Patent Number: 6,674,326

Title: Digitally controllable nonlinear pre-equalizer

Abstract: A digitally controllable nonlinear pre-equalizer system receiving an inputsignal and generating an output signal, the system including a splitterfor dividing the input signal into a first signal path and a second signalpath, an attenuator and a time delay element in the first signal path, theattenuator and the time delay element operable to generate a linearsignal, a mixer and a vector modulator in the second signal path, themixer being responsive to a signal from a digital to analog convertercoupled to a processor chip providing a digital signal to the digital toanalog converter, the mixer and vector modulator operable to generate anonlinear signal, and a summer for summing the linear signal and thenonlinear signal to generate the output signal.

Inventors: Hiramoto; Remy O. (Hermosa Beach, CA), Bach; Susan E. (Redondo Beach, CA), Kubasek; Suzanne E. (El Segundo, CA), Cooper; Thomas (Torrance, CA)


International Classification: H03F 3/54 (20060101); H03F 3/58 (20060101); H03F 1/32 (20060101); H03F 001/26 (); H03F 003/04 (); H04L 025/49 ()

Expiration Date: 01/02016