Shaping mmWave Wireless Channel via Multi-Beam Design using Reconfigurable Intelligent Surfaces

09/30/2021
by   Nariman Torkzaban, et al.
0

Millimeter-wave (mmWave) communications is considered as a key enabler towards the realization of next-generation wireless networks, due to the abundance of available spectrum at mmWave frequencies. However, mmWave suffers from high free-space path-loss and poor scattering resulting in mostly line-of-sight (LoS) channels which result in a lack of coverage. Reconfigurable intelligent surfaces (RIS), as a new paradigm, have the potential to fill the coverage holes by shaping the wireless channel. In this paper, we propose a novel approach for designing RIS with elements arranged in a uniform planar array (UPA) structure. In what we refer to as multi-beamforming, We propose and design RIS such that the reflected beam comprises multiple disjoint lobes. Moreover, the beams have optimized gain within the desired angular coverage with fairly sharp edges avoiding power leakage to other regions. We provide a closed-form low-complexity solution for the multi-beamforming design. We confirm our theoretical results by numerical analysis.

READ FULL TEXT

page 1

page 6

research
02/08/2022

Codebook Design for Composite Beamforming in Next-generation mmWave Systems

In pursuance of the unused spectrum in higher frequencies, millimeter wa...
research
03/20/2021

Beam-Squint Mitigating for Reconfigurable Intelligent Surface Aided Wideband MmWave Communications

In this paper, we focus our attention on the mitigation of beam squint f...
research
10/12/2022

Nonlocal Reconfigurable Intelligent Surfaces for Wireless Communication: Modeling and Physical Layer Aspects

Delivering wireless ultrahigh-speed access at wider coverage is becoming...
research
10/31/2019

Channel Capacity Optimization Using Reconfigurable Intelligent Surfaces in Indoor mmWave Environments

Indoor millimeter-wave (mmWave) environment channels are typically spars...
research
02/22/2021

Deep Learning for THz Drones with Flying Intelligent Surfaces: Beam and Handoff Prediction

We consider the problem of proactive handoff and beam selection in Terah...
research
02/18/2023

mmWave Coverage Extension Using Reconfigurable Intelligent Surfaces in Indoor Dense Spaces

In this work, we consider the deployment of reconfigurable intelligent s...
research
03/31/2021

Ultra-Reliable Indoor Millimeter Wave Communications using Multiple Artificial Intelligence-Powered Intelligent Surfaces

In this paper, a novel framework for guaranteeing ultra-reliable millime...

Please sign up or login with your details

Forgot password? Click here to reset