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:
Mar. 28, 2000
Filed:
Sep. 19, 1997
Soichi Tsumura, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A radio apparatus includes a first variable-gain circuit, a second variable-gain circuit, and a demodulator, wherein a band-pass filter is provided between the first and second variable-gain circuits and the demodulator inputs an output of the second variable-gain circuit. An error occurrence probability is detected from an output of the demodulator and a signal level is detected from the output of the second variable-gain circuit. A received signal strength is estimated from the signal level of the output of the second variable-gain circuit using an aggregate gain from the first variable-gain circuit to the second variable-gain circuit, and then the respective first and second gains of the first and second variable-gain circuits are changed in opposite directions depending on the error occurrence probability and the estimated received signal strength.