CDMA link Budget

CDMACDMA link Budgetfill in GREEN fieldsYELLOW fields calculate automaticallyStep 1. Basic Business Plan Details (forecast for each year)YearLaunch12345Population3,886,00000000Penetration, %0.05%0.00%0.00%0.00%0.00%0.00%#Customers1,78100000BH Erl/Cust0.100000Total BH erl178.10.00.00.00.00.02. Enter building penetration loss and standard deviations from measurements.Composite Probability Of Service & Required Fade MarginEnvironment Type ("morphology")Building Median Loss, dBBuilding Std. Dev, dBOutdoor Std. Dev, dB.Composite Standard DeviationDesired Reliability at Cell Edge, %Fade Margin, dB.Path loss ExponentArea Reliability %Dense Urban2010913.4575.0%9.07487.4%Urban159812.0475.0%8.12488.1%Suburban158811.3175.0%7.633.888.2%Rural108811.3175.0%7.633.687.8%Highway86810.0075.0%6.74387.4%Fraction of Area FUFade MarginMean Signal XbarRx Threshold XoStd deviation SigmaCell Edge Probability Pxoe (constant)Prop Loss Coeffic. NCalc Const. ACalc Const. BDense Urban87.4%9.074-107.63-116.713.4575.0%2.71828182844.0-0.4769362760.913040448Urban88.1%8.122-108.58-116.712.0475.0%2.71828182844.0-0.4769362761.020106004Suburban88.2%7.631-109.07-116.711.3175.0%2.71828182843.8-0.4769362761.031449394Rural87.8%7.631-109.07-116.711.3175.0%2.71828182843.6-0.4769362760.977162584Highway87.4%6.745-109.96-116.710.0075.0%2.71828182843.0-0.4769362760.9212777203. Construct Link BudgetsReverse Link BudgetTerm or FactorGivenDense Urb.UrbanSuburbanRuralHighwayFormulaMS TX Power (dbm) (+)25.14MS antenna gain and body loss (+/-)0MS EIRP (dBm) (+)25.1425.1425.1425.1425.14AFade Margin, (dB) (-)-9.07-8.12-7.63-7.63-6.74BSoft Handoff Gain (dB) (+)44444CAmbient Noise (-)-2-2-2-2-2C1Receiver Interf. Margin (dB) (-)-3-3-3-3-3DBuilding Penetration Loss (dB) (-)-20.00-15.00-15.00-10.00-8.00EBTS RX antenna gain (dBi) (+)1717171717FBTS cable loss (dB) (-)-3-3-3-3-3GkTB-113.1HBTS noise figure (dB)6.5IEb/Nt (dB)5.9JProcessing Gain21.1LBTS RX sensitivity (dBm) (-)-121.8-121.8-121.8-121.8-121.8H+I+J-LSurvivable Uplink Path Loss (dB) (+)130.9136.8137.3142.3145.2A+B+C+C1+D+E+F+G-(H+I+J-L)Forward Link BudgetTerm or FactorGivenDense Urb.UrbanSuburbanRuralHighwayFormulaBTS TX power (dBm) (+)4848484848BTS TX power (watts)63.1063.1063.1063.1063.10% Power for traffic channels74.0%74.0%74.0%74.0%74.0%Number of Traffic Channels in use1919191919BTS cable loss (dB) (-)-3-3-3-3-3BTS TX antenna gain (dBi) (+)1717171717BTS EIRP/traffic channel (dBm) (+,-)47.947.947.947.947.9AFade margin (dB) (-)-9.07-8.12-7.63-7.63-6.74BReceiver interference margin (db) (-)-3-3-3-3-3Cambient Noise (-)-2-2-2-2-2C1Building Penetration Loss (dB) (-)-20.0-15.0-15.0-10.0-8.0DMS antenna gain & body loss (dB) (+,-)00000EkTB (dBm/14.4 KHz.)