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 ?
Hint: you could convert zero padded ofdm into cyclic ofdm at the receiver, and use the same equalization. Though there will be more noise on this scheme.
I had asked a puzzle some time back on this topic:
Modelling zero padded OFDM as circular convolution between channel and FFT frame