For a rate 3/4 OSTBC with four transmit antennas, use 16-PSK and 16-QAM constellations to transmit 3 bits/(s Hz). Use Monte Carlo simulations to derive the bit error rate (BER) versus the received SNR simulation results. Draw the curves for one receive antenna in the same figure and compare the results. Justify the achieved results. What is the effect of index assignment in the results?