https://hal-enac.archives-ouvertes.fr/hal-02987439Garcia Peña, Axel JavierAxel JavierGarcia PeñaENAC - Ecole Nationale de l'Aviation CivileJulien, OlivierOlivierJulienu - Blox AGMacabiau, ChristopheChristopheMacabiauENAC - Ecole Nationale de l'Aviation CivileTELECOM - ENAC - Equipe télécommunications - ENAC - Ecole Nationale de l'Aviation CivileMabilleau, MikaëlMikaëlMabilleauGSA - European GNSS AgencyDurel, PierrePierreDurelGSA - European GNSS AgencyGarcia‐pena, AxelAxelGarcia‐penaMacabiau, CristopheCristopheMacabiauGNSS C/N0 Degradation Model in Presence of Continuous Wave and Pulsed InterferenceHAL CCSD2021Global Navigation Satellite SystemInternational Civil Aviation OrganizationGlobal Navigation Satellite System[INFO.INFO-TS] Computer Science [cs]/Signal and Image ProcessingPorte, Laurence2020-11-03 21:07:192022-03-03 03:15:192020-11-03 21:07:19enJournal articles10.1002/navi.4051In the Global Navigation Satellite System (GNSS) L5/E5a interference environment, RTCA DO-292 proposes a model to compute the ∕ 0 degradation due to the presence of interference signals, such as Distance Measuring Equipment/TACtical Air Navigation (DME/TACAN), Joint Tactical Information Distribution System/Multifunctional Information Distribution System (JTIDS/MIDS), etc., and due to the application of a temporal blanker to mitigate their impact. The ∕ 0 degradation is modeled as a function of the blanker duty cycle, , and the equivalent noise-level contribution of the non-blanked interference,. However, in RTCA DO-292, the computation of these two terms has a reduced accuracy since a general statistical model of signal pulse collisions and an overbounded flat post-blanker pulsed interference signal Power Spectrum Density (PSD) are assumed. In this paper, the limitations of the applied pulse collisions mathematical model are commented, and the use of true post-blanker pulsed interference signal PSD is introduced through the application of the spectral separation coefficient. As a result, more accurate new formulas for and ∕ 0 degradation are derived. The new formulas are verified through simulations for DME/TACAN signals.