本文阐述了MIMO系统的分类、工作原理及运作方式。针对微小型无人机与地面站系统无线数据通信中的局限性,结合本微小型无人机无线通信的特点,设计出一种基于MIMO技术的无线数据通信系统模型。实际飞行表明,该系统与传统单输入单输出通信系统相比,覆盖范围更广,传输效率更高。 This article describes the classification of MIMO systems, working principle and mode of operation. Aiming at the limitation of wireless data communication between the UAV and ground station system, combined with the characteristics of the UAV wireless communication, a wireless data communication system model based on MIMO technology is designed. The actual flight shows that the system has wider coverage and higher transmission efficiency than the traditional single-input single-output communication system.