Owing to the critical path loss of the millimeter wave band (mmWave), the signal sent by the base station (BS) is severely attenuated when it reaches indoors. Recent studies have proposed a glass-based metasurface that can dynamically control the scattering characteristics and realize mmWave focusing. Furthermore, such a surface can enhance indoor mmWave signals and improve the data rate. A transparent reconfigurable intelligent surface (RIS) focuses the received signals on a particular place indoors, where signal connection to the indoor users is required. An intelligent reflecting surface (IRS) or a conventional decode-forward (DF) relay can be installed in a particular place. This study compares the performance of the IRS connection with the conventional DF relay connection. In particular, the IRS connection is superior to the conventional DF relay connection when extremely high rates are required to minimize the transmit power and maximize the energy efficiency. In addition, when the BS is far away, the IRS connection requires more unit cells to achieve better performance than the conventional DF relay connection.
Indoor Enhancement of mmWave Based on Reconfigurable Intelligent Surface: IRS or DF Relay Connection?
2022-09-01
1516566 byte
Conference paper
Electronic Resource
English