-113.1Subscriber RX noise figure (dB)10.5Eb/Nt (dB)7Processing Gain21.1Subscriber RX sensitivity (dBm) (-)-116.7-116.7-116.7-116.7-116.7FSurvivable Downlink Path Loss, dB (+)130.5136.5137.0142.0144.9A+B+C+C1+D+E-FForward/Reverse Link BalanceDenseUrbanUrbanSuburbanRuralHighwayWhich link is dominant?ReverseReverseReverseReverseReverseWhat advantage, dB?0.30.30.30.30.34. Explore propagation model to figure coverage radius of cell.Frequency, MHz.800Subscriber Antenna Height, M1.5DenseUrbanUrbanSuburbanRuralHighwayBase Station Antenna Height, M3030303040DenseUrbanUrbanSuburbanRuralHighwayEnvironmental Correction, dB-2-5-8-10-11Coverage Radius, kM1.713.077.2511.4617.68Coverage Radius, Miles1.061.914.517.1210.995. Calculate number of cells required for coverage, ignoring traffic considerations.DenseTotalUrbanUrbanSuburbanRuralHighway# CellsCovered Area of this type, kM^255450170034001400RequiredOne cell's coverage in this zone, kM^29.2129.69165.26412.69982.36for System# Cells required to cover zone6.015.210.38.21.441.16. What is the traffic capacity (in erlangs) of your chosen BTS configuration, year-by-year?YearLaunch12345Erlangs which one BTS can carry18.3111117, 8. What is the total busy-hour erlang traffic on your system? How many BTS are required?YearLaunch12345Total System Busy-Hour Erlangs178.10.00.00.00.00.0Capacity of One BTS, erlangs18.311111# BTS required to handle all the traffic9.70.00.00.00.00.09. Examine your market, #BTS required for coverage and capacity; estimate totalnumber of BTS required.YearLaunch12345#BTS req'd just to achieve coverage41.141.141.141.141.141.1#BTS required just to carry traffic9.70.00.00.00.00.0Estimated total #BTS required42.242.242.242.242.242.2Scratchpad Areafor propagation model:800 mHz band format:Okumura-Hata terms69.5569.5569.5569.5569.55constant term75.944834059775.944834059775.944834059775.944834059775.944834059720 log Fmhz-20.4138157402-20.4138157402-20.4138157402-20.4138157402-22.1404690802BTS ht correction factor-9.639475719-9.639475719-9.639475719suburban or rural correction-9.639475719-134.47915190050.0009190470.0009190470.0009190470.0009190470.000919047Ahm correction factor (mobile ht)125.0819373664125.0819373664115.4424616475115.4424616475113.7158083075sum of all excluding distance term, valid if d=1 km1900 mHz band format:COST231-Hata terms46.346.346.346.346.3constant term98.41475055998.41475055998.41475055998.41475055998.41475055920 log Fmhz-20.4138157402-20.4138157402-20.4138157402-20.4138157402-22.1404690802BTS ht correction factor-9.639475719-9.639475719-9.639475719suburban or rural correction0.0009190470.0009190470.0009190470.0009190470.000919047Ahm correction factor (mobile ht)-7.4689188582124.3018538658124.3018538658114.6623781468114.6623781468112.9357248069sum of all terms excluding distance term, valid if d=1 kmdense urbanurbansuburbanruralhighway122.3018538658119.3018538658106.6623781468104.6623781468101.9357248069total attenuation not including distance term130.5136.5137.0142.0144.9worst-direction available link budget excess to treat as allowable propagation loss8.217.230.337.342.9delta DB: path loss at one km is this much lower than max permissible path loss35.224855781635.224855781635.224855781635.224855781634.4065070568slope (db/decade) of signal decay as function of distance at this BTS height1.713.077.2511.4617.68distance, km. to consume all available excess signal

0 dB for 1.9 GHz2 dB for 800 MHz0 dB for 1.9 GHz2 dB for 800 MHz23 dBm EIRP for 1.9MHz25.14 dBm EIRP for 800 MHz21.1 -> 8Kbps19.3 -> 13Kbps21.1 -> 8Kbps19.3 -> 13Kbps