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:
Jun. 02, 2015
Filed:
Jun. 23, 2010
Yoshihisa Kishiyama, Tokyo, JP;
Kazuaki Takeda, Tokyo, JP;
Motohiro Tanno, Tokyo, JP;
Hidekazu Taoka, Tokyo, JP;
Yoshihisa Kishiyama, Tokyo, JP;
Kazuaki Takeda, Tokyo, JP;
Motohiro Tanno, Tokyo, JP;
Hidekazu Taoka, Tokyo, JP;
NTT DOCOMO, INC., Tokyo, JP;
Abstract
Provided is a downlink reference signal structure suitable for increase in number of transmission layers. A radio base station device () has a plurality of transmission antennas; a orthogonal RS sequence generator () for generating orthogonal reference signals based on a two-dimensional orthogonal code, the orthogonal reference signals being orthogonalized between downlink reference signals adjacent in two-dimensional directions of frequency direction and time direction to each other in one transmission layer and being orthogonalized in different transmission layers assigned to one radio resource; a multiplexer () for multiplexing transmission data and the orthogonal reference signals in the one transmission layer; and a transmitter for transmitting a transmission signal obtained by multiplexing the transmission data and the orthogonal reference signals, via the transmission antenna in transmission layers simultaneously.