Robustness combined signal processing method of source end and relay end of relay system

A processing method and a technology for combining signals, which are applied in radio relay systems, active electrical relay systems, transmission systems, etc., and can solve problems such as no in-depth research.

Inactive Publication Date: 2013-08-21
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0009] To sum up, the existing technology has not conducted in-depth research on solving the situation where there are eavesdropping users in the relay system and th

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  • Robustness combined signal processing method of source end and relay end of relay system
  • Robustness combined signal processing method of source end and relay end of relay system
  • Robustness combined signal processing method of source end and relay end of relay system

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Embodiment Construction

[0073] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0074] The wireless communication system of this embodiment includes a source transmitter, two relay nodes, a legal user receiver and an eavesdropping user receiver. The number of antennas on each source transmitter is 2, that is, M=2, and the number of antennas on each relay node is 1. The number of antennas for both legitimate user and eavesdropping user receivers is 1. In this embodiment, the source transmitter sends signals to the user receiver through each relay node. The number of streams ...

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Abstract

The invention provides a robustness combined signal processing method of a source end and a relay end of a relay system. The method includes the following steps: transmitting a training sequence to a relay by the source end, carrying out channel estimation and obtaining an estimated channel from the source end to the relay by the relay, transmitting the training sequence to a user side by the relay, carrying out channel estimation and obtaining an estimated channel from the relay to a legal user by the legal user, carrying out channel estimation and obtaining an estimated channel from the relay to an eavesdropping user and a channel error variance by the eavesdropping user, feeding the channel information back to a relay node by a user side, transmitting the channel information to a central processing unit by the relay node, performing an iterative algorithm on a pre-code of the source end and a pre-code of the relay by the central processing unit, transmitting the computed pre-codes to the relay node by the central processing unit, feeding the pre-code of the source end back to the source end by the relay, modulating transmitted signals and transmitting the signals to the relay by the source end, pre-processing the signals and then broadcasting the signals to the users by the relay, and detecting the received signals by the legal user. The method promotes safety performance of the system.

Description

technical field [0001] The present invention relates to a method in the field of wireless communication, in particular to a method for robust joint signal processing of a source end and a relay end of a relay system based on a security rate. Background technique [0002] The application of the relay system in the wireless communication system can improve the performance of the system, and has been widely used in the fourth generation of wireless communication standards. For example, 3GPP (3rd Generation Partnership Project, third-generation mobile communication partnership project) LTE-A (Long Term Evolution-Advanced, enhanced long-term evolution) system introduces wireless relay technology to reduce the space loss of wireless links and increase Large signal-to-noise ratio, thereby improving channel capacity for edge users. In this way, the distance between the antenna and the terminal user is shortened, and the link quality of the terminal can be improved, thereby increasi...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/15H04L1/00
Inventor 黄剑张萌薛瑞琦秦熠俞晖罗汉文
Owner SHANGHAI JIAO TONG UNIV
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