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Lett."],"published-print":{"date-parts":[[2026,7,15]]},"abstract":"<jats:p>Image interference is a common issue in heterodyne reception structures, introducing co-channel interference and degrading performance. Although the heterodyne structure significantly improves the sensitivity of the Rydberg-atom-based receiver, the presence of image interference limits its practical application. In this work, we design a quadrature reception structure with a Rydberg-atom-based receiver and experimentally evaluate its performance. This architecture provides orthogonal receiving channels, down-converting input signals into complex form and enabling the separation of image-frequency components. Experiments confirm that conventional heterodyne reception suffers from image interference, while our quadrature structure effectively cancels it after channel compensation. 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