CN107196688B - MIMO dual-polarization dual-channel broadband emission system for outdoor broadcast television - Google Patents
MIMO dual-polarization dual-channel broadband emission system for outdoor broadcast television Download PDFInfo
- Publication number
- CN107196688B CN107196688B CN201710552598.9A CN201710552598A CN107196688B CN 107196688 B CN107196688 B CN 107196688B CN 201710552598 A CN201710552598 A CN 201710552598A CN 107196688 B CN107196688 B CN 107196688B
- Authority
- CN
- China
- Prior art keywords
- dual
- switch tube
- predistortion
- filter
- control device
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
Abstract
The invention discloses an MIMO dual-polarized dual-channel broadband emission system for outdoor broadcasting and television, which comprises: a transmitting terminal and a receiving terminal, which specifically comprise a signal distributor, a first filter and a second filter respectively connected with two output terminals of the signal distributor, a first predistortion corrector connected with the first filter, a second predistortion corrector connected with the second filter, a first power amplifier connected with the first predistortion corrector, a second power amplifier connected with the second predistortion corrector, a first horizontal polarization antenna connected with the first power amplifier, a first vertical polarization antenna connected with the second power amplifier, a receiving terminal comprising a set-top box, a low noise amplifier and a switch tube which are connected in sequence, and a second horizontally polarized antenna and a second vertically polarized antenna connected to the switching tube, the receiving end further comprising a power supply control device, one end of the power supply control device is connected with the set top box, and the other end of the power supply control device is connected with the switch tube and the low noise amplifier, so that co-frequency interference can be effectively avoided.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to an MIMO dual-polarization dual-channel broadband transmitting system for outdoor broadcasting and television.
Background
In a conventional broadcast television broadband transmission system, a broadband transmitter generally transmits omni-directionally through a transmitting antenna, and a receiving end receives the broadband through a directional receiving antenna.
The Multiple-Input Multiple-output (MIMO) technology is a core technology that uses Multiple receiving antennas at a transmitting end and a receiving end, respectively, so that signals are transmitted and received through the Multiple antennas at the transmitting end and the receiving end, thereby improving communication quality, and can make full use of space resources, realize Multiple transmission and Multiple reception through the Multiple antennas, improve system channel capacity by Multiple times without increasing spectrum resources and antenna transmitting power, show obvious advantages, and be regarded as a next generation mobile communication.
However, with the further development of the international digital terrestrial television, various transmitting stations are increasing, the frequency resources of the decimetric wave band are limited, especially, the outdoor broadband transmitter is more and more deployed, the characteristics of low power and more stations appear, the problem of co-frequency interference among stations is more and more serious, and the co-frequency interference cannot be effectively avoided.
Disclosure of Invention
The invention mainly solves the technical problems that the problem of co-channel interference among stations is more and more serious and the co-channel interference cannot be effectively avoided, thereby providing an MIMO dual-polarized dual-channel broadband emission system of outdoor broadcast television and further effectively avoiding the co-channel interference.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides an outdoor broadcast TV MIMO dual polarization binary channels broadband transmitting system which characterized in that includes: the transmitting end comprises two groups of radio frequency signal transmission lines, and specifically comprises a signal distributor, a first filter and a second filter which are respectively connected with two output ends of the signal distributor, a first predistortion corrector connected with the first filter, a second predistortion corrector connected with the second filter, a first power amplifier connected with the first predistortion corrector, a second power amplifier connected with the second predistortion corrector, a first horizontal polarization antenna connected with the first power amplifier, and a first vertical polarization antenna connected with the second power amplifier, the receiving end comprises a set top box, a low noise amplifier, a switch tube, and a second horizontal polarization antenna and a second vertical polarization antenna connected with the switch tube which are sequentially connected, the receiving end further comprises a power supply control device, one end of the power supply control device is connected with the set top box, the other end of the switch tube is connected with the switch tube and the low-noise amplifier, the switch tube is conducted with the second horizontal polarization antenna when the power supply control device supplies power, and the switch tube is conducted with the second vertical polarization antenna when the power supply control device does not supply power.
Further, the first predistortion corrector and the second predistortion corrector are respectively used for carrying out broadband predistortion correction on the signals output by the signal distributor.
Further, the frequency of the radio frequency signal input to the signal distributor is greater than 50 MHz.
Further, the switching tube is used for isolating co-frequency signals.
The invention has the beneficial effects that: unlike the prior art case:
1. because the transmitting terminal with two groups of radio frequency signal transmission lines is adopted, the transmitting terminal is provided with a filter, a predistortion corrector and a power amplifier, finally, radio frequency signals are transmitted through the horizontal polarization antenna and the vertical polarization antenna, the receiving terminal also adopts the horizontal polarization antenna and the vertical polarization antenna to receive, the guidance of the switch tube is controlled through the power supply control device, the conduction of the horizontal polarization antenna or the conduction of the vertical polarization antenna is realized, even if the same frequency interference exists near a transmitting station, the isolation degree of 20dB can be realized through polarization isolation.
