Variational Quantum Compressed Sensing for Joint User and Channel State Acquisition in Grant-Free Device Access Systems

• URL: http://arxiv.org/abs/2205.08603v1
• Date: Tue, 17 May 2022 19:47:31 GMT
• Title: Variational Quantum Compressed Sensing for Joint User and Channel State Acquisition in Grant-Free Device Access Systems
• Authors: Bryan Liu, Toshiaki Koike-Akino, Ye Wang, Kieran Parsons
• Abstract summary: We propose a variational quantum circuit (VQC) design as a new denoising solution. For a practical grant-free communications system having correlated device activities, variational quantum parameters for Pauli rotation gates are optimized. Numerical results show that the VQC method can outperform modern compressed sensing techniques using an element-wise denoiser.
• Score: 16.367501048180472
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper introduces a new quantum computing framework integrated with a two-step compressed sensing technique, applied to a joint channel estimation and user identification problem. We propose a variational quantum circuit (VQC) design as a new denoising solution. For a practical grant-free communications system having correlated device activities, variational quantum parameters for Pauli rotation gates in the proposed VQC system are optimized to facilitate to the non-linear estimation. Numerical results show that the VQC method can outperform modern compressed sensing techniques using an element-wise denoiser.

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