| 摘要 |
A predistortion control device ( 1 ). The device has a first predistortion control input connectable to a power amplifier output ( 21 ); a second predistortion control input ( 11 ) connectable to a signal contact of a predistortion device; and a predistortion control output ( 12 ) connectable to a control contact of the predistortion device. The predistortion control device ( 1 ) further includes a cross-correlator device ( 110 ). The cross-correlator device ( 110 ) is connected with a first cross-correlator input ( 1101, 1101 I, 1101 Q) to the first predistortion control input and a second cross-correlator input ( 1102, 1102 I, 1102 Q) to the second predistortion control input ( 11 ). The cross-correlator device ( 110 ) is further has a cross-correlator output ( 1112 ) at which a cross-correlation signal can be presented, the cross-correlation signal representing a measured cross-correlation of signals presented at the first cross-correlator input ( 1101, 1101 I, 1101 Q) and the second cross-correlator input ( 1102, 1102 I, 1102 Q). The predistortion control device ( 1 ) further has a predistortion function selector device ( 120 )( 120 ), connected with a selector input to the cross-correlator output ( 1112 ), and with a selector output to the predistortion control output ( 12 ), at which selector output a predistortion control signal can be presented. The predistortion control signal representing a predistortion function determined on the basis of said cross-correlator signal. |
