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:
Oct. 09, 2007
Filed:
Apr. 05, 2002
Wen Tong, Ottawa, CA;
Yuri S. Shinakov, Moskow, RU;
Alexandre M. Chloma, Moskovskaja Oblast, RU;
Mikhail G. Bakouline, Moskovskaha Oblast, RU;
Vitali B. Kreindeline, Moskow, RU;
Wen Tong, Ottawa, CA;
Yuri S. Shinakov, Moskow, RU;
Alexandre M. Chloma, Moskovskaja Oblast, RU;
Mikhail G. Bakouline, Moskovskaha Oblast, RU;
Vitali B. Kreindeline, Moskow, RU;
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
In a transmitter of a wireless communications system having M transmit antennas (), each transmit antenna is supplied with a respective combined signal comprising a respective one of M groups each of N data sub-streams, orthogonally spread by N Walsh code sequences (Wto WN). The N orthogonal code sequences used for each of the M groups comprise a respective one of M different combinations of N from Northogonal code sequences, where N>N. M and N are integers greater than one. The combined signals can also include orthogonally spread pilot signals (WP) for channel estimation at a receiver. Orthogonality of the signals transmitted from the transmit antennas is increased, so that transmit signal power can be decreased and/or the receiver can have fewer than M receive antennas.