Question

Propagation measurements indicate that the median path loss at 420 MHz in a midsize city can be modeled with n = 2.9 with a fixed loss (b 0) of 20 dB. Assuming a cell phone receiver sensitivity of -90 dBm, what transmitter power is required to service a circular area of radius 15 km? Now assume that in the same city, the deviation about the median path loss was estimated to be s = 8 dB. Assuming a lognormal shadowing model, how much additional power must be transmitted to cover the same service area with 90% availability at the edge of coverage when shadowing is taken into account?

Answer 1

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