CN201274529Y - Frequency selecting and converting forwarding device for digital television - Google Patents
Frequency selecting and converting forwarding device for digital television Download PDFInfo
- Publication number
- CN201274529Y CN201274529Y CNU2008201455023U CN200820145502U CN201274529Y CN 201274529 Y CN201274529 Y CN 201274529Y CN U2008201455023 U CNU2008201455023 U CN U2008201455023U CN 200820145502 U CN200820145502 U CN 200820145502U CN 201274529 Y CN201274529 Y CN 201274529Y
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- local oscillator
- communication port
- selecting
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Radio Relay Systems (AREA)
Abstract
The utility model relates to a digital television frequency-selection frequency-variable repeater; a weak radio signal in the air is received by a main antenna, and is filtered by a forestage filter, and is amplified by a low noise amplifier, and is selected the frequency by a frequency-selection converter and is converted to the frequency that is required to be repeated, and then is amplified and outputted by a power amplifier, and is filtered by a rear-stage filter and is repeated by a repeating antenna to cover the area that is required to be covered. The digital television frequency-selection frequency-variable repeater also comprises an intelligent monitoring system that is used for setting up the input and the output frequency points of the frequency-selection converter and for controlling the selection of the channels. With the digital television frequency-selection frequency-variable repeater, not only the restriction of the separation for the device can be reduced, but also the required frequency point signal can be effectively amplified through the selection of the frequency-selection channels; at the same time, the interference of the useless signal between the frequency points can be eliminated, and the control is convenient and flexible; therefore, the digital television frequency-selection frequency-variable repeater is very applicable to the area on which the variation of the frequency points is serious.
Description
Technical field
The utility model relates to a kind of transponder, refers to a kind of Digital Television transponder especially and is applied to the frequency-selecting frequency translating transponder of this Digital Television.
Background technology
Along with the continuous upgrading and the development of information industry technology, the development of terrestrial DTV gets most of the attention.At present, the ground digital television signal in most of area all adopts high-power transmitter to carry out wireless coverage, but some outlying district is owing to be subjected to restriction such as geographical conditions, and signal can't be finished covering, and therefore the forwarding unit that adopts relaying to amplify carries out wireless coverage to these areas.
The forwarding unit of general wireless receiving as shown in Figure 1, is all taken from the space coupled signal, and is with frequently, so its working gain is subjected to the restriction of receiving terminal and transmitting terminal isolation between antennas, in case isolation is not enough, just causes the equipment self-excitation easily.
On the one hand, guarantee that self-excitation does not take place common-frequency repeater, common way is the isolation between antennas that improves between transponder receiving terminal and the transmitting terminal.In fact, during using, plant engineering is subjected to the restriction of various environmental factors, wanting to improve the experience that its situation relies on the engineering staff basically goes to judge, even the costliness of carrying and heavy tester are tested to the scene, the data of test also only are that state is constantly installed in reaction, environment is on every side but constantly changing, and the stability of isolation can't guarantee just than the self-excitation that is easier to cause equipment.
On the other hand, the frequency that transmit in some area is not fixed, and is not that a plurality of continuous frequencies are transmitted, but the interval of one or more frequencies is arranged between frequency and the frequency.If adopt the broadband with transmitting frequently, easily unwanted frequency is amplified, can carry out interference to useful signal simultaneously, influence the quality that terminal receives.
The utility model content
Based on foregoing, be necessary to provide a kind of Digital Television frequency-selecting frequency translating transponder, it not only can reduce the restriction of on-the-spot isolation to equipment, and the unwanted signal that also can eliminate between frequency and the frequency disturbs.
This Digital Television frequency-selecting frequency translating transponder comprises a donor antenna, a prime filter, a low noise amplifier, an intelligent monitor system, a modulator-demodulator, a power amplifier, a back grade filter, a retransmitting antenna, a frequency-selecting frequency converter and a power-supply system.Donor antenna carries out filtering through the prime filter after receiving the on-air radio weak signal, through low noise amplifier signal is amplified after the filtering, select the frequency of input signal and it is converted to the frequency of required forwarding by the frequency-selecting frequency converter, by power amplifier it is carried out with amplifying output frequently, through carrying out wireless coverage by retransmitting antenna to required overlay area behind the level filter filtering later again.Wherein, intelligent monitor system is inquired about and is controlled the operating state of low noise amplifier and power amplifier, the frequency-selecting frequency converter is carried out the selection control of input and output frequency point setting and passage.Power-supply system is that in the transponder each has source module to power.
