CN108712243A - A kind of multiple carrier channel method for reconstructing towards carrier aggregation system - Google Patents
A kind of multiple carrier channel method for reconstructing towards carrier aggregation system Download PDFInfo
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- CN108712243A CN108712243A CN201810489403.5A CN201810489403A CN108712243A CN 108712243 A CN108712243 A CN 108712243A CN 201810489403 A CN201810489403 A CN 201810489403A CN 108712243 A CN108712243 A CN 108712243A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a kind of multiple carrier channel method for reconstructing towards carrier aggregation system, including：User equipment sends pilot tone on main carrier, and base station estimates the B class channel state informations of A classes channel state information and main carrier using the main carrier pilot tone received, and main carrier channel is obtained to rebuild；User equipment sends sparse pilot tone on the 1st to n-th upstream auxiliary carriers, and base station estimates the B class channel state informations of each secondary carrier according to the sparse pilot tone and A class channel state informations of each secondary carrier received；Base station rebuilds each secondary carrier channel according to the B class channel state informations of the A classes channel state information and each secondary carrier estimated.The present invention realizes the channel reconstructing on multicarrier with less pilot tone, overcomes extensive multi-input multi-output system CSI and obtains the excessive problem of expense.
Description
Technical field
The present invention relates to a kind of multiple carrier channel method for reconstructing towards carrier aggregation system belongs to wireless communication technique neck
Domain.
Background technology
From forth generation mobile communication, carrier aggregation technology becomes the effective means for polymerizeing big bandwidth, promoting spectrum efficiency,
By the way that multiple member carriers continuously or discontinuously are used in combination, the highway of mobile communication transmission is exponentially widened, has been protected
The dynamic high-efficiency for having demonstrate,proved frequency spectrum resource utilizes.In the 5th third-generation mobile communication Standardization, even more allow single member carrier wave
Using 100,000,000 or more bandwidths, multiple carrier waves are polymerize by carrier aggregation technology, form super large bandwidth, fundamentally ensures that channel holds
Thousand times of promotions of amount.
To meet the Very-High-Data-Rate demand in the 5th generation and future mobile communication system, extensive MIMO technology is extensive
Using.By configuring large-scale antenna array in base station, the spatial resolution of wireless transmission is increased dramatically, and base station can not only
Single user direction is enough precisely aligned, identical running time-frequency resource can also be utilized to service multiple users, be multiplied space division multiplexing
Dimension improves mobile communication system handling capacity.To obtain higher-dimension channel state information (CSI), different antennae port needs to use
Orthogonal pilot tone is distinguished with showing, however is limited by running time-frequency resource network and coherence time, correlation bandwidth, can not be designed a large amount of
Completely orthogonal pilot tone, therefore extensive mimo system makes CSI estimated accuracies be damaged often using pilot frequency multiplexing by the way of.
Moreover, the complex channel matrix of higher-dimension needs the running time-frequency resource for expending considerable scale to be fed back, and feedback overhead is huge, invades
Data transmission resources are accounted for, can not be born in systems in practice.If simultaneously use carrier aggregation technology, pilot tone and feedback overhead with
It is linearly increasing carrier number.Therefore, CSI acquisition become use carrier aggregation technology extensive mimo system problem it
One.
It is obtained for the CSI of the extensive mimo system of single carrier, industry has been unfolded to study extensively, and is directed to the big rule of multicarrier
The research of mould mimo system is more rare.The CSI of the extensive mimo system of multicarrier obtains problem can be with analogy frequency division duplex
(FDD) CSI of the extensive mimo system of single carrier is obtained.For the latter, strategy widely used at present is broadly divided into two kinds：
(1) to being trained by code book, user equipment is estimated and feeds back CSI；(2) space reciprocity is utilized, is pushed away using uplink CSI
Downlink CSI is led, such as obtains channel correlation matrix and is used for downlink transfer, this method needs larger expense, acquisition of information difficult
It is bad to spend larger and downlink transfer performance.The another gain for having result of study to propose uplink and downlink propagation path, deflection and time delay are complete
It is complete equal, down channel only can be directly reconstructed using uplink estimated result, without downlink training process, however reality is believed
Road measurement result shows that the down channel reconstructed results error trained without downlink is larger, can not meet the need of real system
It asks.
