This code calculates the performance of a Hadamard receiver [1] when used as optical pre-processor in a receiver at very high baud-rates. The deviation between conventional- and quantum signal processing gets large when the baud-rates increase [2]. Moreover, baud-rates are increasing historically [3]. In this code, you can change the baud-rate, transmission energy, length of the Hadamard sequences and also fiber length. The code considers phase noise resulting from the Kerr effect [4]. The code was used for the publication [5].
REFERENCES
[1] S. Guha, “Structured optical receivers to attain superadditive capacity and the holevo limit,” Phys. Rev. Lett., vol. 106, p. 240502, Jun 2011. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevLett.106.240502
[2] J. N ̈otzel and M. Rosati, “Operating fiber networks in the quantum limit,” 2022. [Online]. Available: https://arxiv.org/abs/2201.12397
[3] S.-A. Li, H. Huang, Z. Pan, R. Yin, Y. Wang, Y. Fang, Y. Zhang, C. Bao, Y. Ren, Z. Li, and Y. Yue, “Enabling technology in high-baud-rate coherent optical communication systems,” IEEE Access, vol. 8, pp. 111 318–111 329, 2020
[4] L. Kunz, M. G. A. Paris, and K. Banaszek, “Noisy propagation of coherent states in a lossy kerr medium,” J. Opt. Soc. Am. B, vol. 35, no. 2, pp. 214–222, Feb 2018. [Online]. Available: http://opg.optica.org/josab/abstract.cfm?URI=josab-35-2-214
[5] Z. Amiri, B. A. Bash and J. Nötzel, "Performance of Quantum Preprocessing under Phase Noise," 2022 IEEE Globecom Workshops (GC Wkshps), Rio de Janeiro, Brazil, 2022, pp. 298-303, doi: 10.1109/GCWkshps56602.2022.10008728 also available on the arXiv under https://doi.org/10.48550/arXiv.2210.14008