This is used for the frequency-selecting frequency converter of Digital Television frequency-selecting frequency translating transponder, and it comprises a multi-path power divider, a multi-circuit combiner, a control circuit, at least two communication ports and at least two power switch circuits.Wherein, the corresponding communication port of each power switch circuit is used to control the unlatching of corresponding communication port or close.Multi-path power divider is used for that radiofrequency signal is divided into the multi-channel rf signal and delivers to described communication port.This communication port comprises a down-conversion mixer, one first local oscillator, an intermediate-frequency filter, one second local oscillator and a up-conversion mixer.This first local oscillator produces first local oscillation signal and delivers to the down-conversion mixer of connection.The intermediate-frequency filter that this down-conversion mixer carries out radiofrequency signal and first local oscillation signal to become intermediate-freuqncy signal under the mixing and delivers to connection.This intermediate-frequency filter intermediate-freuqncy signal is carried out Filtering Processing and will handle after intermediate-freuqncy signal deliver to the up-conversion mixer of connection.This second local oscillator produces second local oscillation signal and delivers to the up-conversion mixer of connection.This up-conversion mixing carries out becoming in the mixing frequency signal that meets the transmission need and the multi-circuit combiner of delivering to connection with the filtered intermediate-freuqncy signal and second local oscillation signal.This multi-circuit combiner will synthesize and export to a power amplifier from the signal that described communication port produces.This control circuit links to each other with described power switch circuit, first local oscillator and second local oscillator, controls the local oscillation signal that first local oscillator and second local oscillator produce corresponding frequencies, and corresponding communication port is opened or closed to the control power switch circuit.
Compared to prior art, this Digital Television frequency-selecting frequency translating transponder, not only can reduce the restriction of isolation to equipment, and by control to the frequency-selecting passage, frequency signal with needs amplifies effectively, eliminated simultaneously the interference of unwanted signal between frequency and the frequency again, control is convenient, flexible, is highly suitable for frequency variation area greatly.
Description of drawings
Fig. 1 is the hardware structure figure of existing Digital Television common-frequency repeater.
Fig. 2 is the hardware structure figure of the utility model Digital Television frequency-selecting frequency translating transponder in an execution mode.
Fig. 3 is the hardware structure figure of frequency-selecting frequency converter in an execution mode among Fig. 2.
Fig. 4 is the hardware structure figure of communication port in an execution mode among Fig. 3.
Fig. 5 is the hardware structure figure that the frequency-selecting frequency converter adopts one or four frequency-selecting frequency converters among Fig. 2 in an execution mode.
Embodiment
As shown in Figure 2, be the hardware structure figure of the utility model Digital Television frequency-selecting frequency translating transponder in an execution mode.This Digital Television frequency-selecting frequency translating transponder comprises a donor antenna 10, a prime filter 11, a low noise amplifier 12, an intelligent monitor system 13, a modulator-demodulator 14, a power amplifier 15, a back grade filter 16, a retransmitting antenna 17, a frequency-selecting frequency converter 18, a local oscillator 19 and a power-supply system 20.
Wherein, the output of donor antenna 10 is connected to the input of prime filter 11, the output of prime filter 11 is connected to the input of low noise amplifier 12, the output of low noise amplifier 12 is connected to the input of frequency-selecting frequency converter 18, the output of frequency-selecting frequency converter 18 is connected to the input of power amplifier 15, the output of power amplifier 15 is connected to the input of back level filter 16, and the output of back level filter 16 is connected to retransmitting antenna 17.
After receiving the on-air radio weak signal, donor antenna 10 carries out filtering through prime filter 11, through low noise amplifier 12 signal is amplified after the filtering, select the frequency of input signal and it is converted to the frequency of required forwarding by frequency-selecting frequency converter 18, by power amplifier 15 it is amplified output again, through carrying out wireless coverage by retransmitting antenna 17 to required overlay area after 16 filtering of level filter later.Wherein, intelligent monitor system 13 links to each other with low noise amplifier 12, power amplifier 15 and frequency-selecting frequency converter 18, operating state to low noise amplifier 12 and power amplifier 15 is inquired about and is controlled, and frequency-selecting frequency converter 18 is carried out the selection control of input and output frequency point setting and passage.This intelligent monitor system 13 also links to each other with modulator-demodulator 14, carries out the transmitting-receiving of note with it.Each has source module to power to power-supply system 20 in the transponder.
