CN105992316B - The method and device of power distribution is limited in a wireless communication system - Google Patents
The method and device of power distribution is limited in a wireless communication system Download PDFInfo
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- CN105992316B CN105992316B CN201510054528.1A CN201510054528A CN105992316B CN 105992316 B CN105992316 B CN 105992316B CN 201510054528 A CN201510054528 A CN 201510054528A CN 105992316 B CN105992316 B CN 105992316B
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Abstract
The present invention provides a kind of method and device for limiting power distribution in a wireless communication system.The above method includes executing a singular value decomposition (Singular Value Decomposition, SVD) operation to an access matrix, and obtain pair of horns matrix, wherein above-mentioned diagonal matrix is made of multiple cell matrixs.The above method further includes the diagonal entry for decomposing (Generalized Triangular Decomposition, GTD) using a Generalized Triangular and the diagonal entry in above-mentioned diagonal matrix being converted to by a upper left corner cell matrix and a lower right corner cell matrix according to a sequence a specified diagonal line vector in parallel simultaneously.The present invention does parallel calculation to two cell matrixs simultaneously, can save the division and multiplying and many hardware resources of large amount of complex.
Description
Technical field
The invention relates to cordless communication networks, and communicate in particular in a multi-input multi-output wireless
The method and device of power distribution is limited in system.
Background technique
Communication on the channel multiple-input and multiple-output (Multiple Input Multiple Output System, MIMO)
In recent years it is always the thematic emphasis of further investigation, and has been one of breakthrough most great in modern communications.On the channel MIMO
Communication can for the communication for using the channel single-input single-output (Single-Input Single-Output, SISO)
Support higher data transfer rate and with bigger reliability.MIMO communication can help to seem that the following world-wide web of solution limitation is intensive
The bottleneck problem of message capacity in type wireless network.It seems wide that many researchers, which believe that the technology of MIMO is ready for being added,
Frequency wireless access system, Wireless LAN (Wireless Local Area Network, WLAN) and the third generation (3G) and
The commercial wireless product and network that forth generation (4G) network etc. is extensive, standard drives.
One substantive characteristics of MIMO communication system is to issue multiple receptions by suitably encoding from multiple transmitting antennas
The signal of antenna, the system multichannel can be propagated in this wireless communication it is long-term since the problem of be converted into advantage.MIMO is logical
Letter system is declined using random channel, and improves channel capacity using multipath delay extension in the conceived case.This is
The signal of multiple receiving antennas is sent in the bit error rate (Bit Error by combining at receiver from multiple transmitting antennas
Ratio, BER) or data transfer rate (bit number per second) meaning on improve quality and realize.Relative to more conventional communication system quantity
The prospect of grade progress is a more and more concerned reason of the technology based on MIMO.
For transceiver, most of researchs concentrate on linear transceiver design so far.According to conventional linear transceiver
Design makes have a transmission using well known singular value decomposition (Singular Value Decomposition, SVD) technology
The access matrix diagonalization of channel characteristic, so that channel conveying capacity maximizes.But this conventional method can be because of singular value decomposition
And increase sizable complexity to modulation /demodulation and coding and decoding process needed for successfully transmitting signal on multiple subchannels.
Therefore, Generalized Triangular is decomposed (Generalized Triangular Decomposition, GTD) method and is suggested
To allow transmission end to be transmitted transimission power to improve transmission efficiency according to specified restrictive condition.However, current is wide
Adopted triangle decomposition has more complex operation and rate limitation.If directly using the hardware realization above method will expend it is many at
This.Therefore, it is necessary to a kind of novel implementation method, complexity can be reduced, and can be reduced the cost, it can also be rapidly in hardware
It realizes.
Summary of the invention
The purpose of the present invention is to provide a kind of method and devices for limiting power distribution in a wireless communication system, with drop
The complexity of the low prior art.
The present invention provides a kind of method for limiting power distribution in a wireless communication system.The above method includes to a channel
Matrix executes a singular value decomposition (Singular Value Decomposition, SVD) operation, and obtains pair of horns matrix,
Wherein above-mentioned diagonal matrix is made of multiple cell matrix matrixes.The above method further includes being decomposed together using a Generalized Triangular
The upper left corner Shi Youyi cell matrix and a lower right corner cell matrix are according to a sequence by the diagonal entry in above-mentioned diagonal matrix
The diagonal entry of a specified diagonal line vector is converted in parallel.
