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Multi-Access Channel Based on Quantum Detection in Wireless Optical Communication.

Wenbin Yu1,2,3,4, Fei Chen2, Zeyu Xu2

  • 1Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science and Technology, Nanjing 210044, China.

Entropy (Basel, Switzerland)
|August 26, 2022
PubMed
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This summary is machine-generated.

This study introduces quantum detection for multi-user wireless optical communication, using minimum error discrimination (MED) and unambiguous state discrimination (USD) to efficiently distinguish user signals. USD offers error-free detection, outperforming NOMA in bit error rate.

Area of Science:

  • Quantum Communication
  • Optical Wireless Communication
  • Information Theory

Background:

  • Wireless optical communication faces challenges in multi-user access.
  • Quantum detection offers novel methods for signal discrimination.

Purpose of the Study:

  • To propose and analyze a novel multi-user access scheme for wireless optical communication.
  • To investigate the efficiency of quantum detection methods for distinguishing user signals.
  • To compare the performance of minimum error discrimination (MED) and unambiguous state discrimination (USD).

Main Methods:

  • Utilizing coherent states as signal carriers.
  • Applying quantum detection techniques, specifically MED and USD, for signal discrimination.
  • Theoretical derivation and numerical simulations to evaluate channel capacity and error probability.
Keywords:
multi-accessmulti-user detectionquantum detectionquantum measurementwireless optical communication

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Main Results:

  • Both MED and USD efficiently distinguish user signals at high average photon numbers.
  • MED offers higher channel capacity, while USD provides error-free detection.
  • USD maintains its error-free advantage even with thermal noise, outperforming NOMA in BER vs. SNR.

Conclusions:

  • Quantum detection, particularly USD, presents a robust solution for multi-user wireless optical communication.
  • The proposed scheme enhances channel capacity and significantly improves bit error rate performance.
  • Increasing signal average photon number is key to leveraging USD's error-free capabilities.