| Autor: |
Jiahao, Huo, Jin, Zhu, Zuqing, Zhu, Xiaoying, Zhang, Shaonan, Liu, Jianlong, Tao, Huangfu, Wei |
| Zdroj: |
China Communications Magazine; 2024, Vol. 21 Issue: 4 p1-9, 9p |
| Abstrakt: |
This paper aimed to propose two algorithms, DA-M and RF-M, of reducing the impact of multipath interference (MPI) on intensity modulation direct detection (IM-DD) systems, particularly for four-level pulse amplitude modulation (PAM4) systems. DA-M reduced the fluctuation by averaging the signal in blocks, RF-M estimated MPI by subtracting the decision value of the corresponding block from the mean value of a signal block, and then generated interference-reduced samples by subtracting the interference signal from the product of the corresponding MPI estimate and then weighting factor. This paper firstly proposed to separate the signal before decision — making into multiple blocks, which significantly reduced the complexity of DA-M and RF-M. Simulation results showed that the MPI noise of 28 GBaud IM-DD system under the linewidths of 1e5 Hz, 1e6 Hz and 10e6 Hz can be effectively alleviated. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
