Table 2.

Table summarizing the back-scattered signal parameters that contributed to LDA.

Type	Group	Number	Feature/Parameter
Time Domain	Time Domain Statistics	1	Mean (M)
		2	Standard Deviation (SD)
		3	Skewness (Skew)
		4	Kurtosis (Kurt)
		5	Interquartile Range (IQR)
		6	Entropy (E)
	Time Domain Histogram	7	${\mu }_{Nakagami}$
Frequency Domain	Discrete Cosine Transform (DCT)	8 … 27	1st … 20th Coefficient ($E_{DCT}\left[l^1\right]$ … $E_{DCT}\left[l^{20}\right]$)
		28	Number of coefficients that capture 98% of the original signal ($N_{DCT}$)
		29	Total spectrum Area Under Curve (AUC) ($AU{C}_{DCT}$)
		30	Maximum peak amplitude ($Pea{k}_{DCT}$)
		31	Total spectral power ($P_{DCT}$)
	Wavelet Packet Decomposition	32 … 37	Haar Relative Power 1st … 6th level ($E_{Haar}^1$ … $E_{Haar}^6$)
		38 … 43	Db10 Relative Power 1st … 6th level ($E_{Db10}^1$ … $E_{Db10}^6$)