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:
Apr. 27, 2004
Filed:
Oct. 30, 2000
Takeshi Ohba, Kawasaki, JP;
Atsushi Yamashita, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method of stabilizing frequency of an output signal of a data-relay apparatus provided in a radio communication system that includes a relay station and a radio terminal device, wherein the data-relay apparatus receives a signal as an input signal from the relay station, and transmits the signal as an output signal to the radio terminal device. The method includes the steps of demodulating the output signal to generate a demodulated signal by use of a first signal, detecting frequency deviation of the output signal from the demodulated signal, generating the first signal according to the detected frequency deviation of the output signal, and generating a second signal to mix with the input signal to generate the output signal according to the generation of the first signal and the second signal being carried out such that the detected frequency deviation of the output signal becomes substantially zero.