关键词:短波,信道传播特性,信道测量,频域信道估计 Abstract Abstract Communication system is composed of information source, sink and channel. Information source is birthplace of signals. Information sink is the destination of signals. The channel is between the source and the sink. When we are research the communication system, we do see the source and sink. As the channel, if the channel is fibers or cables, we can see it with our eyes, but how about the wireless channels? We even can not feel it. Thus, this article is mainly focus on the wireless channel research. In our project, the next task is going to figure out a communication system on shortwave. So the article could be a preparation for our next task. In order to ensure the communication quality in shortwave environment we have to get familiar to the characteristic of the shortwave channel. For this purpose, we first re