Successive Interference Cancellation for ISAC in a Large Full-Duplex Cellular Network
Abstract: To reuse the scarce spectrum efficiently, a large full-duplex cellular network with integrated sensing and communication (ISAC) is studied. Monostatic detection at the base station (BS) is considered. At the BS, we receive two signals: the communication-mode uplink signal to be decoded and the radar-mode signal to be detected. After self-interference cancellation (SIC), inspired by NOMA, successive interference cancellation (SuIC) is a natural strategy at the BS to retrieve both signals. However, the ordering of SuIC, usually based on some measure of channel strength, is not clear as the radar-mode target is unknown. The detection signal suffers a double path-loss making it vulnerable, but the uplink signal to be decoded originates at a user which has much lower power than the BS making it weak as well. Further, the intercell interference from a large network reduces the channel disparity between the two signals. We investigate the impact of both SuIC orders at the BS, i.e., decoding $1{st}$ or detecting $1{st}$ and highlight the importance of careful order selection. We find the existence of a threshold target distance before which detecting $1{st}$ is superior and decoding $2{nd}$ does not suffer much. After this distance, both decoding $1{st}$ and detecting $2{nd}$ is superior. Similarly, a threshold UE power exists after which the optimum SuIC order changes. We consider imperfections in SIC; this helps highlight the vulnerability of the decoding and detection in the setup.
- J. A. Zhang, M. L. Rahman, K. Wu, X. Huang, Y. J. Guo, S. Chen, and J. Yuan, “Enabling joint communication and radar sensing in mobile networks—a survey,” IEEE Commun. Surveys and Tutorials, vol. 24, no. 1, pp. 306–345, 2022.
- M. Chafii, L. Bariah, S. Muhaidat, and M. Debbah, “Twelve scientific challenges for 6G: Rethinking the foundations of communications theory,” IEEE Commun. Surveys and Tutorials, pp. 1–1, 2023.
- K. S. Ali and M. Chafii, “A dynamic transmission strategy for ISAC in large networks,” in Accepted in IEEE Global Communications Conference (GLOBECOM23), 2023.
- S. Ram, S. Singhal, and G. Ghatak, “Optimization of network throughput of joint radar communication system using stochastic geometry,” Frontiers in Signal Processing, vol. 2, 04 2022.
- S. Hong et al., “Applications of self-interference cancellation in 5G and beyond,” IEEE Commun. Mag., vol. 52, no. 2, pp. 114–121, Feb. 2014.
- K. S. Ali, H. ElSawy, and M. S. Alouini, “Modeling cellular networks with full-duplex D2D communication: A stochastic geometry approach,” IEEE Trans. Commun., vol. 64, no. 10, pp. 4409–4424, Oct. 2016.
- K. S. Ali, H. Elsawy, A. Chaaban, and M. S. Alouini, “Non-orthogonal multiple access for large-scale 5G networks: Interference aware design,” IEEE Access, vol. 5, pp. 21 204–21 216, 2017.
- K. S. Ali, M. Haenggi, H. E. Sawy, A. Chaaban, and M. Alouini, “Downlink non-orthogonal multiple access (NOMA) in Poisson networks,” IEEE Trans. Commun., vol. 67, no. 2, pp. 1613–1628, Feb. 2019.
- A. Salem, C. Masouros, F. Liu, and D. López-Pérez, “Rethinking dense cells for integrated sensing and communications: A stochastic geometric view,” CoRR, vol. abs/2212.12942, 2022. [Online]. Available: https://arxiv.org/abs/2212.12942
- Y. Guo, C. Li, C. Zhang, Y. Yao, and B. Xia, “Performance analysis of the full-duplex joint radar and communication system,” in 2021 IEEE/CIC International Conference on Communications in China (ICCC), 2021, pp. 505–510.
- Z. Liu, S. Aditya, H. Li, and B. Clerckx, “Joint transmit and receive beamforming design in full-duplex integrated sensing and communications,” IEEE Journal on Selected Areas in Communications, vol. 41, no. 9, pp. 2907–2919, 2023.
- Q. Nhat Le, V.-D. Nguyen, O. A. Dobre, and H. Shin, “Ris-assisted full-duplex integrated sensing and communication,” IEEE Wireless Communications Letters, vol. 12, no. 10, pp. 1677–1681, 2023.
- Z. Wang, X. Mu, and Y. Liu, “Bidirectional integrated sensing and communication: Full-duplex or half-duplex?” CoRR, vol. abs/2210.14112, 2022. [Online]. Available: https://arxiv.org/abs/2210.14112
- M. Haenggi, “User point processes in cellular networks,” IEEE Wireless Comm. Letters, vol. 6, no. 2, pp. 258–261, Apr. 2017.
- Al-Hourani et al., “Stochastic geometry methods for modeling automotive radar interference,” IEEE Trans. Intelligent Transportation Sys., vol. 19, no. 2, pp. 333–344, 2018.
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