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Performance Analysis and Constellation Design for the Parallel Quadrature Spatial Modulation.

Manar Mohaisen1, Tasnim Holoubi2, Tamer Abuhmed3

  • 1Department of Computer Science, Northeastern Illinois University, Chicago, IL 60625, USA.

Entropy (Basel, Switzerland)
|December 8, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces parallel spatial modulation (PQSM), a technique enhancing spectral efficiency in wireless communications. Optimized constellations for PQSM significantly outperform phase-shift keying and quadrature-amplitude modulation, offering substantial performance gains.

Keywords:
constellation designpairwise error probabilityparallel QSM (PQSM)quadrature SM (QSM)spatial modulation (SM)

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Area of Science:

  • Wireless Communications
  • Signal Processing
  • Information Theory

Background:

  • Spatial Modulation (SM) is a MIMO technique transmitting data via antenna indices.
  • Quadrature SM (QSM) utilizes in-phase and quadrature dimensions for signal transmission.
  • Parallel QSM (PQSM) enhances spectral efficiency by grouping antennas for independent QSM.

Purpose of the Study:

  • To analytically model the asymptotic pairwise error probability of PQSM.
  • To formulate constellation design for PQSM as an optimization problem.
  • To propose optimal constellations for PQSM under various system parameters.

Main Methods:

  • Analytical modeling of asymptotic pairwise error probability for PQSM.
  • Formulation of constellation design as a sum of multivariate functions optimization problem.
  • Development and simulation of novel PQSM constellations.

Main Results:

  • The proposed PQSM constellations were developed for different system configurations.
  • Simulations demonstrate PQSM constellations outperform PSK by over 10 dB.
  • PQSM shows approximately 5 dB gain over QAM for large constellations and antenna numbers.

Conclusions:

  • The developed analytical model provides a framework for PQSM constellation design.
  • Optimized PQSM constellations offer significant performance improvements over existing schemes.
  • PQSM represents a promising technique for future high-spectral-efficiency wireless systems.