... 数字语音编码 digital speech code 数字语音插空 digital speech interpolation (DSI) 衰落 fading 衰落包络 fading envelope ...
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Envelope fading of reflecting signals on HF ionospheric channels is Rayleigh fading.
高频电离层信道反射信号的幅度衰落服从瑞利分布。
Envelope fading distributions statistics produced by this device show close agreement with theoretical statistics and documented experimental data.
对设备的测试结果表明：模拟的衰落信号的包络统计与理论统计特性和实验观察基本一致。
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