A method and apparatus for joint time and frequency synchronization for orthogonal frequency division multiplexing (OFDM) systems. A multitone pilot signal is sent in a designated OFDM symbol period. The receiver synchronizes to the pilot signal in a two-stage procedure. The first stage estimates the...http://www.google.com.au/patents/US7558245?utm_source=gb-gplus-sharePatent US7558245 - Method and apparatus for time and frequency synchronization of OFDM communication systems
