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:
Sep. 28, 2004
Filed:
Dec. 21, 2001
Jong Yoon Hwang, Sungnam, KR;
Sung Jin Kim, Suwon, KR;
Ju Ho Lee, Suwon, KR;
Yong Suk Lee, Suwon, KR;
Abstract
Disclosed is a base station transmission apparatus in a mobile communication system using transmit antenna diversity between a base station with a plurality of antennas and a mobile station. A modulator generates a complex symbol in response to a coded symbol. A first spreader generates a plurality of different complex symbols in response to the complex symbol, and generates a plurality of first spread complex symbols by spreading the generated complex symbols with a first orthogonal code assigned to the mobile station. A second spreader generates a plurality of same complex symbols in response to the complex symbol from the modulator, spreads the same complex symbols with a second orthogonal code, and generates a plurality of second spread complex symbols by multiplying the spread complex symbols by weights for the antennas, determined based on feedback information indicating reception status of a base station signal. A summer sums up the first complex symbols and the second complex symbols. Finally, a transmitter complex-spreads an output of the summer, shifts the complex-spread signals to a radio frequency band, and transmits the shifted signals through the antennas.