mapQAM = {
    16: {
        0:  (1.4142, 135.0000),
        1:  (1.1180, 116.5650),
        2:  (1.4142,  45.0000),
        3:  (1.1180,  63.4350),
        4:  (1.4142, 225.0000),
        5:  (1.1180, 243.4350),
        6:  (1.4142, 315.0000),
        7:  (1.1180, 296.5650),
        8:  (1.1180, 153.4350),
        9:  (0.7071, 135.0000),
        10: (1.1180,  26.5650),
        11: (0.7071,  45.0000),
        12: (1.1180, 206.5650),
        13: (0.7071, 225.0000),
        14: (1.1180, 333.4350),
        15: (0.7071, 315.0000),
    },

    8: {
        0: (0.5,   0),
        1: (0.5,  90),
        2: (0.5, 180),
        3: (0.5, 270),
        4: (1.0,   0),
        5: (1.0,  90),
        6: (1.0, 180),
        7: (1.0, 270),
    },

    4: {
        0: (1,   0),
        1: (1,  90),
        2: (1, 180),
        3: (1, 270),
    }
}