Joint communication and sensing (JCAS) is a promising technology for 6th Generation (6G) mobile networks, such as intelligent vehicular networks, intelligent manufacturing, and so on. Equipped with two spatially separated antenna arrays, the base station (BS) can perform downlink active JCAS in a mono-static setup. This paper proposes a Concurrent Downlink and Uplink (CDU) JCAS system where the BS can use the echo of transmitted dedicated signals for sensing in the uplink timeslot, while performing reliable uplink communication. A novel successive interference cancellation-based CDU JCAS processing method is proposed to enable the estimation of uplink communication symbols and downlink sensing parameters. Extensive simulation results verify the feasibility of the CDU JCAS system, showing a performance improvement of more than 10 dB compared to traditional JCAS methods while maintaining reliable uplink communication.

翻译：联合通信和遥感(JCAS)是第六代(6G)移动网络的一个很有希望的技术,例如智能车辆网络、智能制造等。基地台站(BS)配备了两个空间分隔的天线阵列,可以在单一静态装置下运行主动的下链路 JCAS。本文建议采用同步下链路和上链路(CDU) JCAS系统,BS可以使用传输专用信号的回声在上链路时段进行遥感,同时进行可靠的上链路通信。建议采用新的连续式干扰取消式CDU JCAS处理方法,以便能够估计上链路通信符号和下链路传感器参数。广泛的模拟结果验证了CDU JCAS系统的可行性,显示与传统的JCAS系统相比,性能改进超过10 dB,同时保持可靠的上链路通信。