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. 14, 2006
Filed:
Oct. 25, 2001
Yasunori Suzuki, Yokohama, JP;
Ning Chen, Yokohama, JP;
Yoshiaki Tarusawa, Yokosuka, JP;
Toshio Nojima, Yokosuka, JP;
Yasunori Suzuki, Yokohama, JP;
Ning Chen, Yokohama, JP;
Yoshiaki Tarusawa, Yokosuka, JP;
Toshio Nojima, Yokosuka, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
A divider/combiner unit combines RF signals, then converts the combined signal into an optical signal and sends it over an optical fiber. N radio access units each convert the optical signal received from the optical fiber into an RF signal and transmits it from an antenna, and each radio access unit converts an RF signal received by the antenna into an optical signal and sends it over an optical fiber to the divider/combiner unit. The divider/combiner unit converts the received optical signal into RF signals and outputs them. This system is operated as plurality of communication systems in common to them in correspondence to a plurality of input/output terminals of the divider/combiner unit.