Method and apparatus for ensemble averaging repetitive signals
    10.
    发明授权
    Method and apparatus for ensemble averaging repetitive signals 失效
    用于确定平均重复信号的方法和装置

    公开(公告)号:US3622765A

    公开(公告)日:1971-11-23

    申请号:US3622765D

    申请日:1969-06-27

    CPC classification number: G06F17/18 G01R33/46

    Abstract: A spectrometer or similar device is scanned repetitively to produce a series of repetitive output signals either of analog or digital form. Each output signal includes an ensemble of timedisplaced components and is identical to the other output signals except for noise. The series of output signals is ensemble averaged (time averaged) by an ensambled-averaging digital computer which scans each output signal of the series and samples each output signal at a plurality of sampling points at the same relative position in each output ensemble. Digital data for each sampling point is accumulated in a separate channel of the memory to improve the signal-to-noise ratio. An extra bit is added into the sampled data for each sampling point, such added bit being less than the least significant bit to be stored in the memory. The accumulation of added bits of each sampling point, over a series of scans, adds to zero to some number which is the same for each sampling point, whereby the digitization error is reduced.

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