In some embodiments, above-mentioned singular value decomposition operation and the decomposition of above-mentioned Generalized Triangular are by an at least CORDIC
(Coordinate Rotation Digital Computer, coordinate rotation digital computer) operation is realized.In some realities
Apply in example, using the vector pattern (Vectoring Mode) in above-mentioned CORDIC operation by above-mentioned upper left corner cell matrix and
Above-mentioned lower right corner cell matrix starts to convert all diagonal element matrixes in parallel as a upper triangular matrix.In some embodiments,
Diagonal entry in above-mentioned diagonal matrix is converted to the diagonal line element of a specified diagonal line vector in parallel according to said sequence
Element include: by above-mentioned upper left corner cell matrix according to a upper left to bottom right sequence by remaining diagonal element matrix conversion be it is upper
Triangular matrix；And remaining diagonal element matrix is turned according to a bottom right to upper left sequence by above-mentioned lower right corner cell matrix
It is changed to upper triangular matrix；The step of wherein being converted by above-mentioned upper left corner cell matrix and above-mentioned lower right corner cell matrix is to transport in parallel
Row, until the diagonal entry in above-mentioned diagonal matrix is converted to the diagonal entry of above-mentioned specified diagonal line vector.?
In some embodiments, the product of all diagonal entry absolute values of above-mentioned specified diagonal line vector is equal to above-mentioned diagonal matrix
The product of all diagonal entry absolute values.In some embodiments, said units matrix is one 2 × 2 matrixes.
The present invention also provides a kind of communication devices for limiting power distribution in a wireless communication system.Above-mentioned communication device packet
Include reprogrammable CORDIC (Coordinate Rotation Digital Computer, coordinate rotation digital computer) electricity
Road.Above-mentioned reprogrammable CORDIC circuit further includes an at least CORDIC element.An above-mentioned at least CORDIC element is to one
Access matrix executes a singular value decomposition operation, and obtains pair of horns matrix, wherein above-mentioned diagonal matrix is by multiple unit squares
Battle array is formed, and is decomposed using a Generalized Triangular simultaneously by a upper left corner cell matrix and a lower right corner cell matrix according to one
Diagonal entry in above-mentioned diagonal matrix is converted to the diagonal entry of a specified diagonal line vector by sequence in parallel.
The method and device that power distribution is limited in a wireless communication system of the invention can be simultaneously to two unit squares
Battle array does parallel calculation.In addition, the operation (singular value decomposition operation and Generalized Triangular are decomposed) that the present invention is all can all pass through
CORDIC is realized, to save a large amount of and complicated division and multiplying, also saves many hardware resources, is reached saving power and is disappeared
The purpose of consumption.
Hereinafter introduce highly preferred embodiment of the present invention.Each embodiment is but non-to limit to illustrate the principle of the present invention
The system present invention.The scope of the present invention is when being subject to the attached claims.
Detailed description of the invention
Fig. 1 shows the system schematic according to an embodiment of the invention for carrying out MIMO cooperative communication.
Fig. 2 shows the block diagram of a sender system according to an embodiment of the invention and a receiver system.
Fig. 3 showing using CORDIC as the hardware structure of core and signal transfer direction described in an embodiment according to the present invention
It is intended to.
Fig. 4 is the architecture diagram of main CORDIC and subordinate CORDIC described in an embodiment according to the present invention.
Fig. 5 shows the flow diagram that diagonal entry is converted described in an embodiment according to the present invention.
Fig. 6, which is shown, limits function in multi-input multi-output wireless communication system described in an embodiment according to the present invention
The method flow diagram of rate distribution.
Fig. 7, which is shown, illustrates hardware core framework needed for different matrix sizes described in an embodiment according to the present invention
Figure.
Fig. 8 shows comparison figure described in an embodiment according to the present invention.
Symbol description:
100~system；
110~base station；
120~user equipment；
200~MIMO systems；
210~sender system；
212~data source；
214~send data processor；
220~multi-input multi output processor；
222a~222t~transmitter；
224a~224t~antenna；
230~processor；
232~memory；
236~data source；
238~send data processor；
242~receive data processor；
240~demodulator；
250~receiver system；
252a~252r~antenna；
254a~254r~receiver；
260~receive data processor；
270~processor；
272~memory；
280~modulator；
600~flow chart；
S605, S610~step；
D11、D22、D33、D44~diagonal core；
O12、O13、O14、O23、O24、O34、O21、O31、O32、O41、O42、O43~non-diagonal core；.
