| 摘要 |
PROBLEM TO BE SOLVED: To improve the characteristics of a CDMA receiver equipped with a plurality of antennas by making manual adjustment unnecessary. SOLUTION: This CDMA receiver contains AGC amplifiers 61 and 62, AGC gain cancellers 211 and 212, and offset adjusting circuits 1011, 1012, 1021 and 1022 and gain adjusting circuits 1111, 1112, 1121 and 1122 provided in the preceding stages of AD converters 1011, 1012, 1021 and 1022 correspondingly to the antennas 11 and 12. The receiver is also provided with AGC control circuits 171 and 172, DA converters 181 and 182 which convert gain control signals from the control circuits 171 and 172 into analog signals to be added to the amplifiers 61 and 62, and memories 191 and 192 which add gains to the gain cancellers 211 and 212 so as to cancel the gains correspondingly to the antennas 11 and 12. |
