Simplified Gsm Link Budget
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Simplified link budget for GSM system Downlink unit Uplink unit Transmitter characteristics Transmitter power 20 W 2W 43.0103 dBm 33.0103 dBm TX antenna gain 17.42531 dBi 0 dBi Note: Gain computed below TX cable loss -4 dB 0 dB TX Body loss 0 dB -2 dB Combiner loss -4 dB 0 dB Transmitter EIRP 52.43561 dBm 31.0103 dBm Receiver characteristics RX antenna gain 0 dBi 17.42531 dBi RX sensitivity 102 dBm 104 dBm RX Cable loss 0 dB -4 dB RX Body loss -2 dB 0 dB Diversity gain 0 dB 3 dB Total receiver gain 100 dB 120.4253 dB System gain 152.4356 dB 151.4356 dB Margins Coverage probability (cell 0.9 0.9 Note: Usually we use cell coverge probability Shadow fading std deviation 6 dB 6 dB Shadow Fading Margin 7.5 dB 7.5 dB Note: Margin computed below Indoor penetration loss 0 dB 0 dB Total margin 7.5 dB 7.5 dB Allowed propagation loss 144.9356 dB 143.9356 dB Shadow Fading Margin (cell edge approach) Given coverage probability on cell e 0.9 1-P(=Q) Argument Shadow fading standard deviation 6 dB 0.5 0 1-P 0.1 0.4 0.25 Closest 1-P in table 0.1 0.3 0.5 Argument (inverse of Q) 1.25 0.22 0.75 Shadow fading margin 7.5 dB 0.17 1 0.1 1.25 0.07 1.5 0.04 1.75 0.023 2 Antenna Gain Horizontal 3dB beam width 65 degrees 0.01 2.25 Horizontal gain 7.493795 dB Number of dipoles 6 Vertical gain (dBd) 7.781513 dBd Vertical gain (dBi) 9.931513 dBi Total antenna gain 17.42531 dBi Range (Okumura-Hata path loss model) Unit Carrier frequency 1800 MHz BS antenna height 25 m MS antenna height 1.5 m Parameter A 46.3 Parameter B 33.9 Parameter C 44.9 MS antenna gain function (large city -0.00092 Path loss exponent 3.574349 Path loss constant 137.3351 dB Downlink range 1.631697 km Uplink range 1.529898 km Cell range 1.529898 km 0 0.5 1 1.5 2 2.5 3 3.5 4 10 -5 10 -4 10 -3 10 -2 10 -1 10 0 x Q(x)
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Transcript of Simplified Gsm Link Budget
Sheet1Simplified link budget for GSM systemDownlinkunitUplinkunitTransmitter characteristicsTransmitter power20W2W43.0102999566dBm33.0102999566dBmTX antenna gain17.425307582dBi0dBiNote: Gain computed belowTX cable loss-4dB0dBTX Body loss0dB-2dBCombiner loss-4dB0dBTransmitter EIRP52.4356075386dBm31.0102999566dBmReceiver characteristicsRX antenna gain0dBi17.425307582dBiRX sensitivity102dBm104dBmRX Cable loss0dB-4dBRX Body loss-2dB0dBDiversity gain0dB3dBTotal receiver gain100dB120.425307582dBSystem gain152.4356075386dB151.4356075386dBMarginsCoverage probability (cell edge)0.90.9Note: Usually we use cell coverge probabilityShadow fading std deviation6dB6dBShadow Fading Margin7.5dB7.5dBNote: Margin computed belowIndoor penetration loss0dB0dBTotal margin7.5dB7.5dBAllowed propagation loss144.9356075386dB143.9356075386dBShadow Fading Margin (cell edge approach)Given coverage probability on cell edge (P)0.91-P(=Q)ArgumentShadow fading standard deviation6dB0.501-P0.10.40.25Closest 1-P in table0.10.30.5Argument (inverse of Q)1.250.220.75Shadow fading margin7.5dB0.1710.11.250.071.50.041.750.0232Antenna GainHorizontal 3dB beam width65degrees0.012.25Horizontal gain7.4937950781dBNumber of dipoles6Vertical gain (dBd)7.7815125038dBdVertical gain (dBi)9.9315125038dBiTotal antenna gain17.425307582dBiRange (Okumura-Hata path loss model)UnitCarrier frequency1800MHzBS antenna height25mMS antenna height1.5mParameter A46.3Parameter B33.9Parameter C44.9MS antenna gain function (large city)-0.000919047Path loss exponent3.5743492943Path loss constant137.3351260501dBDownlink range1.631697261kmUplink range1.5298979556kmCell range1.5298979556km
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