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:
Dec. 18, 2018
Filed:
Nov. 20, 2017
Hitachi, Ltd., Tokyo, JP;
Ken Takei, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A wireless system allows for selectively using, and communicating through, wireless propagation paths between radio devices in an over-the-horizen communication environment. Also an elevator control system and a substation monitoring system using the same are provided. The wireless system includes a transmitter having: two spatially orthogonal antennas; and a transmission circuit that transmits a signal having an information signal spread with one code and then superimposed on a circularly-polarized wave, along with a signal having the same information signal spread with two different codes and then superimposed on orthogonal statically-polarized waves, which are orthogonal to each other, and a receiver having: at least one antenna; and a reception circuit that takes a difference between the sum of two operation results obtained by despreading with two different codes a signal received through statically-polarized waves, and an operation result obtained by despreading with one code a signal received through a circularly-polarized wave.