M1~M2~main CORDIC core；
S1~S4~subordinate CORDIC core；
M~coordinate function；
dn~rotation information.
Specific embodiment
In order to which the purpose of the present invention, feature and advantage can be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended pictorial image 1 is described in detail to Fig. 8.This specification provides different embodiments to illustrate the skill of different embodiments
Art feature.Wherein, the configuration of each element in embodiment is for purposes of discussion, not to limit this case.
As illustrated here, different modes can be used to realize for uniform channel decomposing scheme.It is also possible to apply the invention to each
In kind multiple antenna communication.
It is aobvious to existing those skilled in the art although being mainly illustrated in the environment of wireless communication system herein
And be clear to, it is can also be applied to other communication systems and device.These systems include voice-and-data system, such as
It is reached an agreement on using digital telecommunication and using systems such as digital subscriber line (DSL).It can be used to realize that the inventive system comprises for example
The mobile devices such as mobile phone, personal digital assistant (PDA) and laptop computer.
Fig. 1 shows system 100 schematic diagram according to an embodiment of the invention for carrying out MIMO cooperative communication.Although for letter
For the sake of single description, the MIMO cooperative communication system of Fig. 1 illustrates only a base station 110, user's equipment (User
Equipment, UE) 120, wherein base station 110 has three transmitting antennas, and user's equipment 120 has two receiving antennas.Value
It obtains it is noted that these specific system configuration parameters do not limit the invention.That is, implementing according to the present invention
The MIMO cooperative communication system of example may include at least more than one user's equipment, and cooperate with user's equipment logical
Multiple base stations of letter, wherein the antenna amount that each base station and user's equipment can have is also not limited in this embodiment and is retouched
Three stated and two, but any required amount of antenna is equipped with according to the concrete condition of system.
Fig. 2 shows a sender system 210 (can be considered base station) and a receiver system 250 (can be considered user's equipment)
Apply the block diagram in multi-input multi output (Multiple-input Multiple-output, MIMO) system 200.
In sender system 210, data source 212 provides the data on flows in generated data flow to transmission data processor 214.
In one embodiment, each data flow is sent via individual transmission antenna.Data processor 214 is sent to use
Data on flows is formatted, coding, staggeredly handles and provide the data after coding by the compiling method that especially data flow is selected thus.
Data flow after each coding can utilize orthogonal frequency division multiplexing technology (Orthogonal frequency-
Division multiplexing, OFDM) modulation come with guidance data (pilot data) make multiplexing processing.In general, draw
Derivative guides data also to be used as estimating frequency in receiving end according to being a string of given data models for doing to handle using certain methods
It responds in road.Each multiplexing treated guidance data and coding after data next can be used select modulating method (Binary-phase
Position offset modulation BPSK, quadrature phase offset modulation QPSK, multilevel phase deviate modulation M-PSK, Multilevel Quadrature Amplitude modulation M-
QAM) make modulation (that is, symbol is corresponding, symbol mapped).Data transmission rate, coding and the modulation of each data flow be by
Indicated by processor 230.
Next the modulation symbol that all data flows generate is sent to sends multi-input multi output processor 220, with
Continue with modulation symbol (for example, using orthogonal frequency division multiplexing technology (OFDM)).Send multi-input multi output processor
Next 220 provide NTModulation symbol flow to NTTransmitter (TMTR) 222a to 222t.
Each transmitter 222a to 222t receives and processes respective symbol stream and provides one or more anaiog signal, and adjusts
Section (amplification, is lowered at filtering) these anaiog signals, are suitble to providing with the letter of modulation transmitted by multi-input multi output channel
Number.Next, the N sent out by transmitter 222a to 222tTSignal is respectively sent to N after modulationTAntenna 224a to 224t.
At 250 end of receiver system, signal is in N after the modulation sentRAfter antenna 252a to 252r is received, Mei Gexin
Number it is sent to respective receiver (respective receiver, RCVR) 254a to 254r.Each receiver 254a is extremely
554r adjusts (amplification, is lowered at filtering) respective received signal, and the signal after adjusting is digitized to provide sample, connects down
To handle sample to provide corresponding " receiving end " symbol stream.
