matching manner with the broadcast HFC signal. Before the step (4), the original circuit can keep the original setting except for the newly added equipment without any change.
(4) As with most subscriber terminal panels, signals are accessed via an F-header on the panel. However, when the signal passes through the user-side duplex filter, two paths are separated by two groups of filters:
one path is a filter for passing 700MHz, and only 700MHz wireless signals are filtered out. In addition, an impedance converter is still needed to be connected behind the mobile terminal to convert the signal from 75-ohm impedance to 50-ohm impedance, the signal is converted out of the antenna through the BNC adapter, and a 5G wireless transmission signal of 700MHz is output, so that the communication of the current mobile terminal is facilitated; it should be noted that the finally output wireless transmission signal is the 700MHz signal that is initially input as the signal source, and it can be understood that, after the signal is transferred out of the antenna through the BNC adapter, the 700MHz wired signal (which is inserted and transmitted on the HFC network, that is, the part is transmitted on the wired network) can be converted into the 700MHz wireless signal, which is convenient for the receiving of the intelligent terminal such as a 5G mobile phone, for example;
the other path is a filter for blocking 700MHz, only HFC signals are filtered out, and the signals are transferred out of a feeder line through a BNC adapter and can be used for transmitting the HFC signals (including television and broadband signals) for communication.
Similarly, the uplink signal communication is consistent with the reverse transmission.
Therefore, the embodiment of the invention realizes the indoor 5G wireless signal transmission based on the coaxial line, and only needs to solve three problems. (1) The level output range of 700MHz level needs to be properly adjusted to match the level problem of 700MHz signal transmitter; (2) the impedance problem of a transmitter of 700MHz is solved, and the impedance of the signal can be changed by accessing an impedance converter. (3) And finally, adjusting the terminal equipment, wherein the terminal separation panel for transmitting HFC signals and 700MHz signals which is popularized in the market is not popularized yet, so that the terminal equipment needs to be adjusted, and one terminal equipment is provided with two sets of duplex filters.
It should be noted that the above method or flow embodiment is described as a series of acts or combinations for simplicity, but those skilled in the art should understand that the present invention is not limited by the described acts or sequences, as some steps may be performed in other sequences or simultaneously according to the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are exemplary embodiments and that no single embodiment is necessarily required by the inventive embodiments.
It should be noted that, by implementing the embodiment of the present invention, the advantage of wide coverage of the radio and television transmission network can be fully exerted:
(1) by utilizing wired medium transmission of broadcasting HFC, indoor wires can be greatly reduced from being laid again and purchased by a wireless base station, and the construction cost is reduced. In addition, the installation and the construction are convenient and flexible, only the terminal panel and a small part of 700MHz related equipment need to be replaced, and the pressure of a line of maintenance personnel is reduced.
(2) With the popularization of the 5G equipment of the user, the 5G wireless signal transmission of the user can be realized without adopting terminal receiving equipment with a customized frequency band, and the terminal construction investment is greatly reduced.
(3) Through tests, when the transmission frequency point of the signal is 750MHz, the theoretical value level value of the attenuation is 17db in 100 meters of RG6 coaxial cables. Compared with the loss of 5G signals with the frequency of 2.5G in the air, the loss is 80db per 100m, so that the loss of the 5G signals with the frequency of 700MHz is lower in a wired network, and the advantage is larger.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (6)
1. A5G signal transmission system based on coaxial cables is characterized by comprising a signal preprocessing module, a coupler, a distributor and a plurality of terminal devices;
the signal preprocessing module is used for adjusting the level of an original 5G signal to be within a preset level range according to a preset first rule and converting the impedance of the original 5G signal into the adaptive impedance of the coaxial cable according to a second rule;
the coupler is used for carrying out signal coupling on the 5G signal processed by the signal preprocessing module and the original HFC radio frequency signal to form a combined transmission signal;
the distributor is used for distributing the received combined transmission signal to each terminal device;
the terminal equipment comprises a first output unit and a second output unit;
the first output unit is used for filtering the original HFC radio frequency signal from the combined transmission signal and transferring the HFC radio frequency signal to a feeder line through a BNC adapter;
and the second output unit is used for filtering the 5G signal from the combined transmission signal, then performing impedance conversion on the 5G signal according to a third rule, and transferring the 5G signal to an antenna through a BNC adapter.
