Figure 3.

Heuristic search for optimal pulse duration (τ) and pulse gap (Δt), at optimal train length N _opt = 25. Optimal cost function V values for different τ at fixed Δt = 20 ms, and different Δt at fixed τ = 20 ms are shown in (a) and (b), respectively. Spline interpolation between tested configuration is added to the graph (dashed lines), to guide the choice of τ_opt and Δt _opt. The individual contribution of each parameter to the cost function, given by the square of the theoretical CV (obtained from CRLB), is also shown for BPF (blue), ${\mathrm{T}}_2^{\mathrm{B}}$ (orange), and k _FB (green). Arrows indicate approximate location of minimal value of V as function of the inspected parameters.