CN106452529B - A kind of user's matching method based on non-orthogonal multiple system - Google Patents

A kind of user's matching method based on non-orthogonal multiple system Download PDF

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CN106452529B
CN106452529B CN201610866002.8A CN201610866002A CN106452529B CN 106452529 B CN106452529 B CN 106452529B CN 201610866002 A CN201610866002 A CN 201610866002A CN 106452529 B CN106452529 B CN 106452529B
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user
signal
base station
noise ratio
channel
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CN106452529A (en
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赵力强
郭成
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Xidian University
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Xidian University
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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
    • H04B7/0417—Feedback 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
    • H04B7/0413—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
    • H04B7/06—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
    • 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
    • H04B7/0619—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 using feedback from receiving side
    • H04B7/0621—Feedback content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power

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

Abstract

The present invention relates to a kind of user's matching methods based on non-orthogonal multiple system, it is the following steps are included: (1), base station send superposed signal to multiple users, user is according to the signal-to-noise ratio for sending superposed signal to calculate channel received, and periodically to the signal-to-noise ratio of the respective channel of base station feedback；(2), after base station obtains the signal-to-noise ratio of multiple user feedbacks, according to the multiple signal-to-noise ratio computation user average signal-to-noise ratios received；(3), power distribution is fixed by non-orthogonal multiple in base station；(4), the handling capacity of near-end user and remote subscriber is calculated separately；(5), near-end user handling capacity R is calculatediWith the handling capacity R of remote subscriberjRatio Di,j, then by Di,jWith pre-set user rate otherness threshold value D0It compares, if Di,j≥D0, near-end user and remote subscriber are classified as pre-selection pairing user Si,j={ ui,uj}；(6), base station calculates the channel relevancy ρ that user is matched in pre-selection pairing user groupi,j, then basisThe user for selecting pairing, to generate final pairing user group.

