Figure 4From: Design of Uniformly Most Powerful Alphabets for HDF 2-Way Relaying Employing Non-Linear Frequency ModulationsParametric minimal distance of QPSK and XOR (a) -- for some non-zero parameters we expect poor performance. QFSK with κ = 1 and XOR (b) is robust to parametrization -- is uniformly most powerful (UMP). QFSK with κ = 1 and modulo sum XC (c) is not UMP due to the poor performance for the parameter -1.Back to article page