In conclusion for the extensive mimo system using carrier aggregation technology, the overhead as how smaller obtains
It takes the CSI with high availability, rebuilds multiple carrier channel, became for the 5th generation and difficulty that future mobile communication system is urgently broken through
Topic.
Invention content
It is a kind of towards carrier wave polymerization system technical problem to be solved by the present invention lies in overcoming the deficiencies of the prior art and provide
The multiple carrier channel method for reconstructing of system breaches carrier wave and polymerize the bottleneck that extensive mimo system multicarrier CSI is obtained, utilizes letter
The frequency independence of road spatial parameter realizes that carrier wave polymerize extensive mimo system with smaller pilot-frequency expense and feedback overhead
Multiple carrier channel rebuild, while ensure that rebuild channel availability.
The present invention specifically uses following technical scheme to solve above-mentioned technical problem：
A kind of multiple carrier channel method for reconstructing towards carrier aggregation system, includes the following steps：
Step 1, user equipment send ascending pilot frequency on main carrier, and base station utilizes the main carrier ascending pilot frequency received,
The uplink B class channel state informations of A classes channel state information and main carrier are estimated, and rebuild main carrier up channel and root
Main carrier down channel is rebuild according to the duplex mode that main carrier uses, main carrier channel is obtained to rebuild；
Step 2, user equipment send the sparse pilot tone of uplink on the 1st to n-th secondary carrier, and base station is each according to what is received
The sparse pilot tone of uplink and A class channel state informations of secondary carrier estimate the uplink B class channel state informations of each secondary carrier,
And is estimated according to the duplex mode that each secondary carrier uses and feed back the downlink B class channel state informations of each secondary carrier；
Step 3, base station according to the uplink B class channel state informations of the A classes channel state information and each secondary carrier estimated,
Rebuild each secondary carrier up channel；And the downlink B class channel status of the duplex mode and secondary carrier used according to each secondary carrier is believed
Breath rebuilds each secondary carrier down channel, and each secondary carrier channel is obtained to rebuild.
Further, as a preferred technical solution of the present invention：A classes channel state information includes in the step 1
The deflection and time delay of every propagation path.
Further, as a preferred technical solution of the present invention：Each B classes channel state information includes in the method
The gain of every propagation path.
Further, as a preferred technical solution of the present invention：The duplex mode that main carrier uses in the step 1
Including Time Division Duplex TDD and Frequency Division Duplex FDD.
Further, as a preferred technical solution of the present invention, the duplex that is used according to main carrier in the step 1
Mode rebuilds main carrier down channel, specially：
When main carrier uses Time Division Duplex TDD mode, main carrier up channel progress transposition will be rebuild and obtain main carrier
Down channel；
When main carrier uses Frequency Division Duplex FDD mode, base station sends the sparse pilot tone of downlink of main carrier, is assigned by wave beam
Shape adjusts in pilot tone direction to the direction of each path estimated by main carrier uplink；User equipment is based on A class channel status
The downlink B class channel state informations of main carrier are estimated and fed back to information and the sparse pilot tone of the downlink of main carrier；Base station is according to A classes
The downlink B class channel state informations of channel state information and main carrier rebuild main carrier down channel.
Further, as a preferred technical solution of the present invention：The duplex mode that secondary carrier uses in the step 2
Including Time Division Duplex TDD and Frequency Division Duplex FDD.
