METHOD AND APPARATUS FOR PERFORMING PREDISTORTION

摘要

Embodiments are described herein to provide better predistortion solutions for the linearization of high power amplifiers, especially those with memory effects. Many embodiments involve a method in which a predistorted signal zn is generated from input signal xn in accordance with z n =  ∑ k = 1 K  ∏ q = 1 Q  P kq  ( x n - q - 1 ) =  P 11  ( x n )  P 12  ( x n - 1 )   …   P 1  Q  ( x n - Q - 1 ) +  P 21  ( x n )  P 22  ( x n - 1 )   …   P 2  Q  ( x n - Q - 1 ) + … +  P K   1  ( x n )  P K   2  ( x n - 1 )   …   P KQ  ( x n - Q - 1 ) for K terms and Q−1 delays, wherein each Pkq is a complex valued function of a single complex variable. Also described are predistorter apparatus embodiments in which a predistorter includes complex multipliers for multiplying the value of each Pkq having the same value of k to produce K products and at least one adder for adding the K products to generate predistorted signal zn from input signal xn in accordance with the equation above.