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Optimal Power Allocation Method Based on Fairness and Spectrum Efficiency

A technology of spectral efficiency and allocation method, applied in the field of power allocation based on fairness and optimal spectral efficiency, can solve problems such as the research of unallocated power allocation algorithm, and achieve the goal of improving the reachable data rate, improving the solution efficiency, and achieving the highest system spectral efficiency. excellent effect

Active Publication Date: 2022-04-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

For example, researchers have proposed corresponding power allocation algorithms in terms of optimal Energy-Efficient and maximizing the minimum achievable data rate of users. However, in the existing research literature, there is no fairness Research on the power allocation algorithm in the downlink NOMA-RS from the perspective of

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  • Optimal Power Allocation Method Based on Fairness and Spectrum Efficiency
  • Optimal Power Allocation Method Based on Fairness and Spectrum Efficiency
  • Optimal Power Allocation Method Based on Fairness and Spectrum Efficiency

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Embodiment

[0021] In order to better illustrate the technical solution of the present invention, a downlink half-duplex (Half-Duplex, HD) amplify-and-forward (Amplify-and-Forward, AF) NOMA-RS model is briefly described first.

[0022] figure 1 It is a structural schematic diagram of the downlink half-duplex amplifying and forwarding NOMA-RS model in the present invention. Such as figure 1 shown, assuming the base station via relay Communicate with M×N users, where the base station The number of transmit antennas is N S ,relay The number of transmit antennas is N R , all users are single-antenna, then there are N S ≥N R ≥1. M×N users are randomly assigned to M clusters, and the number of users in each cluster is N, with the symbol Denotes the nth user in the mth cluster, where m∈{1,...,M}, n∈{1,...,N}. base station to relay distance between and relay to user The distance between the symbol d SR ampersand Indicates that α represents the path loss coefficient. ba...

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Abstract

The present invention discloses a power allocation method based on fairness and optimal spectrum efficiency, and constructs an optimization problem by setting the constraints of each user's allocated transmission power, the constraints of the attainable data rate, and the constraints of the signal-to-noise ratio Solve the optimal allocated transmission power as the allocated transmission power of each user in the downlink NOMA-RS system. For the specific solution of the optimal allocation of transmission power, the present invention designs an iterative optimization method, which simplifies the solution process and improves the solution efficiency. Adopting the present invention can effectively improve the accessible data rate of the user in the downlink NOMA-RS system, and ensure the fairness of the user data rate, so that the spectrum efficiency of the system can be optimized.

Description

technical field [0001] The invention belongs to the technical field of NOMA communication systems, and more specifically relates to a power allocation method based on fairness and optimal spectrum efficiency. Background technique [0002] Non-orthogonal Multiple Access (NOMA) is a hot technology of 5G. NOMA is different from the previous Orthogonal Multiple Access-relaying system (OMA). NOMA uses a non-orthogonal power domain to distinguish users. The so-called non-orthogonal means that data between users can be transmitted at the same time. slot, transmit on the same frequency point, and only rely on the difference in power to distinguish users. [0003] As an effective means to further improve the performance and coverage of mobile communication systems, NOMA-based relaying system (NOMA-based relaying system, NOMA-RS) has attracted more and more researchers' attention. [0004] According to research, in the downlink NOMA-RS, the power allocation scheme between users has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04W72/0473H04W72/53Y02D30/70
Inventor 阎啸杨凯王茜何羚秦开宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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