Independent Component Analysis by Entropy Maximization (INFOMAX)
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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This thesis explores the Infomax method of Independent Component Analysis ICA to accomplish blind source separation BSS. The Infomax method separates unknown source signals from a number of signal mixtures by maximizing the entropy of a transformed set of signal mixtures and is accomplished by performing gradient ascent in MATLAB. The thesis specifically focuses on small numbers of two types of signals audio signals and simple communications signals polar non-return to zero signals. The Infomax method is found to be successful and efficient only for small numbers of signals, and improvements to the gradient ascent algorithm should be made for the Infomax algorithm to succeed for more than three signal mixtures. MATLAB implementation code is included as appendices.
- Radiofrequency Wave Propagation
- Radio Communications
- Non-Radio Communications