Simultaneous estimation of 2-DOF wrist movements based on constrained non-negative matrix factorization and Hadamard product

Decoding hand/wrist movements of multiple degrees of freedom (multi-DOF) plays a significant role in the simultaneous and proportional control of dexterous prostheses. In this paper, we propose a new algorithm, CNMF-HP, that integrates the constrained non-negative matrix factorization (NMF) and Hadamard product, for estimating 2-DOF wrist movements (DOF-1, flexion/extension; DOF-2, adduction/abduction) from myoelectric signals. We suppose that,...