CN104769855A - Signal transmission device applicable to combined distributed antenna systems - Google Patents
Signal transmission device applicable to combined distributed antenna systems Download PDFInfo
- Publication number
- CN104769855A CN104769855A CN201380057532.2A CN201380057532A CN104769855A CN 104769855 A CN104769855 A CN 104769855A CN 201380057532 A CN201380057532 A CN 201380057532A CN 104769855 A CN104769855 A CN 104769855A
- Authority
- CN
- China
- Prior art keywords
- transmitting apparatus
- module
- signal transmitting
- frequency
- antenna
- 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.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The present invention relates to a signal transmission device applicable to combined distributed antenna systems (DASs). According to an embodiment of the present invention, the signal transmission device is connected to an indoor baseband processing unit, which comprises a proximal intermediate frequency module, a plurality of remote radio frequency modules and an intermediate frequency cable connecting the proximal intermediate frequency module and the plurality of remote radio frequency modules. The proximal intermediate frequency module comprises a plurality of digital intermediate frequency processing modules and an intermediate frequency broadband power amplifier, wherein the plurality of digital intermediate frequency processing modules respectively processes each of multi-antenna or multi-technical-standard signals and are combined and connected to the intermediate frequency broadband power amplifier. The plurality of remote radio frequency modules respectively correspond to each of the multi-antenna or multi-technical-standard signals, and each of the plurality of remote radio frequency modules comprises a frequency mixer, a radio frequency power amplifier and an antenna. The present invention uses an intermediate frequency cable to transmit the multi-antenna or multi-technical-standard signals and implement seamless connection to existing DASs, thereby preventing high investments on human and material resources.
Description
Signal transmitting apparatus suitable for merging distributing antenna system
Technical field
The present invention is the signal transmitting apparatus on radio communication, is especially suitable for merging distributing antenna system（DAS, distributed-antenna system) signal transmitting apparatus.
Background technology
Although traditional distributing antenna system is widely used in in-door covering scene, so in view of entering to have more more（MIMO, multiple-input multiple-output) system plurality of advantages, its also turn into in-door covering scene arrange new trend.
It is a MIM0 system and the schematic diagram of the wireless communication system 10 of DAS combination applications shown in Fig. 1.In Fig. 1, time-division Long Term Evolution is met（TD-LTE, Time Divi s ion-Long Term Evolut ion) standard Remote Radio Unit（RRU, Radio Remote Unit) 12 pass through optical fiber 14 and the indoor connection of baseband processing unit (BBU, Bui lding Base band Unit) 16.The Remote Radio Unit 12 has 4 antenna ports, and each antenna further passes through radio-frequency cable（Antenna）It is connected with a DAS system 18.Each DAS system 18 is one by combiner（Combiner) 180, coupler（Coupler) 182 and power splitter（Divider) the passive network of 184 compositions.By taking the first antenna port of Remote Radio Unit 12 as an example, global system for mobile communications/digital communication system/Time Division-Synchronous Code Division Multiple Access that its signal is provided by combiner 180 and information source 11（GSM/DCS/TDS-CDMA, Global System for Mob i le Communicat ions/Digital ce l lular system/Time Divi s ion-Synchronous Code Divi s ion Mult iple Access) etc. after signal combining, power distribution is carried out in each floor and each room by coupler 182, and if need to connect multiple antennas typically carries out power distribution by power splitter 184, so as to provide radio communication service for the grade mobile terminal of mobile phone 13.For other three roads antenna port, according to existing arrangement mode, it is necessary to repeat aforesaid way, corresponding three passages are laid.
As can be seen here, there are shortcomings in the wireless communication system 10 of the combination application, one is because each antenna needs an independent DAS system 18, thus the wireless communication system 10 of the combination application needs many radio-frequency cables；The second is the loss of radio-frequency cable is very serious, particularly in the high frequency band applied, such as high frequency band used in 2. 1G or 2. 3G long evolving systems；The third is traditional DAS system 18 is all singly to enter singly to go out（SIS0, s ingle-input s ingle-output) system, thus such as to combine new mimo system certainly will need to set up or replace substantial amounts of active and passive RF element, and these substantial amounts of deployment engineerings seem more expensive with increasingly high human cost.
