研究目的
To propose a new solution for optical OFDM systems that eliminates the need for applying the Hermitian symmetry in the generation of optical OFDM signals, improving power efficiency and computational complexity while maintaining the same BER as traditional systems.
研究成果
The proposed real-DFT based O-OFDM technique achieves 50% power savings and 15% to 27% savings in the number of required complex computations compared to traditional Hermitian symmetry methods, while maintaining the same BER. This makes it a promising alternative for both PONs and VLC systems.
研究不足
The study is limited to simulation-based analysis using Matlab. Real-world implementation challenges and variations in optical channel conditions are not considered.
1：Experimental Design and Method Selection:
The study employs a Real-DFT based algorithm to replace the Hermitian symmetry in generating optical OFDM signals. The algorithm allows the recovery of complex modulation symbols from the real part of the IDFT of the data.
2：Sample Selection and Data Sources:
The proposed system is simulated using Matlab with 105 frames, 128 sub-carriers, and both BPSK and QPSK modulations.
3：List of Experimental Equipment and Materials:
Matlab simulation software is used for performance analysis.
4：Experimental Procedures and Operational Workflow:
The performance of the system is compared to traditional Hermitian symmetry solutions in terms of average signal power, computational complexity, and bit-error rate.
5：Data Analysis Methods:
The number of arithmetic operations for generating the O-OFDM is used as a metric for computational complexity. BER is determined using Monte-Carlo Simulation method.
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