Signals Are Everywhere

The world of signals encompasses almost everything in our universe.

The universe

Since the creation of time, everything that moves generates signals in a never-ending cycle. Some notable examples include:

• The spinning of galaxies, stars, and planets
• The internal chemical activities of celestial bodies
• Heat and storm patterns
• Light and other electromagnetic waves
• Temperature variations
• Ocean currents

It is only by recording the signals generated from these activities and applying DSP algorithms that we have gained so much knowledge about our universe. For example, a 1% change in the amplitude of light coming from a faraway star can indicate the presence of a Jupiter-sized planet in its orbit.