Being the manner which transmits the data in the manner for the rear compatibility communication in the multiple antenna communication systems which use

摘要

In order for it to be possible, to interpret symbol with the lower-grade receiver following to frame work, method and the device which transmit symbol in the plural antenna communication systems are disclosed. The frame work which is disclosed has the regashi preamble which at least possesses one which is transmitted in on each one of the transmission antenna of N long training symbol and the additional long training symbol of N-1. As for the regashi preamble, for example, at least one shortly training symbol, at least one long training symbol, and it is possible to make the IEEE802.11a/g preamble which at least includes one SIGNAl place. The respective sequence of the long training symbol on each one of the transmission antenna of N long training symbol respectively crosses by introducing the phase shift in regard to each other, concerning time.