A novel OFDM receiver with second order polynomial Nyquist window function

A class of time domain second order polynomial Nyquist window functions and a new receive method are proposed and applied to orthogonal frequency-division multiplexing for reducing frequency offset induced inter-carrier interference (ICI) in the receiver. As far as the delay spread is shorter than the guard interval, we can find a member of the class providing better signal to ICI ratio than the rectangular function and raised cosine function.