In addition, existing many technical standards, the problem of such as LTE, WCDMA, GSM have similar when with DAS combination applications.
Further raising with the technology of mobile communication and market development and user to mobile communication quality requirement, above-mentioned technical problem urgent need to resolve.The content of the invention
An object of the present invention is a kind of signal transmitting apparatus for being suitable to merge DAS in providing, and it can realize multiple antennas or many technical standard systems and DAS combination application, and will not roll up electronic device and the new DAS system of laying.
One embodiment of the invention provides a signal transmitting apparatus for being suitable to merge DAS, the signal transmitting apparatus is connected to indoor baseband processing unit, include the immediate frequency cable of near-end ifd module, multiple far-end RF modules, and a connection near-end ifd module and far-end RF module.The near-end ifd module includes multiple Digital IF Processing modules and an intermediate frequency wideband power amplifer, plurality of Digital IF Processing module handles each in multiple antennas or many technical standard signals respectively, and merges and be connected to the intermediate frequency wideband power amplifer.Multiple far-end RF modules correspond to each in multiple antennas or many technical standard signals respectively, and each in multiple far-end RF modules includes frequency mixer, radio-frequency power amplifier, and antenna.
In one embodiment, the multi-antenna signal is mimo system signal, and many technical standard signals include at least one of LTE, WCDMA, GSM.Near-end ifd module sets or is arranged at BBU sides close to BBU sides.Multiple Digital IF Processing modules in near-end ifd module can be combined, and share the module with general utility functions.In another embodiment, the near-end ifd module through integration is placed in same rack with BBU, and multiple BBU of the multiple technical standards of correspondence are placed in BBU ponds.In another embodiment, near-end ifd module further includes digital modulation module, and it is numerically-controlled oscillator.Wherein multi-antenna signal is merged in an intermediate-frequency channel and modulated to the adjacent different sub-carrier transmission of relaying carrier wave by digital modulation module, and has frequency interval between different sub-carrier；Many technical standard signals are merged in an intermediate-frequency channel and identical relaying carrier-wave transmission are tuned to using specific frequency interval.According to one embodiment of the invention, relaying carrier wave is 200-300MHz.The signal transmitting apparatus can be a Remote Radio Unit.
The signal transmitting apparatus for being suitable to merge DAS of the present invention is divided into near-end ifd module and far-end RF module, an immediate frequency cable is only needed to transmit multiple antennas or many technical standard signals, the slitless connection with existing DAS systems is realized, so as to avoid putting into substantial amounts of man power and material.Because IF carrier frequency is low, therefore cable loss is very low.And the power of intermediate frequency wideband power amplifer is far below common rf broadband power amplifier, and the radio-frequency power amplifier power of far-end RF module is also very small, thus the present invention also have the advantages that it is low in energy consumption.Brief description of the drawings
It is the schematic diagram of a mimo system and the wireless communication system of DAS combination applications shown in Fig. 1；Fig. 2 is the structural representation of the Remote Radio Unit of a multi-standard wireless communication signal；
Frequency band schematic diagrames of the Fig. 3 exemplified with the signal transmission according to an embodiment of the invention for being applied to merge the multiple antennas of distributing antenna system；
Fig. 4 illustrates the frequency band schematic diagram of the signal transmission according to an embodiment of the invention for being applied to merge the multi-standard of distributing antenna system；
Fig. 5 illustrates the structural representation according to an embodiment of the invention for being suitable to merge DAS signal transmitting apparatus；Fig. 6 is exemplified with the structural representation according to an embodiment of the invention for being suitable to merge DAS signal transmitting apparatus；And Fig. 7 is exemplified with the structural representation according to an embodiment of the invention for being suitable to merge DAS signal transmitting apparatus.
Embodiment
Spirit for a better understanding of the present invention, is described further below in conjunction with the part preferred embodiment of the present invention to it.
Distributing antenna system for in-door covering is such as indoor baseband processing unit communication by Remote Radio Unit and signal processing unit.And for many technical standard scenes, it is typically, it is necessary to different indoor baseband processing units and Remote Radio Unit by same operation device simultaneously operating.
