Quantum-MUSIC: Multiple Signal Classification for Quantum Wireless Sensing

This letter proposes a Quantum-MUSIC, the first multiple signal classification (MUSIC) algorithm for quantum wireless sensing of multi-user. Since the atomic receiver for quantum wireless sensing can only measure a magnitude of the received signal, sensing performance degradation of traditional dipole antenna-based signal processing algorithms is inevitable. To overcome this limitation, the proposed algorithm first retrieves the channel matrix and incorporates the MUSIC algorithm, enabling the multi-user wireless sensing with magnitude-only measurement. Simulation results showed that the proposed algorithm outperforms the classical MUSIC algorithm, validating the theoretical potential of quantum wireless sensing and atomic receiver.