In an OFDM signal individual OFDM carriers are modulated by samples of signals which can only take a limited range of allowed values and a block of samples modulates the group of carriers during a time period T. In a receiver, the signal modulating an individual OFDM carrier may be demodulated by estimating...http://www.google.de/patents/US5345440?utm_source=gb-gplus-sharePatent US5345440 - Reception of orthogonal frequency division multiplexed signals
