IRS-NOMA system beam forming optimization method based on SDR

An IRS-NOMA and beamforming technology, applied in the field of data processing, can solve problems such as inability to ensure effective channel alignment and inflexible communication scenarios

Active Publication Date: 2021-06-08
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The above research is generally based on a single-cluster IRS-NOMA system, which is not flexible enough to face actual communication scenarios, and most of them use intra-cluster power allocation, which cannot guarantee that the channels of all users in the cluster can be effectively aligned

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  • IRS-NOMA system beam forming optimization method based on SDR
  • IRS-NOMA system beam forming optimization method based on SDR
  • IRS-NOMA system beam forming optimization method based on SDR

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Embodiment Construction

[0067] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0068] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to an IRS-NOMA system beam forming optimization method based on SDR, and belongs to the field of data processing. The method comprises the following steps: S1, allocating a beam to each of all users, and distinguishing different users according to the power; S2, establishing a system model and a QoS problem model; and S3, iteratively solving a beam forming vector and a phase shift matrix by using an alternative optimization idea. According to the invention, an NOMA downlink beam forming algorithm assisted by an intelligent reflecting surface is researched. Compared with a traditional NOMA system, the model provided by the invention has more loose requirements on channel conditions, and is suitable for more general user non-uniform clustering scenes. In order to improve the energy efficiency of the IRS-NOMA network, the invention provides a joint optimization algorithm based on SDR to minimize the transmitting power. Simulation results show that the SDR algorithm has significant advantages when the requirement for the target rate is high.

Description

technical field [0001] The invention belongs to the field of data processing, and relates to an IRS-assisted NOMA system beamforming joint optimization method. Background technique [0002] Non-orthogonal multiple access (NOMA) is a key technology for next-generation wireless communication systems to improve spectrum utilization, balance user fairness, and expand network connections. [1][2] . NOMA applies superposition coding (superposition coding, SC) and successive interference cancellation (successive interference cancellation, SIC) on the transmitter and receiver respectively, and uses power domain multiplexing to share communication resources between all users, which is an answer to traditional orthogonal multiple access. An important extension of technology (orthogonal multiple access, OMA). The NOMA system allocates transmission power according to the priority of users. Users with higher priority are allocated more power, so it has better fairness, even for users wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617Y02D30/70H04B7/04013
Inventor 李国权张辉李国军徐勇军林金朝庞宇
Owner CHONGQING UNIV OF POSTS & TELECOMM
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