Patent ID: 9413302
Filing Date: 2016-08-09
CPC Classification: H03F

Claim Text:
1. A digital predistortion apparatus, comprising: a nonlinear device configured to compensate for a nonlinear characteristic of a signal; a memory effect compensator configured to compensate for a memory effect characteristic of the signal; a constant value characteristic acquirer configured to process a feedback signal, so as to acquire constant value characteristic information of the signal; a side lobe information acquirer configured to process the feedback signal to as to obtain side lobe information of the feedback signal; a cost function generator configured to calculate a predistorted cost function according to the side lobe information of the feedback signal, the acquired constant value characteristic information and a predefined value, the predefined value being pre-obtained according to a modulation mode of the signal; and a coefficient updater configured to update a coefficient of the nonlinear device and a coefficient of the memory effect compensator according to the cost function.