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. 06, 1988
Filed:
Sep. 18, 1986
Toshihiko Ryu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A one frequency repeater includes a receiver for receiving a reception signal through a receiving antenna, a variable frequency characteristic filter for generating a signal for cancelling an interference signal caused by leakage of a transmission signal into a receiving antenna, an adder for adding the interference signal and the reception signal, a demodulator for demodulating an output signal from the adder, a data converter for converting an output signal from the modulator, a modulator for modulating a carrier according to an output from the data converter, and a transmitter for transmitting from a transmitting antenna an output signal modulated by the modulator. The variable frequency characteristic filter receives the signal modulated by the modulator, is controlled in response to a control signal including the output from the data converter, and supplies the interference cancellation signal to the adder.