NRIt receives symbol stream and reception data processor 260 is sent to by receiver 254a to 254r, receive data processor
260 N that will be transmitted by receiver 254a to 254rRIt receives symbol stream and handles technical treatment with specific receive, and N is providedT
" measuring " symbol stream.Receive data processor 260 next to it is each measure symbol stream demodulate, de-interlacing and it is decoded move
Make with the data on flows in restoring data stream.Receive data processor 260 performed by movement in sender system 210
Transmission multi-input multi output processor 220 and to send movement performed by data processor 214 complementary.
Processor 270 periodically determine to be intended to using pre-coding matrix.Processor 270 formulates one by matrix index
Reverse link information composed by (matrix index) and rank value (rank value).
This reverse link information may include various communication links and/or the relevant information for receiving data flow.Reverse link letter
Next breath is sent to sends data processor 238, is also sent to this by the data flow that data source 236 transmits and collects and be sent to tune
Become device 280 and carry out modulation, after adjusting via receiver 254a to 254r, then sends sender system 210 back to.
At 210 end of sender system, signal is received by antenna 224a to 224t after the modulation from receiver system 250,
It is conditioned in transmitter 222a to 222t, is demodulated in demodulator 240, then be sent to and receive data processor 242 to extract by connecing
Receive the reverse link information that 250 end of device system is sent out.Processor 230 next can determine to be intended to using pre-coding matrix,
And handle the information extracted.
In the system based on MIMO, N × M access matrix H that radio channel can be K with a rank number is indicated, wherein N
For the number of receiving antenna, M is the number of transmitting antenna.Access matrix H can be via a singular value decomposition (Singular
Value Decomposition, SVD) operation to be to be assumed to following form:
H=U ∑V H
Wherein, U and V is Unitary Matrix (Unitary Matrix) and Σ is diagonal matrix.The diagonal line vector of Σ be σ=
[σ1,…,σK]TAnd σ1≥…≥σK。
In order to improve arithmetic speed, the present invention proposes that a kind of parallel Generalized Triangular decomposes algorithm, uses two operations
Core carries out twice of parallel calculation, and can carry out operation by easy CORDIC.In an embodiment of the present invention, it is carried out
General CORDIC operation can be expressed as follows:
Xn+1=Xn-m·dn·Yn·2-n
Yn+1=Yn+dn·Xn·2-n
Zn+1=Zn+dn·tan-1(n)
Wherein, the coordinate function system of coordinate system function m control CORDIC institute operation, and rotation information dnIndicate rotation
Direction and angle.
Referring to Fig. 3, Fig. 3 is according to an embodiment of the invention using CORDIC as the systolic arrays of core design
The schematic diagram of (Systolic Array) hardware structure and signal transfer direction, wherein D**It is expressed as diagonal core (Diagonal
Core), that is, the core being located on diagonal line.O**Non-diagonal core (off-diagonal core) is then represented, i.e., is not located at diagonal
Core on line.And the cell matrix of each core calculations one 2 × 2, therefore this 4 × 4 systolic arrays can support one 8 × 8
Matrix.Pair of horns core is by 2 main CORDIC cores (M in such as Fig. 31~M2) and 2 subordinate CORDIC cores (in such as Fig. 3
S1~S2) formed, and a non-diagonal core is made of (S in such as Fig. 34 subordinate CORDIC cores1~S4).Main core
Scheming calculates required rotation information dn, and by the calculated rotation information d of institutenThe subordinate core for passing to same row (column), makes
It is according to rotation information dnAnd it does and rotates.
Fig. 4 is the hardware design schematic diagram of the essential core and subordinate core according to another embodiment of the present invention.Main
In core, it can control CORDIC to switch between rotary mode and vector pattern by setting control signal VEC, pass through setting
Coordinate function m can be switched in different coordinate function system (circle, linear, surmount).In the present embodiment, it is controlled by setting
Signal VEC and coordinate function m processed can be switched between two kinds of operation modes.The first is " circle rotation (circular-
Rotation) " mode, to rotation information d needed for obtaining element-specific to be eliminated after Xn, Yn, Zn operationn.Second
It is " surmounting Vector rotation (hyperbolic-vectoring) " mode, to be calculated for GTDFunction.From
Belong to core to be then made of two shift units (shifter) and two adder-subtractors, by the vector (X, Y) of input according to by main
The rotation information d that core is transmittednIt does and rotates.In an alternative embodiment of the invention, the switching of different coordinate systems function m can lead to
1-bit XOR (not being painted) control adder-subtractor is crossed to realize.
