A cellular base station transmits 1W of power at 900 MHz using an omni-directional antenna The base station is located at the center of each cell and the distance to the outer perimeter of the cell is 2km. The nearest interfering co-channel (one that uses the same transmit frequencies) is at a distance of 9.2km. Assume that received signal undergoes fading and the instantaneous received signal power, p, is described by an exponential distribution as f(p) = P(x-(0) exp where the average received power, Pd), is given by where P 10 W and ds 1km. P(d) Pol (a) At what distance is the average received power equal to -20dBm (10) [7] c) In part (b), what is the path loss in dB at the outer perimeter of the cell. (10) [7] (d) What is the average power received (in dBm) from the nearest interfering co-chanel (10) 171 (b) Find the average received power, P. at the outer perimeter of the cell in dBms. (10) [7] (e) 1 there are 6 surrounding interfering channels, each at the same distance from the base sation, find the average signal to interference ratio (in dB) at the base station when the user is at the perimeter of the cell. Assume average signal and interference powers. (10) [7]