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:
Sep. 20, 1994
Filed:
May. 28, 1993
Kazutoshi Hirohashi, Yokohama, JP;
Hiroshi Horii, Tokyo, JP;
Hideo Koike, Kanagawa, JP;
Yoshiaki Yunoki, Tokyo, JP;
Tetsuo Fukasawa, Sagamihara, JP;
Susumu Katayama, Tokyo, JP;
Akio Yoshikawa, Kawasaki, JP;
Keishi Ushijima, Nagareyama, JP;
Takaaki Takeda, Fujisawa, JP;
Takeshi Nomoto, Yokohama, JP;
Michio Kikuta, Tokyo, JP;
Shunichi Shichijo, Yokosuka, JP;
Yoshiki Iwasaki, Yokohama, JP;
Victor Company of Japan, Yokohama, JP;
NTT Data Communications Systems Corporation, Tokyo, JP;
Abstract
An optical radio system includes a host device, an end device, and a repeater. The host device and the end device communicate with each other via the repeater by use of optical radio. The repeater includes a section for receiving a first light signal from one of the host device and the end device, a section for converting the received first light signal into a first electric signal, a section for frequency-converting the first electric signal into a second electric signal, and a section for generating a second light signal in response to the second electric signal and transmitting the generated second light signal. The repeater also includes a section for demodulating one of the first electric signal and the second electric signal into a baseband signal, a section for detecting a quality of the baseband signal, and a section for enabling transmission of the second light signal only when the detected quality of the baseband signal is equal to or greater than a predetermined quality.