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Interference elimination method of wireless full duplex system

An interference elimination and full-duplex technology, which is applied in the field of communication, can solve the problems of affecting the interference elimination effect and reducing the expected signal, and achieve the effect of reducing computational complexity, improving interference elimination, and increasing the degree of freedom

Pending Publication Date: 2022-06-03
XIDIAN UNIV
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Problems solved by technology

In order to eliminate interference, interference alignment technology can be used to design a precoding matrix to eliminate interference. However, when the number of precoding matrices in the system is small, the designed precoding matrix eliminates less interference, and the receiving end will receive a lot of interference. To design the decoding matrix at the receiving end to eliminate the remaining interference, this will require the receiving end to use more antennas to deal with the interference, so that the received desired signal will be reduced, affecting the interference cancellation effect

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  • Interference elimination method of wireless full duplex system
  • Interference elimination method of wireless full duplex system
  • Interference elimination method of wireless full duplex system

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Embodiment Construction

[0044] The embodiments and effects of the present invention will be described in further detail below with reference to the accompanying drawings.

[0045] refer to figure 1 . The existing full-duplex system with two base stations and four user equipments includes two full-duplex base stations, two half-duplex uplink user equipments, and two half-duplex downlink user equipments. The uplink channel is an interference channel, and the downlink channel is an interference channel. for the X channel. in:

[0046] On the X channel: the first base station is in the downlink state The second base station is in the downlink state Both base stations provide the first downlink user equipment and the second downlink user equipment send data;

[0047] In interference channel: 1st uplink user equipment Give the first base station in the uplink state Send data signal; 2nd uplink user equipment Give the second base station in the uplink state send data;

[0048] figure 1 ,...

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Abstract

The invention provides an interference elimination method for a wireless full duplex system, and mainly solves the problem of poor interference elimination effect in the prior art. According to the scheme, system parameters of the full duplex network are set; the base station and the uplink user equipment respectively transmit data signals; the base station and the downlink user equipment obtain a receiving signal according to the transmitted data signal; for interference in received signals of user equipment and a base station, self-interference is directly eliminated through local information of the base station, and for other types of interference, precoding matrixes and decoding matrixes of the base station and the user equipment are solved through joint interference neutralization and interference alignment conditions; and the base station and the uplink user equipment send signals according to the solved precoding, and the base station and the downlink user equipment decode the received signals according to the solved decoding matrix, so that interference in the system is eliminated. Simulation results show that compared with an existing interference alignment method, the method has a better interference elimination effect and can be used for improving the network freedom degree of a wireless full duplex system.

Description

technical field [0001] The invention belongs to the field of communication technologies, and in particular relates to an interference elimination method, which can be used to improve the network freedom of a wireless full-duplex system. Background technique [0002] In the next five years, the mobile application market will have an increasingly strong demand for high-traffic services such as online games and high-definition video, resulting in a surge in mobile data traffic in hotspot areas. According to the Cisco Global Mobile Data Traffic Forecast Report, mobile data traffic will grow at a compound annual growth rate of 46% from 2017 to 2022, and by 2022, global mobile data traffic will increase by 7 times compared to 2017. In order to cope with such a huge flood of data, new architectures and technologies must be explored to improve the carrying capacity of wireless networks. [0003] The current 5G era has the characteristics of multiple access, modulation, duplex, high...

Claims

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Application Information

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IPC IPC(8): H04J11/00H04L5/14
CPCH04J11/005H04J11/0036H04L5/14Y02D30/70
Inventor 刘伟肖轶
Owner XIDIAN UNIV
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