After having executed singular value decomposition (SVD) operation to access matrix H, executes a Generalized Triangular and decompose.Generalized Triangular
Decomposition can give a user and specify vector r=[r1,…,rK]T.And this user specifies vector need to meet Weyl multiplication preferential
Condition (Weyl ' s multiplicative majorization condition), meaning are as follows:
And
Therefore, access matrix H formula can be indicated below:
H=QRP H
Wherein, Q and P is Unitary Matrix (Unitary Matrix) and R is the upper triangular matrix that diagonal line vector is r.
In order to quickly calculate upper triangular matrix R, the present invention makees two to two cell matrixs simultaneously with two hardware cores
Times parallel calculation, while converting on diagonal line two elements and specifying element into user.The mode of conversion is divided into two ways, and one
To carry out Generalized Triangular decomposition by the cell matrix of the upper left corner, referred to as " Top-down GTD ", another way is by the lower right corner
Cell matrix starts to carry out Generalized Triangular decomposition, referred to as " Bottom-up GTD ".
Top-down GTD can following manner subrepresentation
Wherein, c=cos θ, s=sin θ,
Bottom-up GTD can following manner subrepresentation
Wherein, c=cos θ, s=sin θ,
By taking Top-down GTD as an example, the rotation of special angle, above-mentioned Top- are to cell matrix using CORDIC
The formula (1) of down GTD is variable are as follows:
Come again, makes lower left corner element 0, upper left using the vector pattern (Vectoring Mode) in CORDIC operation
Angle element is converted to rk。
Fig. 5 shows the flow diagram that diagonal entry is converted described in an embodiment according to the present invention.With one 8 × 8 squares
For battle array, as shown, Top-down is executed by the upper left corner cell matrix of matrix and lower right corner cell matrix respectively
GTD and Bottom-up GTD.As acquirement diagonal entry r1And r8Afterwards, Top-down is executed according to a upper left to bottom right sequence
GTD, and Bottom-up GTD is executed according to a bottom right to upper left sequence, it is upper triangle by remaining diagonal element matrix conversion
Matrix.In this example, the step of executing Top-down GTD and Bottom-up GTD is to run parallel, until diagonal element
Until diagonal entry in matrix is converted to the diagonal entry of specified diagonal line vector.
Fig. 6, which is shown, limits function in multi-input multi-output wireless communication system described in an embodiment according to the present invention
The method flow diagram 600 of rate distribution.In step s 605, a singular value decomposition operation is executed to an access matrix, and obtains one
Diagonal matrix, wherein above-mentioned diagonal matrix is made of multiple cell matrixs.In step S610, a Generalized Triangular point is utilized
Solution respectively by a upper left corner cell matrix and a lower right corner cell matrix according to a sequence by the diagonal line in above-mentioned diagonal matrix
Element is converted to the diagonal entry of a specified diagonal line vector in parallel.
In another embodiment, device 300 may include a reprogrammable CORDIC circuit, wherein above-mentioned reprogrammable
CORDIC circuit may include an at least CORDIC element, to execute movement described in above-described embodiment and step.
In one embodiment, the mode for supporting small dimensional matrix is using instruction set (Instruction Set) as logical
The control core of T unit, and gate clock pulse (Clock Gating) is combined to stop buffer to realize.When the small dimension square of operation
When battle array, such as 6 × 6 matrixes, before input matrix signal, the mode (SVD or GTD) that must first input required operation is big with matrix
It is small.After receiving these signals, control core can make corresponding control, and stop diagonal core D using instruction14、
D24、D34、D44、D41、D42、D43, and the buffer included is stopped using gated clock to save power consumption.Such as Fig. 7 institute
Show, grey indicates that the core of operation, white indicate that the core stopped, black circles represent arbitrary number, and white circle is then number
Zero.It is sat it can be seen from the above, required CORDIC operation only has circle coordinates vectorization mode, hyperbolic coordinates vectorization mode and circle
Mark rotary mode.Therefore, the CORDIC circuit containing above functions only need to be used, to save area.
