A non-orthogonal multiple access (NOMA) empowered integrated sensing and communication (ISAC) framework is investigated. A dual-functional base station serves multiple communication users employing NOMA, while the superimposed NOMA communication signal is simultaneously exploited for target sensing. A beamforming design problem is formulated to maximize the weighted sum of the communication throughput and the effective sensing power. To solve this problem, an efficient double-layer penalty-based algorithm is proposed by invoking successive convex approximation (SCA). Numerical results show that the proposed NOMA-ISAC approaches the ideal ISAC system and outperforms the conventional ISAC in the underloaded regime experiencing high-correlated channels and in the overloaded regime.
翻译:调查了非垂直多功能接入(NOMA)授权的综合遥感和通信(ISAC)框架,一个双功能基站为使用NOMA的多个通信用户服务,同时利用超载的NOMA通信信号进行目标感测,设计波形设计问题以最大限度地增加通信输送量的加权和有效感测能力;为解决这一问题,建议采用高效的双层惩罚算法,方法是采用连续的convex近似法(SCA),数值结果显示,拟议的NOMA-ISAC接近理想的ISAC系统,在载荷不足的系统、高孔相关管道和超载系统中优于常规的ISAC。