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Self-interference eliminating method in two way full-duplex MIMO relay communication system

A self-interference cancellation, full-duplex technology, applied in the field of communication, can solve the problems of system capacity performance damage, no self-interference, and no consideration of system capacity performance.

Active Publication Date: 2017-01-04
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

The disadvantage of these two methods is that they are all based on the assumption that the self-interference between the source node and the destination node of the full-duplex is small enough, but there is no real suppression of the self-interference between the source node and the destination node of the system.
However, because this method only considers how to suppress the self-interference of the system, but does not take into account the capacity performance of the system, the capacity performance of the system is damaged

Method used

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Embodiment Construction

[0037] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] refer to figure 1 , the scenario used in the present invention includes a first source node, a second source node and a relay node, each node is equipped with multiple antennas, wherein the number of transmitting antennas of the two source nodes is 6, and the number of receiving antennas is 4, The number of transmitting antennas of the relay node is the same as the number of receiving antennas of the relay node, and the first source node, the second source node, and the relay node all work in full-duplex mode. The channel parameter from the first source node to the relay node is denoted as H 1r , the channel parameter from the relay node to the first source node is expressed as H r1 , the channel parameter from the second source node to the relay node is expressed as H 2r , the channel parameter from the relay node to the second s...

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Abstract

The invention discloses a self-interference eliminating method in a two way full-duplex MIMO relay communication system. The method aims at addressing the problem of neglecting system capacity property while taking into consideration of minimizing self-interference of prior art. The method includes the following steps: 1. estimating channel parameters; 2. designing the transmission of a first source node, receiving a beam forming matrix to eliminate the self-interference of the first source node; 3. designing the transmission of a second source node, receiving a beam forming matrix to eliminate the self-interference of the second source node; 4. and designing the transmission of a relay node, receiving a beam forming matrix to eliminate the self-interference of the relay node, and at the same time selecting the transmission that conform to conditions, and receiving a beam forming matrix and maximizing the system capacity. According to the invention, the method eliminates the self-interference of the relay node as well as the self-interference of the two source nodes, can maximize the system capacity while eliminating self-interference, and can be used in distributed cooperation transmission system of future fifth generation of wireless mobile communication.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for eliminating self-interference in a full-duplex communication system, which can be used in a distributed cooperative transmission system of the fifth-generation wireless mobile communication in the future, and can improve two-way communication while eliminating full-duplex self-interference. The capacity of a full-duplex MIMO relay communication system. Background technique [0002] In the two-way full-duplex MIMO relay communication system, by using the relay node to forward the signal of the source node and the signal of the destination node, the spatial diversity gain similar to that of the MIMO system can be obtained, so that the destination node and the source node can communicate effectively . The working mode of the relay node is divided into half-duplex HD mode and full-duplex FD mode. When the relay node adopts the half-duplex HD mode, the relay ...

Claims

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Application Information

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IPC IPC(8): H04B1/52H04L25/03
CPCH04B1/525H04L25/03006
Inventor 刘毅朱芳美吴炯陈甜甜张海林
Owner XIDIAN UNIV
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