论文标题
MISO通信的叠加RIS相调制的通用框架
A Universal Framework of Superimposed RIS-Phase Modulation for MISO Communication
论文作者
论文摘要
为了充分利用可重构智能表面（RIS）带来的额外维度，信息理论最近提出，对RIS阶段进行调节信息可以以提高通信速率发送额外的信息。在本文中，我们提出了一种新型的叠加RIS相调制（SRPM）方案，以通过将信息带相位偏移到常规优化的RIS阶段传输额外信息。提出的SRPM被解释为RIS相位调制的通用框架。提出的SRPM的平均位错误率（ABER）的理论结合也以最大可能性（ML）检测得出。对于所有参数设置，多样性顺序的特征为0.5，这对于确定相位调制参数的最佳选择很有用。此外，我们发现，反射元素的RIS数量或发射天线的数量增加一倍，等于SRPM的发射功率的3 dB增量。数值结果证明了SRPM的有效性，并表明它比现有方案实现了更多位的可靠交流。
To fully exploit the additional dimension brought by reconfigurable intelligent surface (RIS), it is recently suggested by information theory that modulating information upon RIS phases is able to send extra information with increased communication rate. In this paper, we propose a novel superimposed RIS-phase modulation (SRPM) scheme to transfer extra messages by superimposing information-bearing phase offsets to conventionally optimized RIS phases. The proposed SRPM is interpreted as a universal framework for RIS phase modulation. Theoretical union bound of the average bit error rate (ABER) of the proposed SRPM is also derived with the maximum likelihood (ML) detection. The diversity order is characterized as 0.5 for all parameter settings, which is useful for determining the optimal choice of the phase modulation parameters. Furthermore, we discover that doubling the number of either RIS reflecting elements or the transmit antennas is equivalent to a 3 dB increment in the transmit power for SRPM. Numerical results demonstrate the effectiveness of SRPM and reveal that it achieves reliable communication of more bits than existing schemes.
