CDMA

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CDMA link Budgetfill in GREEN fieldsYELLOW fields calculate automatically

Step 1. Basic Business Plan Details (forecast for each year)

Year Launch 1 2 3 4 5Population 3,886,000 0 0 0 0 0Penetration, % 0.05% 0.00% 0.00% 0.00% 0.00% 0.00%#Customers 1,781 0 0 0 0 0BH Erl/Cust 0.1 0 0 0 0 0Total BH erl 178.1 0.0 0.0 0.0 0.0 0.0

2. Enter building penetration loss and standard deviations from measurements.

Composite Probability Of Service & Required Fade Margin

Dense Urban 20 10 9 13.45 75.0% 9.07Urban 15 9 8 12.04 75.0% 8.12Suburban 15 8 8 11.31 75.0% 7.63Rural 10 8 8 11.31 75.0% 7.63Highway 8 6 8 10.00 75.0% 6.74

Dense Urban 87.4% 9.074 -107.63 -116.7 13.45 75.0% 2.7182818

Urban 88.1% 8.122 -108.58 -116.7 12.04 75.0% 2.7182818

Suburban 88.2% 7.631 -109.07 -116.7 11.31 75.0% 2.7182818

Rural 87.8% 7.631 -109.07 -116.7 11.31 75.0% 2.7182818

Highway 87.4% 6.745 -109.96 -116.7 10.00 75.0% 2.7182818

3. Construct Link Budgets

Reverse Link BudgetTerm or Factor Given Urban Suburban RuralMS TX Power (dbm) (+) 25.14MS antenna gain and body loss (+/-) 0MS EIRP (dBm) (+) 25.14 25.14 25.14 25.14Fade Margin, (dB) (-) -9.07 -8.12 -7.63 -7.63Soft Handoff Gain (dB) (+) 4 4 4 4Ambient Noise (-) -2 -2 -2 -2Receiver Interf. Margin (dB) (-) -3 -3 -3 -3Building Penetration Loss (dB) (-) -20.00 -15.00 -15.00 -10.00BTS RX antenna gain (dBi) (+) 17 17 17 17BTS cable loss (dB) (-) -3 -3 -3 -3

Environment Type

("morphology")

Building Median

Loss, dB

Building Std. Dev,

dB

Outdoor Std. Dev,

dB.

Composite Standard Deviation

Desired Reliability at Cell Edge, %

Fade Margin,

dB.

Fraction of Area FU

Fade Margin

Mean Signal Xbar

Rx Threshold

Xo

Std deviation

Sigma

Cell Edge Probability

Pxoe

(constant)

Dense Urb.

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kTB -113.1BTS noise figure (dB) 6.5

Eb/Nt (dB) 5.9

Processing Gain 21.1BTS RX sensitivity (dBm) (-) -121.8 -121.8 -121.8 -121.8Survivable Uplink Path Loss (dB) (+) 130.9 136.8 137.3 142.3

Forward Link BudgetTerm or Factor Given Urban Suburban RuralBTS TX power (dBm) (+) 48 48 48 48BTS TX power (watts) 63.10 63.10 63.10 63.10% Power for traffic channels 74.0% 74.0% 74.0% 74.0%Number of Traffic Channels in use 19 19 19 19BTS cable loss (dB) (-) -3 -3 -3 -3BTS TX antenna gain (dBi) (+) 17 17 17 17BTS EIRP/traffic channel (dBm) (+,-) 47.9 47.9 47.9 47.9Fade margin (dB) (-) -9.07 -8.12 -7.63 -7.63Receiver interference margin (db) (-) -3 -3 -3 -3ambient Noise (-) -2 -2 -2 -2Building Penetration Loss (dB) (-) -20.0 -15.0 -15.0 -10.0MS antenna gain & body loss (dB) (+,-) 0 0 0 0

kTB (dBm/14.4 KHz.) -113.1Subscriber RX noise figure (dB) 10.5

Eb/Nt (dB) 7Processing Gain 21.1

Subscriber RX sensitivity (dBm) (-) -116.7 -116.7 -116.7 -116.7

Survivable Downlink Path Loss, dB (+) 130.5 136.5 137.0 142.0

Forward/Reverse Link Balance DenseUrban Urban Suburban Rural Highway

Which link is dominant? Reverse Reverse Reverse Reverse ReverseWhat advantage, dB? 0.3 0.3 0.3 0.3 0.3

4. Explore propagation model to figure coverage radius of cell.

Frequency, MHz. 800Subscriber Antenna Height, M 1.5

DenseUrban Urban Suburban Rural Highway

Base Station Antenna Height, M 30 30 30 30 40

DenseUrban Urban Suburban Rural Highway

Environmental Correction, dB -2 -5 -8 -10 -11Coverage Radius, kM 1.71 3.07 7.25 11.46 17.68

Coverage Radius, Miles 1.06 1.91 4.51 7.12 10.99

5. Calculate number of cells required for coverage, ignoring traffic considerations.

Dense Urb.