2. Because a group of radio frequency signals are divided into two groups, amplification and predistortion correction are respectively carried out, broadband predistortion correction is improved, and the transmission technical index of each group of signals of the transmitter is improved.
Drawings
Fig. 1 is a schematic block diagram of an outdoor broadcast television MIMO dual-polarization dual-channel broadband transmission system in an embodiment of the present invention.
Detailed Description
The invention mainly solves the technical problems that the problem of co-channel interference among stations is more and more serious and the co-channel interference cannot be effectively avoided, thereby providing an MIMO dual-polarized dual-channel broadband emission system of outdoor broadcast television and further effectively avoiding the co-channel interference.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The embodiment of the present invention provides an MIMO dual-polarization dual-channel broadband transmission system for outdoor broadcast television, as shown in fig. 1, which includes a transmitting end 10 and a receiving end 20, where the transmitting end 10 includes two sets of radio frequency signal transmission lines, and specifically includes a signal distributor 101, a first filter 102 and a second filter 103 respectively connected to two output ends of the signal distributor 101, the first predistortion corrector 104 being connected to the first filter 102, the second predistortion corrector 105 being connected to the second filter 103, a first power amplifier 106 being connected to the first predistortion corrector 104, a second power amplifier 107 being connected to the second predistortion corrector 105, a first horizontally polarized antenna 108 being connected to the first power amplifier 106, a first vertically polarized antenna 109 being connected to the second power amplifier 107, and the receiving end 20 includes a set-top box 201, a low noise amplifier 202, and a switch tube 203 which are connected in sequence, and a second horizontally polarized antenna 204 and a second vertically polarized antenna 205 connected to the switch tube 203, the receiving end 20 further includes a power supply control device 206, one end of the power supply control device 206 is connected to the set-top box 201, and the other end is connected to the switch tube 203 and the low noise amplifier 202, when the power supply control device 206 supplies power, the switch tube 203 is conducted with the second horizontally polarized antenna 204, and when the power supply control device 206 does not supply power, the switch tube 203 is conducted with the second vertically polarized antenna 205.
Thus, even if there is co-channel interference near the transmitting station, 20dB of isolation can be achieved by polarization isolation. And moreover, the shoulder of the broadband transmitter is improved, the shoulder of the traditional broadband transmitter is only 30dB generally because the predistortion correction technology cannot be realized, and the shoulder of the broadband transmitter is improved to more than 40dB by adopting the predistortion technology after the double-channel broadband transmitter is adopted.
In a specific embodiment, the first distortion corrector 104 and the second distortion corrector 105 are respectively used for performing wideband predistortion correction on the signal output by the signal distributor. Therefore, the Modulation Error Rate (MER) is improved, the modulation error rate of the original traditional broadband transmitter is generally below 29dB because the predistortion correction technology cannot be realized, and the MER is improved to be above 39dB by the predistortion correction technology after the double-channel broadband transmitter is adopted.
The frequency of the rf signal input to the signal distributor 101 is greater than 50MHz, avoiding losses during transmission.
The switch tube 203 is specifically used for isolating co-frequency signals, so that the isolation of the receiving end 20 can be improved by 60dB, the two signals are ensured not to interfere, and the co-frequency interference is suppressed.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. The utility model provides an outdoor broadcast TV MIMO dual polarization binary channels broadband transmitting system which characterized in that includes: the transmitting end comprises two groups of radio frequency signal transmission lines, and specifically comprises a signal distributor, a first filter and a second filter which are respectively connected with two output ends of the signal distributor, a first predistortion corrector connected with the first filter, a second predistortion corrector connected with the second filter, a first power amplifier connected with the first predistortion corrector, a second power amplifier connected with the second predistortion corrector, a first horizontal polarization antenna connected with the first power amplifier, and a first vertical polarization antenna connected with the second power amplifier, the receiving end comprises a set top box, a low noise amplifier, a switch tube, and a second horizontal polarization antenna and a second vertical polarization antenna connected with the switch tube which are sequentially connected, the receiving end further comprises a power supply control device, one end of the power supply control device is connected with the set top box, the other end of the switch tube is connected with the switch tube and the low-noise amplifier, when the power supply control device supplies power, the switch tube is conducted with the second horizontal polarization antenna, and when the power supply control device does not supply power, the switch tube is conducted with the second vertical polarization antenna;
the first predistortion corrector and the second predistortion corrector are respectively used for carrying out broadband predistortion correction on the signals output by the signal distributor.
2. The outdoor broadcast television MIMO dual-polarization dual-channel broadband transmission system of claim 1, wherein the frequency of the radio frequency signal of the input signal splitter is greater than 50 MHz.
