关键词: 直升机卫星通信, 旋翼遮挡, 卡尔曼滤波, 预测算法

Abstract:

Wideband satellite communication is one of the key components in the 6G space-ground integrated network, which provides high data rate channels for Helicopter broadband communications. However, in the process of helicopter satellite communication, the communication interruption caused by rotor occlusion seriously affects the system performance. In this paper, aiming at the complex rotor occlusion environment of the coaxial twin rotor helicopter, an algorithm based on the Kalman filter is proposed for predicting the duration of the helicopter satellite communication rotor blade gap. Based on the basic principle of the Kalman filter, this algorithm can predict the blade slot during burst transmission of the return link, and ensure effective signal transmission of the helicopter's airborne terminal under limited conditions. Simulation results show that the prediction algorithm presented in this paper is superior to the traditional algorithm in terms of prediction accuracy, and that it can also rapidly converge when the rotor speed changes, so as to realize accurate tracking and prediction for the change of the blade slot of the rotor blockage.

Key words: helicopter satellite communication, blade blockage, Kalman filter, prediction algorithm