| US 7,519,127 B2 | ||
| Wireless transmission device and wireless receiving device | ||
| Yasuhiko Tanabe, Kawasaki (Japan); Daisuke Takeda, Kawasaki (Japan); Tsuguhide Aoki, Kawasaki (Japan); and Kohsuke Harada, Yokohama (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Jul. 25, 2005, as Appl. No. 11/187,853. | ||
| Claims priority of application No. 2004-219197 (JP), filed on Jul. 27, 2004. | ||
| Prior Publication US 2006/0023667 A1, Feb. 02, 2006 | ||
| Int. Cl. H04B 7/02 (2006.01) | ||
| U.S. Cl. 375—267 [375/347; 370/334] | 13 Claims |
| 1. A wireless transmission device which communicates with a wireless reception device, comprising:
a transmission-signal-generating unit configured to generate a plurality of transmission signals, respective transmission
rates thereof being different transmission rates that are determined in accordance with combinations of coding rates and modulation
schemes;
a controller configured to assign a plurality of different preamble signals to the plurality of transmission signals, respectively,
according to ranks of the plurality of transmission signals arranged in order corresponding to the different transmission
rates, the different preamble signals corresponding to the ranks, respectively, and being used for an estimation of channel
responses at the wireless reception device;
a preamble adder which adds, to each transmission signal of the plurality of transmission signals, one of the different preamble
signals that corresponds to a rank of the transmission signal; and
a plurality of transmission units configured to transmit the plurality of transmission signals with the preamble signals added
thereto, the plurality of transmission units including respective transmission antennas.
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