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Integrated sensing and communication (ISAC) has become one of the main technologies in 6G communications . By realizing the communication and sensing in the same spectrum, ISAC can avoid the interference and improve the spectrum efficiency. However, the increasing demands for high communication spectrum leads to the increase of costs and energy consumption, which also influences the signal propagation range. The emerging reconfigurable intelligent surface (RIS) technology can properly adjust the transmission environment and control the wireless channel to a certain extent. It is feasible to introduce RIS into the ISAC system and improve the communication quality and coverage .In this paper, we study the 3D positioning and beamforming design in dual-RIS assisted ISAC system, then we transform the localization in the ISAC system into a compressed sensing (CS) problem and propose a stepwise matching pursuit (SMP) algorithm. Based on the positioning information, we complete the beamforming design of the BS and RISs by an alternating optimization algorithm based on the triangle inequality (TI-AO). |
IEEE/ICACT20240241 Slide.03
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