论文标题
带RIS辅助的自我干扰减轻带内包装的收发器
RIS-Assisted Self-Interference Mitigation for In-Band Full-Duplex Transceivers
论文作者
论文摘要
从理论上讲，无线内部全双工（IBFD）技术可以使系统容量超过常规频分式双工（FDD）或时间划分双工（TDD）替代方案。但是，IBFD的强大自我干扰可能会导致类似物到数字转换器（ADC）的过度量化噪声，这代表了其实际实施的障碍。在本文中，我们考虑使用可重构的智能表面（RIS）进行IBFD通信。尽管BS在同一频带上同时传输并从用户接收信号，但它可以调整RIS的反射系数以配置无线通道，从而在繁殖域中充分缓解BS的自我干扰。考虑到量化噪声的影响，我们建议共同设计下行链路（DL）预编码矩阵和RIS系数，以最大程度地提高上行链路（UL）和DL速率的总和。通过模拟研究验证了拟议的RIS辅助内花线（RAIBFD）系统的有效性，甚至考虑到RIS的相位仅具有有限的分辨率。
The wireless in-band full-duplex (IBFD) technology can in theory double the system capacity over the conventional frequency division duplex (FDD) or time-division duplex (TDD) alternatives. But the strong self-interference of the IBFD can cause excessive quantization noise in the analog-to-digital converters (ADC), which represents the hurdle for its real implementation. In this paper, we consider employing a reconfigurable intelligent surface (RIS) for IBFD communications. While the BS transmits and receives the signals to and from the users simultaneously on the same frequency band, it can adjust the reflection coefficients of the RIS to configure the wireless channel so that the self-interference of the BS is sufficiently mitigated in the propagation domain. Taking the impact of the quantization noise into account, we propose to jointly design the downlink (DL) precoding matrix and the RIS coefficients to maximize the sum of uplink (UL) and DL rates. The effectiveness of the proposed RIS-assisted in-band full-duplex (RAIBFD) system is verified by simulation studies, even taking into considerations that the phases of the RIS have only finite resolution.