2. The coaxial cable-based 5G signal transmission system according to claim 1, wherein the signal preprocessing module comprises a level adjustment unit and a first converter; wherein the content of the first and second substances,
the level adjusting unit is used for adjusting the level of the original 5G signal to be within a preset level range according to a preset first rule;
the first converter is used for performing impedance conversion on the 5G signal into adaptive impedance of the coaxial cable according to a second rule.
3. The coaxial cable-based 5G signal transmission system according to claim 1, wherein the second output unit is specifically configured to filter the 5G signal from the combined transmission signal, and then perform impedance conversion on the 5G signal through a second converter according to a third rule and forward the 5G signal to an antenna through a BNC adapter.
4. The coaxial cable-based 5G signal transmission system according to any one of claims 1 to 3, wherein the preset level range is 40-60 dbm.
5. The coaxial cable-based 5G signal transmission system of claim 4, wherein the original 5G signal is a 700MHz band signal.
6. The coaxial cable-based 5G signal transmission system according to claim 5, wherein the adapted impedance of the coaxial cable is 75 ohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386081.5A CN112468186A (en) | 2020-11-30 | 2020-11-30 | 5G signal transmission system based on coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386081.5A CN112468186A (en) | 2020-11-30 | 2020-11-30 | 5G signal transmission system based on coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112468186A true CN112468186A (en) | 2021-03-09 |
Family
ID=74805171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011386081.5A Pending CN112468186A (en) | 2020-11-30 | 2020-11-30 | 5G signal transmission system based on coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112468186A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902211A (en) * | 2015-06-25 | 2015-09-09 | 公安部第三研究所 | System for realizing 4G signal deep coverage based on radio and television platform coaxial cable |
| CN110912983A (en) * | 2019-11-20 | 2020-03-24 | 瑞玛思特(北京)科技有限公司 | 5G and Internet of things equipment-oriented cloud integrated measurement and control platform |
| US20200336111A1 (en) * | 2019-04-18 | 2020-10-22 | Qorvo Us, Inc. | Multi-bandwidth envelope tracking integrated circuit |
-
2020
- 2020-11-30 CN CN202011386081.5A patent/CN112468186A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902211A (en) * | 2015-06-25 | 2015-09-09 | 公安部第三研究所 | System for realizing 4G signal deep coverage based on radio and television platform coaxial cable |
| US20200336111A1 (en) * | 2019-04-18 | 2020-10-22 | Qorvo Us, Inc. | Multi-bandwidth envelope tracking integrated circuit |
| CN110912983A (en) * | 2019-11-20 | 2020-03-24 | 瑞玛思特(北京)科技有限公司 | 5G and Internet of things equipment-oriented cloud integrated measurement and control platform |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH09510071A (en) | Subscriber return system for all service CATV networks | |
| CN101388821B (en) | Access network implementing system and method for bearing all information services of local customer | |
| CN202364383U (en) | Depth coverage system for realizing wireless signal to building/home by using CATV (Community Antenna Television) coaxial cables | |
| CN203840547U (en) | Mobile signal coverage equipment based on EOC | |
| CN101072145A (en) | Wireless LAN indoor covering system | |
| CN103929314A (en) | Multi-mode access novel EOC device | |
| CN1787519B (en) | Apparatus for realizing data transmitting and data access system thereof | |
| CN112468186A (en) | 5G signal transmission system based on coaxial cable | |
| CN201243307Y (en) | Novel energy-saving chamber subsystem for wireless network | |
| CN110808784A (en) | Outdoor 5G micro-station system based on broadcasting and TV HFC network | |
| CN208908473U (en) | A kind of wired TV network transmission wireless signal system | |
| CN100536424C (en) | Downlink carrier network and its method for transmitting downlink data | |
| KR102003800B1 (en) | Integrated customer device box | |
| US8462830B2 (en) | Radio frequency distribution with spreading | |
| CN211909183U (en) | Micro base station and home-entry system of TVWS frequency band | |
| CN204681495U (en) | Indoor signal transmission system | |
| JP4503130B2 (en) | Internet connection device | |
| CN107371070A (en) | A kind of method that digital television signal mends point optimization covering | |
| CN113727361A (en) | Mobile network indoor signal coverage system | |
| CN213638000U (en) | 5G fuses access network based on DOCSIS | |
| CN101959206B (en) | Method and system for realizing wireless communication signal coverage through CATV cable | |
| CN103165967B (en) | A kind of coupler and the common transport system based on repeater room subsystem | |
| EP1695479B1 (en) | System for signals distribution to a plurality of users | |
| CN201937828U (en) | GSM digital enclave system | |
| WO2005002115A2 (en) | External mid-split converter for standard cable modem |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210309 |