无人机视距数据链的信道特性与扩频技术

Research on Channel Characteristics and Spectrum Spread Technique in UAV LOS Datalink

无人机视距数据链的信道类型主要是一个干涉型平衰落信道,但也可能发生频率选择性衰落、时间选择性衰落。限于无人机的使用特点和条件,视距数据链不同于一般通信系统,不适于极高的通信可靠度,也不要求很大的衰落储备。分析了扩频系统在无人机视距数据链中的特殊性并给出了解决方法。

The channel of UAV LOS datalink is mainly an interferometric flat fading channel, in which frequency selective fading and time selective fading can occur. Limited by UAV operation features and conditions, LOS datalink which is different from common communication system can not provide very high reliability and does not require so much fading margin. The paper analyzes the particularity of spectrum spread system in UAV LOS datalink and presents the solution.