A virtual full-duplex relay transmission method based on half-duplex multi-path cooperative system

A technology of a cooperative system and a transmission method, applied in the field of virtual full-duplex relay transmission, can solve problems such as waste of spectrum resources, and achieve the effects of improving spectrum utilization and ensuring diversity gain.

Active Publication Date: 2016-04-13
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

In other words, the source can only transmit one signal to the sink every two time slots, resulting in a serious waste of spectrum resources

Method used

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  • A virtual full-duplex relay transmission method based on half-duplex multi-path cooperative system
  • A virtual full-duplex relay transmission method based on half-duplex multi-path cooperative system
  • A virtual full-duplex relay transmission method based on half-duplex multi-path cooperative system

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0019] figure 1 Shown is a schematic diagram of a system model of a virtual full-duplex multipath relay channel (virtualfull-duplex MPRC, VDF-MPRC) in the present invention. Such as figure 1 Shown, where S represents the source; R 1 , R 2 ,...,R N Represents N relay nodes; D represents the sink; R b Indicates the selected relay node with the best channel condition; x S (t) represents the ...

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Abstract

The invention discloses a virtual full-duplex relay transmission method based on a half-duplex multipath cooperative system, and belongs to the technical field of wireless cooperative communication. The virtual full-duplex relay transmission method based on the half-duplex multipath cooperative system includes the following steps: N relay nodes are added between an information source S and an information sink D to build multi-path relay channels, among all relay nodes capable of successfully decoding a source signal, a relay node with the best channel conditions is selected through a corresponding algorithm to forward the decoded signal, and at the same time, the information source generates a new signal, and transmits the signal to the rest of relay nodes. Thus, in each time slot, the information source can transmit a new signal without waiting for a signal of the last time slot to be relayed and forwarded, thereby realizing virtual all-duplex relay transmission. The virtual full-duplex relay transmission method makes a simulation analysis of interrupt performance, and compared with conventional multi-path relay channels, the method improves the spectrum efficiency of the multi-path relay channels while ensuring a diversity gain, thereby improving performance of a whole system.

Description

technical field [0001] The invention belongs to the technical field of wireless cooperative communication, and more specifically relates to a virtual full-duplex relay transmission method based on a half-duplex multi-path cooperative system. Background technique [0002] Cooperative relay transmission is a multi-antenna technology. The diversity gain obtained based on this technology can significantly improve the transmission reliability of wireless links, and can effectively expand the coverage of communication systems. In view of this, cooperative relay transmission technology is considered to be a method that can effectively resist the fading characteristics of wireless channels. [0003] The traditional relay channel is to add a single relay node between the source S and the sink D to improve the transmission quality. In order to obtain higher diversity gain to further improve the reliability and transmission quality of wireless communication systems, in A.Bletsas, H.Sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/14H04B7/155
CPCH04B7/155H04L5/1438
Inventor 李强张蔡霞余曼丽葛晓虎
Owner HUAZHONG UNIV OF SCI & TECH
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