Further, as a preferred technical solution of the present invention：Pair used according to each secondary carrier in the step 2
Work mode estimates and feeds back the downlink B class channel state informations of each secondary carrier, specially：
When secondary carrier uses Time Division Duplex TDD mode, the uplink B class channel state informations of the secondary carrier are downlink B
Class channel state information, without in addition estimating and feeding back the downlink B class channel state informations of the secondary carrier；
When secondary carrier uses Frequency Division Duplex FDD mode, base station sends the sparse pilot tone of downlink of the secondary carrier, passes through wave beam
Figuration adjusts in pilot tone direction to the direction of each path estimated by main carrier uplink；User equipment is based on A class channel shapes
The downlink B class channel state informations of the secondary carrier are estimated and fed back to the sparse pilot tone of downlink of state information and the secondary carrier.
The present invention uses above-mentioned technical proposal, can have the following technical effects：
The present invention estimates channel state information CSI using the pilot tone on main carrier PSC, including one or more propagates road
Gain of the time delay, deflection and every propagation path of diameter on PSC is rebuild PSC channels, is then sent out on secondary carrier SSC
Sparse pilot tone is sent, using the sparse pilot tone in the time delay and deflection and SSC of every propagation path estimated on PSC, is estimated
Gain of the every propagation path on SSC is counted, finally the time delay and deflection of every propagation path estimated by PSC,
And gain of the every propagation path of estimation on SSC, rebuild SSC channels.The invention provides more for carrier aggregation system
Carrier channel method for reconstructing especially overcomes extensive multi-input multi-output system CSI and obtains the excessive problem of expense.Therefore,
The advantages of present invention has is as follows：
1) the method for the present invention is utilized using the time delay of channel space parameter such as propagation path, the frequency independence of deflection
After the above-mentioned spatial parameter of PSC pilot frequency acquisitions, it is only necessary to send a small amount of pilot tone, increasing of the every propagation path of estimation in SSC on SSC
Benefit, you can carry out SSC channel reconstructings, effectively reduce pilot tone and feedback overhead, solve carrier wave and polymerize extensive mimo system
The problem that CSI is obtained.
2) the method for the present invention, using a small amount of SSC training and feedback resources, has modified on SSC after estimating PSC-CSI
Gain, ensure that carrier wave polymerize the correctness that extensive mimo system multiple carrier channel is rebuild, greatly improve reconstruction channel
Availability.
Description of the drawings
Fig. 1 is the flow diagram of the multiple carrier channel method for reconstructing of the invention towards carrier aggregation system.
Specific implementation mode
Embodiments of the present invention are described with reference to the accompanying drawings of the specification.
As shown in Figure 1, the present invention provides a kind of multiple carrier channel method for reconstructing towards carrier aggregation system, load is used
In the wireless transmitting system of wave polymerization technique, after channel state information CSI is estimated on main carrier PSC and rebuilds PSC channels,
Estimated by sending sparse pilot tone on the 1st to n-th secondary carrier SSC using the frequency independence of A classes CSI, that is, CSI-A
SSC1,…,SSCNOn B class CSI, that is, CSI-B, utilize the CSI-A estimated, SSC1-CSI-B,…,SSCN- CSI-B is rebuild
SSC1,…,SSCNChannel.The base station of this method can be that multiple user equipmenies rebuild multiple carrier channel, specifically include following step
Suddenly：
Step 1 sends pilot tone on main carrier PSC, and A class channel state information CSI-A and master are estimated using PSC pilot tones
The uplink B class channel state information PSC-CSI-B of carrier wave, and rebuild PSC channels.Wherein, main carrier PSC is specifically included on one
Row PSC and a downlink PSC, the duplex mode that main carrier PSC may be used include Time Division Duplex TDD and Frequency Division Duplex FDD side
Formula, when selecting TDD modes, uplink PSC is downlink PSC, and the carrier frequency of the two is identical, when selecting FDD modes, uplink
PSC is different from downlink PSC, and the carrier frequency of the two is different.Also, A class channel state informations CSI-A is unrelated with carrier frequency,
Do not change with the variation of carrier frequency, CSI-A includes the deflection and time delay of every propagation path；B class channel state informations
CSI-B is related with carrier frequency, changes with the variation of carrier frequency, the uplink and downlink B class channel shapes of main carrier in the present invention
State information CSI-B may each comprise the gain of every propagation path.