Fig. 8 shows comparison figure described in an embodiment according to the present invention.As shown, since Generalized Triangular decomposes algorithm
The operation of many multiplication and division is contained, it is very high to realize that Generalized Triangular decomposes the traditional hardware complexity of algorithm.If no
To hardware do it is any improvement be directly realized by if, the speed of processing is very slow.If being solved using the special hardware of the present invention wide
Adopted triangle decomposition algorithm, then and can be more traditional hardware promote higher processing speed.For example, come with 8 × 8 matrix
It sees, parallel calculation proposed by the invention can promote 1.66 times of processing speed.When matrix approach infinity, then the speed that handles
Degree can about be promoted to 2 times.In addition, 4 times of processing speed can be promoted again by hardware core proposed by the invention.
In conclusion the method for the invention for limiting power distribution in a multi-input multi-output wireless communication system
And device can do parallel calculation to two cell matrixs simultaneously.(the singular value decomposition operation and wide in addition, operation that the present invention is all
Adopted triangle decomposition) it can all be realized by CORDIC, to save a large amount of and complicated division and multiplying, also save many hardware
Resource achievees the purpose that save power consumption.
Above embodiments are described using multiple angles.Obviously teaching here can be presented in many ways, and in example
Any certain architectures or function disclosed are only a representative situation.According to the teaching of this paper, anyone skilled in the art
It should be understood that independently different presentations can be made using other certain patterns or comprehensive a variety of patterns in content presented herein.It illustrates
It is bright, it can be realized in accordance with any mode is noted above using certain device or some way.The implementation of one device or a kind of mode
Execution can with any other framework or functionality, again or framework and functionality are realized previously discussed a kind of or more
In kind pattern.
Those skilled in the art will be appreciated that information and signal can be showed with a variety of different science and technology and skill.Citing, above
Describe all data that may be referred to, instruction, order, information, signal, position, symbol and chip (chip) can volt,
Electric current, electromagnetic wave, magnetic field or magnetic grain, light field or light bead or any of the above combination are presented.
In addition, a variety of various illustrative logical blocks, mould group and circuit and various situations disclosed herein can be real
It applies in integrated circuit (integrated circuit, IC), access terminal, access point；Or by integrated circuit, access terminal, deposit
Take an execution.Integrated circuit can by general service processor, digital signal processor (digital signal processor,
DSP), specific integrated circuit (application specific integrated circuit, ASIC), field programmable gate
Array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate (discrete
Gate) or transistor logic (transistor logic), discrete hardware component, electronic component, optical element, mechanical organ,
Or any above combined design is to complete the function of describing in this text；And it may execute and be present in integrated circuit, collection
The actuating code or instruction all having outside at circuit, or both.General service processor may be microprocessor, it is also possible to being any
Conventional processors, controller, microcontroller or state machine.Processor can be made of the combination of computer equipment, such as: number
The combination of signal processor (DSP) and a micro computer, multiple groups micro computer, one group to multiple groups micro computer and a Digital Signal Processing
Device core or any other similar configuration.
Herein any specific order of disclosed program or the step of being layered it is pure be an example way.Based in design
Preference, it is necessary to which the step of recognizing any specific order in program or layering can be in the range disclosed by this file by again
It arranges.Adjoint claim to a method shows the element of various steps with demonstration example sequence, also therefore should not be of the invention
The particular order or stratum that specification is shown are limited.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention, any this field
Technical staff, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, therefore protection of the invention
Range, which is worked as, to be regarded subject to defined in the attached claims.
Claims (6)
1. a kind of method for limiting power distribution in a wireless communication system characterized by comprising
One singular value decomposition operation is executed to an access matrix, and obtains pair of horns matrix, wherein the diagonal matrix is by more
A cell matrix is formed；And
It is decomposed respectively using a Generalized Triangular simultaneously by a upper left corner cell matrix and a lower right corner cell matrix according to a sequence
Diagonal entry in the diagonal matrix is converted to the diagonal entry of a specified diagonal line vector in parallel；
Wherein the singular value decomposition operation and Generalized Triangular decomposition are by an at least coordinate rotation digital computer
CORDIC operation realized, and using the vector pattern in the CORDIC operation by the upper left corner cell matrix and described
Lower right corner cell matrix starts to convert all diagonal element matrixes in parallel as a upper triangular matrix；
The diagonal entry in the diagonal matrix is wherein converted into a specified diagonal line vector in parallel according to the sequence
Diagonal entry includes:
Remaining diagonal element matrix conversion is upper three by foundation one upper left to bottom right sequence by the upper left corner cell matrix
Angular moment battle array；And
Remaining diagonal element matrix conversion is upper three by foundation one bottom right to upper left sequence by the lower right corner cell matrix
Angular moment battle array；
The step of wherein being converted by the upper left corner cell matrix and the lower right corner cell matrix is to run parallel, until described
Until diagonal entry in diagonal matrix is converted to the diagonal entry of the specified diagonal line vector.
