Attachment Schedule S GXT

This document pretains to SAT-MOD-20080904-00165 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2008090400165_663003

Forward Link Budget GEN1 Handheld Forward Link: 5 GHz up/2.5 GHz down User Beam Inner Middle Outer Units Uplink Analysis Frequency 5.125 5.125 5.125 GHz Satellite altitude 1414 1414 1414 km GW Elevation 40 40 40 deg Slant Range 1969 1969 1969 km EIRP per user 28.2 26.9 28.7 dBW Path loss -172.5 -172.5 -172.5 dB Polarization loss -0.1 -0.1 -0.1 dB Pointing loss -1.0 -1.0 -1.0 dB Satellite antenna gain 6.37 6.37 6.37 dBi Line loss -2.60 -2.60 -2.60 dB RX power/user @LNA -141.7 -143.0 -141.1 dBW Average user data rate 2400 2400 2400 bps System noise temperature 550 550 550 K Thermal noise density, No -201.2 -201.2 -201.2 dBW/Hz Interference density, Io -196.8 -198.5 -198.2 dBW/Hz Uplink Eb/(No+Io) 19.9 19.9 21.5 dB Nominal transponder gain 122.7 122.7 122.7 dB Downlink Analysis Frequency 2.50 2.50 2.50 GHz TX power per user -14.3 -15.6 -13.7 dBW Line loss -2.1 -2.1 -2.1 Satellite antenna gain 12.69 15.51 17.20 dBi EIRP per user -3.7 -2.1 1.4 dBW Satellite altitude 1414 1414 1414 km User elevation angle 70 50 25 deg Range 1486 1739 2528 km Free space loss -163.8 -165.2 -168.4 dB Polarization & tracking loss -1.0 -1.0 -1.0 dB RX signal/user/satellite -168.5 -168.3 -168.1 dBW User antenna gain 0.51 0.33 0.00 dBi RX signal at antenna output -168.0 -168.0 -168.1 dBW System noise temperature 293.7 293.7 293.7 K Thermal noise density, No -203.9 -203.9 -203.9 dBW/Hz Average data rate 2400 2400 2400 bps Downlink Eb/No 2.1 2.1 2.1 dB Interference per channel -148.70 -148.60 -148.80 dBW Spreading bandwidth 1.23 1.23 1.23 MHz 1/(10*LOG(spreading bandwidth)) -60.9 -60.9 -60.9 dB/Hz Interference Density, Io -209.6 -209.5 -209.7 dBW/Hz Downlink Eb/(No+Io) 1.1 1.1 1.0 dB Coherent combining gain 2.5 2.5 2.5 Overall (up&down) Eb/(No+Io) 3.5 3.5 3.5 dB Required Eb/No w/ power control margin 3.5 3.5 3.5 dB Available margin for propagation effects 16 16 16 dB


Document Created: 2008-09-04 15:44:52
Document Modified: 2008-09-04 15:44:52
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