关键词: 量子照射, 目标定位, 纠缠态, 压缩因子, GDOP

Abstract: Compared with classical schemes, the quantum measurement and positioning system with compression or entanglement characteristics provide sensitivity advantages in time difference of arrival and azimuth estimation. In order to solve a more diverse problem of passive target detection and localization, we construct a single station time delay and azimuth target positioning system based on quantum illumination model using quantum squeezed and entangled sensing system. The estimation methods of precise time difference of arrival and azimuth measurement for radio frequency signals are studied, and the potential of quantum target spatial positioning based on time difference and azimuth observation has been explored. Taking planar target localization as an example, we demonstrate the quantum superiority of target spatial localization task and the influence of transmission coefficient and squeezed factor on the GDOP value of spatial target localization accuracy. The results show that the quantum positioning provides a 28.8% improvement in ranging accuracy and a 63.3% improvement in azimuth measurement accuracy compared to classical schemes in two-dimensional space, with a comprehensive positioning accuracy improvement of about 44%.

Key words: quantum illumination, target localization, entangled state, squeezed factor, GDOP