The effects of fluctuation based processing on waterfall displays
Dale B. Dalrymple · The Journal of the Acoustical Society of America · 2001
Fluctuation based processing is a nonlinear method of processing time series data. Passive sonar waterfall displays are time-frequency plots where sequential data in each bin is a time series. Fluctuation based processing enhances the detection of low-fluctuation amplitude signals when processed against a background of high fluctuation noise or interferers. This paper examines the impact of fluctuation based processing on the signal processing load required for the generation of waterfall displays and examines alternatives to traditional waterfall normalization methods that apply to low-fluctuation amplitude signals.