Inventors:
Joseph E. Galins - Manhattan Beach CA, US
Assignee:
Northrop Grumman Corp. - Los Angeles CA
International Classification:
H04L 27/36
Abstract:
A communications system () which utilizes an M-ary QAM signal constellation suitable for non-linear applications. The communications system includes a modulator () for utilizing the M-ary constellation to implement the modulation. The M-ary constellation is a circular constellation which provides a simplified amplitude predistortion by utilizing the subject M-ary constellations, enabling more efficient communications can then be achieved through a peak-power-limited non-linear channel (). Such non-linear channels () are more power efficient at creating RF energy from DC energy.