Figure 5From: Design of Uniformly Most Powerful Alphabets for HDF 2-Way Relaying Employing Non-Linear Frequency ModulationsParametric minimal distance of uniformly most powerful (UMP) complex-orthonormal QFSK κ = 1 (a) and UMP-QFSK with optimized κ= 5 ∕ 6 (b). QFSK κ=1∕2 (c) demonstrates that real-orthogonality does not suffice for UMP property, however its minimal distance is not so poor as in case of QPSK.Back to article page