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

TL;DR

This paper introduces phase-rotated symbol spreading (PRSS) for Rydberg atomic-MIMO systems, transforming nonlinear detection into a linear model, thereby improving detection performance and spectral efficiency.

Contribution

The paper proposes PRSS, a novel transmission scheme that enables linear modeling and enhances detection in Rydberg atomic-MIMO systems.

Findings

PRSS achieves over 2.5 dB BER improvement with optimal detection.

PRSS achieves over 10 dB BER improvement with sub-optimal detection.

PRSS maintains spectral efficiency and compatibility with existing algorithms.

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 {\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.