Power Allocation Strategy for Joint Communications and Sensing in NOMA-assisted Low-Latency Networks
Conference: European Wireless 2022 - 27th European Wireless Conference
09/19/2022 - 09/21/2022 at Dresden, Germany
Proceedings: European Wireless 2022
Pages: 6Language: englishTyp: PDF
Authors:
Zhu, Yao; Hu, Yulin; Tong, Wuwan; Schmeink, Anke (Chair of Information Theory and Data Analytics, RWTH Aachen University, Aachen, Germany)
Caire, Giuseppe (Faculty of Electrical Engineering and Computer Science, Technical University of Berlin, Germany)
Abstract:
Joint communication and sensing (JCAS) is envisioned as the enabler to many advanced applications in future 6G networks. This paper investigates a power allocation strategy for JCAS networks with multiple transmitters and receivers. To take advantage of spatial diversity, the dual-functional radio signal is constructed via superimposed NOMA. Moreover, to fulfill the stringent latency requirement, transmissions are carried out with finite blocklength (FBL) codes. We formulate the optimization problem aimed at maximizing the minimal transmission rate among NOMA users while guaranteeing the target estimation requirement, which is represented by the Cramer-Rao lower bound (CRLB). An efficient approach is proposed to obtain the optimal solutions based on the characterization of communication and sensing metrics. Via simulation, the analytical finding are validated and insights into the trade-off between communication and radar sensing in JCAS networks are provided.