Channel estimation method and system

A channel estimation and channel technology, which is applied in channel estimation, transmission systems, radio transmission systems, etc., can solve problems such as pilot pollution, achieve accurate channel estimation, and solve the problem of pilot pollution.

Active Publication Date: 2017-03-29
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Problems solved by technology

[0007] Based on this, it is necessary to provide a channel estimation

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[0033] The purpose of the present invention is to provide a channel estimation method, which is suitable for a cellular network in a massive MIMO system, and can effectively reduce pilot pollution in a massive MIMO system by implementing the channel estimation method provided by the present invention , thereby enabling the base station to estimate the channel more accurately, and further enabling the base station to more accurately recover the data sent by the user.

[0034] like figure 1 As shown, it is a partial schematic diagram of a cellular network. There are usually multiple cells in a cellular network, and each cell is provided with a base station. exist figure 1 Only three schematic diagrams of cells in a cellular network are shown in the figure, which are cell 10, cell 20 and cell 30, wherein each cell is divided into a central user area 120 and an edge user area 110, and from the cell 10 In terms of interference, the edge user areas of cell 20 and cell 30 are stro...

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Abstract

The invention relates to a channel estimation method and a channel estimation system, applied to a large-scale MIMO system comprising base stations and a plurality of cells. The method comprises the following steps: different pilot signals are distributed to central users and edge users; the target base station estimates a channel between the target base station and the target cell according to received data; the target base station recovers the data sent by the central users of the target cell and caching the recovered data according to the estimated channel and signals received within a continuous time; the target base station eliminates the data sent by the central users of the target base station from the received data according to the cached data and the pilot signals of the central users; the target base station estimates the channels between the target base station and the edge users of the target cell, and channels between the target base station and peripheral interference cells, so that channel estimation is more accurate, and the pilot pollution problem is effectively solved.

Description

technical field [0001] The invention relates to the field of massive MIMO communication, in particular to a channel estimation method and system. Background technique [0002] The so-called massive MIMO is called Massive MIMO or Large-Scale MIMO. As the name implies, hundreds of antennas (128, 256 or more) are installed at the base station. Compared with traditional MIMO, the main difference of Massive MIMO is that when the number of antennas of the base station gradually increases to infinity, the thermal noise and inter-cell interference that usually seriously affect the performance of the communication system will be negligible, and the simplest Beamforming, such as the maximum ratio combining receiver (MRC receiver) will become optimal. Compared with LTE, which also occupies 20MHz bandwidth, the cell throughput rate of Massive MIMO can reach 1200 Mbit / s, and the spectrum utilization rate has reached an unprecedented 60 bits / s / Hz / cell. [0003] As a novel cellular netw...

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Application Information

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IPC IPC(8): H04L25/02H04B7/0413
CPCH04B7/0413H04L25/0204
Inventor 王海王锐王伟陈万里朱晓丹李风从齐显东
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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