Switching Mechanism on the Order of Affine Projection Algorithm

Conventional affine projection (AP) algorithm with a fixed order is subject to tradeoff between convergence speed and steady-state misalignment. In address such problem, switching mechanism on the of AP proposed by comparing performance two algorithms different orders. Firstly, mean square deviations (MSD) behavior analyzed, calculation formula for computing MSD at each iteration derived. Secondly, we design select better MSDs them; chosen smaller than that other. We also give theoretical analysis, including error (MSE) computational complexity. Finally, experiments in system identification echo-cancellation scenarios demonstrate has good not only stationary environment but non-stationary environment.