Figure 13: Noisy channel identification in a SISO [Filter]-[Ideal IAF] circuit using multiple I/O pairs. (a) Input signals are bandlimited to 25 Hz. The order of the space . (b) Biased output of the filter in response to the stimulus . (c) Thresholds are random with . (d) The neuron produced a total of spikes in response to 2 stimuli. (e) The optimal estimate (red) is shown together with the original filter (dashed black) and its projection (blue). Note that the MSE between and is −31.8 dB. (f)–(h) Fourier amplitude spectra of , and . As before, = but . In other words, but .