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在短波通信中,采用频率自适应与数据速率自适应是提高通信质量和容量的有效方法之一。本文根据短波信道特点,提出了一种采用 ARQ 纠错、包含信道估值、数据速率可变的新的短波通信系统结构,并对该系统的工作过程、信道估值原理、同步性能等进行了简要的论证和分析。部分电路及软件在实验室进行了验证。结果表明,该系统在短波常用的 WTK 系统中,误码率约改善2～3个数量级,并可用于改良现有的一些短波通信装备。
In shortwave communication, the use of frequency adaptation and data rate adaptation is one of the effective ways to improve communication quality and capacity. In this paper, we propose a new shortwave communication system with ARQ error correction, including channel estimation and variable data rate according to the characteristics of HF channel. The working process, channel estimation principle and synchronization performance of the system are also studied Brief demonstration and analysis. Some circuits and software were verified in the laboratory. The results show that the system can improve the error rate by 2-3 orders of magnitude in shortwave WTK systems and can be used to improve existing shortwave communication equipment.