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:
Jul. 10, 2007
Filed:
Apr. 05, 2002
Takatoshi Sugiyama, Yokohama, JP;
Yusuke Asai, Yokohama, JP;
Satoshi Kurosaki, Yokosuka, JP;
Masahiro Umehira, Yokohama, JP;
Daisei Uchida, Yokohama, JP;
Yasuo Suzuki, Yokosuka, JP;
Takatoshi Sugiyama, Yokohama, JP;
Yusuke Asai, Yokohama, JP;
Satoshi Kurosaki, Yokosuka, JP;
Masahiro Umehira, Yokohama, JP;
Daisei Uchida, Yokohama, JP;
Yasuo Suzuki, Yokosuka, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An OFDM signal communication system used in broadband mobile communication, achieves stable operation under severe frequency selective fading environments, giving high quality. The OFDM signal communication system which transmits OFDM signals over the same radio frequency from N transmitting antennas, has an inverse matrix computer for computing an N×N inverse matrix constituted by propagation coefficients for respective propagation paths between each of N transmitting antennas and each of N receiving antennas, and a subcarrier demodulator which separates the signals of the respective propagation paths, based on the obtained inverse matrix.