Pilot allocation method based on positioning information

A technology for pilot frequency allocation and positioning information, applied in the field of communication, can solve problems such as large performance differences, restrict Massive MIMO system performance, and do not consider cell user performance, etc., and achieve the effect of improving pilot frequency allocation technology and improving the average performance of users

Active Publication Date: 2018-11-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0002] In 2010, Professor Marzetta of Bell Labs analyzed the performance of the multi-cell communication system when the number of base station antennas tends to infinity in the literature for the first time, and pointed out that the pilot pollution problem seriously restricts the system performance of Massive MIMO
However, in this paper, the pilot allocation criterion is to maximize the total rate of users in the target cell, without considering the performance of users in other cells in the massive MIMO system
In addition, this document uses a greedy algorithm when pursuing the maximization of the total rate of the target cell, so that the performance of different users in the target cell varies greatly, and the fairness of users in the target cell cannot be guaranteed.
The document "FairPilot Assignment Based on AOA and Pathloss with Location Information inMassive MIMO" aims at the fairness of target cell users in the above article, and proposes a new pilot assignment metric, which solves the problem to a certain extent; but There is still a lot of room for improvement in solving the fairness of all community users

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  • Pilot allocation method based on positioning information
  • Pilot allocation method based on positioning information
  • Pilot allocation method based on positioning information

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation manners and accompanying drawings. This implementation case is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and specific process are given, but the implementation scope of the present invention is not limited to the described scene.

[0044] The massive MIMO system adopted in this example has three hexagonal cells in total. There is a base station equipped with M antennas in the center of each cell, and each cell has 10 single-antenna users. The pilot group of the whole system is composed of 10 mutually orthogonal pilot sequences, and the length of each pilot sequence is 10. The pilots assigned by different users in the same cell are orthogonal to each other, and different cells use the same set of pilo...

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Abstract

The invention discloses a pilot allocation method based on positioning information, belongs to the technical field of communication, and in particular relates to a pilot allocation method based on positioning information. The pilot allocation method is based on user location information and base station location information, and has better user average performance (average normalized mean square error of a channel) of an entire massive MIMO system than a method in the prior art. In addition, the pilot allocation technology is also greatly improved in terms of fairness among users of the entirecommunication system.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a pilot allocation method based on positioning information. Background technique [0002] In 2010, Professor Marzetta of Bell Labs analyzed the performance of multi-cell communication systems when the number of base station antennas tends to infinity in the literature for the first time, and pointed out that the pilot pollution problem seriously restricts the system performance of Massive MIMO. In recent years, the impact of pilot pollution effects on the performance of Massive MIMO systems in different scenarios and how to solve or alleviate the problem of pilot pollution has gradually become a research hotspot in current wireless communications. [0003] As far as how to solve the problem of pilot pollution in TDD Massive MIMO systems, the current research results can be roughly divided into two categories: one is the estimation method based on pilot, includin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04B7/0413
CPCH04B7/0413H04L5/0048
Inventor 陈一丰杨海芬周军周亮林水生阎波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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