Hello everybody... I am doing my thesis on feature extraction of digital modulations and I've seen quite a few papers using the 2nd and 4th cumulant as a tool.. Could anyone tell me what is the specific advantage of the 2nd and 4th cumulant in feature extraction?? I would really appreciate your help or any references you might have.. Thank you, George [EMAIL PROTECTED] ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================