Abstract :
An IIR adaptive line enhancer (ALE), previously proposed by David, Stearns, Elliott and Etter (1983) is explored further. We propose a mechanism for controlling the bandwidth of the ALE, in an adaptive manner. The proposed mechanism increases the bandwidth of the ALE whenever its peak is not close to a spectral line of the input signal, to assure its fast convergence, and decreases the bandwidth of the ALE when its peak matches a spectral line of the input signal, to enhance that spectral line further. Also, a new algorithm for robust adaptation of the ALE is proposed
Keywords :
IIR filters; adaptive equalisers; adaptive filters; adaptive signal processing; convergence of numerical methods; filtering theory; spectral analysis; IIR adaptive line enhancer; algorithm; controlled bandwidth; fast convergence; input signal; robust adaptation; spectral line; Adaptive control; Bandwidth; Equations; Finite impulse response filter; Frequency; IIR filters; Line enhancers; Programmable control; Signal to noise ratio; White noise;
