Non-linear distortion reduction for a loudspeaker based on recursive source equalization

Digital Predistortion for MIMO Transmitters Using Multi-Channel Error Feedback Adaptation

“…For such a system, the convergence of the iteration (11) with α = 1 is specifically analyzed in [24]. According to experiences from observations in [24] as well as in [27]- [29], when setting convergence rate α = 1, the iteration (11) will converge rapidly (usually 2 to 7 iterations). Therefore, to ensure the iteration converges to the predistorted signals, the number of iterations, represented by a symbol I, is set to cover the commonly-used empirical values (e.g., I = 10).…”

Loudspeaker virtualization–Part I: Digital modeling and implementation of the nonlinear transducer equivalent circuit

“…Building models of loudspeakers that are simultaneously accurate and efficient is a challenging task. Such models are useful both for transducer design purposes, and for the development of loudspeaker equalization, linearization or virtualization algorithms based on digital signal processing [3,4,5,6,7,8,9,10,11,12,13]. Particularly with the latter class of algorithms, the simulation processing is expected to be so efficient as to be suitable for on-the-fly operation.…”