Method of moment estimation and feature extraction for devices which measure spectra as a function of range or time

In a Doppler system that transmits a train of pulses of radio frequency energy into a predefined region of multidimensional space and receives return echo signals from scatters extant in said predefined region of space in response thereto, which return echo signals include at least one feature of interest and contaminating components, apparatus for mitigating the effects of said contaminating components comprising:

• means for processing said spectral data to determine at least one mathematical quantity of said spectral data, comprising;
• means for mapping said return echo signals into Doppler velocity-range coordinated space;
• means for segmenting said Doppler velocity-range coordinate space into a plurality of sub-regions;
• means for computing at least one mathematical quantity based upon said received return echo signals for each of said plurality of sub-regions;
• means for fuzzy logic analyzing said determined at least one mathematical quantity to produce local composite data for a plurality of sub-regions;
• means for image processing said local composite data to extract said at least one feature of interest from said local composite data;
• and
• means for extracting desired measurement data from said at least one feature of interest.