SM-MIMO effect on the performance of LTE detectors in uncertain noise environments

Abstract

The effect of Spatial Multiplexing -Multiple Input Multiple Output (SM-MIMO) transmission technique on the performance of commonly used 4G-LTE detection techniques, was investigated. The channel environments used are Additive White Gaussian (AWGN), noise and heavy-tailed noise distributions as an actual noise distribution. The detectors characteristics were obtained by computer simulation for the case of un coded QPSK modulation, and open loop spatial multiplexing.Index Terms -Spatial multiplexing, MIMO, sub-optimal & optimal detectors, uncertain channel noise model.

Fair- M-Estimator Based Mimo Detector and Mimo System Investigation in Non-Gaussian Channels

“…For 2   , GG distribution coincides with the Normal distribution, while for 1   , the distribution coincides with the two sided Laplace distribution. For 2   , this distribution has heavier tails in comparison with the Normal distribution [8,9,18]. Fig.2 shows a variety of densities at different values of  .…”

“…Finally, the remaining signal with least interference can be used in the next stage. Either ZF detector in equation (3) or MMSE detector in equation 5can be used as symbols estimator in the consecutive OSIC stages [7][8][9], [18].…”