Patent ID: 7352798

Claim:
A CDMA receiving device for estimating a signal power and an interference noise power of a received signal for each of a plurality of fingers, and combining a demodulated signal by using a signal-power-to-interference-noise-power ratio estimated from the estimated signal power and interference noise power of each of the plurality of fingers, characterized by: interference-noise-power calculation means ( 106 , 206 , 306 , 406 ) for estimating an interference noise power for each of the plurality of fingers during a current slot; storage means ( 110 , 217 , 317 , 425 ) for storing therein an estimated value for the interference noise power estimated for each of the plurality of fingers during a last valid slot before the current slot; first averaging means ( 108 , 208 , 308 , 408 ) for averaging, for each of the plurality of fingers, the interference noise power estimated during the current slot by said interference-noise-power calculation means for a finger ( 106 , 206 , 306 , 406 ) and the estimated value for the interference noise power stored in said storage means ( 110 , 217 , 317 , 425 ) during the last valid slot before the current slot for the finger to generate an averaged estimated value for the interference noise power; first judging means ( 115 , 213 , 313 , 421 ) for judging when each of the plurality fingers encounters a valid slot after a radio link is established; and first switching means ( 112 , 215 , 315 , 423 ) for coupling said interference noise power calculation means ( 106 , 206 , 306 , 406 ) to said storage means ( 110 , 217 , 317 , 425 ) based on a judged result by said first judging means ( 115 , 213 , 313 , 421 ).