Patent ID: 7792151

Claim:
A CDMA receiving apparatus characterized by comprising: a radio reception unit which outputs a radio reception output for an uplink communication channel on which an individual channel occupied by each user and a shared channel shared among all users are multiplexed on the basis of a CDMA scheme, by performing signal processing for a radio band signal received by a reception antenna; a channel estimation circuit which receives a signal corresponding to an individual channel of an arbitrary user which is obtained by performing despreading operation for the radio reception output, and calculates a channel estimation value indicating phase and amplitude fluctuations due to a channel from phase/amplitude information after despreading of a known Pilot portion symbol; a channel estimation value correction circuit which corrects the channel estimation value from said channel estimation circuit on the basis of a reception power fluctuation due to uplink transmission power control which is caused by a timing offset between the individual channel of the user and the shared channel; and a shared channel demodulation circuit which demodulates a signal corresponding to the shared channel of the user which is obtained by performing despreading operation for the radio reception output on the basis of the channel estimation value corrected by said channel estimation value correction circuit.