CN105634711B - A kind of channel state information acquisition method of the extensive antenna array full-duplex wireless communication systems of separate type - Google Patents
A kind of channel state information acquisition method of the extensive antenna array full-duplex wireless communication systems of separate type Download PDFInfo
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- CN105634711B CN105634711B CN201610049658.0A CN201610049658A CN105634711B CN 105634711 B CN105634711 B CN 105634711B CN 201610049658 A CN201610049658 A CN 201610049658A CN 105634711 B CN105634711 B CN 105634711B
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- base station
- uplink
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- antenna array
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- 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
Abstract
The present invention relates to a kind of channel state information acquisition method of the extensive antenna array full-duplex wireless communication systems of separate type, this method is based on the extensive antenna array full-duplex wireless communication systems of separate type.System is made of base station and mobile terminal, and wherein base station has two secondary extensive antenna arrays, mobile terminal to have two slave antennas (or antenna array).All antennas or antenna array are operated in same running time-frequency resource.A wherein secondary extensive antenna array of base station and the common antenna of terminal is paired into dual-mode antenna group, and antenna and antenna array in addition also partner dual-mode antenna group.Two groups of antennas are communicated by push pull mode.I.e. one group in uplink, another group is then in downlink, then, two groups of exchanges, one group of downlink communication, another group of then uplink.Communication mode is recommended by the period, the extensive antenna in two groups obtains channel state information from up channel training sequence in turn.
Description
Technical field
The invention discloses a kind of channel state informations of the extensive antenna array full-duplex wireless communication systems of separate type to obtain
Method is taken, wireless communication, signal processing technology field are belonged to.
Background technology
The extensive antenna communication system of full duplex has full duplex (in-band full-duplex) and extensive nothing simultaneously
Line communicates the advantages of (Massive MIMO) technology, and therefore, the combination of two kinds of technologies can preferably improve frequency resource use
Efficiency and energy ecology to increase substantially the network insertion speed of user and the handling capacity of system, and then obviously change
The experience of kind user.
Due to the time-varying characteristics of radio communication channel, wireless communication system needs the status information of periodically update channel
(Channel State Information, CSI), fully to utilize the money of each subchannel when sending and receiving information
Source carries out the modulation /demodulation of signal.However the extensive antenna array wireless communication system of separate type is believed since there are many number of antennas
The data volume of channel state information is larger, and status information is caused to occupy a large amount of bandwidth resources.For using shared linear (antenna) array
For system, because its reception and transmitting antenna are with common antenna array, it is possible to utilize the uplink and downlink channel of system
Reciprocity obtains channel state information, irrelevant information feedback, to reduce overhead.But for using separate type day
The system of linear array can not use the reciprocity of channel to obtain letter since the spatial position of uplink/downlink antenna thereon is different
Channel state information.Resource occupation how is reduced as far as possible, realizes the channel shape of the extensive antenna array wireless communication system of separate type
State acquisition of information is the extensive antenna array full duplex communication system critical issue to be solved of separate type.
Due to the above reasons, at present to extensive full-duplex antenna communication system CSI acquisition methods, majority is based on shared
Aerial array.For separated antenna array, the research of CSI acquisition methods is also seldom.
Invention content
The channel state information acquisition side of the extensive antenna array full-duplex wireless communication systems of separate type proposed by the present invention
Method fundamentally solves the problems, such as that the extensive antenna array full-duplex wireless communication systems of separate type obtain channel state information.
This method provides a kind of simple and effective channel state information acquisition modes for the extensive communication system of co-channel full duplex simultaneously,
On the basis of not needing channel feedback expense, the communication of spectral efficient, energy-efficient and high-speed is realized.
