High Throughput Performance of PE-SDM in MIMO Single-Carrier Systems with MMSE-FDE

In a frequency-selective MIMO channel, the optimum beam- forming is achieved by using eigenvectors, i.e., eigenbeam- space division multiplexing (E-SDM), in the frequency domain. However, the calculation load of eigenvalue decomposition increases in proportion to the number of FFT points. In addition, eigenvectors without consideration of frequency continuity increase the delay spread of the effective channel observed at the receiver. Addressing these issues, we have proposed a pseudo eigenvector scheme for the purpose of mitigating the calculation load and maintaining frequency continuity (or decreasing the delay spread). In this paper, we present the PE-SDM performance in a MIMO single-carrier system with MMSE-FDE. The simulation results show that PE-SDM single-carrier transmission provides almost the same or better throughput performance with less complexity in comparison to E-SDM.