Adaptive overlap and add circuit and method for zero-padding OFDM system

摘要

The invention relates to an Overlap and Add circuit, and in particular, an adaptive Overlap and Add circuit. The adaptive OLA circuit comprises a detection unit, an estimator, and an OLA circuit. The detection unit estimates a channel property according to an OFDM signal received through a channel. The estimator estimates an OLA length in a current OFDM symbol of an OFDM signal according to a channel property. The OLA circuit copies an OLA signal to an FFT window in the current symbol according to the OLA length.