Understanding the PSC Variable in 3GPP TS 25.213 5.2.2

The variable a represents a sequence of 16 values: x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, x16. The values of a are given as follows: a = <1, 1, 1, 1, 1, 1, -1, -1, 1, -1, 1, -1, 1, -1, -1, 1>. \ The variable PSC represents a sequence of 16 complex values. Each value in PSC is obtained by multiplying the corresponding value in a with (1 + j), where j represents the imaginary unit. The values of PSC are given as follows: PSC = (1 + j) <a, a, a, -a, -a, a, -a, -a, a, a, a, -a, a, -a, a, a>.