Title :
Identification of nonlinear MIMO radio over fiber uplink channels
Author :
Fernandes, Carlos A R ; Kibangou, Alain ; Favier, Gérard ; Mota, João C M
Author_Institution :
Fed. Univ. of Ceara, Fortaleza
Abstract :
This paper proposes two new methods for identifying multiple-input-multiple-output (MIMO) nonlinear systems. Specifically, we are interested in radio over fiber (ROF) uplink communications channels. The electrical optical (E/O) conversion in such systems introduces relevant nonlinear distortion and, consequently, the overall channel can be viewed as a convolutive post nonlinear (CPNL) mixture. The proposed techniques for system identification exploit the use of orthonormal basis functions to accelerate the convergence of the least mean square (LMS) algorithm and to decouple the minimum mean squared error (MMSE) estimation in a block-processing scheme.
Keywords :
MIMO communication; convergence of numerical methods; distortion; mean square error methods; radio-over-fibre; wireless channels; MIMO; block processing scheme; convergence; convolutive post nonlinear mixture; electrical optical conversion; least mean square algorithm; minimum mean squared error estimation; multiple-input multiple-output nonlinear system; nonlinear distortion; orthonormal basis function; radio over fiber uplink communication channel; Acceleration; Communication channels; Fiber nonlinear optics; MIMO; Nonlinear distortion; Nonlinear optics; Nonlinear systems; Optical distortion; Optical fiber communication; System identification; MIMO; Nonlinear systems; Orthonormal Basis Functions; Radio Over Fiber;
Conference_Titel :
Telecommunications Symposium, 2006 International
Conference_Location :
Fortaleza, Ceara
Print_ISBN :
978-85-89748-04-9
Electronic_ISBN :
978-85-89748-04-9
DOI :
10.1109/ITS.2006.4433272