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A Pilot Assignment Method for Large-Scale Antenna System

A large-scale antenna and pilot distribution technology, applied in the field of communication, can solve problems such as high time complexity and not applicable to actual scenarios, and achieve the effect of improving uplink and speed and good pilot pollution suppression effect

Active Publication Date: 2021-09-21
鹰潭泰尔物联网研究中心有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some scholars also use artificial intelligence algorithms to solve problems, such as genetic algorithm, artificial fish swarm algorithm, and particle swarm algorithm. The time complexity of the optimization algorithm is too high to be suitable for practical scenarios

Method used

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  • A Pilot Assignment Method for Large-Scale Antenna System
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  • A Pilot Assignment Method for Large-Scale Antenna System

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Embodiment Construction

[0023] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0024] The multi-cell multi-user massive MIMO system is set to have L cells, and the base station of each cell is located in the center of the cell and equipped with M antennas. Each cell contains K single-antenna users, which are evenly distributed in the entire cell. The system adopts the TDD mode with uplink and downlink reciprocity. The channel gain from the kth user in the jth cell to the mth antenna in the ith cell base station is:

[0025]

[0026] g i...

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Abstract

The invention discloses a pilot frequency allocation method of a large-scale antenna system, which includes: constructing a hypergraph; initialization: selecting two users of different cells with the largest positive weight edge in the hypergraph, and combining two orthogonal Pilots are assigned to two users; users who have assigned pilots form an assigned user set; unassigned users are assigned pilots, including: determining the highest priority unassigned user according to the hypergraph; determining the highest priority unassigned user The user's available pilot set; according to the hypergraph calculation, when the unassigned user with the highest priority uses the pilot in the available pilot set, the sum of the interference intensity it brings to the allocated users using the same pilot; will bring the minimum The pilot frequency of the interference intensity sum is allocated to the unassigned user with the highest priority; the allocated user set is updated; it is judged whether all users have been allocated a pilot frequency; if not, the steps are repeated: the unallocated user is allocated a pilot frequency. The present invention improves the uplink and speed of the system.

Description

technical field [0001] The present invention relates to the communication field, in particular to a pilot allocation method for a large-scale antenna system. Background technique [0002] With the development of mobile communication networks, the number of mobile users and mobile devices has increased rapidly, and the demand for mobile data traffic has shown explosive growth. It is expected that the demand for mobile traffic by various new services in the next ten years will increase by thousands of orders of magnitude compared with the current demand, and new technologies with higher capacity will be required compared with existing network deployments. However, the expected traffic growth in the future far exceeds the current mobile network carrying capacity, thus requiring the introduction of new communication technologies. Among them, a Massive Multiple-Input Multiple-Output (Multiple-Input Multiple-Output, MIMO) technology has attracted much attention. In a massive MIM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04B7/0413
CPCH04B7/0413H04L5/0048
Inventor 朱禹涛胡志明洪军华刘泽民连永进
Owner 鹰潭泰尔物联网研究中心有限公司
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