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Performance Comparison of Repetition Coding MIMO Optical Wireless Communications with Distinct Light Beams
Jupeng Ding1, Chih-Lin I2, Jintao Wang3
1Key Laboratory of Signal Detection and Processing in Xinjiang Uygur Autonomous Region, School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China.
This study explores non-Lambertian light beams for multiple-input multiple-output (MIMO) optical wireless communication (OWC) systems. Non-Lambertian configurations significantly improve signal-to-noise ratio (SNR) compared to traditional Lambertian setups.
Area of Science:
- Optical Wireless Communications (OWC)
- Wireless Networking
- Optical Engineering
Background:
- Current multiple-input multiple-output (MIMO) techniques in optical wireless communications (OWC) primarily use Lambertian light beams.
- This approach overlooks the potential benefits of light beam diversity and non-Lambertian emission characteristics.
Purpose of the Study:
- To investigate the performance gains of using distinct non-Lambertian light beams from light-emitting diodes (LEDs) in MIMO OWC links.
- To compare the spatial coverage performance of homogeneous and heterogeneous non-Lambertian MIMO configurations against traditional Lambertian configurations.
Main Methods:
- Configuration of homogeneous and heterogeneous non-Lambertian MIMO OWC links using commercially available LEDs in indoor settings.
- Application of the low-complexity repetition coding (RC) MIMO algorithm for performance analysis.
- Comparative analysis of spatial coverage performance.
Main Results:
- The homogeneous non-Lambertian configuration achieved an average signal-to-noise ratio (SNR) exceeding 30 dB.
- The heterogeneous non-Lambertian configuration reached an average SNR of up to 28.77 dB.
- The conventional Lambertian configuration yielded an average SNR of approximately 27.00 dB.
Conclusions:
- Non-Lambertian light beams offer significant performance advantages in MIMO OWC systems.
- This research provides a foundation for optimizing MIMO OWC by considering novel light beam dimensions.
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