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Figure 4 | EURASIP Journal on Advances in Signal Processing

Figure 4

From: Multi-task hidden Markov modeling of spectrogram feature from radar high-resolution range profiles

Figure 4

Graphical representation of the MTL TSB-HMM, the detailed generative process is described in (7). (a) Graph of the MTL TSB-HMM, the detailed generative process is described in (6). Here, W ( c , m ) = [ w 0 ( c , m ) T ; w 1 ( c , m ) T ; … ; w I ( c , m ) T ] , i is the state index, c is the target index, l is the range cell index, y(c, m, n)(l) is l th time chunk of n th sample's spectrogram in the m th aspect-frame of the c th target. For the symbol I, Mc, N, and L y of a box indicate that there is a stack of such box for the index i, m, n, and l, where I denotes the truncation number of states, M c denotes the number of aspect-frames of target c, N denotes the number of samples in an aspect frame, and L y denotes the number of time bins in spectrogram feature. (b) The spatial dependence across time cell of spectrogram feature for a given aspect frame.

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