Society of African Journal Editors

Nigerian Journal of Technological Development

A Fractional Variable Partial Update Least Mean Square Algorithm (FVPULMS) for communication channel estimation

Authors: S.A. Akinboro, A Omotosho, E.A. Oluwatosin

Journal: Nigerian Journal of Technological Development

The study presents a study on communication channel estimation algorithms. Fractional Variable Partial Update Least Mean Square algorithm (FVPULMS) is proposed. The model consists of input signal, unknown channel, an adaptive filter and an adaptation algorithm. The adaptive filter is a finite impulse response transversal adaptive filter. The adaptation algorithm is a FVPULMS algorithm and the filter update uses coefficient with index factors of three and five. The proposed algorithm was compared with Variable Partial Update Least Mean Square (VPULMS) and Full Update Least Mean Square (FULMS) algorithms. The simulation was carried out using fixed step sizes and variable step sizes of (< and >). The result showed that FVPULMS algorithm has enhanced average performance efficiency in terms of estimated signal error reduction at the receiver station compared with VPULMS and FULMS algorithms, and can help to achieve improved signal error at the receiver station. Keywords: Adaptation, Channel, step size, convergence speed, computational complexity, error state