ARRANGEMENT FOR EQUALIZING AND DEMODULATING BINARY CONTINUOUS-PHASE ANGLE-MODULATED DATA SIGNALS WITH A MODULATION INDEX 0.5.

摘要

PHD 88137 28.06.1989 "Arrangement for equalizing and demodulating binary continuous-phase angle-modulated data signals with a modulation index 0.5." An arrangement for equalizing and demodulating binary continuous-phase angle-modulated data signals (CPM-signals) with a modulation index 0.5 comprises a baseband converter for producing the quadrature components of a received CPM-signal in the baseband and an equalizer/detector. A preprocessing unit is inserted between the baseband converter and the equalizer/detector for performing a signal processing which corresponds to a phase rotation, progressing in discrete steps of 90.degree. per bit interval of the binary data signal contained in the CPM-signal, of the CPM-signal in the baseband represented by the quadrature components. The introduction of this preprocessing unit which can be realized with low cost and design effort renders it possible to use a comparatively simple conventional equalizer/detector for binary pulse amplitude modulated signals (PAMsignals) for equalizing and detecting binary CPM-signals received in distorted form.