CN107947838A - The mixed-beam figuration framework and encoder design of a kind of Hybrid connections - Google Patents

The mixed-beam figuration framework and encoder design of a kind of Hybrid connections Download PDF

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Publication number
CN107947838A
CN107947838A CN201710947798.4A CN201710947798A CN107947838A CN 107947838 A CN107947838 A CN 107947838A CN 201710947798 A CN201710947798 A CN 201710947798A CN 107947838 A CN107947838 A CN 107947838A
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framework
matrix
hybrid
mixed
unconfinement
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王亚峰
张笛笛
肖宇
李光辉
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Beijing University of Posts and Telecommunications
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Beijing University of Posts and Telecommunications
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The invention discloses a kind of mixed-beam figuration framework and encoder design algorithm and realization device based on Hybrid connections.The design of the unconfinement hybrid coder of successive interference cancellation thought is primarily based on, designs optimal hybrid coding matrix；Secondly in the case of known to optimal hybrid coding matrix, the hybrid coding matrix of the constraint hybrid coder design constraint based on suboptimization, it is possible to obtain the analog encoding matrix of whole system and digital encoder matrix.The algorithm can effectively ensure that the spectrum efficiency of system, and improve the energy efficiency of system while system hardware implementation complexity is reduced.

Description

The mixed-beam figuration framework and encoder design of a kind of Hybrid connections
Technical field
The present invention relates to wireless communication technology field, and in particular in extensive mimo system mixed-beam figuration framework and The design of encoder algo.
Background technology
In order to meet that 5G sharply increases power system capacity demand, there are some new wireless communication techniques.But it is The lifting of system capacity mainly includes following three aspects：Improve spectrum efficiency, increase number of cells, lifting spectral bandwidth；Therewith One of corresponding key technology is extensive MIMO technology, super-intensive network (UDN), millimeter wave (mmWave) communication respectively.So And above-mentioned different technologies are not completely self-contained, mutually promote between them, be complementary to one another.For example, the wavelength of mmWave compared with It is short to arrange substantial amounts of antenna in limited physical space；Large-scale antenna array can be carried by wave beam forming For the antenna array gain of bigger, so as to make up losses of the mmWave in transmitting procedure.But above-mentioned technology is be combineding with each other During also generate the problem of some are new.Traditional digital beam forming for the extensive mimo systems of mmWave Technology needs that the number of radio frequency (RF) link is identical with number of antennas, this is unpractical in specific hardware realization.Therefore, Traditional digital beam forming technology is no longer desirable for extensive mimo system.
One of the key technology of mixed-beam figuration technology as extensive mimo system, can effectively reduce RF links Number, so as to reduce the implementation complexity of large-scale antenna array.At present, the mixed-beam on large-scale antenna array is assigned Shape framework is broadly divided into two kinds：Full connection framework and part connection framework.Each RF link connections for connection framework entirely , it is necessary to which the number of the phase shifter of consumption is more on to all array elements of aerial array, the complexity of realization is higher, but system is simulated The free degree at end is higher, therefore is capable of providing the spectrum efficiency of higher.For part connection framework, each RF link connections To subarray whole array elements, it is necessary to consumption phase shifter number it is less, the complexity of realization is relatively low, causes system analog end The free degree it is relatively low, therefore the spectrum efficiency of system relative to full connection framework for can lose.
The content of the invention
The present invention proposes the mixed-beam figuration framework and encoder design algorithm and realization device of a kind of Hybrid connections, The framework can effectively ensure that the spectrum efficiency of system while system hardware implementation complexity is reduced, while effectively carry The high energy efficiency of system.
The present invention the specific implementation process is as follows：
The mixed-beam figuration frameworks of the Hybrid connections of proposition as shown in Figure 1, in the architecture each submatrix be connected to it is more On a RF links, while each all antennas of the RF link connections to corresponding submatrix.
For the mixed-beam figuration framework of Fig. 1, the design of hybrid coder is divided into two parts：Based on successive interference cancellation The design of the unconfinement hybrid coder of thought；The constraint hybrid coder design of suboptimization.
Part I, for Fig. 1 Hybrid connections HBF frameworks, it is assumed that transmitting terminal antenna is Nt, it is N to pick end number of antennasr, Channel matrix isThe number of the total RF chains of system is NR=SD, wherein D represent submatrix column number, and S is represented per height The number of the RF chains of array connection, digital end are encoded toAnalog end is encoded toFor diagonal matrix,For the data flow of transmission, n meets n ∈ CN (0, σ for independent white Gaussian noise2), the signal of transmitting terminal can represent For：
Wherein F=FRFB, the channel capacity of system can be expressed as：
Wherein mix the coding of its every a line one subarray of correspondence of block code matrix F, each corresponding data of row The coding of stream.Meanwhile F matrix row is arranged similar in appearance to digital coding matrix similar in appearance to analog encoding matrix.To this for algorithmic notation Simplification it is proposed that 2 points hypothesis：
(1) number of data streams for flowing through subarray is equal to the RF chain numbers of subarray connection；
(2) same data flow transmits (not influencing algorithm performance) in adjacent subarray.
Based on above-mentioned hypothesis it is contemplated that being transmitted to different data flows by identical multiple subarrays, mixed block coding Matrix F can be written as F=[F1,F2,...,FK], so that the optimization problem of hybrid coding matrix can be decomposed into multiple coding The optimization problem of matrix.The spectrum efficiency of system can be expressed as
Then optimal hybrid coding matrix F can be obtained according to the flow of Fig. 2.
Part II is the hybrid coding matrix of design constraint in the case of known to optimal hybrid coding matrix F.It is false It is G to conclude a contract or treaty beam hybrid coding matrix, and matrix G and matrix F have identical structure, therefore G can be expressed as G=[G1,G2,..., GK], so as to have
According to foregoing description it is understood that optimal constraint encoder matrix can be obtained by following formula
It is also approximate that can obtain the corresponding encoder matrix of each submatrix by the approximation of whole matrix, so as to have
Without considering Gi,subIn nonzero element, we can further obtain
WhereinWithRespectively Gi,subAnd Fi,subIn nonzero element.For the simplification of arthmetic statement, it will be assumed that WithMethod according to above being divided to matrix can be divided into two parts, while right respectivelyWithPolar decomghtion is carried out to obtain
WhereinP and M meet P respectivelyHP=ISAnd MHM=IS.Define B=[B1,B2] With W=[W1,W2], so as to have
According to above formula, we, which can obtain the corresponding analog- and digital- encoder matrixs of subarray i, to be expressed as
It is rightIt is normalized to obtain
Repeat the above process the D analog encoding matrix for being obtained with whole system and digital encoder matrix.
Brief description of the drawings
Fig. 1 is the mixed-beam figuration framework of Hybrid connections.
Fig. 2 is the unconfinement hybrid coding algorithm block diagram based on successive interference cancellation.
Fig. 3 is encoder realization device under the mixed-beam figuration framework of Hybrid connections.