Technical solution of the invention is as follows：
A kind of channel state information acquisition method of the extensive antenna array full-duplex wireless communication systems of separate type, this method
Based on the extensive antenna array full-duplex wireless communication systems of separate type, which is made of base station and mobile terminal, wherein base station
There are two secondary extensive antenna arrays, mobile terminal to there is two slave antennas or antenna array, all antennas or antenna array to be operated in for the moment
Frequency resource, i.e., simultaneously with frequency；A wherein secondary extensive antenna array of base station and the common antenna of terminal is paired into dual-mode antenna group,
Another set also partners dual-mode antenna group, and two groups of antennas are communicated by push pull mode, i.e., one group in uplink, it is another
Group is then in downlink, then, two groups of exchanges, one group of downlink communication, another group of then uplink；Communication mode is recommended by the period, two
Extensive antenna in group obtains channel state information from up channel training sequence in turn, and the channel state information obtains
Method is as follows：
Step 1：Upper half period, system carry out uplink communication using A group antennas, and B group antennas carry out downlink communication, terminal
User sends pilot training sequence to base station by the uplink in A group antennas, and base station obtains signal in the uplink；
Step 2：Estimated in A groups on the reception channel of extensive antenna according to the pilot training sequence received base station
Status information, the uplink and downlink channel for being provided to A groups use, and in subsequent channel coherency time, base station can utilize always
The demodulation that the channel state information carries out the uplink and downlink channel of A groups data is modulated；
Step 3：Lower half period, system carry out uplink communication using B group antennas, and A group antennas carry out downlink communication, terminal
User sends pilot training sequence to base station by the uplink in B group antennas, and base station obtains signal in the uplink；
Step 4：Estimated in B groups on the reception channel of extensive antenna according to the pilot training sequence received base station
Status information, the uplink and downlink channel for being provided to B groups use, and in subsequent channel coherency time, base station can utilize always
The demodulation that the channel state information carries out the uplink and downlink channel of B groups data is modulated；
Step 1: two, three, four repeat.
Due to being all to initiate pilot training sequence by mobile terminal in once for every half, base station can be directly obtained
The channel state information of extensive antenna, the feedback of status information is carried out without terminal, is obtained to substantially reduce system
It takes descending channel information and feeds back occupied expense.
Description of the drawings
Fig. 1：The working method schematic diagram of the present invention；
Fig. 2：The work flow diagram of this method；
Fig. 3：The dual-mode antenna periodic conversion schematic diagram of this method.
Specific implementation mode
With reference to embodiment, the present invention is further detailed, but not limited to this example.
Embodiments of the present invention are related to a kind of channel shape of the extensive antenna array full-duplex wireless communication systems of separate type
State information acquisition method, this method are based on the extensive antenna array full-duplex wireless communication systems of separate type, as shown in Figure 1.This is
System is made of base station and multiple mobile terminals, as shown in Figure 1.There are two be operated in same frequency and synchronization two are secondary for system
Extensive antenna array reduces the influence of self-interference between antenna array by physical isolation；Also respectively there are two secondary works on each mobile terminal
Make the antenna (or antenna array) on same running time-frequency resource, equally has physical isolation between antenna.The large-scale antenna array of base station
The A1 and antenna A2 of terminal forms antenna transmitting-receiving group A, the large-scale antenna array B1 of base station and the antenna B2 of terminal and forms antenna
Transmitting-receiving group B.At the beginning, upper half periodic system uses A groups as uplink, and B groups are as downlink；Terminal uses A groups
Up channel transmits pilot frequency sequence, and base station calculates and estimate the channel status of the chain road, and in the interim demodulation of upper half on this
User data in row channel is supplied to downlink to do channel then when the lower half period, the link was converted to downlink
Precoding helps user to demodulate down channel data.Next, lower half periodic system uses B groups as uplink, A groups are made
For downlink；Terminal transmits pilot frequency sequence using the up channel of B groups, and base station calculates and estimate the channel shape of the chain road
State, and the user data in the interim demodulation up channel of upper half, then in the lower half period, the link is converted to downlink chain
Lu Shi is supplied to downlink to do channel precoding, and user is helped to demodulate down channel data.
The channel state information acquisition method includes the following steps as shown in Figures 2 and 3：
Step 1：Upper half period, system carry out uplink communication using A group antennas, and B group antennas carry out downlink communication.Terminal
User sends pilot training sequence by the A2 in A group antennas and gives base station large-scale antenna array A1, and base station is in the uplink
Middle reception signal.Descending pilot frequency distinguishes uplink signal and self-interference signal for base station, and estimates for self-interference channel, such as schemes
Shown in 3.
Step 2：Base station the shape of extensive antenna A1 in A groups received on channel is estimated according to the pilot frequency sequence received
State information, the uplink and downlink channel for being provided to A groups use.In one cycle, such as in 12.5ms, base station can utilize always
The demodulation that the channel state information carries out the uplink and downlink channel of A groups data is modulated.
Step 3：Lower half period, system carry out uplink communication using B group antennas, and A group antennas carry out downlink communication.Terminal
User sends pilot training sequence by the B2 in B group antennas and gives base station large-scale antenna array B1, and base station is in the uplink
Middle reception signal.Descending pilot frequency distinguishes uplink signal and self-interference signal for base station, and estimates for self-interference channel, such as schemes
Shown in 3.
Step 4：Base station the shape of extensive antenna B1 in B groups received on channel is estimated according to the pilot frequency sequence received
State information, the uplink and downlink channel for being provided to B groups use.In one cycle, such as in 12.5ms, base station can utilize always
The demodulation that the channel state information carries out the uplink and downlink channel of B groups data is modulated.
