Multi-domain joint hybrid non-orthogonal multiple access model framework and resource allocation scheme

A non-orthogonal multiple access and resource allocation technology, applied in the field of hybrid non-orthogonal multiple access model framework and resource allocation scheme, can solve problems such as error propagation and signal generation with decoding, and increase the number of device accesses , reduce the computational complexity, improve the effect of the system spectral efficiency

Active Publication Date: 2021-06-11
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, once a decoding error occurs in the SIC receiver, the remaining decoded signal will also have problems, resulting in error propagation

Method used

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  • Multi-domain joint hybrid non-orthogonal multiple access model framework and resource allocation scheme
  • Multi-domain joint hybrid non-orthogonal multiple access model framework and resource allocation scheme
  • Multi-domain joint hybrid non-orthogonal multiple access model framework and resource allocation scheme

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Embodiment Construction

[0061] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0062] like figure 1 As shown, there is one base station and multiple users in the uplink hybrid NOMA system, both the base station and the users are equipped with a single antenna, and the base station supports two groups of users at the same time, that is, 2J users. Among these two groups of users, the user with relatively large channel gain in the group is defined as the near user J S ={j:j=1,...,j s}, define the user whose channel gain is relatively small in the group as the far user J W ={j:j=1,...,j w}. A total of K orthogonal subcarriers are available to users, and each user passes d f subcarriers to transmit information. The SCMA encoder logs user information through a predefined codebook 2 M bits are mapped to weights d f The K-dimensional code word. Define the codebook of the jth user as B J ={x j,1 ,...,x j,M}, where x j,m is a K×1-dimensio...

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Abstract

The invention discloses a multi-domain joint hybrid non-orthogonal multiple access model framework and a resource allocation scheme, which comprise the following two stages: in the first stage, a dynamic codebook allocation method is utilized to carry out subcarrier allocation on far and near user groups, and far and near user groups are paired; in the second stage, MPA and SIC joint detection is used, and the optimal power distribution scheme with the maximum total rate of the system is obtained. According to the invention, improvement is made on the basis of a traditional non-orthogonal multiple access system, and a new multi-domain joint hybrid non-orthogonal multiple access model framework is provided. Compared with a traditional model, the new model greatly increases the equipment access number and expands the system capacity. The invention further provides a resource allocation scheme based on the model framework, subcarrier allocation is carried out by utilizing a dynamic codebook allocation method, user pairing and power control optimization are combined, the system spectrum efficiency is further improved, MPA and SIC joint detection is used at a receiving end, and the calculation complexity is reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-domain combined hybrid non-orthogonal multiple access model framework and a resource allocation scheme. Background technique [0002] The 5th generation (5G) and future mobile communications are receiving keen attention. The three major application scenarios of 5G, enhanced mobile broadband (eMBB), massive machine-type communications (mMTC) and ultra-reliable and low-latency communications (uRLLC), are important to Spectral efficiency, connection density, and reliability of the system present enormous challenges. The traditional Orthogonal Multiple Access (OMA) scheme is difficult to meet the massive access requirements. The Non-Orthogonal Multiple Access (NOMA) scheme, as one of the strong candidates for the future mobile communication multiple access scheme, can meet the requirements of the future Requirements for mass access and ultra-large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W52/26H04W52/34
CPCH04W72/0453H04W72/0473H04W52/267H04W52/346H04W72/53
Inventor 孙君阮健豪
Owner NANJING UNIV OF POSTS & TELECOMM
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