Convolution Convolution is a mathematical way of combining two signals to form a third signal. It is the single most important technique in Digital Signal Processing. Using the strategy of impulse decomposition, systems are described by a signal called the impulse response. Convolution is important because it relates the three signals of interest: the input signal, the output signal, and the impulse response. This chapter presents convolution from two different viewpoints, called the input side algorithm and the output side algorithm. "Circular convolution The circular convolution , also known as cyclic convolution , of two aperiodic functions (i.e. Schwartz functions ) occurs when one of them is convolved in the normal way with a periodic summation of the other function. That situation arises in the context of the Circular co nvolution theorem . The identical operation can also be expres...
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