dmin-based precoder applied to non-binary LDPC coded MIMO system

In this paper, we present a transmission model for a multiple-input multiple-output (MIMO) channel with perfect channel state information (CSI). We intend to exploit the available CSI through the use of a precoder based on the minimum Euclidean distance (d_min) criterion. We also introduce a low density parity check coding block in order to improve the system performance. We consider a two-stream 4QAM-MIMO transmission scheme (4 bits per transmitted symbol vector) associated to a non-binary LDPC (NB-LDPC) code over GF(2⁴). The addition of the precoder in this system is studied. Simulations are made in order to show the interest of the association of the d_min-based precoder with NB-LDPC codes, which is particularly well suited for LDPC codes with high rates.