📝 Amplitude Shift Keying during Analog Transmission

Q1. In ASK, a binary '1' is represented by a carrier with amplitude \(A\) while '0' is represented by amplitude 0. If the transmitted amplitude for a '1' is accidentally reduced to \(0.5A\), what is the most likely immediate effect on the receiver's decision?

💡 Difficulty: easy | ✅ Correct: C

Q2. Suppose bandwidth is limited, leading to intersymbol interference (ISI). How does ISI affect ASK performance?

💡 Difficulty: medium | ✅ Correct: C

Q3. In a communication system employing ASK with non-coherent detection, if the noise power spectral density doubles, what is the effect on required signal-to-noise ratio (SNR) to maintain same bit error rate?

💡 Difficulty: hard | ✅ Correct: B