Time-varying channel tracking method for unmanned aerial vehicle system under beam squinting effect

Abstract

The invention discloses a time-varying channel tracking method for an unmanned aerial vehicle system under a beam squinting effect. The method comprises the following steps of: 1, modeling a channel of the unmanned aerial vehicle system under a Doppler frequency shift effect and the beam squinting effect; 2, obtaining a discrete time-frequency multiple-input-multiple-output time accumulation channel model according to the continuous time-frequency multiple-input-multiple-output instantaneous channel model of the unmanned aerial vehicle; and 3, converting a high-dimensional channel tracking problem into estimation of channel physical parameters by utilizing the channel sparsity characteristic of the broadband unmanned aerial vehicle multiple-input-multiple-output system. The method providedby the invention has simple steps, high-latitude channel tracking is converted into estimation of channel gain and Doppler frequency shift of channel physical parameters and arrival wave angles of base station side signals, then the channel physical parameters are estimated through a lattice-point-free compressed sensing algorithm, complete channel information is constructed, and therefore the channel tracking process is effectively simplified.

Description

technical field [0001] The invention belongs to the technical field of large-scale antenna array unmanned aerial vehicle communication, and in particular relates to a time-varying channel tracking method for an unmanned aerial vehicle system under the beam tilt effect. Background technique [0002] With the advent of the information age, UAV technology is developing rapidly. Due to the advantages of high mobility and flexible deployment of UAVs, UAVs have not only attracted great attention from all walks of life, but also have been widely used in cargo transportation, border surveillance, search and rescue missions, and disaster relief. But various drone applications impose exceptionally stringent communication requirements in terms of available data rates, connection reliability, latency, and more. In order to meet the strict communication requirements of UAV applications, UAV communication technology with large-scale array antennas in the millimeter wave band (30GHz-300GH...

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Problems solved by technology

But various UAV applications present exceptionally stringent communication requirements in terms of available data rates, connection reliability, latency, etc.

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