Construction of any switching waveform (a) Square signal sq(t) and Square wave signals encrypted at the sending end and recovered at the A modulating signal is a square wave as shown in the figure The c Visualizing Fourier Transform for Square Wave Signal YouTube ac Converting a square wave into a sine wave Electrical Engineering. Designer Afifa Sayeed presents Square Waves, a visually striking, unisex pullover boasting bold concentric squares softly knit and nestled in silky Crane. This uniquely constructed pullover is knit from the center out starting with the creation of two striped squares, one for the front and one for the back. The pattern continues to build upon the geometric design along the shoulders and sleeves; and is completed with a simple 1x1 rib detail at the bottom edge, mock neck and cuffs.