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Multi-cell large-scale MIMO system user dual-antenna pilot frequency interference elimination method

A pilot interference and system user technology, applied in diversity/multi-antenna systems, transmission systems, radio transmission systems, etc., and can solve problems such as increased signal-to-interference and noise ratio

Inactive Publication Date: 2016-08-03
SHANGHAI JIAO TONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

In some special scenarios, this method can improve performance, but usually because the number of users served is reduced, even if the SINR of a specific user is increased, it will not help

Method used

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  • Multi-cell large-scale MIMO system user dual-antenna pilot frequency interference elimination method
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  • Multi-cell large-scale MIMO system user dual-antenna pilot frequency interference elimination method

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Embodiment Construction

[0078] 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 changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0079] In the example provided by the present invention, the cellular radius is set to 1000m, the user exclusion radius range is set to 500m, the cell edge signal-to-noise ratio SNR is 20dB, the pilot sequence length τ is set to 10, the antenna spacing D is set to half a wavelength, and the carrier frequency F It is 2GHz, the number of multipaths P is 50, the path loss factor is set to 3, and the user arrival angle spread is set to 20 degrees.

[0080]The invention provides a method for eliminating dual...

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Abstract

The invention provides a multi-cell large-scale MIMO system user dual-antenna pilot frequency interference elimination method. Pilot frequency pollution of an uplink and interference in the data transmission process of a downlink are alleviated by considering spatial correlation and controlling the beam forming weight vector of a user side. Meanwhile, pilot frequency distribution is introduced to the method, and a pilot frequency distribution strategy based on a greedy algorithm is put forward so that influence caused by pilot frequency pollution is further alleviated through combination of a user dual-antenna device, and thus the objectives of reducing channel estimation error and enhancing system speed can be achieved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for eliminating dual-antenna pilot interference for users of a multi-cell massive MIMO system. Background technique [0002] In recent years, with the rapid development of wireless communication technology, people's requirements for the performance of wireless communication systems are also increasing. Realizing a mobile communication network with high speed, high stability and low power consumption to meet people's increasing needs is both an opportunity and a challenge for researchers. [0003] At present, the research on the fifth generation (Fifth Generation, 5G) wireless communication network is in full swing, and it is expected that the 5G system will be deployed and commercialized by 2020. In the 5G system, there are many key technologies that are focused on research. Among them, the massive multiple-input multiple-output technology (Multip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B1/7107H04B7/04H04B7/08
CPCH04B1/707H04B1/7107H04B7/0413H04B7/0845H04B2201/70701
Inventor 邵晓康蒋铃鸽何晨
Owner SHANGHAI JIAO TONG UNIV
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