Low-complexity nonlinear filters

A configurable filter comprising:

• an interface configured to receive an input signal that includes an input variable;
• a nonlinear filter coupled to the interface, configured to process the input signal;
• and
• a processor coupled to the nonlinear filter, configured to determine the relative location of the input variable within a range of possible inputs and to determine a filter coefficient of the nonlinear filter using the relative location of the input variable.

A computer program product for processing an input signal that includes an input variable, the computer program product being embodied in a computer readable medium and comprising computer instructions for:

• comparing the input variable to a set of ordered constants;
• determining the relative location of the input variable within a range of possible inputs;
• and
• determining, using a processor, a filter coefficient of a nonlinear filter using the relative location of the input variable.