| Paper: | SPCOM-L4.5 | ||
| Session: | (Semi)blind Techniques I | ||
| Time: | Thursday, May 20, 14:20 - 14:40 | ||
| Presentation: | Lecture | ||
| Topic: | Signal Processing for Communications: Detection, Estimation, and Demodulation | ||
| Title: | ON REGULARITY AND IDENTIFIABILITY OF BLIND SOURCE SEPARATION UNDER CONSTANT-MODULUS CONSTRAINTS | ||
| Authors: | Yingwei Yao; University of Minnesota | ||
| Georgios B. Giannakis; University of Minnesota | |||
| Abstract: | We investigate the information regularity and identifiability of the blind source separation problem with constant modulus constraints on the sources. We prove that the information regularity (existence of a finite Cramer-Rao bound) is equivalent to local identifiability. Sufficient and necessary conditions for local identifiability are derived. We also study the conditions under which unique (global) identifiability is guaranteed within the inherently unresolvable ambiguities on phase rotation and source permutation. Both sufficient and necessary conditions are obtained. | ||
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