论文标题
NOMA将传感和通信朝向6G：多访问视角
NOMA for Integrating Sensing and Communications towards 6G: A Multiple Access Perspective
论文作者
论文摘要
本文从多个访问（MA）角度侧重于综合传感和通信（ISAC）的发展，在这些观点中，非正交多访问（NOMA）的想法被利用以和谐地适应感应和交流功能。我们首先揭示了ISAC的发展趋势是从\ emph {正交性}到\ emph {non-Ortrodonality}，并介绍了下行链路和上行链路ISAC的基本模型，同时从MA的角度识别设计挑战。 （1）对于下行的ISAC，我们提出了两种新型设计，即\ emph {noma-empopered}下行链路ISAC和\ emph {noma-inma-inma-inspired} downlink isac分别有效地协调了用户间的干扰和传感到交流性交流。 （2）对于上行链接ISAC，我们首先提出了\ emph {pure-noma}上行链路ISAC设计，其中采用了固定的通信连续的干扰取消顺序来区分通过完全共享的无线电资源收到的混合感应传感信号。然后，我们提出了一个普通\ emph {semi-noma}上行链路ISAC设计，其中包括常规的正交多访问基于多访问和基于纯的纯链路的uplink ISAC作为特殊情况，因此能够在感应和通信之间提供灵活的资源分配策略。沿着每个提出的Noma-ISAC设计，提供了数值结果，以显示出于常规ISAC设计的优越性。
This article focuses on the development of integrated sensing and communications (ISAC) from a multiple access (MA) perspective, where the idea of non-orthogonal multiple access (NOMA) is exploited for harmoniously accommodating the sensing and communication functionalities. We first reveal that the developing trend of ISAC is from \emph{orthogonality} to \emph{non-orthogonality}, and introduce the fundamental models of the downlink and uplink ISAC while identifying the design challenges from the MA perspective. (1) For the downlink ISAC, we propose two novel designs, namely \emph{NOMA-empowered} downlink ISAC and \emph{NOMA-inspired} downlink ISAC to effectively coordinate the inter-user interference and the sensing-to-communication interference, respectively. (2) For the uplink ISAC, we first propose a \emph{pure-NOMA-based} uplink ISAC design, where a fixed communication-to-sensing successive interference cancellation order is employed for distinguishing the mixed sensing-communication signal received over the fully shared radio resources. Then, we propose a general \emph{semi-NOMA-based} uplink ISAC design, which includes the conventional orthogonal multiple access-based and pure-NOMA-based uplink ISAC as special cases, thus being capable of providing flexible resource allocation strategies between sensing and communication. Along each proposed NOMA-ISAC design, numerical results are provided for showing the superiority over conventional ISAC designs.
