Patent ID: 8548402

Claim:
A power amplification device, comprising: a power control module configured to perform power adjusting on an input signal; a power amplification module configured to perform power amplification on the signal subjected to the power adjusting by the power control module; and a pre-distortion module configured to compensate for nonlinear characteristic of the power amplification module; wherein said power control module is coupled between said pre-distortion module and said power amplification module in series; alternatively, said pre-distortion module is coupled between said power control module and said power amplification module in series; wherein said power control module performs power adjusting on the input signal according to a power adjusting coefficient only upon startup of said power amplification device; wherein said pre-distortion module performs pre-distortion self-adaptive algorithm searching in accordance with an output signal of said power amplification module, performs pre-distortion processing on the input signal based on a searched coefficient, and sends a power adjusting notification to said power control module when a convergence condition is met; and wherein said power control module comprises: a coefficient adjuster configured to produce an initial value of the power adjusting coefficient that is larger than 0 and smaller than 1 when said power amplification device is turned on, and to adjust said power adjusting coefficient each time when receiving the power adjusting notification until said power adjusting coefficient is adjusted to 1; and a multiplier configured to multiply the received signal by said power adjusting coefficient.