Finding Globally Optimal Configuration of Active RIS in Linear Time
Heedong Do, Namyoon Lee
TL;DR
This paper introduces a linear-time algorithm for determining the globally optimal configuration of active RIS in single-antenna systems, including a closed-form solution for specific conditions, advancing efficient wireless communication design.
Contribution
It provides the first linear-time algorithm for optimal active RIS configuration and derives a closed-form expression for cases without direct links.
Findings
Optimal configuration computed in linear time
Closed-form expression for no direct link scenario
Enhanced understanding of active RIS behavior
Abstract
This paper presents an algorithm for finding the optimal configuration of active reconfigurable intelligent surface (RIS) when both transmitter and receiver are equipped with a single antenna each. The resultant configuration is globally optimal and it takes linear time for the computation. Moreover, there is a closed-form expression for the optimal configuration when the direct link vanishes, which enables further analysis.
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Taxonomy
TopicsAdvanced Wireless Communication Technologies · Satellite Communication Systems · Advanced Antenna and Metasurface Technologies