Intelligent Reflecting Surface Enhanced Wireless Network: Joint Active and Passive Beamforming Design

Understand

Intelligent reflecting surface (IRS) is envisioned to have abundant applications in future wireless networks by smartly reconfiguring the signal propagation for performance enhancement.

• Specifically, an IRS consists of a large number of low-cost passive elements each reflecting the incident signal with a certain phase shift to collaboratively achieve beamforming and suppress interference at one or more designated receivers.
• In this paper, we study an IRS-enhanced point-to-point multiple-input single-output (MISO) wireless system where one IRS is deployed to assist in the communication from a multi-antenna access point (AP) to a single-antenna user.
• As a result, the user simultaneously receives the signal sent directly from the AP as well as that reflected by the IRS.