Bidirectional relay transmission system and method

A transmission system, two-way relay technology, applied in transmission systems, digital transmission systems, radio relay systems, etc., can solve problems such as the reduction of system spectral efficiency

Inactive Publication Date: 2012-12-19
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

This one-way relay transmission method inevitably reduces the spectral efficiency of the system

Method used

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  • Bidirectional relay transmission system and method
  • Bidirectional relay transmission system and method
  • Bidirectional relay transmission system and method

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Embodiment Construction

[0046] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0047] figure 1 It is a system architecture diagram of a multi-user two-way relay transmission system of the present invention. like figure 1 As shown, the present invention is a multi-user two-way relay transmission system, which is based on the two-way relay transmission protocol, and is used for two-way information exchange between each user terminal, which includes: at least two user g...

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Abstract

The invention discloses a bidirectional relay transmission system and method. The transmission method comprises the following steps of: in the multiple access transmission time slot, all the users pre-code the signal vectors to be transmitted and simultaneously transmit the pre-coded information flow to a relay node; the relay node receives the signals and decodes the received signals based on physical layer network codes; and in the broadcast time slot, first relay-user joint pre-coding design is carried out and then the relay node broadcasts the pre-coded signals to all the users; and the users demodulate the received signals and extract the required signals according to the signals transmitted by themselves in the previous time slot. By adopting the system and the method, the multi-antenna X-shaped bidirectional transmission system which completes terminal information exchange of the two users in two time slots is realized, the degree of freedom of the system is maximized and the system performances are promoted.

Description

technical field [0001] The invention relates to a two-way relay transmission system and a transmission method thereof, in particular to a multi-antenna X-type two-way relay transmission system and a transmission method thereof. Background technique [0002] In a multi-user transmission network, it is common for multiple users to exchange information at the same time. However, due to the complex wireless transmission environment and multi-user transmission interference, the performance of each user's receiving end is often difficult to guarantee. This phenomenon is particularly prominent in wireless networks with large transmission space spans. As a result, various anti-fading and anti-jamming technologies have been continuously proposed. [0003] One of the effective solutions is to use relay nodes in the transmission link to assist the original end-to-end transmission. This wireless transmission scheme based on relay nodes solves the problem of transmission reliability w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04B7/15
Inventor 向铮铮陶梅霞
Owner SHANGHAI JIAO TONG UNIV
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