Lancho Serrano, AlejandroKoch, Tobias MircoDurisi, Giuseppe2020-02-032020-02-032020-01IEEE Transactions on Information Theory, 66(1), Jan. 2020, Pp. 496-5190018-94481557-9654 (online)https://hdl.handle.net/10016/29598This article concerns the maximum coding rate at which data can be transmitted over a noncoherent, single-antenna, Rayleigh block-fading channel using an error-correcting code of a given blocklength with a block-error probability not exceeding a given value. A high-SNR normal approximation of the maximum coding rate is presented that becomes accurate as the signal-to-noise ratio (SNR) and the number of coherence intervals $L$ over which we code tend to infinity. Numerical analyses suggest that the approximation is accurate at SNR values above 15dB and when the number of coherence intervals is 10 or more.24eng© 2019 IEEE.Channel dispersionFinite blocklengthHigh SNRNormal approximationRayleigh fadingWirelessresearch articleElectrónicaTelecomunicacioneshttps://doi.org/10.1109/TIT.2019.2945782open access4961519IEEE TRANSACTIONS ON INFORMATION THEORY66AR/0000024242