Cyclic prefix alludes to the prefixing of a symbol. The receiver is regularly arranged to discard the cyclic prefix samples. The cyclic prefix serves two purposes:
First is, It gives a guard interval to remove intersymbol interference from the symbol.
Second is, It repeats the finish of the symbol so the linear convolution of a recurrence multipath channel can be displayed as circular convolution, which changes to the frequency domain via a discrete Fourier transform. This methodology obliges basic frequency domain processing.