UWB Transmit PSD Limit (PLIM) -41.3 dBm/MHz Set by regulatory authority Average margin to limit (MBO) 1.7 dB Due to spectral ripple (0.5+ dB) and ~1 dB margin for manufacturing tolerance, etc. Average UWB antenna gain (GUWB) -2 dBi Average gain from small, low cost UWB antenna to arbitrary victim receiver over 360 Average emissions PSD -45 dBm/MHz Average PSD seen in direction of arbitrary victim receiver UWB victim Thermal noise floor (kTB) -114 dBm/MHz Thermal floor (room temperature) UWB victim NF 6 dB Noise figure for the ECMA-368 receiver UWB victim frequency diversity (DFD) 3 dB ECMA UWB system uses 2x band frequency diversity for then encoding of each bit as part of its frequency hopping scheme UWB victim operating margin 5 dB Operating margin for acceptable performance in presence of multipath fading and RF interference 802.16 Effective operating floor -100 dBm/MHz This is the effective allowable interference power for UWB interference susceptibility: level for the ECMA-368 operating receiver (kTB + NFECMA368 + DFD + MOP) Level of wideband UWB emissions that -100 dBm/MHz For 3 dB rise, TG8 UWB emissions in-band can be result in 3 dB rise in ECMA-368 at the as effective operating noise floor same effective operating noise floor for AWN device receiver For 3 dB rise, wideband UWB emissions in-band Path loss from UWB to 55 dB can be at the same level as effective operating receiver (average case) for 3 dB (3) (m) noise floor for AWN device receiver rise in effective operating noise floor For 1 dB rise, wideband UWB emissions in-band Path loss from UWB to 61 dB must be 6 dB below effective operating noise floor receiver (average case) for 1 dB for indoor 802.16 node receiver (6) (m) rise in effective operating noise floor 4: Computation of the acceptable levels of TG8 device emissions for an operating ECMA-368 device Figure 4: Effect on ECMA-368 AWN as a function of separation distance from TG8UWB device. Impact among different IEEE 802.15 UWB PHY Assumptions:
UWB Transmit PSD Limit (PLIM) -41.3 dBm/MHz Set by regulatory authority Average margin to limit (MBO) 1.7 dB Due to spectral ripple (0.5+ dB) and ~1 dB margin for manufacturing tolerance, etc. Average UWB antenna gain (GUWB) -2 dBi Average gain from small, low cost UWB antenna to arbitrary victim receiver over 360 Average emissions PSD -45 dBm/MHz Average PSD seen in direction of arbitrary victim receiver UWB victim Thermal noise floor (kTB) -114 dBm/MHz Thermal floor (room temperature) UWB victim NF 6 dB Noise figure for the ECMA-368 receiver UWB victim frequency diversity (DFD) 3 dB ECMA UWB system uses 2x band frequency diversity for then encoding of each bit as part of its frequency hopping scheme UWB victim operating margin 5 dB Operating margin for acceptable performance in presence of multipath fading and RF interference 802.16 Effective operating floor for UWB interference susceptibility: (kTB + NFECMA368 + DFD + MOP) -100 dBm/MHz This is the effective allowable interference power level for the ECMA-368 operating receiver Level of wideband UWB emissions that result in 3 dB rise in ECMA-368 effective operating noise floor -100 dBm/MHz For 3 dB rise, TG8 UWB emissions in-band can be at the same as effective operating noise floor for AWN device receiver Path loss from UWB to receiver (average case) for 3 dB rise in effective operating noise floor 55 (3) dB (m) For 3 dB rise, wideband UWB emissions in-band can be at the same level as effective operating noise floor for AWN device receiver Path loss from UWB to receiver (average case) for 1 dB rise in effective operating noise floor 61 (6) dB (m) For 1 dB rise, wideband UWB emissions in-band must be 6 dB below effective operating noise floor for indoor 802.16 node receiver 4: Computation of the acceptable levels of TG8 device emissions for an operating ECMA-368 device Figure 4: Effect on ECMA-368 AWN as a function of separation distance from TG8UWB device. Impact among different IEEE 802.15 UWB PHY Assumptions:
15-16-0233-00-0008-tg8-uwb-phy-coexistence-assurance-document-and-analysis.docx