Assessment of Noise Reduction Achieved by Adaptive Line Enhancement of a Noisy, Multiple Sinusoidal Input

R.L. Campbell, Jr. and N.H. Younan (USA)


Adaptive Line Enhancer, adaptive filtering, SNR gain,multiple sinusoid, sonar, general performance


This paper establishes the theoretical SNR gain of the Adaptive Line Enhancer (ALE) when applied to any noisy, multiple sinusoidal input with a noiseless fundamental frequency ff. Assessment is restricted to filter lengths L=k⋅L* , where L* = fs /ff and fs = the sampling frequency. Important simulation results and a derivation of the theoretical SNR gain are provided. Musical and sonar applications are discussed.

Important Links:

Go Back