NOMA-Aided Joint Radar and Multicast-Unicast Communication Systems

The novel concept of non-orthogonal multiple access (NOMA) aided joint radar and multicast-unicast communication (Rad-MU-Com) is investigated. Employing the same spectrum resource, a multi-input-multi-output (MIMO) dual-functional radar-communication (DFRC) base station detects radar-centric users (R-user), while transmitting mixed messages both to R-user communication-centric user (C-user). In particular, multicast information intended for R- C-users, whereas unicast only C-user. More explicitly, NOMA employed facilitate this double sharing, where signals are superimposed in power domain also exploited as probing waveforms. First, beamformer-based NOMA-aided Rad-MU-Com framework proposed system having single Based on framework, rate maximization problem formulated by optimizing beamformers employed, satisfying requirement predefined accuracy beam pattern. resultant non-convex optimization solved penalty-based iterative algorithm find high-quality near-optimal solution. Next, extended scenario pairs cluster-based proposed. A beamformer design allocation sum at each C-user, subject constraints minimum R&C pair pattern detecting R-users. efficiently another developed.