Enhancement of target localization based on angle-of-arrival measurement via quantum sensor networks

Quantum sensor networks with quantum effects, provide a novel way to improve the accuracy of estimated parameter. To tackle the problem of low angle measurement accuracy in the traditional triangulation method, we propose a quantum-enhanced angle-of-arrival estimation scheme and analyze the performance of quantum sensing localization system. Here, we estimate the radio-frequency phase and its higher derivatives via an array of multiple sensors, which can be further extended to localization networks. Combining the enhanced estimation of angle-of-arrival observations with triangulation method, the localization precision is significantly improved. The optimized quantum technique is expected to be applied in the direction finding and positioning of modern phased-array radars and navigation systems.