论文标题
朝向无缝的传感覆盖范围，用于细胞整合感应和通信
Beamforming Towards Seamless Sensing Coverage for Cellular Integrated Sensing and Communication
论文作者
论文摘要
预计第六代（6G）移动通信网络将提供新的蜂窝集成感应和通信（ISAC）的范式。但是，由于在覆盖范围要求方面感测和通信之间存在固有的差异，因此，故意计划的当前蜂窝网络很难实现无缝的感应覆盖范围。为了解决这个问题，本文研究了基本双静态ISAC系统的无缝传感覆盖范围的波束形成优化，同时确保满足了多个用户设备（UES）的通信要求。为此，提出了一个优化问题，以最大程度地提高规定的覆盖区域中最坏的传感信号 - 噪声比（SNR），但要受到每个UE的信噪比与噪声比率（SINR）的要求。为了获得一些见解，我们首先使用一个单个UE和一个单个感应点研究了特殊情况，为此，获得了最佳光束成形的封闭式表达。对于具有多个通信UES和连续区域传感覆盖率的一般情况，提出了基于连续凸近似（SCA）的有效算法来解决非Convex Beam Forming优化问题。数值结果表明，所提出的设计能够在规定的区域实现无缝的感应覆盖范围，同时保证了UES的通信要求。
The sixth generation (6G) mobile communication networks are expected to offer a new paradigm of cellular integrated sensing and communication (ISAC). However, due to the intrinsic difference between sensing and communication in terms of coverage requirement, current cellular networks that are deliberately planned mainly for communication coverage are difficult to achieve seamless sensing coverage. To address this issue, this paper studies the beamforming optimization towards seamless sensing coverage for a basic bi-static ISAC system, while ensuring that the communication requirements of multiple users equipment (UEs) are satisfied. Towards this end, an optimization problem is formulated to maximize the worst-case sensing signal-to-noise ratio (SNR) in a prescribed coverage region, subject to the signal-to-interference-plus-noise ratio (SINR) requirement for each UE. To gain some insights, we first investigate the special case with one single UE and one single sensing point, for which a closed-from expression of the optimal beamforming is obtained. For the general case with multiple communication UEs and contiguous regional sensing coverage, an efficient algorithm based on successive convex approximation (SCA) is proposed to solve the non-convex beamforming optimization problem. Numerical results demonstrate that the proposed design is able to achieve seamless sensing coverage in the prescribed region, while guaranteeing the communication requirements of the UEs.
