I am simulating a SFBC OFDM system in MATLAB for 4 transmit antennas and one receive antenna system (G4 code with rate 1/2) using 16 QAM as baseband modulation technique.

The code works well for equal energy modulation schemes like MPSK but is not able to calculate accurate bit error rate performance for unequal energy modulation like MQAM.

please suggest what changes I have to do in the program to run it for 16 QAM modulation too.

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