In the wireless network shown in Figure 6.21, three transmitters T1, T2 and T3 are communicating with their respective receivers R1, R2 and R3. The path losses (in dB) between the transmitters and...

In the wireless network shown in Figure 6.21, three transmitters T1, T2 and T3 are communicating with their respective receivers R1, R2 and R3. The path losses (in dB) between the transmitters and receivers are given in the figure. The maximum transmitter power is 1 W. The receiver noise power is –120 dBw. The data rate that can be used in each link is related to the SINR in a link according to R = f () = 50log2 (1+) kbit/s. a) Assume that initially transmitters T1 and T2 are transmitting (to receivers R1 and R2). What is the maximal feasible average sum rate in two links? b) Now the link T3–R3 is activated. Is it possible to achieve 100 kbit/s in all three links?