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

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arxiv 2205.08603 v1 pith:333EYDL7 submitted 2022-05-17 eess.SP cs.ETcs.LG

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

classification eess.SP cs.ETcs.LG
keywords quantumcompressedsensingvariationalchanneldeviceestimationgrant-free
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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