研究目的
To improve the energy efficiency of NOMA VLC systems by designing an optimal power allocation scheme and a joint detection and decoding algorithm, focusing on BER performance enhancement.
研究成果
The proposed transceiver design, including optimal power allocation and JDD algorithm, significantly improves energy efficiency and BER performance over TDMA and SIC-based NOMA, enabling higher data rates with the same BER and SNR.
研究不足
The study assumes LOS links and availability of channel coefficients, which may not hold in all practical scenarios. It focuses on indoor environments and does not address mobility or NLOS effects. The complexity comparison is theoretical and may vary with implementation.
1：Experimental Design and Method Selection:
The study involves designing a transceiver for an indoor NOMA VLC system with one LED and multiple users, using unipolar PAM constellations and ML detection. Theoretical models include channel coefficient calculations and power allocation optimization based on maximizing the minimum Euclidean distance.
2：Sample Selection and Data Sources:
Simulations are conducted in a 4.0 m × 4.0 m × 3.0 m room with users randomly distributed at a height of 0.85 m. Channel coefficients are computed based on LOS links and normalized.
3：0 m × 0 m × 0 m room with users randomly distributed at a height of 85 m. Channel coefficients are computed based on LOS links and normalized.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Key parameters include room size, LED coordinates, PD detector area, field-of-view angle, half-power angle, and receiver height. Specific equipment models or brands are not mentioned.
4：Experimental Procedures and Operational Workflow:
Computer simulations are performed to evaluate BER performance, comparing proposed NOMA with TDMA and JDD with SIC. SNR is defined as 1/σ2 for normalized peak optical power.
5：Data Analysis Methods:
BER performance is analyzed through simulations, with gains calculated using logarithmic ratios of Euclidean distances.
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