3. The outdoor broadcast television MIMO dual-polarization dual-channel broadband transmission system according to claim 1, wherein the switch tube is used for isolating same-frequency signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710552598.9A CN107196688B (en) | 2017-07-07 | 2017-07-07 | MIMO dual-polarization dual-channel broadband emission system for outdoor broadcast television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710552598.9A CN107196688B (en) | 2017-07-07 | 2017-07-07 | MIMO dual-polarization dual-channel broadband emission system for outdoor broadcast television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107196688A CN107196688A (en) | 2017-09-22 |
| CN107196688B true CN107196688B (en) | 2020-07-28 |
Family
ID=59883684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710552598.9A Active CN107196688B (en) | 2017-07-07 | 2017-07-07 | MIMO dual-polarization dual-channel broadband emission system for outdoor broadcast television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107196688B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571548A (en) * | 2003-07-14 | 2005-01-26 | 陆仕海 | Method of base station antenna array polarization for wireless system |
| CN201365248Y (en) * | 2009-02-18 | 2009-12-16 | 深圳翔成电子科技有限公司 | Double output circular polarization satellite low noise block |
| CN102819015A (en) * | 2012-08-28 | 2012-12-12 | 电子科技大学 | Short-distance side-lobe frequency-modulated interrupted continuous-wave radar device |
| CN102955151A (en) * | 2012-10-09 | 2013-03-06 | 中国人民解放军63892部队 | Adaptive cross-polarization active jamming method and device |
| CN104469439A (en) * | 2013-09-24 | 2015-03-25 | 启碁科技股份有限公司 | Signal conversion device |
| CN104486568A (en) * | 2015-01-04 | 2015-04-01 | 安徽波维电子科技有限公司 | Double-power-module Ku waveband tuner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420634A (en) * | 2011-12-07 | 2012-04-18 | 捷开通讯科技(上海)有限公司 | Wireless communication transmitting and receiving system |
-
2017
- 2017-07-07 CN CN201710552598.9A patent/CN107196688B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571548A (en) * | 2003-07-14 | 2005-01-26 | 陆仕海 | Method of base station antenna array polarization for wireless system |
| CN201365248Y (en) * | 2009-02-18 | 2009-12-16 | 深圳翔成电子科技有限公司 | Double output circular polarization satellite low noise block |
| CN102819015A (en) * | 2012-08-28 | 2012-12-12 | 电子科技大学 | Short-distance side-lobe frequency-modulated interrupted continuous-wave radar device |
| CN102955151A (en) * | 2012-10-09 | 2013-03-06 | 中国人民解放军63892部队 | Adaptive cross-polarization active jamming method and device |
| CN104469439A (en) * | 2013-09-24 | 2015-03-25 | 启碁科技股份有限公司 | Signal conversion device |
| CN104486568A (en) * | 2015-01-04 | 2015-04-01 | 安徽波维电子科技有限公司 | Double-power-module Ku waveband tuner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107196688A (en) | 2017-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102322541B1 (en) | Multi-way switches, radio frequency systems and radio communication devices | |
| US9369320B2 (en) | Communication system having cross polarization interference cancellation (XPIC) | |
| KR102325809B1 (en) | Multi-way switches, radio frequency systems and radio communication devices | |
| CN103427874B (en) | System and method for canceling high-transmission-power same-time same-frequency self-interference under multi-path environment | |
| US11659409B2 (en) | Non-line-of-sight (NLOS) coverage for millimeter wave communication | |
| CN104283827A (en) | Distributed radio system | |
| CN204013568U (en) | The multi-carrier communication apparatus of tdd mode mimo wireless communication system | |
| CN103327508A (en) | Access system for transmitting wireless signals and Ethernet signals by power line | |
| CN104092526A (en) | Multi-carrier communicating method and device for TDD mode MIMO wireless communicating system | |
| CN102983834A (en) | Filter amplifier | |
| CN105490714A (en) | Terminal, and method for transmitting and receiving multiple carriers thereof | |
| CN104283600A (en) | Distributed radio system | |
| CN102420679A (en) | Relay collaborative precoding-based multi-user two-way communication method | |
| CN205211920U (en) | Cell -phone LTE antenna and MIMO antenna thereof | |
| CN103457618B (en) | Radio frequency chip front-end system and signal processing method thereof | |
| CN107196688B (en) | MIMO dual-polarization dual-channel broadband emission system for outdoor broadcast television | |
| CN202713297U (en) | Remote machine and repeater system | |
| CN104301909A (en) | Indoor distribution system MIMO single cable covering method and system | |
| CN111565054B (en) | Variable frequency communication transmission method and system | |
| CN104301910A (en) | CATV cable-sharing multi-mode room division multiplexing method and system | |
| CN114631265B (en) | Antenna transceiver module, multiple-input multiple-output antenna transceiver system and base station | |
| US11165165B2 (en) | Antenna system, base station, and communications system | |
| US20200287586A1 (en) | Network routing device, network data transmission method, and network access device | |
| CN104954071A (en) | LTE (long term evolution)-Advanced full-digital optical fiber relay system and implementation method thereof | |
| CN204031127U (en) | A kind of high power broadband emission device for the white frequency spectrum of 10GHz-12GHz |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |