短波通信在海上无线电通信中有着极为重要的地位。由于它设备简单、造价低廉、能耗小,因而在近廿多年发展起来的海洋数据遥控遥测浮标系统中,获得了广泛的应用,已成为海洋数据远距离传输的一种基本手段。短波信息传输是利用电离层对电波的反射来实现的。而电离层是一时变色散信道,其参数有明显的日变化和季节变化,而且还与太阳活动周期密切相关。为适应电离层信道参数的变化,要求通信电路的工作频率经常更换,否则通信质量将急剧下降,有时甚至使通信不能进行。这给长期处于无人管理而又要求高传输精度的数据浮标遥测系统,显然地造成了严重 Shortwave communications have a very important place in maritime radio communications. Because of its simple equipment, low cost and low energy consumption, it has been widely used in the oceanic data telemetry buoy system developed in recent 20 years and has become a basic means for long-distance transmission of oceanographic data. Shortwave information transmission is the use of ionospheric reflection of radio waves to achieve. The ionosphere is a time-varying chromatic dispersion channel, its parameters have obvious diurnal variation and seasonal variation, but also closely related with solar activity cycle. In order to adapt to the change of the ionospheric channel parameters, the operating frequency of the communication circuit is required to be changed frequently, otherwise the communication quality will drop drastically, and sometimes the communication may not be performed. This has apparently resulted in a data buoy telemetry system that has been left unmanaged for a long time and requires high transmission accuracy