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, 2008
Filed:
Dec. 31, 2002
Kyung-hi Chang, Daejeon, KR;
Yun-hee Kim, Daejeon, KR;
Yong-soo Cho, Seoul, KR;
Kyung-won Park, Jeollanom-do, KR;
Kyung-Hi Chang, Daejeon, KR;
Yun-Hee Kim, Daejeon, KR;
Yong-Soo Cho, Seoul, KR;
Kyung-Won Park, Jeollanom-do, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Disclosed is a transmitting and receiving method for reducing a time-varying channel distortion in an orthogonal frequency division multiplex (OFDM) system. In the present invention, the transmitter defines M sub-channels in one data group, mathematically analyzes a change of channel for each path causing a time-varying channel distortion in a high-speed mobile environment by approximation, calculates a weight value based on the mathematical analysis and assigns the calculated weight value to transmit data of each sub-channel. Subsequently, the receiver combines the signals of these M sub-channels and demodulates the combined signals. Accordingly, the present invention greatly reduces a distortion caused by the time-varying channel to improve a bit error rate and a channel estimation performance.