Fig. 2 is the structural representation of the Remote Radio Unit 20 of a multi-standard wireless communication signal.As shown in Fig. 2 the different standard of correspondence, such as WCDMA（WCDMA, Wideband Code Divi s ion Mult ipl e Access) there is provided (not shown with different DAS from LTE）Merge the Remote Radio Unit 20 of application.Each Remote Radio Unit 20 mainly includes 3 big modules.One is Digital IF Processing module 22, includes common public radio interface（CPRI, Common Publ ic Radio Interface) processing, Digital Up Convert（DUC, DigitalUp Converter), crest factor decay（CFR, Crest Factor Reduct ion) and digital pre-distortion（DPD, Di gital Pre-di stot ion);Another is small radio-frequency signal processing module 24, includes digital analog converter（DAC, Digital to analog converter), wave filter and frequency mixer etc.；Another is rf board 26, includes power amplifier（PA, Power Ampl ifier) and cavity body filter（FEU, cavity fi l ter).The data signal handled through Digital IF Processing module 22 is further through digital modulation module 28 by numerically-controlled oscillator (Chaos numerical control led osci l lator) realize that digital modulation is then provided to small radio-frequency signal processing module 24, such as DAC.Due to the different technical standard of correspondence, corresponding a plurality of signal transmission passage need to be laid to merge different DAS respectively, more electronic devices will certainly be consumed and huge engineering construction is brought.This aspect can draw high the operation cost of service provider, and then promote the increase of radio communication rate, on the other hand also result in the unnecessary wasting of resources.
The signal transmitting apparatus for being suitable to merge DAS according to embodiments of the present invention can effectively solve the above problems.For the sake of simply understanding, description of the invention is only explained by taking the downlink transmission of the signal transmitting apparatus as an example.
For single standard, single antenna multicarrier system, and in the absence of frequency interval.By taking WCDMA 5MHZ bandwidth, 4 carrier waves as an example, 4 carrier signals of downlink are transmitted in a radio-frequency channel, and the radio-frequency channel is located at the dual-mode antenna and power board of Remote Radio Unit.These signals also pass through identical low-noise amplifier (LNA, Lower Noise Ampl ifier) module in uplink channel.If indoor baseband processing unit is the MIM0 systems of 4 X 4, there are 4 antennas；4 radio-frequency channels are then needed to handle 4 unlike signals on 4 antennas.
Signal transmitting apparatus according to an embodiment of the invention suitable for distributing antenna system, then merge 4 unlike signals in digital intermediate frequency by numerically-controlled oscillator（DIF, Digital Intermdediate Frequency), the numerically-controlled oscillator is modulated to 4 adjacent subcarriers.Because 4 unlike signals merge in an intermediate-frequency channel transmission, it is to avoid set up extra 3 radio-frequency cables of correspondence（Antenna）DAS device expense and numerous and jumbled engineering construction.Frequency band schematic diagrames of the Fig. 3 exemplified with the signal transmission according to an embodiment of the invention for being applied to merge the multiple antennas of distributing antenna system.As shown in figure 3, wherein fIFIt is relaying carrier wave, the frequency interval of setting subcarrier is GAP1, then the shared bandwidth of the WCDMA 5MHz bandwidth, the transmission of the MIM0 signals of 4 X 4 is 20+4 X GAPl.Generally relaying carrier wave is about 200-300MHz, thus it is acceptable to be lost in the frequency band inner cable.
Similar, for many technical standard scenes, the signal transmitting apparatus according to an embodiment of the invention for distributing antenna system then tunes the intermediate-freuqncy signal of merging with specific band separation GAP2, is then transmitted in same passage.That is, in antenna side（Close to terminal user）, intermediate-freuqncy signal, which is filtered and modulated through frequency mixer, interval GAP2 to different carrier frequencies, and between the different carrier frequencies.Fig. 4 illustrates the frequency band schematic diagram of the signal transmission according to an embodiment of the invention for being applied to merge the multi-standard of distributing antenna system, and the multi-standard is LTE-FDD and WCDMA.It is assumed that LTE-FDD systems transmission is 20MHz bandwidth single antenna signals, WCDMA system transmission is 5MHz bandwidth, the MIM0 signals of 4 X 4.As shown in figure 4, wherein fIFIt is the GAP2 of the frequency interval between relaying carrier wave, the signal of two various criterions, it is 40+GAP2 that the LTE-FDD transmits shared bandwidth with WCDMA standard signals.Choosing for GAP1 and GAP2 can be by index request of the those skilled in the art according to whole system, parts selection, and compromise of performance etc. is obtained through experiment, where the emphasis of non-invention, therefore is not repeated.It is similar, because the signal of various criterion merges in an intermediate-frequency channel transmission, it is to avoid set up extra electronic device, such as it is used to newly set DAS device expense and numerous and jumbled engineering construction.