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DenseUrban Urban Suburban Rural Highway

Covered Area of this type, kM^2 55 450 1700 3400 1400One cell's coverage in this zone, kM^2 9.21 29.69 165.26 412.69 982.36

# Cells required to cover zone 6.0 15.2 10.3 8.2 1.4

6. What is the traffic capacity (in erlangs) of your chosen BTS configuration, year-by-year?

Year Launch 1 2 3 4Erlangs which one BTS can carry 18.3 1 1 1 1

7, 8. What is the total busy-hour erlang traffic on your system? How many BTS are required?

Year Launch 1 2 3 4Total System Busy-Hour Erlangs 178.1 0.0 0.0 0.0 0.0

Capacity of One BTS, erlangs 18.3 1 1 1 1# BTS required to handle all the traffic 9.7 0.0 0.0 0.0 0.0

9. Examine your market, #BTS required for coverage and capacity; estimate totalnumber of BTS required.

Year Launch 1 2 3 4#BTS req'd just to achieve coverage 41.1 41.1 41.1 41.1 41.1

#BTS required just to carry traffic 9.7 0.0 0.0 0.0 0.0

Estimated total #BTS required 42.2 42.2 42.2 42.2 42.2

Scratchpad Areafor propagation model:

800 mHz band format: Okumura-Hata terms69.55 69.55 69.55 69.55 69.55 constant term

75.94483406 75.944834 75.944834 75.944834 75.944834 20 log Fmhz-20.41381574 -20.41382 -20.41382 -20.41382 -22.14047 BTS ht correction factor

-9.639476 -9.639476 -9.639476 suburban or rural correction

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0.000919047 0.000919 0.000919 0.000919 0.000919 Ahm correction factor (mobile ht)125.08193737 125.08194 115.44246 115.44246 113.71581 sum of all excluding distance term, valid if d=1 km

1900 mHz band format: COST231-Hata terms46.3 46.3 46.3 46.3 46.3 constant term

98.414750559 98.414751 98.414751 98.414751 98.414751 20 log Fmhz-20.41381574 -20.41382 -20.41382 -20.41382 -22.14047 BTS ht correction factor

-9.639476 -9.639476 -9.639476 suburban or rural correction0.000919047 0.000919 0.000919 0.000919 0.000919 Ahm correction factor (mobile ht)

124.30185387 124.30185 114.66238 114.66238 112.93572 sum of all terms excluding distance term, valid if d=1 km

dense urban urban suburban rural highway122.30185387 119.30185 106.66238 104.66238 101.93572 total attenuation not including distance term

130.5 136.5 137.0 142.0 144.9 worst-direction available link budget excess to treat as allowable propagation loss8.2 17.2 30.3 37.3 42.9 delta DB: path loss at one km is this much lower than max permissible path loss

35.224855782 35.224856 35.224856 35.224856 34.406507 slope (db/decade) of signal decay as function of distance at this BTS height1.71 3.07 7.25 11.46 17.68 distance, km. to consume all available excess signal

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4 87.4%4 88.1%

3.8 88.2%3.6 87.8%

3 87.4%

4.0 ### ###

4.0 ### ###

3.8 ### ###

3.6 ### ###

3.0 ### ###

Highway Formula

25.14 A-6.74 B

4 C-2 C1-3 D

-8.00 E17 F-3 G

Path loss Exponent

Area Reliability %

Prop Loss Coeffic. N

Calc Const. A

Calc Const. B

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HIJ

L-121.8 H+I+J-L145.2

Highway Formula48

63.1074.0%

19-317

47.9 A-6.74 B

-3 C-2 C1

-8.0 D0 E

-116.7 F

144.9

A+B+C+C1+D+E+F+G-(H+I+J-

L)

A+B+C+C1+D+E-F

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Total# Cells

Requiredfor System

41.1

51

50.0

10.0

541.1

0.0

42.2

-9.639476 -134.479152

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sum of all excluding distance term, valid if d=1 km

-7.468919sum of all terms excluding distance term, valid if d=1 km

total attenuation not including distance termworst-direction available link budget excess to treat as allowable propagation lossdelta DB: path loss at one km is this much lower than max permissible path lossslope (db/decade) of signal decay as function of distance at this BTS heightdistance, km. to consume all available excess signal