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:
May. 03, 2016
Filed:
Oct. 06, 2011
LU Wu, PuDong Jinqiao Shanghai, CN;
Hongwei Yang, PuDong Jinqiao Shanghai, CN;
Hao Liu, PuDong Jinqiao Shanghai, CN;
Lu Wu, PuDong Jinqiao Shanghai, CN;
Hongwei Yang, PuDong Jinqiao Shanghai, CN;
Hao Liu, PuDong Jinqiao Shanghai, CN;
Alcatel Lucent, Boulogne-Billancourt, FR;
Abstract
The embodiments of the present invention disclose a method and an apparatus for sub-sampling of a codebook in the LTE-A system where a precoding matrix W is a product of two matrices Wand W, i.e. W=WW, codebooks for W, Wand Ware denoted as C, Cand Crespectively, and r indicates a rank. The method includes sub-sampling the codebook C such that the sub-sampled codebook C has a size of equal to or less than 4 bits. In the sub-sampling, codewords evenly distributed in the codebook C are extracted, where some or all of the codewords are in a form of discrete Fourier transform (DFT) vector to be suitable for evenly linear arrays, and the other codewords are suitable for cross-polarized linear arrays.