In this letter, we investigate error performance of rectangular pulse-shaped orthogonal time frequency space (OTFS) modulation with a practical receiver. Specifically, we consider an essential bandpass filter at receiver RF front-end, which has been ignored in existing works. We analyse the effect of rectangular pulses on practical OTFS receiver performance, and derive the exact forms of interference in delay-Doppler (DD) domain. We demonstrate that the transmitted information symbols in certain regions of the DD domain are severely contaminated. As a result, there is an error floor in the receiver error performance, which needs to be addressed for such OTFS waveform in practical systems.
Cite
@article{arxiv.2211.03388,
title = {Error Performance of Rectangular Pulse-shaped OTFS with Practical Receivers},
author = {Cheng Shen and Jinhong Yuan and Hai Lin},
journal= {arXiv preprint arXiv:2211.03388},
year = {2022}
}