Patent ID: 7386029

Claim:
A reception apparatus for receiving a signal wherein a common pilot channel signal spread with a spreading code of a predetermined spreading factor and packet channel signals spread with a spreading code of a smaller spreading factor than the predetermined spreading factor are code-multiplexed, the reception apparatus comprising: a despread section that despreads the received signal with the spreading code for the common pilot channel signal; a noise equivalent value calculation section that calculates a value that is equivalent to a noise component in size using an input signal vector indicating a despreading result of the despread section and a constant which is dependent on a difference between the spreading factor of the common pilot channel signal and the spreading factor of the packet channel signals; a correlation matrix and correlation vector calculation section that calculates an autocorrelation matrix of the input signal vector and a cross correlation vector between the input signal vector and a desired signal vector using the value equivalent to the noise component in size calculated by the noise equivalent value calculation section; a weight calculation section that calculates a weight used for an equalization from the autocorrelation matrix and the cross correlation vector calculated by the correlation matrix and correlation vector calculator; and an adaptive equalization section that equalizes waveform distortions of the received signal using the weight calculated by the weight calculation section.