# ZP-OFDM vs. CP-OFDM channel equalization

Now, I am working on OFDM equalization, according to what I understood, Adding CP into the OFDM block change the convolution from linear to circular. That circular convolution enables using point-wise equalizer or one tap equalizer such that ZF or MMSE equalizer.

ZP-OFDM is a different scheme, where the CP is replaced by zeros. As I understood, ZP-OFDM should achieve the same performance of CP but under more complex equalization.

So, What means by complex equalization?? Is it time-domain equalization ? Could someone explain for me which equalizer we can adopt with ZP-OFDM in order to achieve similar/near performance of CP-OFDM ?

• Additionally, I think that is feasible in case if the length of channel $L$ is known. – Fatima_Ali Jul 13 '20 at 9:45