Methods and apparatus for signal distortion correction

摘要

The digital predistorter multiplies the input signal with coefficients obtained from look-up tables. To reduce the amount of storage required, the coefficients are stored in partial form and are either reconstituted by addition of a constant ( 44 , FIG. 3 b) prior to application to the input signal or the retrieved coefficients are applied directly to the input signal and the resulting modified signal is then combined with the original input signal ( 34 , FIG. 2 a).