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Adaptive equivalent subcarrier allocation system and method for multi-user NOMA

A technology of subcarrier allocation and carrier allocation, which is applied in the field of mobile communication to achieve the effect of improving system performance

Inactive Publication Date: 2018-07-17
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art and solve the problem of how multi-user NOMA adaptively allocates equivalent subcarriers to improve transmission performance, the present invention provides a multi-user NOMA equivalent subcarrier allocation system and method, according to different user The rate situation is adaptive to allocate a reasonable number of equivalent subcarriers, so that the transmission performance can be improved

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  • Adaptive equivalent subcarrier allocation system and method for multi-user NOMA

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[0020] The structural principles and functional features of the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0021] figure 1 It is an OFDM technology resource allocation diagram. The smallest unit in the time domain is an OFDM symbol, and the smallest unit in the frequency domain is a subcarrier. Each resource unit is the resource plane area obtained by multiplying 1 subcarrier and 1 OFDM symbol. This is a two-dimensional planar resource bearing system, and no power domain is developed.

[0022] figure 2 It is a NOMA technical resource allocation diagram. The technical resource allocation revolves around the frequency domain, time domain and power domain. It is a three-dimensional resource bearing system. The corresponding frequency domain and time domain planes are the same as the OFDM resource plane. Domain, that is, the basic unit on the freq...

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Abstract

The invention discloses an adaptive equivalent subcarrier allocation system and method for multi-user NOMA. The method and system include: providing equivalent subcarriers with similar transmission characteristics by using an equal-interval subcarrier block diversity method; according to the gain information of each user on each subcarrier, obtaining the gain information of each user on each equivalent subcarrier in the NOMA system; determining the number of equivalent subcarriers required by the user to transmit data according to a channel gain amplitude threshold value accepted by the user;allocating the equivalent subcarriers by using an irrigation principle. The method can meet the requirements of different user rates, and can also adaptively allocate the equivalent subcarriers to improve transmission performance.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a multi-user non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA) adaptive equivalent subcarrier allocation system and method. Background technique [0002] With the development of mobile communication systems, users have higher and higher requirements for high-speed and high-quality data transmission. Therefore, it is particularly important to provide high-quality data transmission services for more users in limited wireless communication resources. As one of the key technologies of 5G, NOMA technology has attracted widespread attention due to its higher spectrum utilization. The NOMA system adopts non-orthogonal transmission that allocates user transmit power at the transmitting end, actively introduces interference information, and eliminates interference at the receiving end through the SIC receiver to achieve correct demodulation. NOMA technolog...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00
CPCH04L5/0008H04L5/0094
Inventor 张晓光孙彦景杨悦郭柯芦楠楠云霄陈功骁
Owner CHINA UNIV OF MINING & TECH
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