Fig. 5 illustrates the structural representation according to an embodiment of the invention for being suitable to merge DAS signal transmitting apparatus 50.As shown in Figure 5, the signal transmitting apparatus 50 can be a Remote Radio Unit redefined, multiple far-end RF modules 54 comprising a near-end ifd module 52 and each antenna of correspondence or technical standard signal, the near-end ifd module 52 links together with multiple far-end RF modules 54 by immediate frequency cable 56.
The near-end ifd module 52 closes on or is incorporated into indoor baseband processing unit (not shown) side, main to include each day of correspondence
The wideband power amplifer 522 of the Digital IF Processing module 520 and each antenna port of merging or technical standard signal of line or technical standard signal.Each Digital IF Processing module 520 can be a common structure, comprising CPRI, DUC, CFR, and with DPD etc..The signal handled through Digital IF Processing module 520 further carries out digital modulation, is such as realized using NCO.Then the signal after digital modulation provides to DAC and carries out digital-to-analogue conversion.In certain embodiments, analog intermediate frequency is can be without, digital RF transmitting is directly carried out without carrying out digital-to-analogue conversion.A series of intercarrier signal of multi-antenna signal or many technical standards after processing is incorporated into an intermediate frequency wideband power amplifer 522 and transmitted in an immediate frequency cable 56.Compared to the rf broadband power amplifier of the radio frequency part of traditional Remote Radio Unit, carrier wave is relayed because multiple antennas and many technical standard signals are incorporated into identical by the intermediate frequency wideband power amplifer 522 in intermediate frequency phase, bandwidth simultaneously need not be wide like that to rf broadband power amplifier, and power is also below rf broadband power amplifier.By taking 60dB rf broadband power amplifier as an example, intermediate frequency wideband power amplifer 522 of the invention can be 40dB.
Each far-end RF module 54 is close to terminal user（It is not shown）Set, be connected by immediate frequency cable 56 with near-end ifd module 52.Each far-end RF module 54 mainly includes frequency mixer 540, radio-frequency power amplifier 542, cavity body filter 544, and antenna 548.In the present embodiment, intermediate-freuqncy signal filtered device 546 filtering is mixed into frequency mixer 540, and after filter to transmit by corresponding antenna 548 through cavity body filter 544.To the different distance between different technical standards, and near-end ifd module 52 and far-end RF module 54, the power of the radio-frequency power amplifier 542 of 54 far-end RF modules is different, but all very low.Correspondence WCDMA and LTE standard can be 8dB and 6dB respectively in the present embodiment.It is clear that being far below common Remote Radio Unit according to the power of the Remote Radio Unit 50 of the present invention.
It is pointed out that development and the frequent updating of standard due to technology, the part with identical function often have multiple different addresses, such as Remote Radio Unit and long distance wireless dateline（RRH, Remote Radio Head) often it is used alternately.Technical term used in present patent application book is that the function that Ying Yiqi is known together in the art is defined, and only can not arbitrarily be understood with the similarities and differences of title to explain and demonstrate technical scheme.
In other embodiments, the near-end ifd module 52 further can combine the part of module with identical function of correspondence different antennae or technical standard, share module such as clock, power model etc. with general utility functions.Fig. 6 is exemplified with the structural representation according to an embodiment of the invention for being suitable to merge DAS signal transmitting apparatus 60.As shown in Fig. 6, the signal transmitting apparatus 60 can be a Remote Radio Unit, with identical far-end RF module 64 in Fig. 5, unlike near-end ifd module 62.In the near-end ifd module 62, functional module such as Digital IF Processing module 620, digital modulation module 624, digital analog converter 626 etc. of correspondence different antennae or technical standard are combined, and this needs bigger field programmable gate array（FPGA, Field- ProgrammableGateArray) it can realize, and required digital analog converter 626 also needs bigger sample rate.With the development of electronic technology, the requirements at the higher level of these performances and parameter to hardware and software can't bring how many difficulty, but the resource saved of near-end ifd module 62 and cost of the integration attract people's attention really.
