研究目的
Investigating the effectiveness of probabilistic shaping signal in direct-detection systems with Kramers-Kronig receiver.
研究成果
The simulation results demonstrate the effectiveness of probabilistic shaping signal in direct-detection systems with Kramers-Kronig receiver, showing OSNR improvements for PS-QAM signals compared to uniform QAM signals. The findings reveal the potential of KK detection in DD system with probabilistic shaping signal.
研究不足
The study is limited by the simulation environment and does not account for all real-world transmission impairments. The performance improvements are observed under specific conditions and may vary with different system configurations.
1：Experimental Design and Method Selection:
The study employs numerical simulations using Matlab to verify the effectiveness of probabilistic shaping in direct detection system with Kramers-Kronig receiver. The system block diagram includes transmitter DSP side processing, signal shaping, transmission through AWGN channel, and receiver side processing including signal detection and reconstruction.
2：Sample Selection and Data Sources:
Random binary sequences are generated and fed into a distributed matcher which distributes the constellation points with the preset probability following Maxwell's Boltzmann distribution.
3：List of Experimental Equipment and Materials:
The simulation setup includes an IQ modulator, AWGN channel, single PD for detection, and Gaussian optical band-pass filter.
4：Experimental Procedures and Operational Workflow:
The signal is shaped with RRC pulse shaping, upconverted, transformed into a SSB signal, transmitted over 100 km, detected, and then reconstructed using KK algorithm.
5：Data Analysis Methods:
The mutual information (MI) of the signal is calculated as an indicator of system performance.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
