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. 22, 2014
Filed:
Jul. 11, 2012
Siva Dharshan Muruganathan, Kanata, CA;
Tarik Tabet, Montreal, CA;
Chandra Sekhar Bontu, Kanata, CA;
Yi Song, Irving, TX (US);
Zhijun Cai, Irving, TX (US);
Siva Dharshan Muruganathan, Kanata, CA;
Tarik Tabet, Montreal, CA;
Chandra Sekhar Bontu, Kanata, CA;
Yi Song, Irving, TX (US);
Zhijun Cai, Irving, TX (US);
BlackBerry Limited, Waterloo, Ontario, CA;
Abstract
Systems, methods, and apparatuses for phase-rotated reference signals are provided. In accordance with one implementation, phase-rotated reference signals are transmitted from multiple transmit antennas on the same reference signal (RS) resource elements. The receiver may determine channel coefficients for links corresponding to the multiple antennas, based on the received signals at the RS resource elements. Time-domain filtering or frequency-domain orthogonal codes may be used to determine the channel coefficients for links corresponding to the multiple antennas. The phase-rotation information may be broadcasted in a system information block (SIB) message or signaled in a radio resource control (RRC) message.