Question Solved1 Answer Consider a cellular system operating at 900 MHz where propagation follows free space path loss with variations from log normal shadowing with σ = 6 dB. Suppose that for acceptable voice quality a signal-to-noise power ratio of 15 dB is required at the mobile. Assume the base station transmits at 1 W and its antenna has a 3 dB gain. There is no antenna gain at the mobile and the receiver noise in the bandwidth of interest is -10 dBm. Find the maximum cell size so that a mobile on the cell boundary will have acceptable voice quality 90% of the time.

R4TF7A The Asker · Electrical Engineering
Consider a cellular system operating at 900 MHz where propagation follows free space path loss with variations from log normal shadowing with σ = 6 dB. Suppose that for acceptable voice quality a signal-to-noise power ratio of 15 dB is required at the mobile. Assume the base station transmits at 1 W and its antenna has a 3 dB gain. There is no antenna gain at the mobile and the receiver noise in the bandwidth of interest is -10 dBm. Find the maximum cell size so that a mobile on the cell boundary will have acceptable voice quality 90% of the time.
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Step 1The given data's are,The free path loss parameters fc=900 MHz, σ=6 dB,The signal noise ratio SNRreq=15 dB,Pt=1 W, gt=3 dB,Pnoise=-10 dBm=-40 dB,Determine the Pr:Pr=SNRreq+Pnoise=15-40=-25 dB Step 2Lets choose a cell of radius d received signal power due to path loss in dB is given by,PPL=10 log10Ptλ4πd2=10 log10PtGtGt&#955 ... See the full answer