Solved assignment problems in communicaion |online Request

Q1. Consider that a 100-kbps data stream is to be transmitted on a voice-grade telephone circuit (with a bandwidth of 3kHz). Is it possible to approach error-free transmission with a SNR of 10 dB? Justify your answer. If it is not possible, suggest system modifications that might be made.

Q2. Consider a source that produces six messages with probabilities: 1/2, 1/4, 1/8. 1/16, 1/32, 1/32. Determine the average information content in bits of a message.

Q3. A spacecraft at a distance of 381000 Km from the earth’s surface is equipped with a transmitter with a power of 6 watt. The attenuation of the signal between the transmitter and receiver on the earth is given by L = 150 + log(X) dB, where X is the distance measured in kilometres. The noise temperature power at the receiver 58 K. The gain of transmit and receive antennas are 26 dB and 50dB respectively. Calculate:
a) Signal power at the receiver input
b) Noise density (N₀) at the receiver.