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A method and system for base station pilot-assisted channel estimation in a large-scale mimo system

An auxiliary channel, large-scale technology, applied in channel estimation, transmission system, baseband system, etc., can solve the problems of pilot resource consumption and low channel estimation accuracy, achieve high channel estimation accuracy, improve spectrum utilization efficiency and data transmission. effect of speed

Active Publication Date: 2022-05-17
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the defects and improvement needs of the prior art, the present invention provides a pilot-assisted channel estimation method and system at the base station in a massive MIMO system. low technical issues

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  • A method and system for base station pilot-assisted channel estimation in a large-scale mimo system
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  • A method and system for base station pilot-assisted channel estimation in a large-scale mimo system

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Embodiment Construction

[0034]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 accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0035] Such as figure 1 As shown, a base station pilot-assisted channel estimation method in a massive MIMO system provided by the present invention specifically includes the following steps:

[0036] (1) Obtain channel state information matrix

[0037] ((1-1) The mobile terminal sends the OFDM pilot signal s to the base station t =[s t (1), s t (2),...,s t (m)] T , one OFDM pilot symbol c...

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Abstract

The invention discloses a base station pilot-aided channel estimation method and system in a massive MIMO system, belonging to the field of massive MIMO wireless communication. According to the strong autocorrelation characteristic of channel data in the frequency domain, the present invention proposes a base station pilot-assisted channel estimation method in a massive MIMO system, and recovers CSI at all frequency points according to CSI at some known frequency points. The method adopted is a method in the field of image processing to reconstruct a high-resolution image using a low-resolution image. The CSI is regarded as a pixel in the image, and the CSI of all frequency points at each moment is a picture. Image, use the CSI at some of the known frequency points to input the convolutional residual network model to reconstruct the CSI at all frequency points. This method only needs to use a small number of pilot signals in the frequency domain, and can restore the CSI at all frequency points through interpolation, and can ensure high channel estimation accuracy, effectively improving the system's spectrum utilization efficiency and data Transmission rate.

Description

technical field [0001] The present invention belongs to the field of large-scale multiple-input multiple-output (MIMO) wireless communication, and more particularly relates to a base station-side pilot-assisted channel estimation method and system in a large-scale MIMO system. Background technique [0002] As a key technology in 5G, massive MIMO technology has been extensively studied in recent years. Massive MIMO technology places more antennas on the base station (base station, BS), usually hundreds or thousands, and serves multiple users at the same time, thereby obtaining greater space diversity gain and further improving the data transmission rate. and link reliability. In order to give full play to the advantages of a massive MIMO system, accurate channel state information (channel state information, CSI) acquisition is essential, and the CSI is generally estimated through a pilot estimation method. However, in massive MIMO systems, due to the increase in the number ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04B7/0413
CPCH04L25/0204H04L25/0228H04L25/0242H04L25/0254H04B7/0413Y02D30/70
Inventor 彭薇徐康谢一梅江涛
Owner HUAZHONG UNIV OF SCI & TECH