The data are non-linearly quantized according to a non-linear function.

A best-fit linear or non-linear equation may be used

There are provided a non-linear circuit, a non-linear amplification method, and a radio communication device using the non-linear circuit operating as follows.

A semiconductor emulation of a vacuum tube with one or more of the following characteristics: non-linear output, non-linear transfer, non-linear input, reverse transfer, and second harmonic generation.

The non-linear element is a diode and is preferably a variable non-linear element.

Each linear block is linked to at least one non-linear block.

The compensation signal may have a linear or non-linear slope.

The distortion may be linear or nonlinear, and the samples may be either ideal or non-ideal.

Described are nonlinear filter processors having an array of polynomial nonlinear filters including a first polynomial nonlinear filter and a last polynomial nonlinear filter.

The variable calibration function may be discreet or continuous and linear or non-linear.

For this purpose, in one aspect of this invention, a nonlinear optical device including a first nonlinear optical grating is presented.

The nonlinear correntropy filter can be configured as a nonlinear Wiener filter.

The nonlinear response of the nonlinear system is measured in response to the at least one stimulus.

A non-linear output can be obtained by using one or a combination of non-linear processes.

A digital communications transmitter (100) includes a digital linear-and-nonlinear predistortion section (200, 1800, 2800) to compensate for linear and nonlinear distortion introduced by transmitter-analog components (120).