Transmission method for improving energy efficiency of NOMA cooperative communication system

A technology of energy efficiency and transmission method, applied in wireless communication, power management, electrical components, etc., can solve problems such as inability to derive energy efficiency expressions, inability to obtain global optimal solution, complex transmission model, etc.

Active Publication Date: 2021-01-22
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the transmission model studied is too complex to derive an accurate energy efficiency expression, so the proposed optimization algorithm cannot obtain the global optimal solution of the studied parameters

Method used

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  • Transmission method for improving energy efficiency of NOMA cooperative communication system
  • Transmission method for improving energy efficiency of NOMA cooperative communication system
  • Transmission method for improving energy efficiency of NOMA cooperative communication system

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Embodiment Construction

[0054] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0055] The technical solution adopted in this embodiment includes two parts. The first part is the relay-assisted NOMA cooperative cognitive communication transmission model and the spectrum sharing model diagram, and the second part is the optimal parameter acquisition method for maximizing system energy efficiency.

[0056] 1. Description of transmission model and transmission protocol model diagram

[0057] The energy harvesting cognitive radio network based on non-orthogonal multiple access technology considered in the present invention is as follows: figure 1 As shown, the base station BS provides information transmission services to the first receiving end U1 and the second receiving end U2 with the assistance of the relay node R,...

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Abstract

The invention discloses a transmission method for improving the energy efficiency of an NOMA cooperative communication system. The method employs an NOMA cooperative cognitive communication transmission model based on relay assistance for transmission according to a transmission protocol, and the cognitive communication transmission model comprises a base station, a first receiving end, a second receiving end, and a relay node for cooperative transmission. By assuming that all transmission channels are independent Rayleigh fading channels, according to the transmission protocol, any transmission time slot comprises a first transmission stage and a second transmission stage, in the first transmission stage, the base station sends superposed signals to the first receiving end and the secondreceiving end; and then the relay node also receives the superposed signals, and the superposed signal is segmented into two parts for energy collection and signal forwarding according to the energy segmentation proportion; thereby obtaining the optimal value of the power distribution factor and the energy segmentation proportion through a parameter obtaining optimization algorithm for maximizingthe energy efficiency of the system. The energy efficiency of the system can be improved to the maximum extent.

Description

technical field [0001] The invention belongs to the field of energy harvesting cognitive radio networks, and in particular relates to a transmission method for improving the energy efficiency of a NOMA cooperative communication system. Background technique [0002] With the rapid development of mobile communications and the Internet of Things (IoT), the demand for spectrum efficiency and system capacity has grown rapidly, and the traditional Orthogonal Multiple Access (OMA) access technology has been unable to meet user needs. Non-orthogonal multiple access (NOMA) access technology is considered as a multi-access technology with development potential, which can obtain more spectral efficiency by deploying ultra-dense networks, so it can be applied to support large machines under 5G systems communication scenarios. Different from traditional orthogonal multiple access technology, NOMA technology can effectively use the same transmission resources (such as: time, frequency an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W52/24H04W52/26
CPCH04W16/14H04W52/241H04W52/243H04W52/267Y02D30/70
Inventor 唐锟薛泉廖绍伟
Owner SOUTH CHINA UNIV OF TECH
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