论文标题
旋转MU-MISO系统的矢量扰动通道反演
Vector Perturbation Channel Inversion for SWIPT MU-MISO Systems
论文作者
论文摘要
这封信研究了使用矢量扰动（VP）预编码以同时传达多用户多输入单输出（MU-MISO）下行链路通道中的信息和能量。我们表明，除了为线性通道反演技术提供的信息容量益处外，它还会增强由于扩展符号星座而增强接收器的收获能量。为了进一步提高收获性能，提出的修改后的VP技术（命名VP-EH）设计了VP整数偏移，以最大程度地提高交付功率。提出的方案结合了整数最小二问题，以找到最接近的晶格点，即通过瑞利商优化问题给出的点。最后，提出了传统副总裁和VP-EH之间的凸组合，以实现最大化信息或能源之间的权衡。理论和仿真结果验证了VP是同时传达MU-MISO系统中信息和能量的有前途的技术。
This letter investigates the employment of vector-perturbation (VP) precoding to convey simultaneously information and energy in multiple-user multiple-input single-output (MU-MISO) downlink channel. We show that the conventional VP in addition to the information capacity benefits that provides to linear channel inversion techniques, it enhances the harvested energy at the receivers due to the extended symbol constellation. To further boost harvesting performance, the proposed modified VP technique (named VP-EH) designs the VP integer offsets in order to maximize the delivered power. The proposed scheme incorporates an integer least square problem to find the closest lattice point to a point which is given by a Rayleigh quotient optimization problem. Finally, a convex combination between conventional VP and VP-EH is proposed to achieve a trade-off between maximizing information or energy. Theoretical and simulations results validate that VP is a promising technique to simultaneously convey information and energy in MU-MISO systems.
