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:
Apr. 16, 2013
Filed:
Apr. 21, 2010
Wen Tong, Ottawa, CA;
Ming Jia, Ottawa, CA;
Peiying Zhu, Kanata, CA;
Alexandre Mikhailovich Chloma, Moscow, RU;
Mikhall Germanovich Bakouline, Moskovskaya obl., RU;
Vitali Borisovich Kreindeline, Moscow, RU;
Wen Tong, Ottawa, CA;
Ming Jia, Ottawa, CA;
Peiying Zhu, Kanata, CA;
Alexandre Mikhailovich Chloma, Moscow, RU;
Mikhall Germanovich Bakouline, Moskovskaya obl., RU;
Vitali Borisovich Kreindeline, Moscow, RU;
Research In Motion Limited, Ontario, CA;
Abstract
Although orthonormal space-time coding matrices provide for optimal communication system performance in that associated correlation matrices include no non-zero off-diagonal elements, unity code rate orthonormal coding matrices are difficult to identify for arbitrary communication network equipment. According to embodiments of the present invention, non-orthonormal space-time coding matrices, for which associated correlation matrices include non-zero off-diagonal elements, are used to encode data symbols. The non-orthonormal space-time coding matrices are more easily determined, and undesirable effects of the non-zero off-diagonal components are reduced by selecting a coding matrix from among a number of such matrices. For example, a particular space-time coding matrix may be selected from a number of generated space-time coding matrices based on a number of non-zero off-diagonal elements or a power of a trace of the associated correlation matrices.