Figure 12: Channel identification in a SISO [Filter]-[Ideal IAF] circuit using signals from the Paley-Wiener space . (a) In contrast to Figure 6, input signals , . (b) Biased output of the filter in response to the stimulus . (c) The filter output in (b) is integrated by an ideal IAF neuron. (d) The neuron generated a total of 38 spikes in response to all 5 input signals. (e) The identified impulse response of the filter (red) is shown together with the original filter (dashed black) and its projection (blue). The MSE between and is −71.1 dB. (f)–(h) Fourier amplitude spectra of , , and . In contrast to Figure 6, and do not exhibit a discrete (line) spectrum. Again, but .