Analytical characterization of the operational diversity order in fading channels Fernández, Santiago Bailón Martínez, J. Alfonso Galeote Cazorla, Juan E. López Martínez, Francisco Javier Asymptotic analysis communication theory diversity order We introduce and characterize the operational diversity order (ODO) in fading channels, as a proxy to the classical notion of diversity order at any arbitrary operational signal-to-noise ratio (SNR). Thanks to this definition, relevant insights are brought up in a number of cases: 1) We quantify that in dominant line-of-sight scenarios an increased diversity order is attainable compared to that achieved asymptotically, even in the single-antenna case; 2) this effect is attenuated, but still visible, in the presence of an additional dominant specular component; 3) the decay slope in Rayleigh product channels increases very slowly, never fully achieving unitary slope for a finite SNR. 2025-02-26T13:02:46Z 2025-02-26T13:02:46Z 2024-12-09 journal article https://hdl.handle.net/10481/102744 10.1109/LCOMM.2024.3512665 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional IEEE