The process sends ascending pilot frequency by user equipment on main carrier PSC, and base station is using on the main carrier PSC received
Row pilot tone estimates the uplink B class channel state information PSC-CSI-B of A class channel state information CSI-A and main carrier, lays equal stress on
Main carrier PSC up channels are built, and main carrier down channel is rebuild according to the duplex mode that main carrier uses, are led with rebuilding
Carrier wave PSC channels；
Wherein, main carrier down channel is rebuild according to the duplex mode that main carrier uses, specially：
When main carrier PSC uses Time Division Duplex TDD mode, according to reciprocity, uplink PSC-CSI-B is downlink PSC-
PSC up channels are carried out transposition by CSI-B at this time, you can rebuild main carrier PSC down channels；
When main carrier PSC uses Frequency Division Duplex FDD mode, uplink PSC-CSI-B is not equal to downlink PSC-CSI-B, this
Shi Jizhan sends the sparse pilot tone of main carrier PSC downlinks, is adjusted in pilot tone direction to every estimated by PSC uplinks by wave beam forming
On the direction of paths, the pilot tones of corresponding different directions is to be time-multiplexed or the direction of frequency division multiplexing distinguishes, Yong Hushe
It is standby to be based on A class channel state information CSI-A and the sparse pilot tone of main carrier PSC downlinks, estimate and feed back the downlink B classes letter of main carrier
Channel state information PSC-CSI-B, base station are rebuild according to the downlink B class channel state information PSC-CSI-B of CSI-A and main carrier
Main carrier PSC down channels.
Step 2, user equipment are the 1st to n-th secondary carrier SSC1,…,SSCNThe sparse pilot tone of upper transmission uplink utilizes
SSC1,…,SSCNSparse pilot tone and the A class channel state information CSI-A estimated, estimate the uplink B class channels of each secondary carrier
Status information SSC1-CSI-B,…,SSCN-CSI-B.Wherein, for secondary carrier SSCj, the j=1 ..., N, SSCjSpecific packet
Include a upstream auxiliary carriers SSCjWith a downlink secondary carrier SSCj, secondary carrier SSCjThe duplex mode that may be used include TDD and
FDD, when selecting TDD modes, upstream auxiliary carriers SSCjAs downlink secondary carrier SSCj, the carrier frequency of the two is identical, works as selection
When FDD modes, upstream auxiliary carriers SSCjDifferent from downlink secondary carrier SSCj, the carrier frequency difference of the two.
The process is by user equipment the 1st to n-th secondary carrier SSC1,…,SSCNThe sparse pilot tone of upper transmission uplink, base station
According to the SSC receivedjThe sparse pilot tone of uplink and A class channel state information CSI-A, estimate the uplink B classes of each secondary carrier
Channel state information SSCj- CSI-B, wherein the uplink and downlink B classes channel state information of each auxiliary wave also may each comprise often in the present invention
The gain of propagation path.Also, is estimated according to the duplex mode that each secondary carrier uses and the downlink B classes for feeding back each secondary carrier are believed
Channel state information：As a certain secondary carrier SSCjWhen using Time Division Duplex TDD mode, the uplink B class channel status of the secondary carrier is believed
Breath is downlink B class channel state informations, without in addition estimating and feeding back the downlink B class channel state informations of the secondary carrier.When
A certain secondary carrier SSCjUsing FDD duplex modes, then base station is in secondary carrier SSCjThe sparse pilot tone of upper transmission downlink, is assigned by wave beam
Shape adjusts in pilot tone direction to the direction of each path estimated by PSC uplinks, and the pilot tone of corresponding different directions is multiple with the time-division
With or the direction of frequency division multiplexing distinguish, user equipment is based on CSI-A and SSCjThe sparse pilot tone of downlink is estimated and is fed back each
The downlink B class channel state informations SSC of secondary carrierj-CSI-B。
Step 3, base station are according to the uplink B class channel status of the A class channel state information CSI-A and each secondary carrier estimated
Information rebuilds each secondary carrier SSCjUp channel；And the downlink B classes of the duplex mode and secondary carrier used according to each secondary carrier are believed
Channel state information rebuilds each secondary carrier SSCjDown channel obtains each secondary carrier channel to rebuild.
