CN107276648B - A kind of extensive MIMO base station power determining method - Google Patents

A kind of extensive MIMO base station power determining method Download PDF

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Publication number
CN107276648B
CN107276648B CN201710573014.6A CN201710573014A CN107276648B CN 107276648 B CN107276648 B CN 107276648B CN 201710573014 A CN201710573014 A CN 201710573014A CN 107276648 B CN107276648 B CN 107276648B
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power
base station
represent
extensive mimo
radio frequency
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CN107276648A (en
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葛晓虎
孙扬
韩涛
李强
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Huazhong University of Science and Technology
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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
    • H04B7/0426—Power distribution
    • 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
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a kind of extensive MIMO base station power determining method, the described method includes：The power of communications of extensive MIMO base station is determined by the power of power amplifier and the power of radio frequency link；The calculating power of extensive MIMO base station is determined by the power of the power of channel estimation, the power of channel coding and linear process；The general power of extensive MIMO base station is determined by the constant power of the power of communications, the calculating power and extensive MIMO base station.Compared with the definite method of existing total base station power, the present invention considers calculating power, can more reasonably determine extensive MIMO base station general power.

Description

A kind of extensive MIMO base station power determining method
Technical field
The invention belongs to wireless communication technology field, more particularly, to a kind of extensive MIMO base station power side of determining Method.
Background technology
Multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) is one kind in wireless communication system The middle wireless communication technique using more antenna transceiving datas, the information transmitted is formed more height by Space Time Coding and believed by it Breath stream, and launched by more antennas.Extensive MIMO technology increases dual-mode antenna on the basis of conventional MIMO system To dozens or even hundreds of.Extensive mimo system remains conventional MIMO system as a kind of new wireless communication technique Advantage, the increase of antenna amount so that power system capacity greatly increases therewith, determines that extensive mimo system has hair well Exhibition prospect.
At the same time, as antenna amount increases, bandwidth expands, and compared to MIMO base station, extensive MIMO base station is used for The power of the computing functions such as linear process dramatically increases：For microcell base station, the main base band for performing computing function is consumed Power account for more than the 40% of general power, even macro base station, also account for more than 10%.Therefore using the power of traditional MIMO base station The method of determining cannot obtain accurately extensive MIMO base station general power.
Therefore, under extensive MIMO scene, the definite method for finding base station power is the problem of industry urgent need to resolve.
The content of the invention
For the disadvantages described above or Improvement requirement of the prior art, object of the present invention is to provide a kind of extensive MIMO Base station power determines method, and the extensive MIMO base station for thus solving to obtain using traditional MIMO base station power determining method is total The not reasonable technical problem of power.
To achieve the above object, one side according to the invention, there is provided a kind of extensive MIMO base station power determines Method, including：
(1) power of communications of extensive MIMO base station is determined by the power of power amplifier and the power of radio frequency link；
(2) extensive MIMO bases are determined by the power of the power of channel estimation, the power of channel coding and linear process The calculating power stood；
(3) determined on a large scale by the power of communications, the constant power for calculating power and extensive MIMO base station The general power of MIMO base station.
Preferably, step (1) specifically includes：
(1.1) byDetermine the power of power amplifier, wherein, α is power amplifier Efficiency, BRFFor base station radio-frequency pre-coding matrix, bBB,kFor base station baseband pre-coding matrix BBBKth row, K represent base station base band Data flow number；
(1.2) by PRF=NRFPRF_per_chainDetermine the power of radio frequency link, wherein, NRFRepresent radio frequency link quantity, PRF_per_chainRepresent the power of single radio frequency link；
(1.3) by the power P of power amplifierPAAnd the power P of radio frequency linkRFDetermine the logical of extensive MIMO base station Believe power：Pcommunication=PPA+PRF。
Preferably, step (2) specifically includes：
(2.1) byDetermine channel estimation Power, wherein, NrayRepresent the quantity of subchannel, κ represents the number of the base station precoding vector that each stage uses in wave beam training Amount, N represent the quantity of the discrete point taken when launch angle quantifies,Represent average channel signal-to-noise ratio, δ represents channel estimation error Probability, GBS(s) beam gain in s stages in wave beam training is represented, andCsRepresent normaliztion constant, NTRepresent the antenna amount of extensive MIMO base station；
(2.2) byDetermine the power of channel coding, wherein, PCODFor the efficiency of channel coding, RkTable Show the speed that k-th of user can reach；
(2.3) by PLP=PLP_BB+PLP_RFDetermine the power of linear process, wherein, PLP_BBRepresent the work(of base band precoding Rate, PLP_RFRepresent the power of radio frequency precoding；
(2.4) power by the power of the channel estimation, the power of the channel coding and the linear process is true The calculating power of fixed extensive MIMO base station：Pcomputation=PCE+PCD+PLP。
Preferably, in formula PLP=PLP_BB+PLP_RFIn,PLP_RF=NshifterPshifter, its In, NRFFor radio frequency link quantity, LBSFor base station computational efficiency, NshifterRepresent the quantity of radio-frequency phase shifter, PshifterRepresent single The power of a radio-frequency phase shifter.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show Beneficial effect：Base station communication power is obtained by power amplifier and radio frequency link power, then passes through channel estimation power, channel Code power and linear process power obtain base station and calculate power, finally plus constant power, obtain total base station power.With it is existing The definite method for having total base station power is compared, and the present invention considers calculating power, can more reasonably determine extensive MIMO Total base station power.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of extensive mimo system disclosed by the embodiments of the present invention；
Fig. 2 is a kind of flow diagram of extensive MIMO base station power determining method disclosed by the embodiments of the present invention；
Fig. 3 (a) represents the extensive MIMO base station various pieces power of submatrix array structure with the change of antenna amount；
