论文标题
宽带毫米波的光束选择依靠镜头天线阵列
Beam Selection for Wideband Millimeter Wave MIMO Relying on Lens Antenna Arrays
论文作者
论文摘要
依靠镜头天线阵列的Beamspace多输入多输出（MIMO）可以通过梁选择大大减少毫米波（MMWave）通信系统中的射频链的数量。但是，宽带mmwave mimo系统实际上是频率依赖的。这种现象称为梁斜视，当使用传统的梁选择方法时，该现象将恶化系统的性能。为了解决此问题，我们提出了一种依赖镜头天线阵列的MMWave MIMO系统的宽带光束选择方法。首先，我们为每个用户在整个频段上选择一个具有最大能量的光束，然后顺序选择对总和率最大的梁。还提供了提出的宽带光束选择方法的性能分析。数值结果表明，与传统同行相比，所提出的方法可实现更高的总和率和能源效率。
Beamspace multi-input multi-output (MIMO) relying on lens antenna arrays can significantly reduce the number of radio-frequency chains in millimeter-wave (mmWave) communication systems through beam selection. However, the beamforming gain is actually frequency-dependent in wideband mmWave MIMO systems. This phenomenon is called beam squint, which will deteriorate the system's performance when traditional beam selection methods are used. To solve this problem, we propose a wideband beam selection method for mmWave MIMO systems relying on lens antenna arrays. Firstly, we select one beam with the maximal energy averaged over the whole band for each user and then we sequentially select the beams that contribute the most to the sum-rate. Performance analysis of the proposed wideband beam selection method is also presented. Numerical results show that the proposed method achieves higher sum-rate and energy efficiency compared with its traditional counterparts.
