A Blind Detection Method for Spatial Modulation in MIMO Communications

Mahmoud naeiny | Roya Khanzade

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=148002
Date :  2021/01/01
Publish in :    IET Communication


Keywords :ُSpatial Modulation, Expectation Maximization (EM), Blind detection

Abstract :

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Spatial Modulation (SM) is one of the probable candidates to be utilized in the 5th generation of wireless networks due to its power and spectral efficiencies. Since only one active Transmit Antenna (TA) exists in SM, inter-channel interferences are avoided and the number of RF chains is reduced. However, channel estimation is a major challenge in SM communication systems. In this study, a novel blind signal and channel estimation method for SM-based Multi-Input Multi-Output (MIMO) communications, based on the well-known Expectation-Maximization (EM) algorithm, is presented. This blind detector requires only a few pilot symbols at the beginning of the transmission to resolve the inherent phase and permutation ambiguities. Simulation results demonstrate that the proposed detector performs very similar to the optimum detector with full Channel State Information (CSI) and outperforms existing blind detectors.