Northrop Grumman Systems Corporation

Holly C Osborne

Thomas J Kolze

Christopher W Walker

Constellations () arranged in a concentric circle pattern provide simplified control of modulated communication. A plurality of concentric circles () with defined points () include convolutionally coded and uncoded bits. Constellation patterns having three or four concentric circles () are provided. A magnitude error for each of the points () allows for deviations during communication. The constellations () provide efficient communication using non-linear channels.

Constellation mapping for modulated communications

A data and clock signals from a source () are transmitted from a location () to a distant location () together with a phase signal which estimates the difference in phase between a data clock signal and a reference clock signal generated by a reference clock () at location (). At the second location (), the phase signal is used to address coefficients stored in a read only memory () which are used to condition a resample or interpolate filter () which generates resampled data signals.

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Redondo Beach, CA, United States of America

Holly C Osborne