On the Performance of Uplink and Downlink Integrated Sensing and Communication Systems
Meng Liu, Minglei Yang, Arumugam Nallanathan
Abstract
We investigate an integrated sensing and communication (ISAC) system, where the full-duplex base station (BS) can serve the downlink (DL) and uplink (UL) communication Internet-of-Things (IoT) devices and detect targets simultaneously. As a further advance, non-orthogonal multiple access (NOMA) is taken into account to further improve the communication and sensing performances as well as the spectrum efficiency. The exact and asymptotic outage probabilities (OPs) of the DL and UL IoT devices are derived to evaluate the system performance for communication. Furthermore, the sensing performance is studied by deriving the probability of successful detection (PoD). The simulation results reveal that the proposed ISAC NOMA system outperforms the pure ISAC system in terms of the OP and PoD.