when the signals are symmetric then this signals are gaussian

In statistics, the Gaussian curve, also known as the Normal curve, is symmetrical.

The Gaussian curve is the Normal distributoin curve, the commonest (and most studied) of statistical distributions.

It could be a Gaussian curve (Normal distribution) rotated through a right angle.

It could be a Gaussian curve (Normal distribution) rotated through a right angle.

It could be a Gaussian curve (Normal distribution) rotated through a right angle.

It could be a Gaussian curve (Normal distribution) rotated through a right angle.

Gaussian curve

The bell curve graph is another name for a normal (Gaussian) distribution graph. A Gaussian function is a certain kind of function whose graph results in a bell-shaped curve.