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:
Sep. 21, 2004
Filed:
Mar. 05, 2003
Takahito Ishii, Tokyo, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
A receiving level measuring circuit, which is capable of improving measuring accuracy of a receiving level by correcting phase rotation caused by a frequency error between oscillators included in a transmitter and a receiver and by inhibiting an inappropriate correction when no desirable wave exists and is adapting to a receiver configuration having a plurality of antennas (branches), wherein a desirable/interference wave detection unit detects a frequency error vector, an adder, a frequency error averaging unit, and an arctangent operation unit add up and average the frequency error vectors and performs a unit conversion of the resultant value, a frequency error correction table previously stores a correction value corresponding to the frequency error so as to get the correction value corresponding to the frequency error, an adder adds up a plurality of desirable wave components, and a frequency error correction unit corrects the desirable wave component by using the correction value.