CDMA reception device

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).