Fig. 8.

Error landscapes for the digital system noise model using (a) the optimized iterative method; (b) the $500\times 500$ point LUT; and (c) the $2000\times 2000$ point LUT at 100 MHz. In the plots, the effect of ${\mu }_a$ can be observed as an increasing amount of error [labeled $d$ as defined in Eq. (1)] moving from left to right in each figure. The HD-LUT shows lower error than the LUT and is comparable to the iterative method. These error landscapes plotted as percent error for ${\mu }_a$ and ${\mu }_s^{\prime }$ separately are shown in Fig. S2 in the Supplemental Material.