Consider a GSM system, which operates at 800 MHz frequency band and the receiver sensitivity as of -113 dBm. Assume that the path loss at the rst meter (Lo) is 31.5 dB and Gt = Gr = 1. Note: 0 dBm is equivalent to 1mW. Answer following questions.

a) What is the wavelength of transmitted signals of this system? b) What is the received power sensitivity Pr with respect to mW? c) What is the ratio of transmitted power Pt and received power Pr in terms of absolute values at the reference point (d=1m)? d) If Free-Space radio model is considered, what is the transmitted power Pt required to achieve the receiver sensitivity in terms of Watts, with the maximum coverage, i.e., at d=30 km? e) If Two-Ray radio model is considered, what is the transmitted power Pt required to achieve the receiver sensitivity in terms of Watts with the maximum coverage, i.e., at d=30 km? f) By comparing the transmission powers for Free-Space and Two-Ray models, what is the observation?

Question 4 (10p) Consider a GSM system, which operates at 800MHz frequency band and the receiver sensitivity as of 113dBm. Assume that the path loss at the first meter (Lo) is 31.5dB and Gt=Gr=1. Note: 0dBm is equivalent to 1mW. Answer following questions. a) What is the wavelength of transmitted signals of this system? b) What is the received power sensitivity Pr with respect to mW ? c) What is the ratio of transmitted power Pt and received power Pr in terms of absolute values at the reference point (d=1m) ? d) If Free-Space radio model is considered, what is the transmitted power Pt required to achieve the receiver sensitivity in terms of Watts, with the maximum coverage, i.e., at d=30km ? e) If Two-Ray radio model is considered, what is the transmitted power Pt required to achieve the receiver sensitivity in terms of Watts with the maximum coverage, i.e., at d=30km ? f) By comparing the transmission powers for Free-Space and Two-Ray models, what is the observation