Systems (400, 500, 600) and methods (300) for generating a chaotic amplitude modulated signal absent of cyclostationary features by preserving a constant variance. The methods involve: generating a PAM signal including pulse amplitude modulation having a periodically changing amplitude; generating a...http://www.google.com/patents/US8068571?utm_source=gb-gplus-sharePatent US8068571 - Featureless coherent chaotic amplitude modulation
