星地WiFi关键技术研究综述

Overview of research on satellite-to-ground WiFi key technologies

低地球轨道(Low Earth Orbit,LEO)卫星到地面之间的无线保真(Wireless Fidelity,WiFi)通信系统当前已经获得了广泛关注,针对LEO卫星信道的高误码、长时延等特点,文章总结并提出了采用帧的分片与聚合、选择重传与块确认、插入导频等方法对802.11g进行改进,这些方法的研究总结对LEO星地WiFi的实现具有重要意义。

WiFi communication system between satellite and ground has gained wide attention. Aiming at high error of LEO satellite channel,long delays and other characteristics,elective repeat ARQ protocol,fragmentation and aggregation of frame,inserting a pilot and other methods are introduced in this paper to improve the 802. 11. The summarization of study methods has important significance to the achievement of WiFi network based on LEO satellite-to-ground.