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. 28, 2013
Filed:
Nov. 01, 2002
Hiroaki Takano, Saitama, JP;
Kazuhisa Takamura, Tokyo, JP;
Jun Iwasaki, Tokyo, JP;
Sony Corporation, , JP;
Abstract
A radio wave detecting apparatus that can perform carrier sense of radio waves subjected to spread spectrum with a simple configuration, in which a spread code is multiplied by an information signal, the band is spread, and a spread information signal is generated. A beacon signal in a predetermined band is synthesized with the spread information signal, and a synthesized signal is transmitted as a radio wave. Furthermore, only a signal component in a predetermined band is extracted from a received radio wave, so that a beacon signal is separated. The presence of a radio wave is detected based on the receiving power of the separated beacon signal. If the presence of the radio wave is detected, the transmission of the radio wave is stopped.