According to other embodiments of the present invention, the near-end ifd module 62 of the integration further can be arranged in same rack 102 with indoor baseband processing unit.Fig. 7 is exemplified with the structural representation according to an embodiment of the invention for being suitable to merge DAS signal transmitting apparatus 70, and it uses multi-standard, 4 X 4MIMO systems.As shown in fig. 7, the indoor baseband processing unit of various criterion, such as LTE, WCDMA, GSM is arranged in BBU ponds (pool) 700, the near-end ifd module 62 of integration is connected and is arranged in same rack 702 with the BBU ponds 700.4 antennas of correspondence MIM0 systems, it is respectively arranged with the far-end RF module 64 of 3 different technologies standards of correspondence, antenna port for wherein needing further to connect multiple antennas, power distribution is carried out by separator (splitter) 66.Because the operational frequency bandwidth of tri- different technologies standards of LTE, WCDMA, GSM has very big difference, common indoor arrangement need to set 3 independent systems can respectively；And the present invention then only needs one.
In summary, the present invention only needs an immediate frequency cable to transmit multiple antennas or many technical standard signals, and the immediate frequency cable can be twisted-pair feeder, 5 class lines or optical fiber, with specific reference to the ambient As to be arranged.Because IF carrier frequency is low, about 200-300MHZ, therefore cable loss is very low.On the other hand, the power of intermediate frequency wideband power amplifer is far below common rf broadband power amplifier, and the radio-frequency power amplifier power of far-end RF module is also very small, thus the overall institute's wasted work rate of the present invention is still below common Remote Radio Unit.Moreover, in the present invention, low-noise amplifier is positioned at far-end RF module, close to antenna, and the system noise factor of up-link is low, therefore uplink performance is better than existing homogeneous system or device.
The technology contents and technical characterstic of the present invention have revealed that as above, but those skilled in the art are still potentially based on teachings of the present invention and announcement and make a variety of replacements and modification without departing substantially from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to the content disclosed in embodiment, and should include various replacements and modification without departing substantially from the present invention, and be covered by present patent application claims.
Claims (12)
- Claims1st, a kind of signal transmitting apparatus, suitable for merging distributing antenna system (DAS, distributed-antenna system);The signal transmitting apparatus is connected to indoor baseband processing unit（BBU, Building Base band Unit), comprising：Near-end ifd module, includes multiple Digital IF Processing modules and an intermediate frequency wideband power amplifer；Wherein the multiple Digital IF Processing module handles each in multiple antennas or many technical standard signals respectively, and merges and be connected to the intermediate frequency wideband power amplifer；One immediate frequency cable, connects the near-end ifd module；AndMultiple far-end RF modules, correspond to each in multiple antennas or many technical standard signals and are connected to the immediate frequency cable respectively；Each in the multiple far-end RF module includes frequency mixer, radio-frequency power amplifier, and antenna.2nd, the signal transmitting apparatus as shown in claim 1, wherein the multi-antenna signal is mimo system signal, many technical standard signals include at least one of LTE, WCDMA, GSM.3rd, the signal transmitting apparatus as shown in claim 1, wherein the near-end ifd module sets or be arranged at the BBU sides close to the BBU sides.4th, the signal transmitting apparatus as shown in claim 1, wherein the multiple Digital IF Processing in the near-end ifd module is module integrated together, shares the module with general utility functions.5th, the signal transmitting apparatus as shown in claim 4, wherein the near-end ifd module through integration is placed in same rack with the BBU.6th, the signal transmitting apparatus as shown in claim 1, wherein the near-end ifd module further includes digital modulation