Native and Reconfigurable Distributed Acoustic Sensing Integrated with Single-carrier 64QAM Transmission Signal

We propose a native and reconfigurable ISAC scheme to extract DAS directly from 64QAM transmission signal, realizing flexible spatial resolutions ranging from 1.6m to 8m, with corresponding phase noise floors from -64.5dB to $-48.9 \mathrm{~dB} \mathrm{rad}^{2} / \mathrm{Hz}$.