Modulation Recognition of Communication Signals is an important part in electronic counter measures; it also is a rapidly evolving area of signal analysis.

信号的调制方式识别对于电子对抗和频谱监测都具有极其重要的意义。

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Jurors at the federal courthouse watched a closed-circuit TV signal of the testimony, with extraordinary security measures in place to prevent electronic interceptions.

CNN: No decision on Clinton videotapes