Modeling method for non-stationary characteristics of large-scale antenna array

Abstract

An embodiment of the invention provides a modeling method and device for non-stationary characteristics of a large-scale antenna array and computing equipment; the method is easy to implement, is simple in state transition, can well reflect the dynamic characteristics of a scatterer cluster and is closer to a channel measurement result. Themodeling method comprises the steps: obtaining the dimension information and array element spacing information of a planar antenna, and obtaining the non-stationary characteristics of the planar antenna array; obtaining a first updating rate of the observable scatterer cluster and a second updating rate of the unobservable scatterer cluster; obtaining an observable scatterer cluster set and an unobservable scatterer cluster set of the antenna array elements of the first row and the first column of the planar antenna; calculating the exchange probability of the observable scatterer cluster and the unobservable scatterer cluster according to the arrayelement spacing information and the first updating rate; calculating the replacement probability of the unobservable scatterer cluster according to the array element spacing information and the secondupdating rate; and calculating an observable scatterer cluster set and an unobservable scatterer cluster set of the antenna array elements in any row and any column in the dimension.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a modeling method, device and computing equipment for the non-stationary characteristics of a large-scale antenna array. Background technique [0002] In a large-scale antenna array, the number of antenna elements equipped at the transceiver end is large, resulting in an increase in the Rayleigh distance, and the transmission environments experienced by different antenna elements at the transceiver end are different. Non-stationary characteristics, that is, spatial non-stationary characteristics of large-scale antenna arrays. The main manifestations are: the radio waves emitted by different antenna elements at the transmitting end reach the receiving end through different scatterer clusters, such as figure 1 as shown, Arriving via scatterer cluster 1 and scatterer cluster 3 Arriving via scatterer cluster 2 and scatterer cluster 3 in Indicates the i-th antenna elem...

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Problems solved by technology

Therefore, the final realization of the birth-death process will be affected by occasional extreme situations, which will lead to extreme channel models, making the difference in the scatterer clusters experienced by different antenna elements is too large, as shown in the final simulation results of literature [1]. There are 9 different scatterers clusters between 1 and antenna 32, so that the spatial cross-correlation between antenna elements tends to zero after several wavelengths, which does not correspond well to the channel measurement results

[0009] On the other hand, this method has a high degree of fit with linear arrays and cannot model two-dimensional planar antennas well, such as figure 2 shown

According to the technology of the birth and death process described in the literature [1], the evolution of the x-axis and the y-axis cannot be considered

In literature [2], although the birth-death process in literature [1] is extended to planar antennas by using the method of random center and generating radius according to the birth-death process, it is still based on the assumption that the scatterer cluster will not reappear after disappearing, so it is different from Literature [1] has a similar defect

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