Wireless Personal Communications

, Volume 110, Issue 2, pp 999–1020 | Cite as

Modified Spatial Modulation and Low Complexity Signal Vector Based Minimum Mean Square Error Detection for MIMO Systems under Spatially Correlated Channels

  • Gaurav Jaiswal
  • Vishnu Vardhan Gudla
  • Vinoth Babu Kumaravelu
  • G. Ramachandra Reddy
  • Arthi MurugadassEmail author


Spatial Modulation (SM) is an innovative digital modulation scheme, which is expected to be a competitive candidate for next generation networks. All the variants of SM exhibit poor performance under spatial correlation and line of sight (LOS) Rician channel conditions. To combat the adverse effects of spatial correlation, a new variant of SM designated as modified spatial modulation (MSM) is proposed for 8 × 8 multiple input multiple output configuration. MSM uses a unique and dynamic mapping, which activates either one antenna or two antennas at the transmitter. Optimum maximum likelihood (ML) detection at the receiver though give accurate results but leads to high computational complexity as it performs extensive search of all possible antennas and symbols. In order to reduce the computational complexity, signal vector based minimum mean square error (SVMMSE) detection scheme is employed for MSM scheme. Estimation of antenna indices and transmitted symbols is done for both single antenna active and double antenna active scenarios. Performance of SVMMSE detection scheme is also analyzed under spatial correlation and LOS Rician channel conditions. The promising performance of SVMMSE under spatially uncorrelated Rayleigh, Spatial correlation and LOS Rician channel conditions with low computational complexity justifies the suitability of the proposed scheme for 5G based compact battery driven wireless devices.


Modified spatial modulation (MSM) Multiple input multiple output (MIMO) Optimum maximum likelihood (ML) detection Signal vector based minimum mean square error detection (SVMMSE) Spatial modulation (SM) Spatial correlation 



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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.SOC/Hardware System Performance Engineer I, Qualcomm India Pvt. Ltd.ChennaiIndia
  2. 2.Department of Communication Engineering, School of Electronics EngineeringVellore Institute of TechnologyVelloreIndia
  3. 3.Department of Computer Science and EngineeringSreenivasa Institute of Technology and Management StudiesChittoorIndia

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