2. the method as described in claim 1, which is characterized in that all diagonal entries of the specified diagonal line vector are absolute
The product of value is equal to the product of all diagonal entry absolute values of the diagonal matrix.
3. the method as described in claim 1, which is characterized in that the cell matrix is one 2 × 2 matrixes.
4. a kind of communication device in wireless communication system characterized by comprising
Reprogrammable rotation digital computer CORDIC circuit, further includes:
An at least CORDIC element to execute a singular value decomposition operation to an access matrix, and obtains pair of horns matrix,
Described in diagonal matrix be made of multiple cell matrixs, and decomposed using a Generalized Triangular respectively while by a upper left corner
Diagonal entry in the diagonal matrix is converted to one according to a sequence by cell matrix and a lower right corner cell matrix in parallel
The diagonal entry of specified diagonal line vector；
Wherein the CORDIC element is to use an at least CORDIC operation to realize the singular value decomposition operation and described wide
Adopted triangle decomposition, and using the vector pattern in the CORDIC operation by the upper left corner cell matrix and the lower right corner
Cell matrix starts to convert all diagonal element matrixes in parallel as a upper triangular matrix；And
Wherein the diagonal entry in the diagonal matrix is converted to a finger according to the sequence by the CORDIC element in parallel
The diagonal entry for determining diagonal line vector includes:
The CORDIC element is to diagonal by remaining according to a upper left to bottom right sequence by the upper left corner cell matrix
Cell matrix is converted to upper triangular matrix；And
Remaining diagonal element matrix conversion is upper three by foundation one bottom right to upper left sequence by the lower right corner cell matrix
Angular moment battle array；
The step of wherein being converted by the upper left corner cell matrix and the lower right corner cell matrix is to run parallel, until described
Until diagonal entry in diagonal matrix is converted to the diagonal entry of the specified diagonal line vector.
5. communication device as claimed in claim 4, which is characterized in that all diagonal entries of the specified diagonal line vector
The product of absolute value is equal to the product of all diagonal entry absolute values of the diagonal matrix.
6. communication device as claimed in claim 4, which is characterized in that the cell matrix is one 2 × 2 matrixes.
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| CN101626283A (en) * | 2009-08-06 | 2010-01-13 | 西安电子科技大学 | Uniform channel decomposition method for vertical layered space-time coding communication system |
| CN102315912A (en) * | 2010-07-01 | 2012-01-11 | 华为技术有限公司 | Method for providing pre-encoding matrix, method for providing decoding matrix and base station |
| CN102684766A (en) * | 2012-05-28 | 2012-09-19 | 重庆大学 | Low-complexity precoding method for downlink multi-user multiple-input multiple-output (MIMO) system |
| CN103220033A (en) * | 2013-05-13 | 2013-07-24 | 电子科技大学 | Method for parallelizing matrix channels of two-way relay MIMO (Multiple Input Multiple Output) system |
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| CN101626283A (en) * | 2009-08-06 | 2010-01-13 | 西安电子科技大学 | Uniform channel decomposition method for vertical layered space-time coding communication system |
| CN102315912A (en) * | 2010-07-01 | 2012-01-11 | 华为技术有限公司 | Method for providing pre-encoding matrix, method for providing decoding matrix and base station |
| CN102684766A (en) * | 2012-05-28 | 2012-09-19 | 重庆大学 | Low-complexity precoding method for downlink multi-user multiple-input multiple-output (MIMO) system |
| CN103220033A (en) * | 2013-05-13 | 2013-07-24 | 电子科技大学 | Method for parallelizing matrix channels of two-way relay MIMO (Multiple Input Multiple Output) system |
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