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Method for controlling node transmitting power of full duplex bidirectional relay system

A relay node and transmission power technology, applied in the field of wireless communication, can solve the problem of low energy consumption in full-duplex cooperative diversity systems

Active Publication Date: 2020-01-31
NANTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It should be noted that for energy efficiency issues, half-duplex systems are more considered in the industry, and there are relatively few studies on energy consumption of full-duplex cooperative diversity systems.

Method used

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  • Method for controlling node transmitting power of full duplex bidirectional relay system
  • Method for controlling node transmitting power of full duplex bidirectional relay system
  • Method for controlling node transmitting power of full duplex bidirectional relay system

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Embodiment Construction

[0076] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0077] see figure 1 , the present invention adopts a superposition coded full-duplex two-way relay system node transmission power control method. In the relay system, there are three nodes, namely two source nodes and one relay node, all of which work in frequency non-selective Rayleigh fading Full-duplex mode in a channel environment. Among them, S 1 and S 2 is the source node, and R is the decoding and forwarding relay node located between the source nodes. Each node in the system can obtain accurate channel state information through channel estimation. Using channel knowledge and according to the data rate requirements of the source node, the transmit power of the source node and the relay node transmitter and the superposition coding power allocation factor at the relay node are dynamically adjusted. Under the condition of meeting the p...

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Abstract

The invention discloses a method for controlling the node transmitting power of a full duplex bidirectional relay system, which is suitable for a decoding and forwarding full duplex bidirectional relay system adopting superposition coding. The method aims to minimize the node transmitting power sum by taking the QoS requirement of the system and the limitation of superposition coding power distribution factor values as constraint conditions. By utilizing channel knowledge and according to the requirement of a source node on a data rate, the transmitting power of transmitters of the source nodeand a relay node and a superimposed coded power distribution factor at the relay node are dynamically adjusted, and the sum of the transmitting power of the nodes is minimized under the condition ofmeeting the QoS requirement of a system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for controlling node transmission power of a full-duplex two-way relay system using superposition coding, which is applicable to a full-duplex two-way relay system based on a decoding and forwarding mechanism. Background technique [0002] As a new technology, cooperative diversity can improve the coverage area of ​​wireless networks and resist the adverse effects of channel fading on wireless signal transmission through cooperation among users. It has been highly valued by academia and industry. A traditional three-node cooperative diversity system includes two source nodes and a relay node. Due to the influence of factors such as communication distance or channel fading, the two source nodes must use the relay node to communicate with each other. The so-called two-way relay system. In a traditional three-node cooperative diversity system, the relay node...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/26H04W52/18H04W52/46H04W72/04H04W72/08H04W72/54
CPCH04W52/265H04W52/18H04W52/267H04W52/46H04W72/0473H04W72/543
Inventor 吉晓东
Owner NANTONG UNIVERSITY
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