Patent ID: 7949040

Claim:
A reception quality measuring apparatus which converts a pilot signal included in a single carrier signal from a signal in a time domain to a signal in a frequency domain, and measures reception quality of the single carrier signal based on an equalized signal after equalization is performed, said apparatus comprising: a first sub-carrier averaging unit for averaging and outputting a channel gain after equalization that is estimated on the basis of the pilot signal over a sub-carrier; a first power calculation unit for calculating the power of a signal output from said first sub-carrier averaging unit and outputting the same as signal power; a pilot replica generator for generating and outputting a pilot signal replica with respect to a zero-timing signal component after equalization based on a signal output from said first sub-carrier averaging unit, and also based on a pilot code characteristic; a subtractor for subtracting the pilot signal replica output from said pilot replica generator from the equalized signal and outputting the result as an interference signal; a second power calculation unit for calculating and outputting the power of the interference signal output from said subtractor; a second sub-carrier averaging unit for averaging the power output from said second power calculation unit over the sub-carrier and outputting the result as interference power; and a divider for dividing the signal power output from said first power calculation unit by the interference power output from said second sub-carrier averaging unit to calculate reception quality after equalization.