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Enabling and Enhancing Massive Multiple Input-Multiple Output Systems with Two-Dimensional Orthogonal Pattern

Ruimai Wang1, Jianguo Yao1, Yanling Shi1

  • 1School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.

Sensors (Basel, Switzerland)
|June 12, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a two-dimensional orthogonal pattern division multiple access (OPDMA) technique to simplify massive MIMO systems. OPDMA effectively suppresses interference and reduces bit error rates, enhancing communication quality with a low-complexity design.

Keywords:
Doppler effectmassive MIMOmultipath interferenceoptimal frequency hopping patternsorthogonal pattern division multiple access

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Area of Science:

  • Wireless communication
  • Signal processing
  • Information theory

Background:

  • Massive MIMO systems face challenges like complex channel estimation and interference.
  • Existing methods struggle with multipath interference and Doppler effects.
  • Pilot contamination is a significant issue in current massive MIMO architectures.

Purpose of the Study:

  • To propose a novel two-dimensional orthogonal pattern division multiple access (OPDMA) technique.
  • To address key challenges in massive MIMO systems, including interference and channel estimation complexity.
  • To simplify receiver design and mitigate pilot contamination.

Main Methods:

  • Developed a two-dimensional orthogonal pattern division multiple access (OPDMA) technique.
  • Utilized optimal frequency hopping patterns with ideal autocorrelation and cross-correlation properties.
  • Employed a two-dimensional cyclic shift method based on algebraic Costas arrays for pattern construction.

Main Results:

  • OPDMA eliminates the need for equalizers and channel estimation.
  • Significant reduction in bit error rate (BER) was observed.
  • System architecture simplification and enhanced communication quality were demonstrated.

Conclusions:

  • OPDMA offers a promising low-complexity interference-suppression strategy for massive MIMO.
  • The technique streamlines system design and improves overall performance.
  • Effective when frequency hopping pattern parameters align with Doppler shift and multipath delay.