The Cyclic Prefix

Let’s discuss the DFT, before we attempt to equalize the impact of the wireless channel in this lesson.

Linear vs. circular convolution

In a continuous-time Fourier transform, the output of a system $y(t)$ for a given input $x(t)$ and impulse response $h(t)$ is given by:

$$y(t) = x(t) \ast h(t)$$ ...