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This work proposes a low complexity nonlinearity model and develops adaptive algorithms over it. The model is based on the decomposableor rank-one, in tensor language Volterra kernels. It may also be described as a product of FIR filters, which explains its low-complexity. The rank-one model is also interesting because it comes from a well-posed problem in approximation theory. The paper uses such model in an estimation theory context to develop an exact gradienttype algorithm, from which adaptive algorithms such as the least mean squares (LMS) filter and its data-reuse versionthe TRUE-LMSare derived. Stability and convergence issues are addressed. The algorithms are then tested in simulations, which show its good performance when compared to other nonlinear processing algorithms in the literature.
Nonlinear Adaptive Algorithms on Rank-One Tensor Models