A large network employing integrated sensing and communication (ISAC) where a single transmit signal by the base station (BS) serves both the radar and communication modes is studied. We consider bistatic detection at a passive radar and monostatic detection at the transmitting BS. The radar-mode performance is significantly more vulnerable than the communication-mode due to the double path-loss in the signal component while interferers have direct links. To combat this, we propose: 1) a novel dynamic transmission strategy (DTS), 2) joint monostatic and bistation detection via cooperation at the BS. We analyze the performance of monostatic, bistatic and joint detection. We show that bistatic detection with dense deployment of low-cost passive radars offers robustness in detection for farther off targets. Significant improvements in radar-performance can be attained with joint detection in certain scenarios, while using one strategy is beneficial in others. Our results highlight that with DTS we are able to significantly improve quality of radar detection at the cost of quantity. Further, DTS causes some performance deterioration to the communication-mode; however, the gains attained for the radar-mode are much higher. We show that joint detection and DTS together can significantly improve radar performance from a traditional radar-network.

翻译：本文研究了采用集成感知与通信（ISAC）技术的大型网络，其中基站（BS）的单一发射信号同时服务于雷达与通信模式。我们考虑了被动雷达的双基地检测和发射基站的单基地检测。由于信号分量的双程路径损耗而干扰源具有直射链路，雷达模式的性能显著弱于通信模式。为解决这一问题，我们提出：1）一种新型动态传输策略（DTS），2）通过基站协作实现单基地与双基地联合检测。我们分析了单基地、双基地及联合检测的性能。结果表明：部署低成本被动雷达的密集双基地检测对远距离目标具有稳健的检测能力；在某些场景下联合检测可显著提升雷达性能，而其他场景则适用单一策略。研究结果强调，采用DTS能以检测数量为代价显著提升雷达检测质量。此外，DTS虽对通信模式造成一定性能损失，但雷达模式获得的增益远高于此。我们证明，联合检测与DTS相结合可显著提升传统雷达网络的性能。