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    • 29. 发明申请
    • OPTICAL CORRELATION APPARATUS
    • 光学相关设备
    • WO2008075021A1
    • 2008-06-26
    • PCT/GB2007/004850
    • 2007-12-17
    • QINETIQ LIMITEDLEWIN, Andrew, CharlesORCHARD, David, ArthurCOOPER, Martin, James
    • LEWIN, Andrew, CharlesORCHARD, David, ArthurCOOPER, Martin, James
    • G06K9/74H04Q11/00
    • G06K9/74G06E3/00H04Q11/0005H04Q2011/003H04Q2011/0032H04Q2011/0035
    • An optical correlation apparatus is described which forms first and second parallel optical signals in response to a serial input data stream (301). The first parallel optical signal is arranged to have bright pulses represent binary 1 and the second parallel optical signal is arranged to have bright pulses represent binary 0. A channel select means (310a, 310b), such as an optical switch or amplitude modulator, deselects or blocks channels in the first parallel optical signal which correspond to binary 1 in a reference data string and also deselects or blocks channels in the second parallel optical signal which correspond to binary 0 in the reference data string. The remaining optical signals are combined at one or more detectors (312). Where the input data matches the reference data string each bright pulse in the first and second parallel optical signals is deselected and the detector registers zero intensity. However when there is any mismatch at least one channel will pass a bright pulse to the detector. An instance of zero intensity can therefore be used as an indication of pattern match.
    • 描述了一种响应于串行输入数据流(301)形成第一和第二并行光信号的光学相关装置。 第一并行光信号被布置为具有表示二进制1的亮脉冲,并且第二并行光信号被布置为具有表示二进制0的亮脉冲。诸如光开关或振幅调制器的通道选择装置(310a,310b)取消选择 或者在对应于参考数据串中的二进制1的第一并行光信号中阻塞通道,并且还取消选择或阻止在参考数据串中对应于二进制0的第二并行光信号中的通道。 剩余的光信号在一个或多个检测器(312)处组合。 在输入数据与参考数据串匹配的情况下,取消选择第一和第二并行光信号中的每个亮脉冲,并且检测器记录零强度。 然而,当存在任何失配时,至少一个通道将通过明亮的脉冲到检测器。 因此,零强度的实例可以用作模式匹配的指示。