Transient Performance Analysis of the $\ell_1$-RLS

14 Sep 2021  ·  Wei Gao, Jie Chen, Cédric Richard, Wentao Shi, Qunfei Zhang ·

The recursive least-squares algorithm with $\ell_1$-norm regularization ($\ell_1$-RLS) exhibits excellent performance in terms of convergence rate and steady-state error in identification of sparse systems. Nevertheless few works have studied its stochastic behavior, in particular its transient performance. In this letter, we derive analytical models of the transient behavior of the $\ell_1$-RLS in the mean and mean-square sense. Simulation results illustrate the accuracy of these models.

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