Fig. 3 (b) represents the extensive MIMO base station various pieces power of full connection structure with the change of antenna amount；
Fig. 3 (c) compares change of full connection structure and submatrix the array structure base station communication power with antenna amount；
Fig. 3 (d) compares full connection structure and submatrix array structure base station and calculates change of the power with antenna amount.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below Not forming conflict each other can be mutually combined.
It is as shown in Figure 1 a kind of structure diagram of extensive mimo system disclosed by the embodiments of the present invention, considers single small The extensive mimo system of area multi-user, extensive mimo system is using mixing precoding.There are K any active ues, each user All it is single antenna.Base station has K base-band data stream to flow into, equipped with NRFRoot radio frequency link.Base station shares NTRoot antenna.In this hair In bright, we only consider the downlink of base station.
In extensive MIMO scene, constant can not be ignored or be set to again by calculating power.The present invention divides the power of base station For the power for communication, power and other constant powers for calculating.
Ptotal=Pcommunication+Pcomputation+Pfix (1)
Wherein, PtotalRepresent total base station power, PcommunicationRepresent base station communication power, PcomputationRepresent base station meter Calculate power, PfixRepresent base station constant power.
It is illustrated in figure 2 a kind of flow signal of extensive MIMO base station power determining method disclosed by the embodiments of the present invention Figure, comprises the following steps：
S1, the power of communications for determining by the power of power amplifier and the power of radio frequency link extensive MIMO base station；
Wherein, the power of communications P of extensive MIMO base stationcommunicationCan be by the power P of power amplifierPAAnd penetrate The power P of frequency linkRFDetermine：
Pcommunication=PPA+PRF (2)
Power on power amplifier can be determined by following formula：
Wherein, α be power amplifier efficiency, BRFFor base station radio-frequency pre-coding matrix, bBB,kFor base station baseband precoding Matrix BBBKth row；
Power on radio frequency link can be determined by following formula：
PRF=NRFPRF_per_chain (4)
Wherein, NRFRepresent radio frequency link quantity, PRF_per_chainRepresent the power of single radio frequency link.
Then the power of communications of extensive MIMO base station can be expressed as：
S2, by the power of the power of channel estimation, the power of channel coding and linear process determine extensive MIMO bases The calculating power stood；
In view of the purposes of power, the embodiment of the present invention locates the power of channel estimation, the power of channel coding with linear Calculating power of the power of reason as extensive MIMO base station：
Pcomputation=PCE+PCD+PLP (6)
Wherein, PCERepresent the power of channel estimation, PCDRepresent the power of channel coding, PLPRepresent the power of linear process.
The channel estimation methods that the present invention is trained using wave beam, the power of channel estimation can represent the number as subchannel Amount is multiplied by the power of single footpath channel estimation, and the power of channel estimation can be determined by following formula：
Wherein, NrayRepresent the quantity of subchannel, κ represents the base station precoding vector that each stage uses in wave beam training Quantity, N represents the quantity of discrete point taken when launch angle quantifies,Represent average channel signal-to-noise ratio, δ represents channel estimation The probability of mistake, GBS(s) beam gain in s stages in wave beam training is represented, andCsRepresent that normalization is normal Number, NTRepresent the antenna amount of extensive MIMO base station.
In down channel, base station carries out channel coding.The power of channel coding should be directly proportional with speed, the work(of channel coding Rate can be expressed as：
Wherein, PCODFor the efficiency of channel coding, RkRepresent the speed that k-th of user can reach.
In embodiments of the present invention, linear process refers to the precoding of transmitting terminal, is divided into base band precoding and radio frequency prelists Code two parts calculate, and can be expressed as：
PLP=PLP_BB+PLP_RF (9)
Wherein, PLP_BBRepresent the power of base band precoding, PLP_RFRepresent the power of radio frequency precoding.
For base band precoding, its power can be expressed as the floating-point operation number for being used for base band precoding in 1 second γprecodingDivided by base station computational efficiency LBS, i.e.,：
(10) the floating-point operation number γ in formulaprecodingIt can be expressed as the floating-point operation that a sub-baseband precoding is carried out Number ο is multiplied by the number ν of the precoding of unit interval progressprecoding, i.e.,：
γprecoding=ο νprecoding (11)
Wherein, ο represents the floating-point operation number that a sub-baseband precoding is carried out, νprecodingRepresent what the unit interval carried out The number of precoding.
In embodiments of the present invention, a sub-baseband precoding can handle K character at the same time, in order to reach total speedBase band precoding operation times ν per secondprecodingIt can be expressed as：
(11) ο in formula, is produced in the multiplication of base band pre-coding matrix and signal vector.At base band end, NRF×K The floating-point operation number that is multiplied by needed for the baseband signal vectors of K × 1 of base band pre-coding matrix be 2NRFK.So ο can be written as：
ο=2NRFK (13)
Comprehensive (10) (11) (12) (13), can obtain the power of base band precoding：
For radio frequency precoding, completed by the radio-frequency phase shifter of radio-frequency head.Therefore, the power of radio frequency precoding can Antenna amount is multiplied by be expressed as the power of a radio-frequency phase shifter.Allow PshifterRepresent the power of a radio-frequency phase shifter, NshifterRepresent the quantity of radio-frequency phase shifter, then the power of radio frequency precoding can be expressed as：
PLP_RF=NshifterPshifter (15)
Therefore, total linear process power can be expressed as：
Can obtain calculating power by formula (7) (8) (16) is：
S3, by power of communications, the constant power for calculating power and extensive MIMO base station determine extensive MIMO base station General power.
Wherein, the general power of extensive MIMO base station can be obtained by formula (1) (5) (17)：
As Fig. 3 (a) represents the extensive MIMO base station various pieces power of submatrix array structure with the change of antenna amount, figure 3 (b) represents the extensive MIMO base station various pieces power of full connection structure with the change of antenna amount, full Fig. 3 (c) is compared Connection structure and submatrix array structure base station communication power with antenna amount change, full Fig. 3 (d) compares connection structure and submatrix Array structure base station calculates change of the power with antenna amount.It can be seen that the proportion for calculating general power shared by power can not be ignored, And change with the change of antenna amount.Therefore, in the calculating of total base station power, consider that it is necessary to calculate power.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., should all include Within protection scope of the present invention.

