Patent ID: 8655295

Claim:
A receiving apparatus comprising: a variable gain amplifier configured to amplify a first received signal by a variable gain to generate a second received signal; a comparator configured to compare a signal level of the second received signal with a first threshold to generate a third received signal, a signal level of the third received signal being set to a high signal if the signal level of the second received signal is greater than the first threshold, the signal level of the third received signal being set to a low signal if the signal level of the second received signal is not greater than the first threshold; and a signal processor configured to determine presence of a signal if a rate of high signals in third received signals for a period is greater than a second threshold, and perform a control of the gain and a demodulation processing based on a determination result, wherein the signal processor is configured to set a first value as the second threshold for a first period in which the control of the gain is performed and to set a second value as the second threshold for a second period in which the demodulation processing is performed, and the first value is greater than the second value.