The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2014
Filed:
Nov. 05, 2012
Sharp Kabushiki Kaisha, Osaka, JP;
Osaka University, Suita, JP;
National Institute of Information and Communications Technology, Koganei, JP;
Shimpei To, Chiba, JP;
Yasuhiro Hamaguchi, Chiba, JP;
Hideo Nanba, Chiba, JP;
Seiichi Sampei, Osaka, JP;
Hiroshi Harada, Konganei, JP;
Masafumi Moriyama, Koganei, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Osaka University, Osaka, JP;
National Institute of Information and Communications Technology, Tokyo, JP;
Abstract
Improving the accuracy of estimation of channel responses in receiving signals from a plurality of antennas is disclosed. A transmitting device of a base station includes a preamble A generating unit, a preamble B generating unit, phase rotating unitsand, multiplexing unitsand, an forward error correction coding unit, an S/P converting unit, a mapping unit, a changeover switch, IDFT (or IFFT) unitsand, P/S converting unitsand, GI (Guard Interval) inserting unitsand, D/A converting unitsand, radio transmitting unitsandand antenna unitsand. In the preamble A generating unitand the preamble B generating unit, a preamble A and a preamble B (see the packet format in FIG.) are generated, respectively. The preamble A is outputted to the multiplexing unitsand, while the preamble B is outputted to the phase rotating unitsand. The phase rotating unitsandto which the preamble B has been inputted give continuous phase rotation to subcarriers of the preamble B. In the transmitting device of the base station according to this embodiment, the phase rotating unitdoes not give phase rotation, but only the phase rotating unitgives phase rotation to the preamble B.