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:
May. 21, 2002
Filed:
May. 26, 1999
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Radio base stations subject each code-division multiplex signal to frequency conversion so as to vary each frequency thereof according to the radio base stations and then converts the signal to an optical signal before transmitting the same to a switching station. The switching station multiplexes the optical signals, subjects a signal obtained after multiplexing to optical-electrical conversion, and extracts the code-division multiplex signal from the respective electrical signal obtained after the conversion. Consequently, each signal to be demodulated by demodulating sections includes nothing but the code-division multiplex signal outputted from the radio base stations. Therefore, a code-division multiplex signal outputted from a desired base station is not disturbed by code-division multiplex signals outputted from the other stations as a noise as will be in a conventional system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile