Title :
Nonlinear equalizer for controlling AM-PM conversion and AM compression
Author_Institution :
Res. Inst. for Telecommun., Budapest, Hungary
Abstract :
A nonlinear-equalizer is presented for cancelling the amplitude modulation-to-phase modulation (AM-PM) conversion and AM compression of transmission systems. The equalizer is realized by cascaded nonlinear blocks where the nonlinearities are produced by differential amplifiers. Different types of nonlinear amplifiers are used either in cascade or in feedback configuration. The proposed nonlinear equalizer provides third-order nonlinear distortion factors suitable for the equalization of the inherent AM-PM conversion and AM compression of transmission systems. An actual equalizer has been designed operating in a 50% normalized bandwidth with maximum ranges of K=3.3°/dB and c=6 dB. By controlling the equalizer input level, the AM-PM conversion and AM compression can be adjusted within these ranges
Keywords :
amplitude modulation; compensation; electric distortion; equalisers; microwave links; phase modulation; radio equipment; AM compression; AM-PM conversion; IF band; cascade; cascaded nonlinear blocks; compensation; differential amplifiers; feedback configuration; microwave radio; nonlinear amplifiers; nonlinear-equalizer; third-order nonlinear distortion factors; transmission systems; Circuits; Differential amplifiers; Equalizers; Feedback; Frequency conversion; Nonlinear distortion; Phase distortion; Power amplifiers; Power system relaying; Telecommunication control;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo
DOI :
10.1109/ISCAS.1988.15460
