Parallel-cascade adaptive volterra filters

Adaptive truncated Volterra filters using parallel-cascade structures are discussed in this paper. Parallel-cascade realizations implement higher-order Volterra systems as a parallel and multiplicative combination of lower-order Volterra systems. A normalized LMS adaptive filter for parallel-cascade structures is developed and its performance is evaluated through simulation experiments. The experimental results indicate that the normalized LMS parallel-cascade Volterra filter has superior convergence over several competing structures.