This paper introduces a novel adaptive transmission scheme to amplify the prowess of coordinated direct and relay transmission (CDRT) systems rooted in non-orthogonal multiple access principles. Leveraging the maximum ratio transmission scheme, we seamlessly meet the prerequisites of CDRT while harnessing the potential of dynamic power allocation and directional antennas to elevate the system's operational efficiency. Through meticulous derivations, we unveil closed-form expressions depicting the exact effective sum throughput. Our simulation results adeptly validate the theoretical analysis and vividly showcase the effectiveness of the proposed scheme.

翻译：本文提出一种新颖的自适应传输方案，用于增强基于非正交多址接入原理的协同直传与中继传输（CDRT）系统的性能。通过利用最大比传输方案，我们在满足CDRT系统需求的同时，充分挖掘动态功率分配与定向天线的潜力，以提升系统运行效率。经严格推导，我们揭示了表征精确有效和吞吐量的闭式表达式。仿真结果有效验证了理论分析，并清晰展示了所提方案的有效性。