A suboptimal detection scheme for MIMO systems with nonbinary constellations

For multiple-input multiple-output (MIMO) spatial multiplexing systems the complexity of the maximum likelihood detector (MLD) can be prohibitively extensive when the number of transmitting antennas and constellation points is high. To simplify the MLD many linear and nonlinear techniques have been proposed. In this paper the principle of reduced state sequence detection, based on mapping by set partitioning, is applied to perform detection in MIMO systems. Simulation results are presented for the proposed suboptimal detection algorithm.