Development of equation-error adaptive IIR-filter-based active noise control system

An infinite impulse response (IIR) filter benefits to identify complex primary and secondary paths information with short filter length for active noise control (ANC) system. Conventional output-error (OE)-based system uses adaptive IIR filter with the filtered-U recursive least mean square (FURLMS) algorithm to cancel undesired noise. This paper develops an ANC system using equation-error (EE)-based IIR filter and analyzes its step size bound, global minimum and computation complexity. The EE-based ANC system can also solve measurement error problem for the error sensor. Several simulations show effectiveness and enhancement of the developed EE-based system.