Claims (6)

1. a kind of mixed-beam figuration framework of Hybrid connections and the mixed-beam forming algorithm for being common to existing framework, the framework Hardware consumption and implementation complexity are characterized in that between full connection and part connection framework, framework is connected entirely and part connects Framework is its special shape, and the framework has more preferable energy efficiency.The algorithm characteristics are to be suitable for above-mentioned three at the same time Kind framework, the hybrid coding matrix of unconfinement is obtained according to the thought of successive interference cancellation, it is encoded by constraint and unconfinement Between approximation relation constrained approximation relation between unconfinement subarray hybrid coding submatrix, by being carried out to matrix Polar decomghtion obtains the hybrid analog-digital simulation of suboptimum and digital encoder matrix.
2. according to the method described in claim 1, it is characterized in that, the framework has flexible design freedom, specifically include： The number that each subarray sends data flow can flexibly be adjusted according to the business demand of system；Secondly, RF number of links phases With in the case of, the number for the phase shifter that Hybrid connections framework needs is between full connection and part connection framework.
3. according to the method described in claim 1, it is characterized in that, according to the corresponding hybrid coding matrix of Hybrid connections framework Feature, splits hybrid coding matrix, and encoder matrix optimization problem, which is decomposed into multiple coded sub-matrices optimizations, asks Topic, then obtains the hybrid coding matrix of unconfinement using the thought of successive interference cancellation.
4. according to the method described in claim 3, it is characterized in that, compiled according to the hybrid coding matrix of unconfinement and constraint mixing Approximation relation between code matrix, obtains between each subarray unconfinement hybrid coding matrix and constraint encoder matrix Approximation relation, then finally obtains the encoder matrix of constraint according to the polar decomghtion of matrix.
5. according to claim 1, the method described in 2,3,4, it is characterised in that above-mentioned algorithm is equally applicable to connection and part entirely The mixed-beam figuration framework of connection.
6. a kind of mixed-beam size enlargement apparatus of Hybrid connections suitable for extensive antenna system, including：
Digital precode module, the data flow for system to be sent are mapped to corresponding RF links；
Precoding module is simulated, for the data flow for flowing through RF links being mapped to different bays.
Sub-array antenna module, for sending the signal of radio-frequency head.
CN201710947798.4A 2017-10-12 2017-10-12 The mixed-beam figuration framework and encoder design of a kind of Hybrid connections Pending CN107947838A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109787671A (en) * 2019-03-07 2019-05-21 西安电子科技大学 A kind of special mixed-beam forming device structured the formation and method
CN109861731A (en) * 2019-01-23 2019-06-07 北京理工大学 A kind of mixing precoder and its design method
WO2020125557A1 (en) * 2018-12-21 2020-06-25 深圳市中兴微电子技术有限公司 Hybrid beam forming method and device
CN113794709A (en) * 2021-09-07 2021-12-14 北京理工大学 Hybrid coding method for binary sparse matrix

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CN105306125A (en) * 2015-11-16 2016-02-03 江苏中兴微通信息科技有限公司 Asymmetrical shared hybrid beam forming transmitting-receiving device
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CN105306125A (en) * 2015-11-16 2016-02-03 江苏中兴微通信息科技有限公司 Asymmetrical shared hybrid beam forming transmitting-receiving device
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020125557A1 (en) * 2018-12-21 2020-06-25 深圳市中兴微电子技术有限公司 Hybrid beam forming method and device
US11489572B2 (en) 2018-12-21 2022-11-01 Zte Corporation Hybrid beam-forming method and device
CN109861731A (en) * 2019-01-23 2019-06-07 北京理工大学 A kind of mixing precoder and its design method
CN109861731B (en) * 2019-01-23 2022-02-15 北京理工大学 Hybrid precoder and design method thereof
CN109787671A (en) * 2019-03-07 2019-05-21 西安电子科技大学 A kind of special mixed-beam forming device structured the formation and method
CN109787671B (en) * 2019-03-07 2021-09-03 西安电子科技大学 Hybrid beam forming device and method
CN113794709A (en) * 2021-09-07 2021-12-14 北京理工大学 Hybrid coding method for binary sparse matrix
CN113794709B (en) * 2021-09-07 2022-06-24 北京理工大学 Hybrid coding method for binary sparse matrix

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Application publication date: 20180420