Convergence Analysis for Linear Turbo Equalization

Absfracl-In this paper, we propose a method for analysis of linear turbo equalization that makes use of extrinsic information transfer (EXIT) charts. Given channel knowledge and a timeinvariant set oi linear equalizer coefficients, evolution of soft information in the soft-input soft-output (SISO) equalizer can be estimated via analytically measuring the mutual inionnation between the transmitted symbols and their estimated a priori values at the two end points of an EXIT chart Using lhis estimated equalizer EXIT chart and an empirically generated decoder EXIT chart, convergence analysis can he undertaken. In comparison with existing EXIT chart based methods, the proposed approach can significantly reduce the reliance on extensive computer simulation. Fie. 1.. A lypical W s m i t mcdel.