Claims (2)

  1. A kind of 1. extensive MIMO base station power determining method, it is characterised in that including：
    (1) power of communications of extensive MIMO base station is determined by the power of power amplifier and the power of radio frequency link；
    (2) extensive MIMO base station is determined by the power of the power of channel estimation, the power of channel coding and linear process Calculate power；
    (3) extensive MIMO is determined by the power of communications, the constant power for calculating power and extensive MIMO base station The general power of base station；
    Step (1) specifically includes：
    (1.1) byDetermine the power of power amplifier, wherein, α is the efficiency of power amplifier, BRFFor base station radio-frequency pre-coding matrix, bBB,kFor base station baseband pre-coding matrix BBBKth row, K represent base station base band data Flow number；
    (1.2) by PRF=NRFPRF_per_chainDetermine the power of radio frequency link, wherein, NRFRepresent radio frequency link quantity, PRF_per_chainRepresent the power of single radio frequency link；
    (1.3) by the power P of power amplifierPAAnd the power P of radio frequency linkRFDetermine the communication work(of extensive MIMO base station Rate：Pcommunication=PPA+PRF；
    Step (2) specifically includes：
    (2.1) byDetermine the power of channel estimation, its In, NrayRepresent the quantity of subchannel, κ represents the quantity of the base station precoding vector that each stage uses in wave beam training, N tables Show the quantity of the discrete point taken when launch angle quantifies,Representing average channel signal-to-noise ratio, δ represents the probability of channel estimation error, GBS(s) beam gain in s stages in wave beam training is represented, andCsRepresent normaliztion constant, NTRepresent big The antenna amount of scale MIMO base station；
    (2.2) byDetermine the power of channel coding, wherein, PCODFor the efficiency of channel coding, RkRepresent kth The speed that a user can reach, K represent the base-band data stream number of base station；
    (2.3) by PLP=PLP_BB+PLP_RFDetermine the power of linear process, wherein, PLP_BBRepresent the power of base band precoding, PLP_RFRepresent the power of radio frequency precoding；
    (2.4) determined greatly by the power of the power of the channel estimation, the power of the channel coding and the linear process The calculating power of scale MIMO base station：Pcomputation=PCE+PCD+PLP。
  2. 2. according to the method described in claim 1, it is characterized in that, in formula PLP=PLP_BB+PLP_RFIn,PLP_RF=NshifterPshifter, wherein, NRFFor radio frequency link quantity, LBSFor base station computational efficiency, NshifterRepresent the quantity of radio-frequency phase shifter, PshifterRepresent the power of single radio frequency phase shifter, K represents the base band data of base station Flow number.
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Publication number Priority date Publication date Assignee Title
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CN104869626A (en) * 2014-10-17 2015-08-26 东南大学 Uplink large-scale MIMO system power control method based on receiver with low complexity
CN106416104A (en) * 2014-05-29 2017-02-15 索尼公司 Device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106416104A (en) * 2014-05-29 2017-02-15 索尼公司 Device
CN104113366A (en) * 2014-07-29 2014-10-22 北京邮电大学 Antenna selection method aiming at energy effectiveness of Massive MIMO (Multiple Input Multiple Output) communication system
CN104869626A (en) * 2014-10-17 2015-08-26 东南大学 Uplink large-scale MIMO system power control method based on receiver with low complexity

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