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Multiple Signal Classification for Quantum Wireless Sensing with Atomic Receivers

How subspace direction-of-arrival estimation is adapted to atomic (Rydberg-atom) receivers that can only measure signal magnitude. Students learn how magnitude-only measurement breaks conventional MUSIC, how a phase-retrieval step recovers the complex channel and covariance matrix, and how MUSIC is then applied to estimate the angles of arrival of multiple users in a quantum wireless sensing system.