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A method for suppressing uplink multi-user interference based on non-orthogonal multiple access

A technology of multi-user interference and non-orthogonal multiple access, applied in the field of wireless communication network, can solve the problems of limiting system capacity, inter-user interference, improvement, etc., so as to reduce interference, improve system and rate, and improve reception signal-to-interference-noise ratio. Effect

Active Publication Date: 2019-05-21
TSINGHUA UNIV
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Problems solved by technology

The new multiple access technology breaks the traditional concept of orthogonal multiple access, so that users are no longer completely orthogonal, and thus introduces more interference between users, which seriously hinders the normal transmission of users. Limit system capacity increase

Method used

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  • A method for suppressing uplink multi-user interference based on non-orthogonal multiple access
  • A method for suppressing uplink multi-user interference based on non-orthogonal multiple access
  • A method for suppressing uplink multi-user interference based on non-orthogonal multiple access

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Embodiment Construction

[0022] The method for suppressing uplink multi-user interference based on non-orthogonal multiple access proposed by the present invention includes the following steps:

[0023] (1) In the uplink of the wireless communication network, through a new multiple access method, multiple user signals can be transmitted on the same time-frequency resource on the same space layer, N antennas are configured for the base station, and the cell base station Use the same time-frequency resource to provide services for M users, where M is greater than the number of base station antennas N, divide M users into N groups, M=KN, where K is the number of users in each user group; all users on the user group Users occupy the same time-frequency resources on the same spatial layer. Such as figure 1 As shown, it can be simplified to a traditional multiple-input multiple-output (MIMO) system, so that interference between user groups can be eliminated through existing interference management methods....

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Abstract

The invention relates to an uplink multiuser interference suppression method based on non-orthogonal multiple access, and belongs to the technical field of wireless communication networks. The method suppresses interferences between users by respectively designing a pre-coding matrix and an interference suppression matrix at a transmitting end and a receiving end, so as to improve the reception signal-to-interference-and-noise-ratio of the users, and further enhance the system capacity. The scheme proposed by the invention inherits the advantages of an interference alignment technology, and the interference alignment technology is flexibly applied to a new scene of novel non-orthogonal multiple access. At the transmitting end, signal spaces of the users are aligned to an interference suppression space through the pre-coding matrix, so that the signal spaces of the users are closer; and at the receiving end, a base station can reduce the interferences between the users through a simple interference suppression matrix, and the interferences between the users are further reduced through a sequential serial interference.

Description

technical field [0001] The invention relates to a method for suppressing uplink multi-user interference based on non-orthogonal multiple access, and belongs to the technical field of wireless communication networks. Background technique [0002] Since the birth of wireless communication in the 1980s, it has experienced explosive development for more than 30 years, and the number of mobile users has also increased dramatically. The user's demand for higher service quality and larger data volume is also increasing, and the corresponding requirement for bandwidth is also increasing. At present, the existing orthogonal multiple access technology requires users to perform orthogonal transmission in the time domain, frequency domain, code domain, etc., which limits the number of users to access to a certain extent and further improves the utilization rate of the system spectrum. 5G not only needs to greatly improve the spectrum utilization of the system, but also has the ability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0452H04B7/0456H04L25/03
CPCH04B7/0452H04B7/0456H04L25/03299
Inventor 粟欣曾捷孔丹容丽萍肖驰洋许希斌
Owner TSINGHUA UNIV
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