研究目的
Investigating the optimization scheme based on transmitters selection for MIMO VLC systems to improve channel capacity and achieve considerable BER performance for each receiver.
研究成果
The proposed optimization scheme based on transmitter selection significantly improves the channel capacity and BER performance of indoor MIMO VLC systems under different channel correlation conditions. It also offers energy-saving benefits by turning off the modulation module for unselected transmitters.
研究不足
The study focuses on direct links and ignores the signal power received by the wall reflection path, which might affect the system's performance in real-world scenarios. Additionally, the simulation parameters are normalized for convenience, which may not fully represent actual conditions.
1：Experimental Design and Method Selection:
The study uses singular value decomposition (SVD) to select transmitters with good performance for transmission and allocates power based on the principle of equal bit error rate (BER) of the receivers.
2：Sample Selection and Data Sources:
A 4×3 indoor MIMO VLC channel model is considered, focusing on direct links and ignoring wall reflection paths.
3：List of Experimental Equipment and Materials:
LEDs and photodetectors (PDs) are used in the system model.
4：Experimental Procedures and Operational Workflow:
LEDs are arranged in combinations, and each combination's channel DC gain matrix is given based on the Lambertian radiation model. The channel matrix is then singular value decomposed to select the LEDs combination with the largest singular value for transmission.
5：Data Analysis Methods:
The performance is analyzed in terms of channel capacity and BER, comparing the proposed method with the ZF algorithm under different channel correlation conditions.
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