19) Consider a Wi-Fi router that is configured with a channel bandwidth 20 MHz for transmission. If a connected laptop to this Wi-Fi router detects a signal quality of SNR = 15 dB, find the received power. Hint: Assume the communication is free from interference and its operates at room temperatures. Show your work.

Question

19) Consider a Wi-Fi router that is configured with a channel bandwidth 20 MHz for transmission. If a connected laptop to this Wi-Fi router detects a signal quality of SNR = 15 dB, find the received power. Hint: Assume the communication is free from interference and its operates at room temperatures. Show your work.

a) 2.5 µW
b) 2.5 nW
c) 2.5 fW
d) 2.5 pW

Answer 1

d) 2.5 pW

Explanation: The received power (Pr) can be calculated using the following equation: Pr = Pt + Gt + Gr - Lf, where Pt is the transmitted power, Gt is the antenna gain of the transmitter, Gr is the antenna gain of the receiver, and Lf is the free space loss. Assuming Pt = 0 dBm, Gt = Gr = 0 dB, and Lf = 20 dB, the received power can be calculated as follows: Pr = 0 dBm + 0 dB + 0 dB - 20 dB = -20 dBm = 2.5 pW.