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Error performance analysis of generalized quadrature spatial modulation with labelling diversity.

Nathael Sibanda1, Hongjun Xu2, Narushan Pillay2

  • 1School of Engineering, University of KwaZulu Natal, Durban, 4001, South Africa. nathael.sibanda@gmail.com.

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Summary

This study introduces two new schemes, MAA-GSM-LD and GCQSM-LD, to significantly improve error performance in MIMO-GSM systems. These advanced techniques enhance data transmission reliability for better wireless communication.

Keywords:
Error performanceGeneralised quadrature spatial modulationLabelling-diversityMultiple-input multiple-output

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Area of Science:

  • Wireless Communication Engineering
  • Signal Processing
  • Information Theory

Background:

  • Multiple-Input Multiple-Output (MIMO) systems are crucial for high-speed wireless communication.
  • Generalised Spatial Modulation (GSM) enhances data rates and error performance in MIMO systems.
  • Existing MIMO-GSM schemes face limitations in optimizing error performance.

Purpose of the Study:

  • To propose novel schemes for enhancing error performance (EP) in MIMO-GSM systems.
  • To introduce Multiple Active Antenna Generalised Spatial Modulation with Labelling Diversity (MAA-GSM-LD) and Generalised Complex Quadrature Spatial Modulation with Labelling Diversity (GCQSM-LD).
  • To analytically evaluate and validate the performance of these new schemes.

Main Methods:

  • Developed MAA-GSM-LD integrating multiple active antennas and optimized labeling maps with maximized minimum product distance (M-MPD).
  • Developed GCQSM-LD building on MAA-GSM-LD by utilizing quadrature and in-phase dimensions for improved synchronization and EP.
  • Derived analytical expressions for union-bound and upper-bound average bit error rate (ABER) and validated using Monte Carlo simulations over Rayleigh fading channels.

Main Results:

  • Both MAA-GSM-LD and GCQSM-LD demonstrate superior error performance compared to existing MIMO-SM schemes at similar spectral efficiencies.
  • MAA-GSM-LD shows a 1.0 dB EP improvement over GQSM and 4.3 dB over Golden codeword-GSM-C-64QAM at 11 bits/s/Hz.
  • GCQSM-LD achieves a 4.7 dB EP improvement over GCQSM-C-64-QAM and 3.7 dB over GQSM-AG-C-32QAM at 14 bits/s/Hz.
  • Analytical results closely match simulation outcomes, confirming the accuracy of the derived expressions.

Conclusions:

  • The proposed MAA-GSM-LD and GCQSM-LD schemes offer significant enhancements in error performance for MIMO-GSM systems.
  • These schemes provide a viable strategy for achieving higher data rates and improved reliability in wireless communications.
  • The integration of optimized labeling diversity and advanced modulation techniques is effective in boosting system performance.