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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Robust Transceiver Design for IRS-Assisted Cascaded MIMO Communication Systems.

Hossein Esmaeili¹, Ali Kariminezhad², Aydin Sezgin¹

¹Institute of Digital Communication Systems, Ruhr University Bochum, 44801 Bochum, Germany.

Sensors (Basel, Switzerland)

|September 9, 2022

Summary

Intelligent reconfigurable surfaces (IRSs) combined with decode-and-forward relays enhance wireless network reliability. Robust transceiver design against residual self-interference (RSI) optimizes throughput, offering significant performance gains.

Keywords:

IRS MIMO decode-and-forward robust design worst case

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Area of Science:

Wireless communication systems
Information theory
Optimization theory

Background:

Intelligent reconfigurable surfaces (IRSs) offer passive solutions for wireless networks, but traditional relays excel in reliability and throughput.
Future wireless networks face challenges in providing reliable communication.

Purpose of the Study:

To investigate a robust transceiver design using IRS and decode-and-forward relays to enhance reliability in wireless networks.
To address residual self-interference (RSI) and maximize throughput under channel uncertainty.

Main Methods:

Developed a robust transceiver design optimizing throughput under self-interference channel uncertainty constraints.
Proposed a novel mathematical method to establish a lower bound for IRS performance.
Utilized majorization theory and singular value decomposition (SVD) for optimal transmitter and relay response to worst-case RSI.
Implemented a multi-level water-filling algorithm for iterative, locally optimal solutions.

Main Results:

IRS effectiveness is contingent on element count relative to interference channel size in worst-case scenarios.
The proposed algorithm outperforms state-of-the-art methods in time complexity and robustness.
Achievable rates increased twofold for small antenna arrays and sixfold for large antenna arrays.

Conclusions:

The combined IRS and relay system effectively addresses reliability challenges in future wireless networks.
The proposed robust transceiver design and optimization algorithms provide significant throughput improvements.
The study establishes a benchmark for IRS performance and offers practical solutions for enhancing wireless communication systems.