Therefore, the CSI-A estimated, the uplink and downlink B class channel state informations SSC of each secondary carrier are utilized1-CSI-B,…,
SSCN- CSI-B rebuilds SSC1,…,SSCNChannel.Wherein, for SSCj, j=1 ..., N, base station is based on CSI-A and uplink
SSCj- CSI-B rebuilds SSCjUp channel, if SSCjUsing TDD duplex modes, according to reciprocity, uplink SSCj- CSI-B is
For downlink SSCj- CSI-B, at this time by SSCjUp channel carries out transposition, you can rebuilds SSCjDown channel；If SSCjUsing FDD
Duplex mode, uplink SSCj- CSI-B is not equal to downlink SSCj- CSI-B, the downlink that base station is obtained according to CSI-A and feedback at this time
SSCj- CSI-B rebuilds secondary carrier SSCjDown channel finally obtains each secondary carrier SSC to rebuild1,…,SSCNChannel.
Also, in the method for the present invention, base station can be that multiple user equipmenies rebuild multiple carrier channel, different user devices
The differentiation mode of corresponding sparse pilot tone includes：(1) frequency division multiplexing；(2) it is time-multiplexed.
It is rebuild in order to which the method for verifying the present invention can provide multiple carrier channel for carrier aggregation system, below by tool
Body embodiment is further elaborated technical scheme of the present invention：
It polymerize in extensive mimo system in carrier wave, antenna for base station number is M, and magnitude is usually 102、103, user equipment adopts
It is configured with single antenna, the uplink and downlink carrier frequency of main carrier PSC is respectivelySecondary carrier SSCjUplink and downlink
Carrier frequency is respectivelyWherein j=1 ..., N, N are carrier number.The present embodiment will be to main carrier PSC and secondary carrier
SSCjUplink and down channel rebuild, include the following steps：
Step 1：User equipment sends uplink detection signal on PSC, and base station is believed according to the PSC uplink detections received
Number, the uplink B class channel state informations PSC-CSI-B of A class channel state information CSI-A and main carrier is estimated, wherein
CSI-A includes the delay, τ of every propagation pathlWith deflection θl, wherein l=1 ..., L, L are propagation path number, main carrier
Uplink B class channel state informations PSC-CSI-B includes gain of the every propagation path on uplink PSCL=1 ...,
L, then rebuilding PSC up channels is：
Wherein a () responds for base-station antenna array, if main carrier PSC uses TDD duplex modes, according to channel reciprocity
Property, rebuilding PSC down channels is：
If main carrier PSC uses FDD duplex modes, base station sends the sparse pilot tone of downlink, and will be led by wave beam forming
Frequency direction is adjusted to the direction of each path estimated by uplink PSC, the pilot tones of corresponding different directions to be time-multiplexed or
The direction of frequency division multiplexing distinguishes, and user equipment is based on τl、θlWith the sparse pilot tone of PSC downlinks, downlink PSC-CSI-B is estimated, i.e.,L=1 ..., L, and base station is fed back to, then reconstruction PSC down channels in base station are：
Step 2：For secondary carrier SSCj, j=1 ..., N, user equipment is in uplink SSCjThe sparse pilot tone of upper transmission uplink,
Base station is according to the SSC receivedjThe sparse pilot tone of uplink estimates the uplink B class channel state informations SSC of each secondary carrierj-CSI-
B, i.e.,L=1 ..., L, if SSCjUsing FDD duplex modes, then base station is in downlink SSCjThe sparse pilot tone of upper transmission downlink,
Pilot tone direction is adjusted to the direction of each path estimated by uplink PSC by wave beam forming, corresponding different directions are led
For frequency to be time-multiplexed or the direction of frequency division multiplexing distinguishes, user equipment is based on CSI-A and SSCjThe sparse pilot tone of downlink, estimates
Count downlink SSCj- CSI-B, i.e.,L=1 ..., L, and fed back to base station；
Step 3：For secondary carrier SSCj, j=1 ..., N rebuild SSCjUp channel is：
If secondary carrier SSCjUsing TDD duplex modes, then base station is according to channel reciprocity, reconstruction SSCjDown channel is：
If secondary carrier SSCjUsing FDD duplex modes, then base station is obtained according to CSI-A and feedbackL=1 ...,
L rebuilds SSCjDown channel is：
Therefore, the present invention utilizes the frequency independence of channel space parameter, with smaller pilot-frequency expense and feedback overhead, profit
With a small amount of SSC training and feedback resources, the gain on SSC is had modified, ensure that carrier wave polymerize extensive mimo system overloading
The correctness of wave channel reconstructing greatly improves the availability for rebuilding channel.
