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:
Dec. 07, 1999
Filed:
Jun. 22, 1998
Tetsuya Takaki, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A radio receiver is provided, which prevents the sensitivity of the receiver from degrading even if the receiver is applied to a communication system using a plurality of channels with unequal transmission powers. This radio receiver is comprised of an antenna for receiving a wanted RF signal; a variable-gain RF amplifier for amplifying the wanted RF signal to output an amplified, gain-controlled RF signal, a frequency converter for frequency-converting the amplified, gain-controlled RF signal to output an IF signal, a variable gain IF amplifier for amplifying the IF signal to output an amplified, gain-controlled IF signal, a despreader for despreading the amplified, gain-controlled IF signal to output a baseband signal, a Fourier transformer for conducting a Fourier transformation with respect to the baseband signal, a jamming-wave detector for detecting a jamming wave existing in a frequency range of the wanted RF signal, a demodulator for demodulating the baseband signal to output an information signal, an error-rate calculator for calculating an error rate of the information signal, and a controller for controlling gains of the variable-gain RF amplifier and the variable-gain IF amplifier.