Description

A kind of user's matching method based on non-orthogonal multiple system
Technical field
The invention belongs to the 5th third-generation mobile communication technical field, in particular to a kind of user based on non-orthogonal multiple system Matching method.
Background technique
Realization for multiuser multiplexing in mobile cellular net, 2G network is using time division multiple acess (Time Division Multiple Access, TDMA) technology, 3G network is using CDMA (Code Division Multiple Access, CDMA) technology, 4G network is using orthogonal frequency division multiple access (Orthogonal Frequency Domain Multiple Access, OFDMA) technology.Wherein the multiuser multiplexing in 2G, 3G, 4G network be time domain, code domain, frequency domain into Row.However, future 5G needs the equipment connection number of higher spectrum efficiency and magnanimity, non-orthogonal multiple (Non- Orthogonal Multiple Access, NOMA) technology is suggested in 5G, to meet the needs of future communications.
The basic thought of non-orthogonal multiple is to be superimposed multiple users in power domain, passes through serial interference elimination in receiving end (Successive Interference Cancellation, SIC) separates subscriber signal.It is more compared to orthogonal frequency in 4G Location, non-orthogonal multiple have the following advantages: (1) non-orthogonal multiple can be compatible with the orthogonal frequency division multiple access of 4G；(2) non-orthogonal multiple benefit With the base station path loss difference different to user, the signal of multiple users is overlapped, to improve signal gain；(3) Non-orthogonal multiple can allow the user of same cell using same frequency band, and then improve spectrum efficiency and equipment connection number；(4) Non-orthogonal multiple is not necessarily to know the channel state information (Channel State Information, CSI) of each channel, thus Better performance can be obtained under high-speed mobile scene.
Non-orthogonal multiple system is an interference-limited system, therefore multi-user can not be allowed to participate in same wave beam Which user interior non-orthogonal multiple selects match, and handles up interference and inter-beam interference, lifting system in wave beam is reduced Amount has a major impact: in non-orthogonal multiple system, biggish two users of channel gain otherness being matched, Ke Yiti The information rate with rate and single user of high system.
Summary of the invention
Goal of the invention: the present invention has made improvements in view of the above-mentioned problems of the prior art, i.e., the invention discloses one kind User's matching method based on non-orthogonal multiple system.
A kind of technical solution: user's matching method based on non-orthogonal multiple system, comprising the following steps:
(1), base station sends superposed signal to multiple users, and user send signal and noise in superposed signal according to what is received Ratio calculates the signal-to-noise ratio of channel, and periodically to the signal-to-noise ratio of the respective channel of base station feedback；
(2), it is average according to the multiple signal-to-noise ratio computation users received after base station obtains the signal-to-noise ratio of multiple user feedbacks Signal-to-noise ratio；
(3), power distribution is fixed by non-orthogonal multiple in base station, is averaged noise when the signal-to-noise ratio of user is greater than user Than when, the user be near-end user, proximally user distribute send power 20%；When the signal-to-noise ratio of user is average less than user When signal-to-noise ratio, which is remote subscriber, distributes to remote subscriber and sends the 80% of power；
(4), the handling capacity of near-end user and remote subscriber is calculated separately, calculation formula is as follows:
Wherein:
RiIndicate the handling capacity of near-end user；
RjIndicate the handling capacity of remote subscriber；
hiChannel of the expression base station to user i；
wiIndicate the beamforming vector of user i；
piThe power of user i is distributed in expression；
hjChannel of the expression base station to user j；
wkIndicate the beamforming vector of user k；
pjThe power of user j is distributed in expression；
ρ indicates transmitting terminal signal-to-noise ratio；
(5), near-end user handling capacity R is calculatediWith the handling capacity R of remote subscriberjRatio Di,j, in which:
Di,j=Ri/Rj；
Again by Di,jWith pre-set user rate otherness threshold value D0It compares, if Di,j≥D0, by near-end user and distal end User is classified as pre-selection pairing user Si,j={ ui,uj, all pre-selection pairing user groups are Gi,j=∪ Si,j,
(6), base station calculates the channel relevancy ρ that user is matched in pre-selection pairing user groupi,j, then basis The user of pairing is selected, so that final pairing user group is generated,
Wherein:
Wherein:
hiChannel of the expression base station to user i；
hjChannel of the expression base station to user j；
ρi,jIndicate the channel relevancy of pairing user.
The utility model has the advantages that a kind of user's matching method based on non-orthogonal multiple system disclosed by the invention is with beneficial below Effect:
1, the spectrum efficiency of system and the handling capacity of user are effectively improved；
2, the complexity for reducing user's matching method, reduces Time Delay of Systems；
3, replace channel gain otherness by user throughput otherness, avoid subscriber channel under mimo channel Gain sequencing problem；
4, final pairing user is determined using channel relevancy, effectively reduces inter-beam interference problems.
Detailed description of the invention
Fig. 1 is a kind of flow chart of user's matching method based on non-orthogonal multiple system disclosed by the invention.
Specific embodiment:
Detailed description of specific embodiments of the present invention below.
As shown in Figure 1, a kind of user's matching method based on non-orthogonal multiple system, comprising the following steps:
(1), base station sends superposed signal to multiple users, and user send signal and noise in superposed signal according to what is received Ratio calculates the signal-to-noise ratio of channel, and periodically to the signal-to-noise ratio of the respective channel of base station feedback；
(2), it is average according to the multiple signal-to-noise ratio computation users received after base station obtains the signal-to-noise ratio of multiple user feedbacks Signal-to-noise ratio；
(3), power distribution is fixed by non-orthogonal multiple in base station, is averaged noise when the signal-to-noise ratio of user is greater than user Than when, the user be near-end user i, proximally user i distribution send power 20%；When the signal-to-noise ratio of user is flat less than user When equal signal-to-noise ratio, which is remote subscriber j, distributes to remote subscriber j and sends the 80% of power；
(4), the handling capacity of near-end user i and remote subscriber j are calculated separately, calculation formula is as follows:
Wherein:
RiIndicate the handling capacity of near-end user i；
RjIndicate the handling capacity of remote subscriber j；
hiChannel of the expression base station to near-end user i；
wiIndicate the beamforming vector of near-end user i；
piIndicate the power of i-th of user distribution；
hjChannel of the expression base station to remote subscriber j；
wkIndicate the beamforming vector of user k；
pjThe power of remote subscriber j is distributed in expression；
ρ indicates transmitting terminal signal-to-noise ratio；
(5), near-end user handling capacity R is calculatediWith the handling capacity R of remote subscriberjRatio Di,j, in which:
Di,j=Ri/Rj；
Again by Di,jWith pre-set user rate otherness threshold value D0It compares, if Di,j≥D0, by near-end user i and far End subscriber j is classified as pre-selection pairing user Si,j={ ui,uj, all pre-selection pairing user groups are Gi,j=∪ Si,j,
(6), base station calculates the channel relevancy ρ that user is matched in pre-selection pairing user groupi,j, then basis The user of pairing is selected, so that final pairing user group is generated,
Wherein:
Indicate ρi,jThe value of i when being maximized, j,
Wherein:
hiChannel of the expression base station to user i；
hjChannel of the expression base station to user j；
ρi,jIndicate the channel relevancy of pairing user.
Embodiments of the present invention are elaborated above.But present invention is not limited to the embodiments described above, Technical field those of ordinary skill within the scope of knowledge, can also do without departing from the purpose of the present invention Various change out.