The above, the only specific implementation mode in the present invention, but scope of protection of the present invention is not limited thereto, appoints
What is familiar with the people of the technology within the technical scope disclosed by the invention, it will be appreciated that expects transforms or replaces, and should all cover
Within the scope of the present invention, therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (7)
1. a kind of multiple carrier channel method for reconstructing towards carrier aggregation system, which is characterized in that include the following steps：
Step 1, user equipment send ascending pilot frequency on main carrier, and base station utilizes the main carrier ascending pilot frequency received, estimation
Go out the uplink B class channel state informations of A classes channel state information and main carrier, and rebuild main carrier up channel, and according to master
The duplex mode that carrier wave uses rebuilds main carrier down channel, and main carrier channel is obtained to rebuild；
Step 2, user equipment send the sparse pilot tone of uplink on the 1st to n-th secondary carrier, and base station is according to each auxiliary load received
The sparse pilot tone of uplink and A class channel state informations of wave estimate the uplink B classes channel state information and root of each secondary carrier
The duplex mode used according to each secondary carrier is estimated and feeds back the downlink B class channel state informations of each secondary carrier；
Step 3, base station are rebuild according to the uplink B class channel state informations of the A classes channel state information and each secondary carrier estimated
Each secondary carrier up channel, and the downlink B class channel state information weights of the duplex mode and secondary carrier used according to each secondary carrier
Each secondary carrier down channel is built, each secondary carrier channel is obtained to rebuild.
2. the multiple carrier channel method for reconstructing towards carrier aggregation system according to claim 1, it is characterised in that：The step
A classes channel state information includes the deflection and time delay of every propagation path in rapid 1.
3. the multiple carrier channel method for reconstructing towards carrier aggregation system according to claim 1, it is characterised in that：The side
Each B classes channel state information includes the gain of every propagation path in method.
4. the multiple carrier channel method for reconstructing towards carrier aggregation system according to claim 1, it is characterised in that：The step
The duplex mode that main carrier uses in rapid 1 includes Time Division Duplex TDD and Frequency Division Duplex FDD.
5. the multiple carrier channel method for reconstructing towards carrier aggregation system according to claim 4, it is characterised in that：The step
Main carrier down channel is rebuild according to the duplex mode that main carrier uses in rapid 1, specially：
When main carrier uses Time Division Duplex TDD mode, main carrier up channel progress transposition will be rebuild and obtain main carrier downlink
Channel；
When main carrier uses Frequency Division Duplex FDD mode, base station sends the sparse pilot tone of downlink of main carrier, will by wave beam forming
Pilot tone direction is adjusted to the direction of each path estimated by main carrier uplink；User equipment is based on A class channel state informations
With the sparse pilot tone of downlink of main carrier, the downlink B class channel state informations of main carrier are estimated and fed back；Base station is according to A class channels
The downlink B class channel state informations of status information and main carrier rebuild main carrier down channel.