module.7th, the signal transmitting apparatus as shown in claim 6, the multi-antenna signal is merged in an intermediate-frequency channel and modulated to the adjacent different sub-carrier transmission of relaying carrier wave by wherein described digital modulation module, and has frequency interval between the different sub-carrier.8th, the signal transmitting apparatus as shown in claim 6, wherein the digital modulation module is by many technical standards Signal merges in an intermediate-frequency channel and is tuned to identical relaying carrier-wave transmission using specific frequency interval.9th, the signal transmitting apparatus as shown in claim 7 or 8, wherein the relaying carrier wave is 200-300MHz.10th, the signal transmitting apparatus as shown in claim 6, wherein the digital modulation module is numerically-controlled oscillator.11st, the signal transmitting apparatus as shown in claim 1, it is a Remote Radio Unit.12nd, signal transmitting apparatus as stated in claim 5, wherein the multiple BBU for corresponding to the multiple technical standard are placed in BBU ponds.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/000682 WO2014194442A1 (en) | 2013-06-07 | 2013-06-07 | Signal transmission device applicable to combined distributed antenna systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104769855A true CN104769855A (en) | 2015-07-08 |
| CN104769855B CN104769855B (en) | 2018-10-30 |
Family
ID=52007375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380057532.2A Active CN104769855B (en) | 2013-06-07 | 2013-06-07 | Suitable for merging the signal transmitting apparatus of distributing antenna system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104769855B (en) |
| WO (1) | WO2014194442A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106034364A (en) * | 2015-03-12 | 2016-10-19 | 上海贝尔股份有限公司 | Central baseband processing unit for indoor communication system and network architecture |
| CN107404331A (en) * | 2016-05-13 | 2017-11-28 | 恩智浦美国有限公司 | The method and apparatus for handling digital composite signal |
| CN108377161A (en) * | 2017-02-01 | 2018-08-07 | 霍鸣 | Distributed phased array multiple-input, multiple-output for next-generation wireless user equipment hardware design and method |
| CN109818665A (en) * | 2017-11-17 | 2019-05-28 | 上海金阵半导体科技有限公司 | Wireless signal expansion system and wireless signal extension head end and terminal |
| WO2019149267A1 (en) * | 2018-02-02 | 2019-08-08 | 中兴通讯股份有限公司 | Uplink carrier transmission method and apparatus, and uplink carrier aggregation apparatus |
| CN113541742A (en) * | 2021-07-07 | 2021-10-22 | 贵州振华天通设备有限公司 | Frequency division multi-stream radio frequency distribution system and signal transmission method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108833017B (en) * | 2018-07-03 | 2020-03-24 | 京信通信系统（中国）有限公司 | Single-system repeater system and signal compatibility method and device thereof |
| CN111818544A (en) * | 2020-06-08 | 2020-10-23 | 中国电信集团工会上海市委员会 | Digital active system for improving coverage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232653A (en) * | 2007-01-22 | 2008-07-30 | 中兴通讯股份有限公司 | Radio frequency zoom out system based on number intermediate frequency transmission |
| CN101316105A (en) * | 2008-06-11 | 2008-12-03 | 苏州中科半导体集成技术研发中心有限公司 | Multi-standard multi-module wireless transceiver |
| CN102098688A (en) * | 2009-12-09 | 2011-06-15 | 中国移动通信集团公司 | Method, system and device for realizing MIMO (multiple input multiple output) of indoor distribution system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2363905B1 (en) * | 2009-09-18 | 2012-06-22 | Vodafone España, S.A.U. | DIVERSITY OF MULTIPORT TRANSMISSION IN UTRAN FOR HSDPA. |
| JP5993005B2 (en) * | 2011-07-08 | 2016-09-14 | ゼットティーイー コーポレイション | Method and system for wireless transmission of analog signal between antenna and baseband processor |
-
2013
- 2013-06-07 WO PCT/CN2013/000682 patent/WO2014194442A1/en active Application Filing
- 2013-06-07 CN CN201380057532.2A patent/CN104769855B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232653A (en) * | 2007-01-22 | 2008-07-30 | 中兴通讯股份有限公司 | Radio frequency zoom out system based on number intermediate frequency transmission |
| CN101316105A (en) * | 2008-06-11 | 2008-12-03 | 苏州中科半导体集成技术研发中心有限公司 | Multi-standard multi-module wireless transceiver |
