Feedback Overhead in the FDD Downlink Massive MIMO System

Algorithm 1

AC feedback overhead encoding.

1: Input: : sequence to compress; : the symbol probabilities are known .

2: Output Val: a real value in the range which represents the sequence.

3: (Cum= cumulative probability and coincides with the various terminals: );

4: fordo

5:      being the number of the symbol alphabet (the number of intervals).

6:                          the lower bound

7:                         the upper bound

8: fordo

9:  

10:  

11:  

12: return   Val is the code word but any value from [low and high) is good.