Extended jointly Gaussian approach for MIMO multipath channels

In this paper, an extension of the jointly Gaussian approach (JGA) to detect signals transmitted over a multiple-input multiple-output (MIMO) multipath channel is presented. This method, dubbed extended JGA, enhances the performance of the JGA by performing a marginalization over some interfering terms before applying the jointly Gaussian assumption to remove the residual interference. Hence, it can improve the performance of a communication system at the expense of a controllable increase in the computational complexity. The signal-to-noise-plus-interference ratio (SINR) at the detector´s output is analyzed to indicate how much the extended JGA method can enhance the system´s performance. Bit error rate (BER) curves are used to corroborate the gain in performance pointed by the SINR analysis for realistic MIMO scenarios.