Patent ID: 7039095

Claim:
A receiving apparatus in a communication terminal apparatus that performs CDMA digital radio communication with a base station apparatus in a cell to which said communication terminal apparatus belongs, said receiving apparatus comprising: an automatic gain controller that applies a calculated gain coefficient to signals received by first and second antennas to produce first and second gaincontrolled signals, respectively; a despreader that despreads the first and second gain-controlled signals to produce first and second despread signals, respectively; a MUD-type interference canceller that cancels interference signals from the first and second despread signals to produce first and second interference-cancelled signals, respectively; a combiner that combines the first and second interference-cancelled signals; a user judger that detects, from each of the first and second despread signals, a maximum path of a signal for the communication terminal apparatus and maximum paths of signals for other communication terminal apparatuses in the cell transmitted from the base station apparatus; an electric field strength calculator that adds, for each of the first and second despread signals, individual electric field strengths of the maximum path signals to calculate first and second total sums, respectively; a selector that selects the greater of the first and second total sums; a gain coefficient calculator that calculates the gain coefficient based on a difference between the selected total sum and a predetermined target.