Fast stabilized adaptive algorithm with parallel block structure for a single sinusoidal detection

This paper proposes a new implementation of adaptive noise canceller with parallel block structure, aiming to raise the processing and convergence rates and to stabilize the characteristics after the convergence. The procedure is as follows First, an IIR bandpass filter with a variable center angular frequency using adaptive Q-factor control and two adaptive control signal generators are realized by the parallel block structure. Secondly, a new algorithm for adaptive Q-factor control with parallel block structure is proposed to improve the convergence characteristics. In addition, the characteristics after the convergence of the filter is stabilized by using the normalized gradient algorithm for the adaptive control of the center frequency. Finally, simulation results are given to demonstrate the convergence performance.