Joint Microstrip Selection and Beamforming Design for MmWave Systems with Dynamic Metasurface Antennas
Joint Microstrip Selection and Beamforming Design for MmWave Systems with Dynamic Metasurface Antennas
复制标题
具有动态超表面天线的毫米波系统的联合微带选择和波束成形设计
DOI：
10.1109/icassp49357.2023.10096260
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Y. Eldar
中科院分区：
文献类型：
--
作者：
Wei Huang;Haiyang Zhang;Nir Shlezinger;Y. Eldar
动态超颖表面天线（DMA）为未来无线系统实现大规模天线阵列提供了一种新的范例。在本文中，我们研究了下行毫米波（mmWave）DMA系统与有限数量的射频（RF）链。通过使用特定的DMA结构，具有混合波束成形的等效毫米波信道模型首先被明确地表征。在此基础上，我们提出了一种有效的联合微带选择和波束成形方案，以适应有限数量的RF链。提出了一种基于通道增益的微带选择的低复杂度数字波束形成方案，而模拟波束形成器通过坐标上升法获得。数值计算表明，该方案的性能接近DMA没有RF链减少，验证了所提出的计划的有效性。
Dynamic metasurface antennas (DMAs) provide a new paradigm to realize large-scale antenna arrays for future wireless systems. In this paper, we study the downlink millimeter wave (mmWave) DMA systems with limited number of radio frequency (RF) chains. By using the specific DMA structure, an equivalent mmWave channel model with hybrid beamforming is first explicitly characterized. Based on that, we propose an effective joint microstrip selection and beamforming scheme to accommodate for the limited number of RF chains. A low-complexity digital beamforming solution with channel gain-based microstrip selection is developed, while the analog beamformer is obtained via a coordinate ascent method. The proposed scheme is numerically shown to approach the performance of DMAs without RF chain reduction, verifying the effectiveness of the proposed schemes.