| Paper ID | SS-1.1 |
| Paper Title |
SPATIAL EQUALIZATION BEFORE RECEPTION: RECONFIGURABLE INTELLIGENT SURFACES FOR MULTI-PATH MITIGATION |
| Authors |
Hongliang Zhang, Princeton University, United States; Lingyang Song, Peking University, China; Zhu Han, University of Houston, United States; H. Vincent Poor, Princeton University, United States |
| Session | SS-1: Beamforming for Intelligent Surfaces |
| Location | Gather.Town |
| Session Time: | Tuesday, 08 June, 13:00 - 13:45 |
| Presentation Time: | Tuesday, 08 June, 13:00 - 13:45 |
| Presentation |
Poster
|
| Topic |
Special Sessions: Beamforming for Intelligent Surfaces |
| IEEE Xplore Open Preview |
Click here to view in IEEE Xplore |
| Virtual Presentation |
Click here to watch in the Virtual Conference |
| Abstract |
Reconfigurable intelligent surfaces (RISs), which enable tunable anomalous reflection, have appeared as a promising method to enhance wireless systems. In this paper, we propose to use an RIS as a spatial equalizer to address the well-known multi-path fading phenomenon. By introducing some controllable paths artificially against the multi-path fading through the RIS, we can perform equalization during the transmission process instead of at the receiver, and thus all the users can share the same equalizer. Unlike the beamforming application of the RIS, which aims to maximize the received energy at receivers, the objective of the equalization application is to reduce the inter-symbol interference (ISI), which makes phase shifts at the RIS different. To this end, we formulate the phase shift optimization problem and propose an iterative algorithm to solve it. Simulation results show that the multi-path fading effect can be eliminated effectively compared to benchmark schemes. |
