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Calculate the downlink cell load factor and number of voice users per cell for a WCDMA system with following details.

What is the poll capacity of the cell?

– Information Rate (Ri) = 12.2 kbps

– Chip Rate (Rc) = 3.84 Mcps

– Required Eb/Nt = 4 dB

– Average interference factor due to other cells = 0.5

– Channel activity Factor = 0.65

– Interference Margin = 3 db

This question appears in Mumbai University > Wireless Networks subject

Marks: 10 M

1 Answer
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ηDL(ξ+iDL).Ii=11RcRi.1(EbNt)reqd.1vi

Load –factor per voice user=(0.6+0.5).1384012.2.12.512.10.65=0.0057

Interference margin=3dB=2=11ρ;ρ=0.5

Number of voice users=0.50.005787 per cell

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