Communication method based on bi-directional relay network coding system

A technology of network coding and communication method, applied in the field of communication based on two-way relay network coding system, it can solve problems such as no good, small average symbol error rate, etc., to avoid high computational complexity and avoid system non-convergence Effect

Inactive Publication Date: 2009-08-12
SOUTHEAST UNIV
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Problems solved by technology

[0006] How to make the two-way relay network coding system working in the direct amplification mode obtain the minimum system average symbol error rate under the given power constraints, there is no better way in the current open literature

Method used

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  • Communication method based on bi-directional relay network coding system
  • Communication method based on bi-directional relay network coding system
  • Communication method based on bi-directional relay network coding system

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Embodiment Construction

[0020] 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.

[0021] In the embodiment of the present invention, the signal processing method based on the two-way relay network coding system is as follows figure 1 shown.

[0022] In step 110, at first the definition of the average symbol error rate of the two-way relay system is given: 1 / (SNR UL +1)+1 / (SNR DL +1), and take the average symbol error rate of this two-way relay system as the optimization target of relay signal processing. Among them, SNR UL is the receiving signal-to-noise ratio of the base station, SNR DL is the received signal-to-noise ratio of the user.

[0023]Given the mathematical description of the relay optimal signal processing matrix to obtain the minimum system average symbol error rate under the given power condition, the problem of the relay op...

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Abstract

The invention relates to a communication method based on a two-way relay network coding system, which ensures that the two-way relay network coding system can acquire minimum average symbol error rate between a user and a base station through relay cooperation communication. In the method, the communication between the user and the base station is finished in two time slots; in the first time slot, a relay receives information sent by the user and the base station in a synchronous and same-frequency mode, and designs an optimal processing matrix according to the current channel information; in the second time slot, the relay sends a received signal multiplied by the processing matrix with optimal design to the user and the base station in the synchronous and same-frequency mode; and the user and the base station eliminate components of self-sending signals from the received signal respectively to obtain information which needs to be transmitted by the base station and the user.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a communication technology based on a two-way relay network coding system. Background technique [0002] Deploying a relay unit in a traditional communication system, transforming a one-hop communication process into a two-hop or multi-hop network communication can effectively improve the coverage, communication quality and invulnerability of the communication network. As a new technology, network coding has been widely used in broadband wireless communication networks. Through network coding, the relay end can encode the received information and send it out, improving the throughput and robustness of the communication network. [0003] The two-way relay-based communication system simplifies the four-slot communication process in the one-way relay system into a two-slot communication process. Since the one-way relay system needs to complete the communication between the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B7/14H04L1/00
Inventor 杨绿溪俞菲李春国
Owner SOUTHEAST UNIV
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