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:
Nov. 30, 2010
Filed:
Aug. 13, 2007
Yasunori Futatsugi, Tokyo, JP;
Yasunori Futatsugi, Tokyo, JP;
Nec Corporation, Tokyo, JP;
Abstract
A radio transmitting apparatus includes a calibration reference signal generator for generating a calibration reference signal for each of the subcarriers to be calibrated, a subcarrier modulator for modulating the calibration reference signal with the subcarrier, a radio transmitter for frequency-converting a baseband signal, which is the modulated signal, into a transmission signal in a radio frequency band, a radio receiver for frequency-converting the transmission signal in the radio frequency band supplied from the radio transmitter, into a baseband signal, a calibration coefficient measurer for calculating a calibration coefficient from the baseband signal output from the radio receiver, and a calibration coefficient multiplier for multiplying a transmission signal for each of the subcarriers and each of the antenna elements, by the calculated calibration coefficient.