OFDM sensing is gaining increasing popularity in wideband radar applications as well as in joint communication and radar/radio sensing (JCAS). As JCAS will potentially be integrated into future mobile networks where OFDM is crucial, OFDM sensing is envisioned to be ubiquitously deployed. A fast Fourier transform (FFT) based OFDM sensing (FOS) method was proposed a decade ago and has been regarded as a de facto standard given its simplicity. In this article, we introduce an easy trick -- a pre-processing on target echo -- to further reduce the computational complexity of FOS without degrading key sensing performance. Underlying the trick is a newly disclosed feature of the target echo in OFDM sensing which, to the best of our knowledge, has not been effectively exploited yet.
@article{arxiv.2105.13596,
title = {A Low-Complexity Method for FFT-based OFDM Sensing},
author = {Kai Wu and J. Andrew Zhang and Xiaojing Huang and Y. Jay Guo},
journal= {arXiv preprint arXiv:2105.13596},
year = {2021}
}
Comments
10 pages, 4 pages; submitted for potential publication