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Pilot frequency distribution method and pilot frequency distribution device of multi-antenna system

A multi-antenna system and pilot allocation technology, applied in the field of multi-antenna systems, can solve problems such as pilot pollution system performance

Active Publication Date: 2014-11-19
BEIJING ZHIGU RUI TUO TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the number of antennas tends to be infinite, pilot pollution becomes the bottleneck of system performance (downlink transmission performance)

Method used

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  • Pilot frequency distribution method and pilot frequency distribution device of multi-antenna system
  • Pilot frequency distribution method and pilot frequency distribution device of multi-antenna system
  • Pilot frequency distribution method and pilot frequency distribution device of multi-antenna system

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Embodiment Construction

[0042] The specific implementation of the present application will be described in further detail below with reference to the accompanying drawings (the same numerals in several drawings represent the same elements) and the embodiments. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application.

[0043] Those skilled in the art can understand that terms such as "first" and "second" in this application are only used to distinguish different steps, devices or modules, etc., and do not represent any specific technical meaning, nor do they necessarily mean logical order.

[0044] Various embodiments of the present application provide a new channel estimation scheme for a multi-antenna system. The multi-antenna system refers to an OFDM system with an infinite or large number of antennas. The system has L cells, and each cell consists of an OFDM system with M The base station of the root antenna is comp...

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Abstract

An embodiment of the invention provides a pilot frequency distribution method and a pilot frequency distribution device of a multi-antenna system. The pilot frequency distribution method comprises the following steps of: determining the number of pilot frequencies to be distributed and the number of training periods according to the number of users of each cell; and determining a pilot frequency distribution scheme of each cell according to the number of pilot frequencies and the number of training periods, wherein determining the pilot frequency distribution scheme of each cell comprises the following steps of: determining the pilot frequency for each training period, which is distributed by each user of lth cell, and distributing the pilot frequency of at least kth user of the lth cell to different users of other cells in the system in each training period. According to the pilot frequency distribution method and the pilot frequency distribution device, which are provided by the embodiment of the invention, the pilot frequencies distributed to the expected users are distributed to different users in each training period, so that the pilot pollution in different continuous training periods is randomized for providing a foundation for carrying out later accurate channel estimation.

Description

technical field [0001] The present application relates to the technical field of multi-antenna systems, and in particular, to a pilot frequency allocation method and a pilot frequency allocation device for a multi-antenna system. Background technique [0002] In recent years, multi-antenna systems have moved from the theoretical research stage to large-scale applications in modern wireless cellular systems. In today's wireless communication field, inter-cell interference has long been a bottleneck, both in practical systems and in theoretical research, which severely limits the channel capacity and throughput of the communication system. In order to reduce inter-cell interference, current research hotspots are Multi-User Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) interference alignment technology and cooperative networks. These techniques have been shown to be effective in reducing inter-cell interference. However, in the face of exponentially in...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04B7/04
CPCH04L5/0023H04L5/0037H04L5/0073H04L5/0048H04L25/0204
Inventor 陈致霖杨晨阳黄伟才
Owner BEIJING ZHIGU RUI TUO TECH
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