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Flexible NOMA-based NOHO-OFDM scheme for visible light communication with iterative interference cancellation
Optics Express
|March 17, 2021
Summary
A new flexible non-orthogonal hybrid optical OFDM (NOHO-OFDM) scheme boosts visible light communication data rates. Combined with iteratively successive interference cancellation (ISIC), it significantly reduces errors and enhances performance over orthogonal methods.
Area of Science:
- Optical Communications
- Wireless Communication Technologies
- Signal Processing
Background:
- Visible light communication (VLC) systems offer high bandwidth and security but face limitations in achievable data rates.
- Existing orthogonal frequency division multiplexing (OFDM) schemes in VLC can be inefficient in spectrum utilization.
- Non-orthogonal multiple access (NOMA) techniques show promise for improving spectral efficiency in communication systems.
Purpose of the Study:
- To propose a novel flexible non-orthogonal hybrid optical OFDM (NOHO-OFDM) modulation scheme for VLC systems.
- To investigate the effectiveness of an iteratively successive interference cancellation (ISIC) receiver in mitigating estimation errors.
- To analyze and compare the achievable data rate and performance of the proposed NOHO-OFDM scheme against orthogonal counterparts.
Main Methods:
- Development of the non-orthogonal hybrid optical OFDM (NOHO-OFDM) modulation scheme.
- Implementation and testing of an iteratively successive interference cancellation (ISIC) receiver algorithm.
- Experimental validation of the bit error rate (BER) performance.
- Simulation-based analysis of the achievable data rate region.
Main Results:
- The proposed ISIC scheme significantly reduces the bit error rate (BER) for the NOHO-OFDM system.
- Experimental results demonstrate that NOHO-OFDM achieves superior data rates compared to traditional orthogonal schemes.
- Simulation results indicate a larger achievable data rate region for NOHO-OFDM than for orthogonal schemes.
- The NOHO-OFDM scheme offers high efficiency in increasing the achievable data rate for VLC.
Conclusions:
- The NOHO-OFDM scheme, coupled with ISIC, presents a highly efficient solution for enhancing VLC data rates.
- The proposed scheme overcomes limitations of orthogonal methods, offering improved spectral efficiency and performance.
- NOHO-OFDM with ISIC is a promising technology for future high-speed visible light communication systems.
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