利用电力系统三相交流电压过零点和高速数字频率合成器解决了跳频系统中同步和快速频率合成的两个关键问题。
The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.
现代跳频系统需要传输大量数据信息，传统调制方式由于频谱利用率低而不适合跳频系统的高速数据传输。
Modern FH communication system need transmit a mass of data, traditional modulations are no longer suitable for high-speed data transmitting in FH system due to low spectrum efficiency.
因而，研究适合于高速数据传输的跳频通信特点且具有高效频谱利用率的调制技术具有重要的实际意义。
Therefore, it has a practical significance to develop some fit methods of modulation with high spectrum efficiency for shortwave FH communication system.
因而，研究适合于高速数据传输的跳频通信特点且具有高效频谱利用率的调制技术具有重要的实际意义。
Therefore, it has a practical significance to develop some fit methods of modulation with high spectrum efficiency for shortwave FH communication system.
应用推荐