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本文研究了在短波数据传输中的频率自适应问题。提出了一种具有自动建立通信线路和自动选频功能的ARQ自适应系统,即FH—ARQ自适应系统。该系统具有较强的抗干扰能力,尤其是对有意、无意的电台干扰具有自动躲避能力。采用该系统后,可使系统的输出误字率由10~(-2)降至10~(-5)。该技术对改进国内现有短波通信系统的性能具有重要价值。
This paper studies the frequency adaptive problem in shortwave data transmission. An ARQ adaptive system with automatic communication line establishment and automatic frequency selection is proposed, namely FH-ARQ adaptive system. The system has a strong anti-interference ability, especially for intentional, unintentional radio interference with automatic avoidance ability. With this system, the output error rate of the system can be reduced from 10 ~ (-2) to 10 ~ (-5). This technology is of great value to improving the performance of the existing domestic shortwave communications system.