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:
Mar. 02, 2010
Filed:
May. 13, 2005
Kenichi Higuchi, Yokohama, JP;
Hiroyuki Kawai, Yokosuka, JP;
Noriyuki Maeda, Yokohama, JP;
Mamoru Sawahashi, Yokohama, JP;
Kenichi Higuchi, Yokohama, JP;
Hiroyuki Kawai, Yokosuka, JP;
Noriyuki Maeda, Yokohama, JP;
Mamoru Sawahashi, Yokohama, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
A signal separation device is disclosed that is able to reduce a number of calculations required when separating a received signal transmitted from transmission devices into the individual transmission signal. The signal separation device includes a signal point derivation unit that multiplies the received signal with respective elements of a unitary matrix, and derives at least one received-signal signal point on a signal constellation diagram; a definition unit that defines plural sections on the signal constellation diagram, each of the sections including a predetermined number of signal points; a detection unit that detects a received-signal section from the sections, the received-signal section including the received-signal signal point; a selection unit that selects signal points in the received-signal section as candidates of the received-signal signal point; and a determination unit that determines the transmission signals based on the selected signal points.