Question: Suppose a mobile unit is currently present in cell C1 which is served by the base station Bl. Base station B1 transmits power P

Suppose a mobile unit is currently present in cell Cl which is served by the base station Bl. Base station B1

Suppose a mobile unit is currently present in cell C1 which is served by the base station Bl. Base station B1 transmits power P watts at frequency.fi Hz towards the mobile unit located at a distance di from Bl. Two co-channel cells C2 and C3 contribute towards interference at the mobile unit. The base stations in cells C2 and C3 are B2 and B3, respectively, and each base station transmits the power P watts af T, Hz. The distance between the mobile unit and B2 is d2, while that between the mobile unit and B3 is da. Find an expression for Signal-to-Interference Ratio (SIR) at the mobile unit in terms of di, dz, and ds. Assume free space pathloss, isotropic antennas at all base stations and the mobile unit.]

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