Number of feedback bits in different scenarios for two-hop MIMO system

The multiuser MIMO relay broadcast system is studied in this paper. For the mentioned system we have considered the estimation errors as well as quantization errors in the backhaul channel. The maximum loss of rate that system can withstand is given. Then the number of feedback bits for both the blocks are calculated such that the rate loss is not greater than the upper bounded rate loss. Moreover feedback bits are calculated for different scenarios which are then compared and plotted. The relationship between the number of feedback bits, transmitted power and the number of users is shown.