| CN102098688A (en) * | 2009-12-09 | 2011-06-15 | 中国移动通信集团公司 | Method, system and device for realizing MIMO (multiple input multiple output) of indoor distribution system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106034364A (en) * | 2015-03-12 | 2016-10-19 | 上海贝尔股份有限公司 | Central baseband processing unit for indoor communication system and network architecture |
| CN106034364B (en) * | 2015-03-12 | 2019-10-11 | 上海诺基亚贝尔股份有限公司 | Central baseband processing unit and the network architecture for indoor communication system |
| CN107404331A (en) * | 2016-05-13 | 2017-11-28 | 恩智浦美国有限公司 | The method and apparatus for handling digital composite signal |
| CN107404331B (en) * | 2016-05-13 | 2021-02-05 | 恩智浦美国有限公司 | Method and apparatus for processing digital composite signal |
| CN108377161A (en) * | 2017-02-01 | 2018-08-07 | 霍鸣 | Distributed phased array multiple-input, multiple-output for next-generation wireless user equipment hardware design and method |
| CN108377161B (en) * | 2017-02-01 | 2021-12-21 | 霍一鸣 | Distributed phased array MIMO for next generation wireless user equipment hardware design and method |
| CN109818665A (en) * | 2017-11-17 | 2019-05-28 | 上海金阵半导体科技有限公司 | Wireless signal expansion system and wireless signal extension head end and terminal |
| CN109818665B (en) * | 2017-11-17 | 2022-03-18 | 上海金阵半导体科技有限公司 | Wireless signal extension system, wireless signal extension head end and terminal |
| WO2019149267A1 (en) * | 2018-02-02 | 2019-08-08 | 中兴通讯股份有限公司 | Uplink carrier transmission method and apparatus, and uplink carrier aggregation apparatus |
| CN113541742A (en) * | 2021-07-07 | 2021-10-22 | 贵州振华天通设备有限公司 | Frequency division multi-stream radio frequency distribution system and signal transmission method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104769855B (en) | 2018-10-30 |
| WO2014194442A1 (en) | 2014-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104769855B (en) | Suitable for merging the signal transmitting apparatus of distributing antenna system | |
| US11283473B2 (en) | Radio frequency front-end circuit, circuit board thereof and terminal | |
| CN101877917B (en) | Remote radio unit | |
| US8515495B2 (en) | MIMO communication system | |
| CN101026386A (en) | Base station, mobile terminal and method for comprehensive using paired and nonpaired spectrum | |
| CN102208940A (en) | Radio frequency system | |
| CN110380754A (en) | A kind of double frequency time division signal transmitting-receiving amplifier | |
| CN204013568U (en) | The multi-carrier communication apparatus of tdd mode mimo wireless communication system | |
| CN102882573A (en) | Multiple-input multiple-output signal transmission realization method, device and system | |
| CN204013601U (en) | A kind of multi-carrier communication apparatus of tdd mode mimo wireless communication system | |
| EP2086244A1 (en) | Signal combination method, device and system having different system, same band and antenna sharing | |
| CN108933609A (en) | TDD/FDD configurable device, method, radio-frequency module and communication equipment | |
| CN203243526U (en) | Indoor coverage accessing device and indoor coverage system | |
| CN210157391U (en) | Distributed 5G gNB base station based on coaxial distribution network | |
| WO2018001029A1 (en) | Remote radio unit and remote massive multiple-input multiple-output radio unit | |
| WO2016123751A1 (en) | Distributed base station and signal transmission method | |
| CN105871410B (en) | A kind of carrier wave polymerization CA radio circuit and mobile terminal | |
| CN108886399A (en) | A kind of active antenna system, base station and communication system | |
| CN205566653U (en) | Indoor distribution system | |
| EP2733976A1 (en) | System, device, and method for transmitting multi-input-multi-output signals | |
| CN102457316A (en) | System for carrying out multi-antenna transmission by utilizing indoor wireless signal coverage system and method thereof | |
| CN201556711U (en) | Wideband smart antenna | |
| CN101662779A (en) | Repeater and method for processing multi-standard type mobile communication signal by utilizing repeater | |
| CN204559569U (en) | Active distributed antenna system and relaying terminal thereof | |
| CN203027505U (en) | MiFi and wireless relay dual-mode device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201206 Pudong New Area, Nanjing Road, No. 388, Shanghai Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Pudong New Area, Nanjing Road, No. 388, Shanghai Applicant before: Shanghai Alcatel-Lucent Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |