Q1: Given the STBC (space time block code transmitter matrix:

Part 1: Find the rate of this code?

Part 2: Is this an orthogonal code?

Part 3: Derive the decision metrics for the maximum likelihood decoding of this code.

(space time coding, space time block codes)

please solve all part and show the steps.

x 0 0 0 0 X3 0 X4 0 -X2 xi 0 0 ** Xz 0 - x x 0 0 0 0 -X 0 -X2 0 0 X4 0 0 -X; 0 0 0 0 0 x; X2 -X2 -X, -X3 0 0 -X3 0 0 0 0 x 0 x x2 - x x 0 0