Name: 7- For a mobile communication system, it is determined from measurements that loss factor is y = 3.2 and the cluster size (N) is 9. When the MS is located at edge of the cell, the CIR is ------------ dB. But, if we adopt sectoring by using a directional antenna with three sectors (each 120 degree), then the CIR is dB. 8. When propagating wave between a transmitter and a receiver is obstructed by a surface with sharp irregular edges, then the wave will face (A-Scattering, B- Diffusion, C- Reflection, D- Diffraction) 9- --------- is a decrease in magnitude of current, voltage, or power of a signal (electrical or optical) in transmission due to distance between the transmitter and the receiver. (A- Fading, B- Doppler effect, C- Attenuation, D- Diffraction) 10- For a vehicle that travels at a velocity of v = 10 m/s, and uses a carrier frequency f = 2GHz (2=0.15m), and it is determined that the coherence bandwidth is Be = 300 KHz. Then, a) The delay spread Td is us. b) The coherence time Tc is ms. crossings per sec, and the fading c) If p =0.25, then the level crossing rate is duration is --------- ms. d) If the symbol bandwidth is Bs = 250 KHz, then the signal is experiencing (A- Frequency-selective & Fast Fading, B- Frequency-selective & Slow Fading, C-Flat & Fast Fading, D-Flat & Slow Fading)