Patent ID: 6122332
Filing Date: 2000-09-19
Classification: H03G

Abstract:
A high-frequency radio signal receiving apparatus for digital communication, comprising:a receiving antenna for receiving a high frequency radio wave;a frequency converter for converting a signal supplied from said receiving antenna into a signal of an intermediate frequency band;impulsive noise detecting means for detecting impulsive noise on the basis of a signal outputted from said frequency converter;impulsive noise correcting means for correcting the signal outputted from said frequency converter in dependence on a signal outputted from said impulsive noise detecting means, said impulsive noise correcting means including:an on/off-type two-terminal switch; andan attenuator connected to said on/off-type two-terminal switch in parallel, and for attenuating a signal when said on/off-type two-terminal switch is opened,wherein when a signal indicating detection of impulsive noise is outputted from said impulsive noise detecting means, said on/off-type two-terminal switch of said impulsive noise correcting means is opened to thereby allow the signal outputted from said frequency converter to be attenuated by said attenuator, whereby the impulsive noise is suppressed from the signal outputted from said frequency converter without increasing a reception error ratio; anddemodulating means for demodulating a signal outputted from said impulsive noise correcting means.