| 摘要 |
A digital predistorter comprises a module J for producing a counteracting signal Vml for combination with the input signal of a power amplifier to correct the output of the amplifier for distorting memory effects within the amplifier. The module J produces the contracting signal Vml by convolving (see Figure 6) functions of the input signal with impulse response characteristics related to the memory effects being corrected. The counteracting signal Vml is produced by a function fm and parameters in that function are adjusted to minimise any residual distortion in the amplifier output. |
