Uplink multiuser interference suppression method based on non-orthogonal multiple access

A multi-user interference, non-orthogonal multiple access technology, applied in the field of wireless communication networks, can solve the problems of limited system capacity, interference, users are no longer completely orthogonal, so as to reduce interference, improve system and rate, and improve reception. The effect of signal-to-interference noise ratio

Active Publication Date: 2016-10-12
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 orthogona

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  • Uplink multiuser interference suppression method based on non-orthogonal multiple access
  • Uplink multiuser interference suppression method based on non-orthogonal multiple access
  • Uplink multiuser interference suppression method 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 new type The multiple access method enables multiple user signals to be transmitted on the same time-frequency resource on the same space layer, and N antennas are configured for the base station, and the cell base station uses the same time-frequency resource to provide services for M users, where M is greater than The number of base station antennas is N, and M users are divided into N groups, M=KN, where K is the number of users in each user group; all users on the user group occupy the same time-frequency resources on the same space layer. as shown in the picture 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 ...

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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 ...

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Application Information

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IPC IPC(8): H04B7/04H04L25/03
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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