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Beam forming method for uplink MIMO-NOMA wireless communication system

A MIMO-NOMA, wireless communication system technology, applied in the field of wireless mobile communication

Pending Publication Date: 2019-10-01
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0007] The present invention is an uplink MIMO-NOMA wireless communication system beamforming method, which is used to solve the problem of uplink beamforming in a multi-cell MIMO-NOMA wireless communication system

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  • Beam forming method for uplink MIMO-NOMA wireless communication system

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Embodiment Construction

[0032] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection authority of the present invention is not limited to the following implementation example. Based on any embodiment of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention is a beamforming method of an uplink MIMO-NOMA wireless communication system based on multidimensional Lagrangian dual transformation and multidimensional secondary transformation; figure 1 As shown, there are three cells in the MIMO-NOMA wireless communication system, and one base station in each cell serves multiple users at the same time. Each base station and users use mu...

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Abstract

Disclosed in the present invention is a beam forming method for an uplink MIMO-NOMA wireless communication system, and the method is suitable for uplink beam forming of multi-cell multi-user MIMO-NOMAwireless communication system. The method comprises the following steps: applying Lagrangian dual conversion and secondary conversion to maximize the total rate of the system to obtain an expressionof a Lagrangian auxiliary factor and a secondary conversion auxiliary vector; for the converted convex optimization problem, applying a Lagrangian multiplier method to obtain an expression of a beam forming vector; and with the maximum total system rate as a target, applying iterative operation to obtain a beam forming vector of each user. Compared with a traditional uplink power distribution method, the method has the advantages that the good total system rate can be obtained, and the system performance of the NOMA is superior to that of an orthogonal multiple access system.

Description

technical field [0001] The invention relates to a communication signal transmission method in the field of wireless mobile communication, in particular to a beamforming method of an uplink multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) wireless communication system. Background technique [0002] Non-Orthogonal Multiple Access (NOMA) is considered to be the key technology of the fifth generation mobile communication. The basic idea of ​​non-orthogonal multiple access technology is to use superposition coding at the transmitting end to transmit information of multiple users on the same time and frequency resources; at the receiving end to use serial interference self-cancellation technology (Successive Interference Cancellation; SIC) to decode. Multiple-Input Multiple-Output (MIMO) technology can transmit multiple data streams at the same time, and the combination of MIMO technology and NOMA system can further improve system transmission rate and sp...

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Application Information

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IPC IPC(8): H04B7/06H04B7/0413
CPCH04B7/0617H04B7/0413Y02D30/70
Inventor 徐友云申瑞娟王小明
Owner NANJING UNIV OF POSTS & TELECOMM
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