Step 1: two, three, four repeat.
Due to being all to initiate pilot tone training by mobile terminal in once for every half, base station can be directly obtained big rule
The channel state information of mould antenna carries out the feedback of status information without terminal, to substantially reduce under system acquisition
Row channel information simultaneously feeds back occupied expense.The present invention solves the extensive antenna array full-duplex wireless communication systems of separate type
Channel state information obtain the problem of so that the deployment of the extensive antenna array full-duplex wireless communication systems of separate type is more
Add simple and feasible.
Claims (1)
1. a kind of channel state information acquisition method of the extensive antenna array full-duplex wireless communication systems of separate type, this method base
In the extensive antenna array full-duplex wireless communication systems of separate type, which is made of base station and mobile terminal, and wherein base station has
Two secondary extensive antenna arrays, mobile terminal have two slave antennas or antenna array, all antennas or antenna array to be operated in same time-frequency
Resource, i.e., simultaneously with frequency；A wherein secondary extensive antenna array of base station and the common antenna of terminal is paired into dual-mode antenna group A,
Another secondary extensive antenna array of base station and another slave antenna of terminal are paired into dual-mode antenna group B, and two groups of antennas are by recommending
Mode is communicated, i.e., one group in uplink, another group is then in downlink, and then, two groups of exchanges, one group of downlink communication is another
Organize then uplink；Communication mode is recommended by the period, the extensive antenna in two groups is obtained from up channel training sequence in turn
Channel state information, the channel state information acquisition method are as follows：
Step 1：Upper half period, system carry out uplink communication using A group antennas, and B group antennas carry out downlink communication, terminal user
Pilot training sequence is sent to base station by the uplink in A group antennas, and base station obtains signal in the uplink；
Step 2：Base station the state of extensive antenna in A groups received on channel is estimated according to the pilot training sequence received
Information, the uplink and downlink channel for being provided to A groups use, and in subsequent channel coherency time, base station can utilize always the letter
The demodulation that channel state information carries out the uplink and downlink channel of A groups data is modulated；
Step 3：Lower half period, system carry out uplink communication using B group antennas, and A group antennas carry out downlink communication, terminal user
Pilot training sequence is sent to base station by the uplink in B group antennas, and base station obtains signal in the uplink；
Step 4：Base station the state of extensive antenna in B groups received on channel is estimated according to the pilot training sequence received
Information, the uplink and downlink channel for being provided to B groups use, and in subsequent channel coherency time, base station can utilize always the letter
The demodulation that channel state information carries out the uplink and downlink channel of B groups data is modulated；
Step 1: two, three, four repeat.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022214389A3 (en) * | 2021-04-07 | 2022-11-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Flexible antenna port mapping for retaining channel reciprocity in full-duplex wireless communication systems |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385004B (en) * | 2018-12-27 | 2021-07-09 | 北京大学 | Same-frequency simultaneous full-duplex communication system and method based on spatial modulation |
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| CN1474525A (en) * | 2002-08-09 | 2004-02-11 | 华为技术有限公司 | Signal transmitting and receiving method based on time-division duplex in radio communication system |
| CN104052529A (en) * | 2013-03-14 | 2014-09-17 | 上海贝尔股份有限公司 | Antenna array and communication method used for full duplex communication |
| CN104753658A (en) * | 2013-12-27 | 2015-07-01 | 中国移动通信集团公司 | Method and device for data transmission in simultaneous same-frequency full duplex system |
| CN104935533A (en) * | 2015-06-16 | 2015-09-23 | 山东大学 | Large-scale antenna mobile communication system and communication method using double-frequency push-pull mode |
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- 2016-01-25 CN CN201610049658.0A patent/CN105634711B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474525A (en) * | 2002-08-09 | 2004-02-11 | 华为技术有限公司 | Signal transmitting and receiving method based on time-division duplex in radio communication system |
| CN104052529A (en) * | 2013-03-14 | 2014-09-17 | 上海贝尔股份有限公司 | Antenna array and communication method used for full duplex communication |
| CN104753658A (en) * | 2013-12-27 | 2015-07-01 | 中国移动通信集团公司 | Method and device for data transmission in simultaneous same-frequency full duplex system |
| CN104935533A (en) * | 2015-06-16 | 2015-09-23 | 山东大学 | Large-scale antenna mobile communication system and communication method using double-frequency push-pull mode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022214389A3 (en) * | 2021-04-07 | 2022-11-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Flexible antenna port mapping for retaining channel reciprocity in full-duplex wireless communication systems |
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