A GI insertion section 105 inserts a guard interval into transmission data. Delay addition sections 107-1, 107-2 set a delay time in the transmission data. An arrival time calculation section 115 calculates for each directivity an arrival time after data is transmitted from the other party of communication...http://www.google.fr/patents/US7599401?utm_source=gb-gplus-shareBrevet US7599401 - Transmission device and transmission method
