. A receiver block diagram for a certain analog voice communication system is shown below. The SNR at the output of the LPF must be at least 6 dB for the voice to be understandable. The transmitter and the receiver are separated by a line-of-sight path with a distance of 4 km. The antenna at the transmitter and the receiver have a gain of 33 dB each and operates at a frequency of 2.4 GHz with a 20 MHz bandwidth.
10. A receiver block diagram for a certain analog voice communication system is shown below. The SNR at the output of the LPF must be at least 6 dB for the voice to be understandable. The transmitter and the receiver are separated by a line-of-sight path with a distance of 4 km. The antenna at the transmitter and the receiver have a gain of 33 dB each and operates at a frequency of 2.4 GHz with a 20 MHz bandwidth.
a. How much is the loss in decibels due to free space propagation?
b. If the noise power measured at the antenna is 0.1 pW, what is the noise power at the output of the LPF?
c. What is the minimum received power, Pr, in dBm that will make the voice output at the LPF be understandable for the user?
d. If the transmit power is 5 W, how much is the link budget?
e. What should be the minimum transmit power at the transmitter to achieve a successful communication?
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