# Simplified Convolution

Explore a simplified method of convolution that is suitable for discrete-time systems.

## We'll cover the following

Let’s revisit the definition of the convolution expression between the two signals $x[n]$ and $h[n]$.

$y[n] = \sum_m x[m]h[n-m]$

We now know how it can be more easily implemented in discrete-time systems.

## Discrete-time implementation

A simplified method implements this procedure right out of the definition itself.

$y[n] = \cdots + x[-1]h[n+1] + x[0]h[n-0]+x[1]h[n-1]+x[2]h[n-2]+\cdots$

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