Digital Communication System MCQs

Match List-I with List-II andselect the correct answer by using the codes given below the lists. List-I (Solid state devices)A. PIN diode List-II (Amplification) 1. Microwave amplification B. GaAs MOSFET 2. Low noise microwave generation C. Transferred 3. Electronic tuning electron devices of MW oscillator D. Varactor diode 4. Light wave detection

When the channel is noisy, producing a conditional probability of error p = 0.5; the channel capacity and entropy function would be, respectively,

A TV station works at 300 MHz and radiates 100 kW of power. This signal received at a distance of 200 km will be

A received signal in a Radar system occupies an IF bandwidth of 12 MHz. If the transmitted signal was a pulses carrier of 10 GHz with duty radio 1: 0.5 @ 400 Hz, the received signal power will contain the

A zero memory source generates two messages with probabilities 0.8 and 0.2 These are coded as 1 and 0.2. The code efficiency is

Which one of the following function qualifies to be an autocorrelation function of a reavalued time signal?

The autocorrelation function of white noise is

The probability density function of the envelope of narrow band noise is

The Fourier transform of a Gaussian time pulse is