ArrayPeakSearch
Full Library / Math Operator / Array / ArrayPeakSearch
Block Name: ArrayPeakSearch
Code File Location: VisualSim/actor/lib/ArrayPeakSearch
o This actor outputs the indices and values of peaks in an input array. The dip and squelch parameters control the sensitivity to noise. These are given either as absolute numbers or as relative numbers. If they are absolute numbers, then a peak is detected if a rise above dip is detected before the peak and a dip below dip is detected after the peak. If they are given as relative numbers, then a peak is detected when a rise by a factor dip above the most recently seen minimum (if there has been one) is seen before the peak, and if a dip by a factor dip relative to the peak is seen after the peak. Relative numbers can be either linear (a fraction) or in decibels. This is determined by the value of the scale parameter. For example, if dip is given as 2.0 and scale has value "relative linear", then a dip must drop to half of a local peak value to be considered a dip. If squelch is given as 10.0 and scale has value "relative linear", then any peaks that lie below 1/10 of the global peak are ignored.
Note that dip is relative to the most recently seen peak or valley, and squelch is relative to the global peak in the array, when relative values are used. If scale has value "relative amplitude decibels", then a value of 6.0 is equivalent to the linear value 2.0. If scale has value "relative power decibels", then a value of 3.0 is equivalent to the linear value 2.0. In either decibel scale, 0.0 is equivalent to 0.0 linear. Other parameters control how the search is conducted.
Created with the Personal Edition of HelpNDoc: Free HTML Help documentation generator