A Measured-Based Statistical Channel Modeling Method for 3d MIMO

Abstract

The invention belongs to the technical field of wireless communications, and discloses a 3D MIMO (Three-dimensional Multiple Input Multiple Output) statistical channel modeling method based on actual measurement, which effectively and accurately reflects the real three-dimensional channel environment and improves the accuracy of a channel model. Statistical characteristics of large scale parameters are extracted through external field measurement, and a cross correlation matrix of large scale parameters is generated to solve the non-positive problem of the matrix in the existing model; a linear model is used to make a statistics of elevation spread of the modeled 3D MIMO channel, which increases the dependence of vertical domain angle spread and distance; a sub-diameter azimuth and a sub-diameter elevation dependent on each other are randomly generated through the mixed Von Mises Fisher distribution; and according to the statistical analysis of the external field measurement, each characterization parameter of the channel model is determined, and a 3D MIMO channel coefficient is generated. The 3D MIMO statistical channel modeling method based on the actual measurement provided by the invention expands the application of the 3D MIMO channel model, and provides a powerful tool for accurately and efficiently evaluating a related algorithm of a 3D MIMO system.

Description

Technical field [0001] The present invention belongs to the field of wireless communication technology, and in particular relates to a 3D MIMO statistical channel modeling method based on actual measurement. Background technique [0002] Wireless channel is the basis of research on new generation wireless communication system design and new communication technology algorithm, so accurate channel modeling is very important. At present, most statistical channel models based on geometric architecture are two-dimensional, which meets the requirements of traditional urban macro cell wireless channel modeling. With the continuous refinement of channel modeling scenarios, two-dimensional channel models cannot accurately describe wireless channels in various actual scenarios. Therefore, in order to describe channel characteristics more objectively and accurately, a three-dimensional multiple-input multiple-output (3D MIMO) channel model is proposed. Existing standardized channel models...

AI Technical Summary

Problems solved by technology

[0004] In summary, the problems existing in the existing technology are: the cross-correlation matrix of the large-scale parameters in the existing model is not positive definite, and most channel models do not have the distance dependence on the pitch departure angle extended ESD and the pitch arrival angle extended ESA The characteristics are described and the existing 3D MIMO channel model separates the generation process of the azimuth angle and the elevation angle into consideration without studying the cross-correlation between the azimuth angle and the elevation angle

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