In the present embodiment, this low noise amplifier 12 is one to have that input power detects and the low noise amplifier of automatic electric-level control, and this power amplifier 15 is one to have the power amplifier that power output detects and automatic electric-level is controlled.
This frequency-selecting frequency converter 18 has the function of controllable channel switch, can realize that single frequency point arrives the frequency-selecting of a plurality of frequencies.This frequency-selecting frequency converter 18, as shown in Figure 3, comprise a multi-path power divider 180, a plurality of communication port 181 (181a, 181b ... 181n) a plurality of power switch circuits 182 (182a, 182b ... 182n), a control circuit 183 and a multi-circuit combiner 184.Wherein, each power switch circuit 182 corresponding communication port 181 is used to control the unlatching of corresponding communication port 181 or close.These multi-path power divider 180 inputs connect low noise amplifier 12, are used for the radiofrequency signal from this low noise amplifier 12 is divided into the multi-channel rf signal and delivers to communication port 181.
Communication port 181 as shown in Figure 4, comprises a down-conversion mixer 30, an intermediate-frequency filter 31, local oscillator 32, local oscillator 33 and a up-conversion mixer 34.Wherein, the input of intermediate-frequency filter 31 links to each other with down-conversion mixer 30, and output links to each other with up-conversion mixer 34.Local oscillator 32 links to each other with down-conversion mixer 30, is used to produce first local oscillation signal and delivers to this down-conversion mixer 30.Local oscillator 33 links to each other with up-conversion mixer 34, is used to produce second local oscillation signal and delivers to this up-conversion mixer 34.The input of this down-conversion mixer 30 links to each other with multi-path power divider 180 and local oscillator 32, and output links to each other with intermediate-frequency filter 31.This down-conversion mixer 30 is used for and will carries out mixing from the radiofrequency signal of this multi-path power divider 180 and first local oscillation signal of local oscillator 32, the following intermediate-frequency filter 31 that becomes intermediate-freuqncy signal and deliver to connection.This intermediate-frequency filter 31, in the present embodiment, be one to have the intermediate-frequency filter of special bandwidth, this intermediate-freuqncy signal is carried out Filtering Processing, other spurious signal of filtering is also selected the channel information of required frequency conversion, be required intermediate-freuqncy signal, the intermediate-freuqncy signal after this processing is delivered to up-conversion mixer 34.This up-conversion mixer carries out mixing with the filtered intermediate-freuqncy signal and second local oscillation signal, on change to the frequency signal that meets the transmission needs, and deliver to the multi-circuit combiner 34 of connection.
This multi-circuit combiner 184 is used for the signal from communication channel 181 (being up-conversion mixer 34) being synthesized and exporting to power amplifier 15.This control circuit 183 links to each other with described power switch circuit 182, local oscillator 32 and local oscillator 33, be used to control the local oscillation signal of local oscillator 32 and local oscillator 33 generation corresponding frequencies, and corresponding communication port 181 is opened or closed to control power switch circuit 182.
As shown in Figure 5, be the hardware structure figure that frequency-selecting frequency converter 18 adopts one or four frequency-selecting frequency converters among Fig. 2 in an execution mode.In this execution mode, this multi-path power divider 180 is one four road power splitter; Communication port 181 comprises communication port 181a, communication port 181b, communication port 181c and communication port 181d; Power switch circuit 182 comprises power switch circuit 182a, power switch circuit 182b, power switch circuit 182c and power switch circuit 182d; Multi-circuit combiner 184 is one four road mixer; Control circuit 183 is a cpu control circuit.
The incoming frequency of this four frequency-selectings frequency converter and output frequency can be provided with corresponding frequency by intelligent monitor system 13 and realize.For example, suppose that the input frequency is 13,15,17,19, the output frequency is 41,43,45,47.When certain area needs only two frequencies of transmission, then can produce control corresponding and instruct, make it close two communication ports 181 wherein and the corresponding frequency of frequency in and out that other two passages are set gets final product to cpu control circuit 183 by intelligent monitor system 13.By that analogy, the Digital Television frequency-selecting frequency translating transponder of one or four frequency conversions of frequency-selecting frequently can be controlled the frequency-selecting that realizes single frequency point to four frequency by passage and transmit, and control is convenient, flexible.