Claims (1)

1. a kind of user's matching method based on non-orthogonal multiple system, which comprises the following steps:
(1), base station sends superposed signal to multiple users, and user is according to the ratio for sending signal and noise in superposed signal received The signal-to-noise ratio of channel is calculated, and periodically to the signal-to-noise ratio of the respective channel of base station feedback；
(2), it after base station obtains the signal-to-noise ratio of multiple user feedbacks, is averaged noise according to the multiple signal-to-noise ratio computation users received Than；
(3), power distribution is fixed by non-orthogonal multiple in base station, when the signal-to-noise ratio of user is greater than user's average signal-to-noise ratio When, which is near-end user, and proximally user, which distributes, sends the 20% of power；Averagely believe when the signal-to-noise ratio of user is less than user Make an uproar than when, the user be remote subscriber, to remote subscriber distribute send power 80%；
(4), the handling capacity of near-end user and remote subscriber is calculated separately, calculation formula is as follows:
Wherein:
RiIndicate the handling capacity of near-end user；
RjIndicate the handling capacity of remote subscriber；
hiChannel of the expression base station to user i；
wiIndicate the beamforming vector of user i；
piThe power of user i is distributed in expression；
ρ indicates transmitting terminal signal-to-noise ratio；
(5), near-end user handling capacity R is calculatediWith the handling capacity R of remote subscriberjRatio Di,j, in which:
Di,j=Ri/Rj；
Again by Di,jWith pre-set user rate otherness threshold value D0It compares, if Di,j≥D0, by near-end user and remote subscriber It is classified as pre-selection pairing user Si,j={ ui,uj, all pre-selection pairing user groups are Gi,j=∪ Si,j,
(6), base station calculates the channel relevancy ρ that user is matched in pre-selection pairing user groupi,j, then basisSelection The user of pairing, so that final pairing user group is generated,
Wherein:
Wherein:
hiChannel of the expression base station to user i；
hjChannel of the expression base station to user j；
ρi,jIndicate the channel relevancy of pairing user.
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CN107466097B (en) * 2017-03-15 2020-08-28 中山大学 Power distribution method of non-orthogonal multiple access system
CN107612669B (en) * 2017-09-12 2020-03-31 西安交通大学 User pairing method for non-orthogonal multiple access system
CN109787666B (en) * 2017-11-10 2021-04-20 中兴通讯股份有限公司 Frequency domain scheduling method, device and equipment
CN108809626A (en) * 2018-05-30 2018-11-13 北京安如山文化科技有限公司 A kind of whitepack SM4 cryptographic algorithms scheme and system
CN109450503B (en) * 2018-11-16 2020-11-24 北京航空航天大学 Non-orthogonal multiple access fairness transmission method for air-space array communication
CN109586773B (en) * 2018-11-16 2020-05-08 北京航空航天大学 Wave beam forming and power distribution method for combining transmitting and receiving end by using space-air communication millimeter wave non-orthogonal multiple access technology
CN112243222B (en) * 2019-07-17 2021-10-29 大唐移动通信设备有限公司 MU-MIMO multi-terminal UE pairing method and device
CN110932764B (en) * 2020-02-12 2020-06-02 南京邮电大学 User matching and power distribution method of MIMO-NOMA downlink communication system

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