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Cognitive-Cooperative Non-Orthogonal Multiple Access Method in Half-Duplex Mode

A technology of non-orthogonal multiple access and working mode, applied in the field of cognitive-cooperative non-orthogonal multiple access, can solve problems such as low throughput and achieve the effect of good system performance

Active Publication Date: 2022-07-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low throughput when the existing NOMA method shares resources, and the present invention provides a cognitive-cooperative non-orthogonal multiple access method under a half-duplex working mode

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  • Cognitive-Cooperative Non-Orthogonal Multiple Access Method in Half-Duplex Mode

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comparative approach H

[0180] 1. The system throughput in the two transmission modes obtained by the present invention is obviously better than that of the comparison schemes HD-CNOMA and COMA.

[0181] 2. By adopting the spectrum detection technology, the present invention ensures that the relay user accurately learns the surrounding environment, makes full use of the objectively existing spectrum holes, and obtains better system performance.

[0182] 3. The cooperative structure of the present invention enables edge users and relay users to achieve a win-win situation, that is, edge users are assisted by relay users, and relay users have the opportunity to access frequency bands originally belonging to edge users. Although the invention has been described herein with reference to specific embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should therefore be understood that many modifications may be made to the...

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Abstract

In order to solve the problem of low throughput when the existing NOMA method shares resources, the present invention provides a cognitive-cooperative non-orthogonal multiple access method in a half-duplex working mode, which belongs to the technical field of information and communication. The present invention includes: edge users D who need to be assisted 2 According to its own needs, to relay user D 1 broadcast its own signal with the base station; the relay user calculates the detection threshold λ for energy detection according to the preset false alarm probability HD ; The relay user performs uninterrupted spectrum detection on the signal of the edge user, and obtains the detection statistic y ED ; if y ED >λ HD , then it is determined that the edge user exists, the relay user decodes the received signal of the edge user, and sends the information that the relay user and the edge user want to transmit to the base station in the form of NOMA superimposed signal; The power of the base station transmits its own signal; the base station performs maximum ratio combining of the signals of the direct link and the relay link, and decodes the combined result.

Description

technical field [0001] The invention relates to the technical field of information and communication, in particular to a cognitive-cooperative non-orthogonal multiple access method using spectrum detection technology in a half-duplex working mode. Background technique [0002] In the past few decades, the mobile communication network has experienced the development from the first generation mobile communication system to the fourth generation mobile communication system. communication between. In the process from 1G to 4G, the communication business has gradually developed from the voice call business to the data communication business. Especially in the 4G system, the main purpose of people's use of mobile communication networks is not only to make calls with others, but to digitally communicate with others, share information or obtain information of their own interest through data applications. Examples include browsing the web for news information, etc. In the 4G syste...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04W52/34H04B17/382H04L1/00H04L5/16
CPCH04B17/382H04L1/0048H04L5/16H04W16/14H04W52/346Y02D30/70
Inventor 贾敏王欣玉郭庆顾学迈刘晓锋
Owner HARBIN INST OF TECH