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. Author manuscript; available in PMC: 2018 Jun 5.
Published in final edited form as: J Neural Eng. 2012 Nov 27;9(6):065004. doi: 10.1088/1741-2560/9/6/065004

Figure 3.

Figure 3

Numerical examples of the design of space-time precoders. The neural circuit under stimulation has four simulation inputs and eight measured outputs. (a) The log of the frequency representation of the input signals after decomposition. (b) Optimal power allocation over frequency and independent channels after decomposition. (c) The space-time precoding filter coefficients from sensory signals s1(n) and s2(n) to stimulation inputs u1(n) and u2(n). (d) The Effects of precoding on the spread of the evoked spatiotemporal patterns projected along the first and the second principal components. (e) The statistics of the Euclidean distance between the nearest neighbors. The distance between nearest neighbors are 204 ± 56 for the optimal precoder, 192 ± 37 for the suboptimal precoder, and 176 ± 34 for the identity precoder. (f) The distribution of power along the eigenvalues of the system output.