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    • 90. 发明授权
    • Spectral and temporal stealthy fiber optic communication using sampling and phase encoding detection systems
    • 使用采样和相位编码检测系统的光谱和时间隐形光纤通信
    • US09288045B2
    • 2016-03-15
    • US14232655
    • 2012-07-17
    • Dan SadotZeev ZalevskyTomer Yeminy
    • Dan SadotZeev ZalevskyTomer Yeminy
    • H04L9/08H04B10/85H04K1/04H04K1/00
    • H04L9/0852H04B10/85H04K1/006H04K1/04
    • A method for providing spectral and temporal stealthy information transmitted over an optical communication channel, according to which, at the transmitting side, the power spectral density of a pulse sequence bearing the information is reduced by encrypting the temporal phase of the pulse sequence. The power of the pulse sequence is spread in the frequency domain, to be below the noise level, by sampling the pulse sequence. Spectral phase encoding is used to temporally spread the pulse sequence and to prevent coherent addition of its spectral replicas in frequency domain. The resulting signal, encrypted both in time and frequency domains, is then transmitted. Spectral phase decoding is performed at the receiving side by performing coherent detection and folding all the spectral replicas of the transmitted signal to the baseband by means of sampling. The temporal phase of the signal is decrypted and the information which is delivered by the pulse sequence is decoded.
    • 一种用于提供通过光通信信道发送的频谱和时间隐形信息的方法,根据该方法,在发送侧,通过加密脉冲序列的时间相位来减少携带信息的脉冲序列的功率谱密度。 通过采样脉冲序列,脉冲序列的功率在频域中扩展,低于噪声电平。 频谱相位编码用于时间扩展脉冲序列,并防止其频域中的频谱复制的相干相加。 随后发送在时域和频域加密的结果信号。 通过执行相干检测并通过采样将发射信号的所有光谱复制品折叠到基带,在接收侧执行光谱相位解码。 信号的时间相位被解密,并且由脉冲序列传送的信息被解码。