We experimentally evaluated the sensing-communication trade-off from the fixed-point precision MIMO equalizer using FPGA. At 7-bit, noise floor drops 100x and angular error 63%, but the communication performance saturates while the hardware complexity rises.
@article{arxiv.2605.17521,
title = {FPGA-Based Experimental Analysis of Fixed-Point Precision Impact on SOP Estimation in Coherent Communications Receivers},
author = {Geraldo Gomes and Rafael Vieira and Hani Kbashi and Aleksandr Donodin and Shekhar Saxena and Stylianos Sygletos and Ian Phillips and Jaroslaw E. Prilepsky and Mikael Mazur and Sergei K. Turitsyn and Pedro Freire},
journal= {arXiv preprint arXiv:2605.17521},
year = {2026}
}