Partitioned mixed channel modeling method based on cluster delay line in high-speed railway viaduct scene

Abstract

The invention relates to a partitioned mixed channel modeling method based on a cluster delay line in a high-speed railway viaduct scene. The method comprises the steps of multipath component extraction and clustering of measured channel impulse responses; data partitioning according to changes of the number of clusters; calculation of the relative delay time of cyclically moving reflective paths in a cluster form relative to direct reflective paths in a cluster form, and separation of theoretical model data and statistical model data; analysis of the statistical model data; analysis of the theoretical model data; establishment of a partitioned mixed channel model based on the cluster delay line in the high-speed railway viaduct scene. By adopting the method, the overall characteristics of wideband channel changes can be reflected via inter-cluster characteristics, and details of wideband channel changes can be reflected via inner-cluster characteristics, regular effects on channel multipath characteristics resulting from regular buildings on two sides of tracks can be reflected, and irregular effects on channel multipath characteristics resulting from rapid scenery changes around trains can also be reflected.

Description

Technical field: [0001] The present invention relates to the technical field of wireless mobile communication, and in particular to a method for modeling partitioned mixed channels based on cluster delay lines in the high-speed rail viaduct scene. Background technique: [0002] The development of high-speed railway requires the corresponding development of the train-ground broadband wireless communication system. On the one hand, to provide communication services for passengers, in addition to basic voice services, the demand for broadband data services is on the rise; on the other hand, in order to ensure the safe operation of trains, a large amount of real-time status information of key train components needs to be transmitted to the ground monitoring center in a timely manner. Therefore, it is imperative to construct a broadband wireless access system suitable for the high-speed rail environment. The wireless channel model of high-speed rail is the basis of communication...

AI Technical Summary

Problems solved by technology

Traditionally, the multipath channel model is extracted from the real measurement data, which is generally modeled as a statistical model, such as the WINNERⅡ model and the IMT-A model. The shortcoming of this modeling method is to ignore the regular changes in channel propagation.

On the other hand, in the existing references, regarding the theoretical channel model in the high-speed rail scenario, there is a lack of verification with actual measured data

Images