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Orthogonal frequency division multiplexing (OFDM) co-frequency co-time full duplex relaying method

An orthogonal frequency division, relay node technology, applied in the field of communication, can solve the problems of reducing the performance of the full-duplex system, increasing the processing delay and complexity of the relay node, etc.

Active Publication Date: 2015-12-23
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that the remaining loop interference after the loop interference elimination in the full-duplex cooperative system will still reduce the performance of the full-duplex system
The disadvantage of this method is that: due to the asynchronous space-time code encoding and decoding method used in the full-duplex system and the need to cancel the remaining loop interference, the processing delay and complexity of the relay node are increased

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  • Orthogonal frequency division multiplexing (OFDM) co-frequency co-time full duplex relaying method
  • Orthogonal frequency division multiplexing (OFDM) co-frequency co-time full duplex relaying method
  • Orthogonal frequency division multiplexing (OFDM) co-frequency co-time full duplex relaying method

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[0037]The present invention will be further described below with reference to the accompanying drawings.

[0038] refer to figure 1 , the method of the present invention is in figure 1 realized under the scenario. exist figure 1 Among them, the source node and the destination node are equipped with one antenna, and the relay node is equipped with two antennas. The source node uses half-duplex mode to transmit signals, the destination node uses half-duplex mode to receive signals, and the relay node uses full-duplex mode. Receive and send signals. figure 1 f in represents the channel parameters from the source node to the relay node, figure 1 h in represents the relay node loop channel parameter, figure 1 The g in represents the channel parameter from the relay node to the destination node. The source node sends a signal to the relay node in each time slot, and the relay node uses amplification and forwarding to amplify and forward the received signal, and the destination...

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Abstract

The present invention discloses an orthogonal frequency division multiplexing (OFDM) co-frequency co-time full duplex relaying method, which solves the problem that the complexity of a relay node is increased due to processing remaining loop interference in the prior art. The method of the present invention comprises the steps of: (1) estimating parameters of a channel; (2) modulating a source signal by a source node; (3) forwarding an emission signal of the source node by the relay node; (4) receiving the emission signal of the relay node by a destination node; and (5) decoding a receiving signal by the destination node. The method of the present invention has the advantage of simplifying the processing procedure of the relay node, improves the signal interference noise ratio of the receiving end of the destination node to the maximum possible extent, reduces the complexity of the relay node, and improves the reliability of a full duplex relay cooperative communication system.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) simultaneous co-frequency full-duplex relay method in the technical field of full-duplex cooperative communication. The invention can be used in a distributed cooperative transmission system of wireless mobile communication in the future, and improves the reliability and spectrum utilization rate of the cooperative communication system. Background technique [0002] In a cooperative communication system, by using multiple relay nodes to forward the signal of the source node, the spatial diversity gain similar to that of the MIMO system can be obtained, which is called cooperative diversity. The working mode of the relay node can be divided into full-duplex mode and half-duplex mode. When the relay node adopts the half-duplex mode, the relay node can only be limited to th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/155H04L25/02H04L27/26
CPCH04B7/15585H04L25/025H04L27/2601
Inventor 刘毅张悦陈甜甜康策张海林李勇朝
Owner XIDIAN UNIV
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