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:
Jun. 16, 2015
Filed:
Jan. 12, 2012
Keiju Ito, Tokyo, JP;
Keiju Ito, Tokyo, JP;
HITACHI KOKUSAI ELECTRIC INC., Tokyo, JP;
Abstract
In an automatic gain control device, an average power detection circuit detects the average power of a received signal in a specific period, a peak to average power ratio calculation circuit calculates a peak to average power ratio value, a threshold calculation circuit obtains the maximum peak to average power ratio (PAPR) so as to determine as a threshold the result of subtracting the value of the PAPR from the full scale value of an A/D converter. A gain control circuit identifies the gain on the basis of the value of the average power and the determined threshold, and a variable gain amplifier amplifies the received signal which is input using the identified gain.