Secret transmission of intelligence
    20.
    发明授权
    Secret transmission of intelligence 失效
    秘密传播情报

    公开(公告)号:US3897591A

    公开(公告)日:1975-07-29

    申请号:US45632242

    申请日:1942-08-27

    CPC classification number: H04K1/02

    Abstract: 1. In a signal privacy system, means to convert a gradually varying signal current wave into a stepped wave, means to superpose on said stepped wave a masking current varying in magnitude in a manner unrelated to the signal to produce a stepped summation current wave for transmission, and means to eliminate short portions of the summation wave at the points where the steps occur to further conceal the signal.

    Abstract translation: 在信号隐私系统中,用于将逐渐变化的信号电流波转换成阶梯波的装置意味着在所述阶梯波上叠加屏蔽电流,该屏蔽电流以与信号无关的方式在幅度上变化以产生阶梯式求和电流波, 传输,以及在步骤发生的点处消除求和波的短部分以进一步隐藏信号的装置。

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