Title :
Bounds for the mixing parameter within the CC-CMA algorithm applied in non ideal multiuser environments
Author :
Luo, J. ; Chambers, J.A.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
We derive new bounds for the mixing parameter, γ, within the cross-correlation constant modulus algorithm (CC-CMA) for blind source separation and equalization in non-ideal multiuser environments. Channel undermodelling and noise are considered when the complex sources are circularly symmetric. These tighter bounds are obtained by surface topography of the error performance surface of the CC-CMA algorithm, and replace earlier work which suggested that γ>4/3. The validity of the bounds is confirmed by simulation studies
Keywords :
blind equalisers; correlation methods; multiuser channels; parameter estimation; signal detection; CC-CMA; blind source separation; channel noise; channel undermodelling; circularly symmetric sources; complex sources; cross-correlation constant modulus algirithm; equalization; error performance surface; mixing parameter bounds; non-ideal multiuser environments; surface topography; Biomedical signal processing; Blind equalizers; Blind source separation; Convergence; Cost function; Educational institutions; Intersymbol interference; Linear antenna arrays; Signal processing algorithms; Surface topography;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.940425
