Phase-Rotated Symbol Spreading for Scalable Rydberg Atomic-MIMO Detection

2026-01-25

IEEE Wireless Communications Letters

AI Summary

This work addresses the challenge of nonlinearity and incompatibility with conventional detection algorithms in Rydberg atom-based MIMO systems, which hinders their scalability. To overcome this, the authors propose a Phase-Rotated Symbol Spreading (PRSS) scheme that transmits the same symbol over two consecutive time slots with an optimal π/2 phase offset, thereby reconstructing an equivalent linear signal model. This approach maintains spectral efficiency while enabling seamless integration with standard RF-MIMO detection algorithms. The proposed method represents the first successful linearization of Rydberg atom MIMO systems, significantly enhancing both scalability and detection performance. Experimental results demonstrate that PRSS achieves substantial BER improvements—exceeding 2.5 dB under optimal detection and over 10 dB under low-complexity suboptimal detection—compared to existing single-transmission schemes.

Technology Category

• Intelligent Robots: Multi-Robot Systems
• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems
• Multiagent Systems: Agent Communication

Application Category

• Search and Retrieval-Augmented AI: Retrieval-Augmented Generation (RAG) and multi-modal RAG
• Systems and Infrastructure for Web, Mobile and WoT: Experiences and lessons learnt from Web-based algorithms and system deployments
• User Modeling, Personalization and Recommendation: Attacks and countermeasures in recommendation systems

Abstract

Multiple-input multiple-output (MIMO) systems using Rydberg atomic (RA) receivers face significant scalability challenges in signal detection due to their nonlinear signal models. This letter proposes phase-rotated symbol spreading (PRSS), which transmits each symbol across two consecutive time slots with an optimal $\boldsymbol {\pi /2}$ phase offset. PRSS enables reconstruction of an effective linear signal model while maintaining spectral efficiency and facilitating the use of conventional RF-MIMO detection algorithms. Simulation results demonstrate that PRSS achieves greater than 2.5 dB and 10 dB bit error rate improvements compared to current single-transmission methods when employing optimal exhaustive search and low-complexity sub-optimal detection methods, respectively.

Problem

• Rydberg atomic
• MIMO
• nonlinear signal model
• scalability
• signal detection

Innovation

• Phase-Rotated Symbol Spreading
• Rydberg Atomic MIMO
• Nonlinear Signal Model Linearization
• Scalable Detection
• Spectral Efficiency