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About this paper
Asifa Zannat, Milad Abolpour, Dani Korpi, Mikko A. Uusitalo, Mikko Valkama, Ertugrul Basar
A space-time coding architecture for Rydberg atomic quantum receiver (RAQR) systems is introduced, achieving full transmit-receive diversity and low-complexity symbol-wise detection. This is accomplished by utilizing real orthogonal designs with a heterodyne RAQR setup, which yields improved bit error rate performance over spatial multiplexing approaches.
Key insights
- A strong reference RF signal in heterodyne RAQRs is crucial for transforming the inherent non-linear, magnitude-based output into a linear, real-valued observation model compatible with orthogonal designs.
- Real orthogonal space-time block codes enable full transmit-receive diversity ($N_t N_r$) in RAQR-MIMO systems, facilitating low-complexity, symbol-wise detection via matched filtering.
- The RAQR-OSTBC scheme offers superior diversity gain at high SNRs compared to spatial multiplexing, while potential coding gain advantages of other methods may exist at low SNRs.
Summary by alphaXiv.
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