Enhanced multi user detection technique of overloaded MIMO systems using Network Coding based HARQ

This work proposes a novel scheme for Multi User Detection (MUD), in an overloaded Multiple Input Multiple Output (MIMO) system where the number of Transmit antennas (N
_t
) is greater than the number of Receive antennas (N
_r
), using HARQ with Network Coding (NC). The primary aim of this work is to transform the overloaded systems into critically loaded (N
_t
= N
_r
) or underloaded MIMO (N
_t
<; N
_r
) systems while enhancing the performance. The performance measures are Bit Error Rate (BER) and Throughput. The proposed scheme substantially reduces the BER and packet drop rate with throughput enhancement up-to 20-25% as compared to traditional schemes proved in the end by the simulation results.