Patent ID: 7482958

Claim:
An OFDM receiver which receives an orthogonal frequency division multiplex-modulated wireless signal and converts the same into an intermediate frequency signal and which amplifies the intermediate frequency signal by a variable gain amplifier and thereafter processes the same so as to be converted into a digital signal by an analog-digital converter, comprising a level control section including: comparators which respectively compare a signal level outputted from the analog-digital converter with threshold values; counters which respectively count frequencies with which the signal level exceeds the threshold values, based on the results of comparison by the comparators; a moving average unit which calculates an average value of the signal level lying within a predetermined period on the basis of the frequencies counted by the counters; and a digital-analog converter which generates a gain control signal for controlling the variable gain amplifier in such a manner that an average level of the digital signal outputted from the analog-digital converter reaches a predetermined value, according to the average value calculated by the moving average unit.