论文标题
多用户/单载波pd-noma中可靠TX BF设计的分数编程
Fractional Programming for Robust TX BF Design in Multi-User/Single-Carrier PD-NOMA
论文作者
论文摘要
我们提出了一种新的基于波束的（BB）多输入单输出（MISO） - 通行域NOMA（PD-NOMA）方案（PD-NOMA），其中将总的传输功耗最小化受到规定的信号到式涉及式涉及式（SINR）的要求，以确定为每种使用的信号，并且在该假设下，该假设仅在该假设下，并且在该假设下，该通道的信息是不在的。为此，采用基于分数的编程（FP）的二次变换来将原始问题的非凸sinr约束重新制定为可聊天的二次形式，其中包含CSI误差矢量作为参数的估计值。利用这一事实是，零双重性差距对于非凸二次问题存在，得出了CSI误差向量估计的闭合形式表达式，从而完成了公式。最后，一种基于此处衍生的CSI误差矢量和半延伸弛豫（SDR）技术的新型迭代算法均得到了有效的作用，该技术可有效地有效地解决约束的最小值问题。给出了模拟结果，以说明所提出的算法的有效性，该算法仅牺牲少量发射功率以换取对CSI缺陷的鲁棒性的大幅提高。
We present a new Beamforming-based (BB) Multiple-Input Single-Output (MISO)-Non-orthogonal Multiple Access (NOMA) scheme for Power Domain NOMA (PD-NOMA), in which the total transmit power consumption is minimized subjected to prescribed signal-to-interference-plus-noise ratio (SINR) requirements for each user, and under the assumption that only imperfect channel state information (CSI) is available at the transmitter. To this end, the fractional programming (FP)-based quadratic transform is employed to reformulate the non-convex SINR constraint of the original problem into a tractable quadratic form, which contains an estimate of the CSI error vector as a parameter. Taking advantage of the fact that the zero duality gap holds for the non-convex quadratic problems, a closed-form expression for an estimate of the CSI error vector is derived, completing the formulation. Finally, a novel iterative algorithm based on both the herein derived CSI error vector and the semidefinite relaxation (SDR) technique is contributed, which is shown to capable of efficiently solving the constrained min-power problem. Simulation results are given which illustrate the effectiveness of the proposed algorithm, which is found to sacrifice only small quantities of transmit power in return for a substantial increase in robustness against CSI imperfection.
