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User fair power distribution method based on downlink NOMA system

An allocation method and user technology, applied in the field of NOMA system, can solve problems such as ignoring throughput, high complexity, and not considering user fairness, and achieve the effect of improving usability, reducing complexity, and ensuring fairness

Active Publication Date: 2021-06-08
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0002] At present, the academic community has researched many methods to improve the user throughput of the NOMA system. These methods either only consider maximizing the throughput of a single user, ignoring the improvement of the overall throughput of the system, or the system performance is the best, but the The complexity is too high, or it aims to maximize the total throughput of multiple users, without considering the fairness of users, and it is very likely to allocate less power to users with poor channel gain

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  • User fair power distribution method based on downlink NOMA system
  • User fair power distribution method based on downlink NOMA system
  • User fair power distribution method based on downlink NOMA system

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[0051] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, but not to limit the invention.

[0052] Since NOMA is a power domain multiple access technology, power allocation is a key issue. The power level of each user will not only affect the throughput performance of the user itself, but also have a great impact on the throughput performance of other users in the superimposed signal, and then affect the overall performance of the system. Different user power allocation algorithms will also have a great impact on the accuracy of decoding at the receiving end, because when the receiving end uses the SIC algorithm to eliminate interference, it needs to regard the post-decoded ...

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Abstract

The invention discloses a user fair power distribution method based on a downlink NOMA system. The method comprises: dividing JK users in the same cell into K user clusters according to user positions, wherein each user cluster comprises J users; distributing a sub-channel for each user cluster, wherein the sub-channels of each user cluster are mutually orthogonal; according to the total channel gain of the users of each user cluster, performing a linear water injection algorithm to calculate the power of each user cluster; and after the power of each user cluster is determined, carrying out power distribution of the users in the cluster, i.e., firstly, ensuring the minimum transmission rate of the users in the cluster in an OMA mode under the same channel condition, then averagely distributing the residual power to each user, and fairly improving the data transmission rate of the users. According to the invention, the transmission rate of each user can be fairly improved under the condition of ensuring the rate when the user adopts the OMA mode under the same channel condition, and the fairness of the user is ensured.

Description

technical field [0001] The invention relates to the field of NOMA systems, in particular to a user power distribution method for ensuring user fairness in the NOMA system. Background technique [0002] At present, the academic community has researched many methods to improve the user throughput of the NOMA system. These methods either only consider maximizing the throughput of a single user, ignoring the improvement of the overall system throughput, or the system performance is the best, but the The complexity is too high, or it aims to maximize the total throughput of multiple users, without considering the fairness of users, and it is very likely to allocate less power to users with poor channel gain. Contents of the invention [0003] In view of the above problems, the present invention provides a user fair power allocation method based on the downlink NOMA system. [0004] The present invention comprises the following steps: [0005] Step 1: Divide J×K users in the c...

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Application Information

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IPC IPC(8): H04W72/04H04W72/08
CPCH04W72/0473H04W72/543H04W72/53H04W72/542
Inventor 孙文胜吴启辉朱讯赵莹莹
Owner HANGZHOU DIANZI UNIV
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