Patent ID: 8265700

Claim:
A radio apparatus, comprising: a generating unit configured for generating a burst signal that comprises: (1) STS(s) (Short Training Sequence(s)) for AGC (Automatic Gain Control), operative in a MIMO system assigned to N of M streams, where N and M are integers, N is less than M, and N is equal to or greater than 1, (2) LTSs (Long Training Sequences) for channel estimation, operative in the MIMO system assigned to the respective M streams, and (3) data assigned to the N of M streams, each of the N of M streams including the STS, the LTS, and the data in that order in a time sequence; and a plurality of antennas configured for transmitting the burst signal generated by the generating unit, wherein transmitting timing of the LTS assigned to the N of M streams is different from that of another LTS which is not assigned to the N of M streams.