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Simultaneous channel estimation and signal detection in wireless ultraviolet communications combating
Optics Express
|February 7, 2018
Summary
This study introduces a Bayesian scheme for wireless ultraviolet communications (UVCs) to overcome inter-symbol interference (ISI). The new method accurately estimates UV channel state information (CSI) and improves signal detection.
Area of Science:
- Electromagnetics and Optics
- Wireless Communications
- Signal Processing
Background:
- Wireless ultraviolet communications (UVCs) face challenges with inter-symbol interference (ISI).
- Unknown channel characteristics exacerbate ISI issues, hindering signal detection.
- Accurate channel state information (CSI) is crucial for reliable UVCs.
Purpose of the Study:
- To propose a Bayesian scheme for simultaneous UV channel estimation and signal detection.
- To address and mitigate the impact of ISI in UVCs.
- To improve the performance of UVC systems under uncertain channel conditions.
Main Methods:
- Developed a UV channel-related Bayesian scheme.
- Investigated the UV single-scattering photon model to formulate dynamic CSI behaviors.
- Employed a sequential Bayesian process for UV CSI estimation.
Main Results:
- Achieved promising channel estimation performance with relative errors below 4%.
- Gained an additional 4dB detection performance compared to imperfect MLSD.
- Demonstrated effective mitigation of ISI disturbance.
Conclusions:
- The proposed Bayesian scheme effectively estimates UV CSI and detects signals simultaneously.
- The method offers significant performance improvements over existing techniques.
- This approach enhances the reliability and efficiency of wireless ultraviolet communications.
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