Adaptive decision-feedback equalization of MiMO systems using coordinate descent iterations
Date
2012
Authors
Arablouei, R.
Dogancay, K.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
2013 National Conference on Communications, NCC 2013, 2012, iss.6363638, pp.3735-3740
Statement of Responsibility
Conference Name
IEEE International Conference on Communications (ICC '12) (10 Jun 2012 - 15 Jun 2012 : Ottawa, Canada)
Abstract
A new adaptive MIMO channel equalizer is proposed based on adaptive generalized decision-feedback equalization and ordered-successive interference cancelation. The proposed equalizer comprises equal-length subequalizers, enabling any adaptive filtering algorithm to be employed for coefficient updates. A recently proposed computationally-efficient recursive least squares algorithm based on dichotomous coordinate descents is utilized to solve the normal equations associated with the adaptation of the new equalizer. Simulations show that the proposed equalizer is superior to the previously proposed adaptive MIMO channel equalizers by providing both enhanced bit error rate performance and reduced computational complexity. Furthermore, the proposed algorithm exhibits stable numerical behavior and can deliver a trade-off between performance and complexity.