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:
Aug. 08, 2006
Filed:
Apr. 10, 2003
Takaaki Kishigami, Kanagawa, JP;
Takashi Fukagawa, Kanagawa, JP;
Yasuaki Yuda, Kanagawa, JP;
Keiji Takakusaki, Kanagawa, JP;
Shoji Miyamoto, Miyagi, JP;
Takaaki Kishigami, Kanagawa, JP;
Takashi Fukagawa, Kanagawa, JP;
Yasuaki Yuda, Kanagawa, JP;
Keiji Takakusaki, Kanagawa, JP;
Shoji Miyamoto, Miyagi, JP;
Abstract
A path search circuit according to the present invention has an orthogonal multi-beam forming sectionfor directional reception with a plurality of orthogonal multi-beams orthogonal one to another, correlation-operating sectionsM for correlation-operating outputs of the orthogonal multi-beam forming sectionwith a known signal, weight multiplying sectionsNb for multiplying the output of the correlation-operating sectionM by a weight converted into a beam space, delay profile generating sectionsNb for generating delay profiles from the output signals of the weight multiplying sectionsNb, and a path detecting sectionfor detecting a reception timing and arrival direction of arrival path from the delay profile. This path search circuit can enhance the accuracy of path direction detection by the use of a directional reception signal, and further reduce the direction dependence of path timing detection accuracy.