The Digital Television frequency-selecting frequency translating transponder and the frequency-selecting frequency converter 18 that provide by the utility model, after it carries out Filtering Processing with the ground digital television signal that receives, carry out frequency-selecting and passage control by the frequency of 13 pairs of required forwardings of intelligent monitor system, transforming to intermediate frequency is converted to another frequency and signal is amplified covers behind intermediate frequency filtering, the user directly receives the signal after the frequency conversion, reduced on-the-spot insulated degree requirement, and can multistage relay, effectively enlarge the coverage of terrestrial DTV emission system, improve the weak signal area error rate, improve the quality of reception, networking flexibility, networking is rapid, save networking costs such as machine room, reach the degree of depth and cover.
Claims (8)
1. a Digital Television frequency-selecting frequency translating transponder comprises a donor antenna, a prime filter, a low noise amplifier, an intelligent monitor system, a modulator-demodulator, a power amplifier, a back grade filter and a retransmitting antenna, it is characterized in that:
The frequency-selecting frequency converter that this transponder is included, it links to each other with low noise amplifier, intelligent monitor system and power amplifier, and this frequency-selecting frequency converter comprises:
One multi-path power divider;
One multi-circuit combiner;
One control circuit;
At least two communication ports; And
At least two power switch circuits, the corresponding communication port of each power switch circuit is used to control the unlatching of corresponding communication port or close;
Wherein, this multi-path power divider links to each other with low noise amplifier, is used for that the radiofrequency signal from low noise amplifier is divided into the multi-channel rf signal and delivers to described communication port;
This communication port comprises a down-conversion mixer, one first local oscillator, an intermediate-frequency filter, one second local oscillator and a up-conversion mixer;
Wherein, this first local oscillator down-conversion mixer of being used to produce first local oscillation signal and delivering to connection;
This down-conversion mixer is used for intermediate-frequency filter that radiofrequency signal and first local oscillation signal are carried out becoming intermediate-freuqncy signal under the mixing and deliver to connection;
This intermediate-frequency filter be used for that intermediate-freuqncy signal carried out Filtering Processing and will handle after intermediate-freuqncy signal deliver to the up-conversion mixer of connection;
The up-conversion mixer that this second local oscillator is used to produce second local oscillation signal and delivers to connection;
This up-conversion mixer is used for the filtered intermediate-freuqncy signal and second local oscillation signal are carried out becoming in the mixing frequency signal that meets the transmission needs and the multi-circuit combiner of delivering to connection;
This multi-circuit combiner is used for synthesizing and to export to power amplifier from the signal of described communication port generation;
This control circuit links to each other with intelligent monitor system, power switch circuit, first local oscillator and second local oscillator, be used for signal according to intelligent monitor system, control the local oscillation signal that first local oscillator and second local oscillator produce corresponding frequencies, and corresponding communication port is opened or closed to the control power switch circuit.
2. Digital Television frequency-selecting frequency translating transponder as claimed in claim 1 is characterized in that described multi-path power divider is one four road power splitter, is used for radiofrequency signal is divided into four tunnel radiofrequency signals corresponding communication port of each road radiofrequency signal.
3. Digital Television frequency-selecting frequency translating transponder as claimed in claim 1 is characterized in that described control circuit is a cpu control circuit.
4. Digital Television frequency-selecting frequency translating transponder as claimed in claim 1 is characterized in that, also comprises one the 3rd local oscillator, and it links to each other in described frequency-selecting frequency converter, is used to produce an outside local oscillation signal to this frequency-selecting frequency converter.
6. Digital Television frequency-selecting frequency translating transponder as claimed in claim 1, it is characterized in that, described low noise amplifier is one to have that input power detects and the low noise amplifier of automatic electric-level control, and described power amplifier is one to have the power amplifier that power output detects and automatic electric-level is controlled.