6. the multiple carrier channel method for reconstructing towards carrier aggregation system according to claim 1, it is characterised in that：The step
The duplex mode that secondary carrier uses in rapid 2 includes Time Division Duplex TDD and Frequency Division Duplex FDD.
7. the multiple carrier channel method for reconstructing towards carrier aggregation system according to claim 6, it is characterised in that：The step
Estimated according to the duplex mode of each secondary carrier use in rapid 2 and feed back the downlink B class channel state informations of each secondary carrier, specifically
For：
When secondary carrier uses Time Division Duplex TDD mode, the uplink B class channel state informations of the secondary carrier are downlink B classes letter
Channel state information；
When secondary carrier uses Frequency Division Duplex FDD mode, base station sends the sparse pilot tone of downlink of the secondary carrier, passes through wave beam forming
Pilot tone direction is adjusted to the direction of each path estimated by main carrier uplink；User equipment is believed based on A class channel status
The sparse pilot tone of downlink of breath and the secondary carrier, estimates and feeds back the downlink B class channel state informations of the secondary carrier.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2739880A1 (en) * | 2008-10-22 | 2010-04-29 | Sharp Kabushiki Kaisha | Mobile communication system, mobile station apparatus, base station apparatus, method for managing mobile station apparatus, method for managing base station apparatus and processing section |
| CN106304301A (en) * | 2015-06-01 | 2017-01-04 | 普天信息技术有限公司 | The transmission method of power control command, base station and subscriber equipment in carrier aggregation |
| CN107113130A (en) * | 2014-10-27 | 2017-08-29 | 高通股份有限公司 | For the multichannel CSI feedback with the LTE/LTE A for exempting from licensed spectrum |
| WO2017177887A1 (en) * | 2016-04-11 | 2017-10-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for facilitating reference signal transmission |
| CN107911153A (en) * | 2017-10-31 | 2018-04-13 | 东南大学 | A kind of down channel method for reconstructing based on uplink CSI towards FDD system |
| US20180132267A1 (en) * | 2011-07-01 | 2018-05-10 | Comcast Cable Communications, Llc | Radio Resources Configuration Signaling in a Wireless Network |
-
2018
- 2018-05-21 CN CN201810489403.5A patent/CN108712243B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2739880A1 (en) * | 2008-10-22 | 2010-04-29 | Sharp Kabushiki Kaisha | Mobile communication system, mobile station apparatus, base station apparatus, method for managing mobile station apparatus, method for managing base station apparatus and processing section |
| US20180132267A1 (en) * | 2011-07-01 | 2018-05-10 | Comcast Cable Communications, Llc | Radio Resources Configuration Signaling in a Wireless Network |
| CN107113130A (en) * | 2014-10-27 | 2017-08-29 | 高通股份有限公司 | For the multichannel CSI feedback with the LTE/LTE A for exempting from licensed spectrum |
| CN106304301A (en) * | 2015-06-01 | 2017-01-04 | 普天信息技术有限公司 | The transmission method of power control command, base station and subscriber equipment in carrier aggregation |
| WO2017177887A1 (en) * | 2016-04-11 | 2017-10-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for facilitating reference signal transmission |
| CN107911153A (en) * | 2017-10-31 | 2018-04-13 | 东南大学 | A kind of down channel method for reconstructing based on uplink CSI towards FDD system |
Non-Patent Citations (3)
| Title |
|---|
| 802.11 WORKING GROUP OF THE LAN/MAN STANDARDS COMMITTEE OF THE: "IEEE Std 802.11", 《IEEE STANDARD ASSOCIATION》 * |
| YU HAN: "Efficient Downlink Channel Reconstruction for FDD Multi-Antenna Systems", 《IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS》 * |
| 孙乐: "LTE-A系统的信道估计和导频设计研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
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|---|---|
| CN108712243B (en) | 2020-10-16 |
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