Even and Odd Signal. One of characteristics of signal is symmetry that may be useful for signal analysis. Even signals are symmetric around vertical axis, and Odd signals are symmetric about origin. It is an important fact because it is relative concept of Fourier series. In Fourier series, a periodic signal can be broken into a sum of sine and cosine signals. Notice that sine function is odd signal and cosine function is even signal. For Kinetic energy is given by. Signals power. Therefore, for a signal possessing energy to have zero power I guess you could say that it is not losing or gaining any energy i.e. it is in equilibrium. By contrast, if something is giving off power and is still in energy equilibrium it must have infinite energy. Signals power. Let us try to approach to the answer in a mathematical way. From the conception of energy of a signal we have the energy of a signal as. Signals power. Signals typically represent physical variables such as displacement, velocity, pressure, energy, . In most cases, we are concerned with variables that are time-dependent . In signal processing, the maximum signal amplitude is typically chosen as the reference amplitude. In other words, signals are normalized so that the maximum amplitude is 1, or 0 dB.