7. a frequency-selecting frequency converter that is used for Digital Television frequency-selecting frequency translating transponder is characterized in that, this frequency-selecting frequency converter comprises:
One multi-path power divider;
One multi-circuit combiner;
One control circuit;
At least two communication ports; And
At least two power switch circuits, the corresponding communication port of each power switch circuit is used to control the unlatching of corresponding communication port or close;
Wherein, this multi-path power divider is used for that radiofrequency signal is divided into the multi-channel rf signal and delivers to described communication port;
This communication port comprises a down-conversion mixer, one first local oscillator, an intermediate-frequency filter, one second local oscillator and a up-conversion mixer;
Wherein, this first local oscillator down-conversion mixer of being used to produce first local oscillation signal and delivering to connection;
This down-conversion mixer is used for intermediate-frequency filter that radiofrequency signal and first local oscillation signal are carried out becoming intermediate-freuqncy signal under the mixing and deliver to connection;
This intermediate-frequency filter be used for that intermediate-freuqncy signal carried out Filtering Processing and will handle after intermediate-freuqncy signal deliver to the up-conversion mixer of connection;
The up-conversion mixer that this second local oscillator is used to produce second local oscillation signal and delivers to connection;
This up-conversion mixer is used for the filtered intermediate-freuqncy signal and second local oscillation signal are carried out becoming in the mixing frequency signal that meets the transmission need and the multi-circuit combiner of delivering to connection;
This multi-circuit combiner is used for signal that in the future described communication port produces and synthesizes and export a power amplifier to;
This control circuit links to each other with described power switch circuit, first local oscillator and second local oscillator, be used to control the local oscillation signal of first local oscillator and second local oscillator generation corresponding frequencies, and corresponding communication port is opened or closed to the control power switch circuit.
8. frequency-selecting frequency converter as claimed in claim 7 is characterized in that, described control circuit is a cpu control circuit.
9. Digital Television frequency-selecting frequency translating transponder, comprise a donor antenna, a prime filter, a low noise amplifier, an intelligent monitor system, a modulator-demodulator, a power amplifier, a back grade filter, a power-supply system and a retransmitting antenna, it is characterized in that:
This transponder also comprises a frequency-selecting frequency converter, and it links to each other with low noise amplifier, intelligent monitor system and power amplifier, is used to select the frequency of input signal and it is converted to the frequency of required forwarding;
This intelligent monitor system is controlled the selection control that this frequency-selecting frequency converter carries out input and output frequency point setting and passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201455023U CN201274529Y (en) | 2008-09-11 | 2008-09-11 | Frequency selecting and converting forwarding device for digital television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201455023U CN201274529Y (en) | 2008-09-11 | 2008-09-11 | Frequency selecting and converting forwarding device for digital television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201274529Y true CN201274529Y (en) | 2009-07-15 |
Family
ID=40884867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201455023U Expired - Fee Related CN201274529Y (en) | 2008-09-11 | 2008-09-11 | Frequency selecting and converting forwarding device for digital television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201274529Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835004B (en) * | 2009-12-08 | 2012-09-19 | 三维通信股份有限公司 | Frequency agility system for co-frequency forwarding of digital television |
| CN103018724A (en) * | 2011-09-21 | 2013-04-03 | 中国科学院电子学研究所 | Active transponder for broadband |
| CN104333737A (en) * | 2014-10-28 | 2015-02-04 | 北京大学软件与微电子学院无锡产学研合作教育基地 | Near-distance 2-5 M bandwidth simulative wireless picture transmission system and signal processing method |
| CN104580955A (en) * | 2013-10-11 | 2015-04-29 | 北京同方吉兆科技有限公司 | Multi-channel terrestrial digital television gap filler |
| CN104868928A (en) * | 2014-02-24 | 2015-08-26 | 沈阳中科奥维科技股份有限公司 | Frequency selection device and method based on WIA-PA protocols |
| CN106792137A (en) * | 2016-12-06 | 2017-05-31 | 北京四达时代软件技术股份有限公司 | Set Top Box radio frequency modulation processing method and device |
