Patent ID: 6788923
Filing Date: 2004-09-07
Classification: H03G

Abstract:
A noise reducer for reducing noise included in a demodulated signal obtained by demodulation of a received radio signal, comprising:an electric-field-level decision unit comparing an electric-field strength of the radio signal with at least one predetermined reference value, thereby generating an indicator signal indicating said electric-field strength; a noise-detection unit receiving said demodulated signal and detecting said noise; a noise-width generation unit coupled to the electric-field-level decision unit and the noise-detection unit, generating gate pulses responsive to said indicator signal and to detection of said noise, the gate pulses generated when the indicator signal indicates a comparatively weak electric-field strength being lengthened in a relation to the gate pulses generated when the indicator signal indicates a comparatively strong electric-filed strength; and a correction unit coupled to the noise-width generation unit, modifying said demodulated signal during intervals indicated by the gate pulses, thereby reducing said noise.