Durofy » signal operations http://www.durofy.com Engineering & Technology Tutorials Sat, 05 May 2012 02:06:00 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Signal Operations - Time Shifting, Scaling & Inversion http://www.durofy.com/mathematics/signal-operations/ http://www.durofy.com/mathematics/signal-operations/#comments Thu, 13 Aug 2009 11:41:38 +0000 Rishabh Dev http://zarrata.com/durofy/?p=57 Signal Operations are simply modifications to the time variable of the signal to generate new signals. These are pretty similar to the mathematical graphical tranformations from our good old Calculus text.

The three kinds of Signal Operations are Time Shifting, Time Scaling & Time Inversion(or Time Reversal)

Time Shifting is simply shifting the signal in time. When we add a constant to the time, we obtain the advanced signal, & when we decrease the time, we get the delayed signal.

time_shifting

Time Scaling is compressing or dilating the signal.

time_scaling

Time Inversion is simply flipping the signal about the y-axis.

time_inversion

The above operations makes it easy to express a large domain of signals based on the fundamental signals by operation upon the basic signals.

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