| CN108880657A (en) * | 2018-06-19 | 2018-11-23 | 中国人民解放军战略支援部队航天工程大学 | A kind of frequency translating transponder for detecing technology based on skill in space base relayed communications enhancing system |
| CN109461298A (en) * | 2018-12-10 | 2019-03-12 | 上海无线电设备研究所 | A kind of untetheredization group-net communication machine in spacecraft |
| CN110635666A (en) * | 2018-06-20 | 2019-12-31 | Abb瑞士股份有限公司 | Frequency converter and method relating to a frequency converter |
-
2008
- 2008-09-11 CN CNU2008201455023U patent/CN201274529Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101835004B (en) * | 2009-12-08 | 2012-09-19 | 三维通信股份有限公司 | Frequency agility system for co-frequency forwarding of digital television |
| CN103018724A (en) * | 2011-09-21 | 2013-04-03 | 中国科学院电子学研究所 | Active transponder for broadband |
| CN103018724B (en) * | 2011-09-21 | 2014-09-17 | 中国科学院电子学研究所 | Active transponder for broadband |
| CN104580955A (en) * | 2013-10-11 | 2015-04-29 | 北京同方吉兆科技有限公司 | Multi-channel terrestrial digital television gap filler |
| CN104868928B (en) * | 2014-02-24 | 2018-01-02 | 沈阳中科奥维科技股份有限公司 | A kind of frequency selective device and method based on WIA PA agreements |
| CN104868928A (en) * | 2014-02-24 | 2015-08-26 | 沈阳中科奥维科技股份有限公司 | Frequency selection device and method based on WIA-PA protocols |
| CN104333737A (en) * | 2014-10-28 | 2015-02-04 | 北京大学软件与微电子学院无锡产学研合作教育基地 | Near-distance 2-5 M bandwidth simulative wireless picture transmission system and signal processing method |
| CN106792137A (en) * | 2016-12-06 | 2017-05-31 | 北京四达时代软件技术股份有限公司 | Set Top Box radio frequency modulation processing method and device |
| CN106792137B (en) * | 2016-12-06 | 2020-06-26 | 北京四达时代软件技术股份有限公司 | Set-top box radio frequency RF modulation processing method and device |
| CN108880657A (en) * | 2018-06-19 | 2018-11-23 | 中国人民解放军战略支援部队航天工程大学 | A kind of frequency translating transponder for detecing technology based on skill in space base relayed communications enhancing system |
| CN108880657B (en) * | 2018-06-19 | 2021-05-07 | 中国人民解放军战略支援部队航天工程大学 | Frequency conversion forwarding device based on technology detection technology in air-based relay communication enhancement system |
| CN110635666A (en) * | 2018-06-20 | 2019-12-31 | Abb瑞士股份有限公司 | Frequency converter and method relating to a frequency converter |
| CN110635666B (en) * | 2018-06-20 | 2022-03-29 | Abb瑞士股份有限公司 | Frequency converter and method relating to a frequency converter |
| CN109461298A (en) * | 2018-12-10 | 2019-03-12 | 上海无线电设备研究所 | A kind of untetheredization group-net communication machine in spacecraft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201274529Y (en) | Frequency selecting and converting forwarding device for digital television | |
| EP1224821B1 (en) | In-building radio-frequency coverage | |
| US7450853B2 (en) | Signal transmission apparatus and method for optical base station | |
| CN101841345B (en) | Time division duplex-remote radio unit | |
| US10644728B2 (en) | Analog processing system for massive-MIMO | |
| US20030185287A1 (en) | Radio relay apparatus | |
| CN101304279A (en) | Radio frequency extension apparatus and base station system | |
| CN101374285B (en) | Operation method for base station common transmit-receive transmission system | |
| CN107863987A (en) | A kind of ultra wide band E band transceivers | |
| CN109274617A (en) | Simultaneous same-frequency full-duplex measurement and control transponder | |
| US20020123306A1 (en) | Channelized booster amplifier for cellular communications | |
| KR101691420B1 (en) | Apparatus for trnasmitting/receiving in wireless communication system | |
| CN201260163Y (en) | Radio frequency extension apparatus and base station system | |
| JPH10303798A (en) | Signal distribution processing method/system | |
| CN102089987B (en) | Communication device, distortion compensation circuit, and distortion compensation method | |
| EP3111583B1 (en) | Method and apparatus for high data rate communication | |
| KR100903207B1 (en) | Integration repeater system for triple band | |
| CN108574497B (en) | Broadband transmission method, device and system with linearization technology | |
| CN215420247U (en) | Digital multi-channel signal far-end frequency conversion device | |
| JP4088513B2 (en) | Millimeter-wave transmission / reception system, transmitter and receiver | |
| CN111181622A (en) | Configurable digital multimedia broadcasting micro wireless repeater | |
| JP2008205564A (en) | Radio relay method, radio equipment and radio relay system | |
| JP4142938B2 (en) | Millimeter-wave transmission / reception system, transmission device, and reception device | |
| JP2006211171A (en) | Relay amplifier | |
| EP2044695A2 (en) | Rf distribution (spreading) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090715 Termination date: 20140911 |
|
| EXPY | Termination of patent right or utility model |