ABSTRACT
Several fundamental ways to process digital signals involve combining two or more arrays together using an operator. By combining arrays together with different operators, it is possible to perform digital summing, ring modulation, amplitude fades, and amplitude modulation. Signals can be combined by adding together the amplitude of each signal. For digital signals, this involves adding the amplitude at one time sample for one signal with the amplitude at the same time sample for the other signal(s). Therefore, the addition of digital signals in MATLAB is accomplished by an element-wise addition of arrays. An exponential fade can be used to increase or decrease the amplitude of a signal based on a curved, exponential function. There are two general types of exponential fades: concave and convex. In both types, the shape of the curve can be variably changed based on the value of an exponent.
