PROBLEM TO BE SOLVED: To reduce undesired signals (side lobes or the like) included in received signals.SOLUTION: Code data of received signals before or after weighting are inputted in a weight adder/subtractor 32. The weight adder/subtractor 32 carries out, with respect to each of the received signals, addition processing or subtraction processing of weight values on the basis of the code data of the received signals, and outputs an acquired result to an evaluation coefficient calculating section 36. A weight adder 34 adds the plurality of weight values and outputs an added result to the evaluation coefficient calculating section 36 for standardization. The evaluation coefficient calculating section 36 calculates an evaluation coefficient on the basis of a standardized weight addition/subtraction value. The received signal is multiplied by a smoothed evaluation coefficient as a gain.COPYRIGHT: (C)2011,JPO&INPIT【課題】受信信号に含まれる不要信号(サイドローブ等)を効果的に低減する。【解決手段】重み付け前または後の受信信号の符号データが重み加減算器32に入力される。重み加減算器32は、各受信信号について、当該受信信号の符号データに基づき重み値の加算処理または減算処理を実行し、その結果を評価係数算出部36へ出力する。重み加算器34は複数の重み値を加算し、それを規格化のために評価係数算出部36へ出力する。評価係数算出部36は規格化された重み加減算値に基づいて評価係数を算出する。平滑化後の評価係数が利得として受信信号に乗算される。【選択図】図2
