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Related Experiment Video

Updated: Aug 19, 2025

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Error performance analysis of generalized quadrature spatial modulation using H-8QAM.

Nathael Sibanda¹, Hongjun Xu², Narushan Pillay²

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

Scientific Reports

|November 30, 2022

Summary

This study introduces a new Generalised Quadrature Spatial Modulation using Hexagonal 8-Quadrature Amplitude Modulation (GQSM-H-8QAM) scheme. The novel GQSM-H-8QAM significantly improves error performance in wireless communication systems.

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Area of Science:

Electrical Engineering
Wireless Communications
Signal Processing

Background:

Generalised Complex Quadrature Spatial Modulation (GCQSM) systems face challenges in error performance.
Conventional Quadrature Amplitude Modulation (QAM) systems have limitations in Euclidean distance and peak-to-average power ratio.
Spatial Modulation (SM) techniques are crucial for enhancing wireless communication efficiency.

Purpose of the Study:

To enhance the error performance (EP) of GCQSM systems.
To introduce a novel scheme named Generalised QSM using H-8QAM (GQSM-H-8QAM).
To analyze the theoretical Average Bit Error Probability (ABEP) and validate it through simulations.

Main Methods:

Utilizing hexagonal 8-Quadrature Amplitude Modulation (H-8QAM) constellations within the GCQSM framework.
Developing a theoretical ABEP expression for the proposed GQSM-H-8QAM scheme.
Conducting Monte Carlo simulations to validate the theoretical model and compare performance.

Main Results:

The proposed GQSM-H-8QAM scheme demonstrates improved EP over existing GCQSM, C-QSM, and C-GSM schemes.
The theoretical ABEP expression is validated and shows increasing tightness at high signal-to-noise ratios.
Significant EP gains were observed, e.g., 4.85 dB over C-GSM-C-64QAM at 8 bits/s/Hz spectral efficiency.

Conclusions:

The GQSM-H-8QAM scheme offers a substantial enhancement in error performance for wireless communication systems.
Hexagonal QAM constellations provide advantages over conventional QAM in GCQSM applications.
The study validates the effectiveness of the proposed scheme through theoretical analysis and simulations.