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The digital voice terminal for slow-FH radio application

机译:慢速FH无线电应用的数字语音终端

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The authors present a real-time digital voice terminal (DVT) fornslow frequency-hopping (slow-FH) radio applications to ensure a reliablenradio link. Slow-FH technologies have been introduced for ECCMncommunications as a near-term solution which will not disturb the usagenof the present conventional radio spectrum. Digital secure algorithmsnwith digital speech codec are known to achieve a high degree ofnsecurity. The DVT is composed of a speech codec and a voice-band modem.nThe speech codec that is used for the DVT is a 4.8 kbit/s pitchnpredictive coder using adaptive transform coding (PP-ATC). The modem isna QAM voice-band modem. This modem has a specific signal format to allownwaveform shaping by a hopping transmitter to keep RF compatibility withnconventional radio. The authors address aspects of the DVT architecture,nthe implementation of algorithms in the signal processors, and thensystem performance
机译:作者提出了一种用于慢跳频(slow-FH)无线电应用的实时数字语音终端(DVT),以确保可靠的无线电链路。慢速跳频技术已经作为ECCMn通信的一种近期解决方案被引入,它不会干扰当前常规无线电频谱的使用。已知具有数字语音编解码器的数字安全算法可实现高度的安全性。 DVT由语音编解码器和语音频带调制解调器组成。用于DVT的语音编解码器是使用自适应变换编码(PP-ATC)的4.8 kbit / s基调预测编码器。调制解调器isna QAM语音频带调制解调器。该调制解调器具有特定的信号格式,以允许跳频发射机进行波形整形,以保持与常规无线电设备的RF兼容性。作者介绍了DVT体系结构的各个方面,信号处理器中算法的实现以及系统性能。

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