Patent ID: 7091779

Claim:
A method of modeling a non-linear digital signal processing system for reduction of distortion in the system, the method comprising: expressing the non-linear digital processing system as a number of processes depending on a set of determined process parameters P 1 to PN and non-linear processes designated as NLS(P 1 ,P 2 , . . . PN), which are described by multiplying blocks or a cascade of non-linear sub-processes each depending on one of the non-linear process parameters P 1 to PN, whereby each sub-process is described by a generalized Wiener or Hammerstein process comprising both a linear and a non-linear process and a description of the process or system is made by a model describing first a transfer function of a main non-linear sub-system (MNLS) depending on a process P 1 , and consecutive multiplying non-linear system processes are each described by a transfer function 1+dNLS(dPi), wherein a process dNLS(dPi) is defined as a difference sub-process to the preceding cascaded processes and a process parameter dPi is defined as equal to a difference between an actual process parameter value Pi and a mean value Pi_mean of the process value Pi used in preceding processes.