A point-to-point integrated sensing and communication (ISAC) system is considered where a transmitter conveys a message to a receiver over a discrete memoryless channel (DMC) and simultaneously estimates the state of the channel through the backscattered signals of the emitted waveform. We derive achievability and converse bounds on the rate-distortion-error tradeoff in the finite blocklength regime, and also characterize the second-order rate-distortion-error region for the proposed setup. Numerical analysis shows that our proposed joint ISAC scheme significantly outperforms traditional time-sharing based schemes where the available resources are split between the sensing and communication tasks.
@article{arxiv.2401.15752,
title = {Integrated Sensing and Communication in the Finite Blocklength Regime},
author = {Homa Nikbakht and Michèle Wigger and Shlomo Shamai and H. Vincent Poor},
journal= {arXiv preprint arXiv:2401.15752},
year = {2025}
}