Figure 2

Improvement in the robustness of the method. (a) Solution existence region at each phase (blue–black) when \(R_{d}\) only rotates to the right-handed circularly polarized position of the Poincaré sphere. (b) Solution existence region at each phase when the two positions are complementary. (c) Area ratio of the solution existence region at each phase when \(R_{d}\) only rotates to the right-handed circularly polarized position of the Poincaré sphere. (d) Area ratio of the solution existence region at each phase when the two positions are complementary