IT subject - Wirless Access Technologies

Please help to answers the following red circles for four questions by steps by steps as below :

If you see the pictures not clear, please right click to download/save the picture in computer.

thank you!

Q2 (a) You have a twin of 5.2 GHz wireless bridges, and use them on a 1000-meter point-to point radio link between the two buildings. The transmitter power is 0.5 W. You are using a 3.5 dB loss coaxial cable connecting the transmitter to Yagi antenna with gain of 12.5 dBiThe same type of coaxial cable and antenna are applied at the receiving end. (i)) Determine the free space loss in dB. [3 marks] (ii) ) Determine the Effective Isotropic Radiated Power (EIRP) in dBm. [2 marks] (iii) ) Determine the received power on one end in dBm if the overall path propagation loss is 130 dB. [3 marks) (iv) Given that the sensitivity of the bridge is -93 dBm, determine the allowable radio link margin for the association between the two bridges. [2 marks] (V) ) In order to extend the coverage, what kind of antennas should be used in the point-to-point radio link? Explain your answer. [2 marks] (b) (i) Draw a diagram to show reflection for electromagnetic waves hit a building which is somewhere between these two sites. [2 marks] (ii) How does the size of an obstacle determine the reflection in propagation? [2 marks] (C) With the aid of diagrams, describe the effect of multipath on pulse spreading. [4 marks]