GATE Communication and Optical Instrumentation: Analog and digital communication – Previous Year Questions
7 GATE previous year questions on Analog and digital communication (Communication and Optical Instrumentation, Instrumentation Engineering) with answers and explanations, from every paper.
- GATE 2021 IN Q31 – A tone-modulated AM signal has modulation index 0.6. Its power efficiency is % (one decimal place).
- GATE 2021 IN Q64 – A signal of bandwidth 5 MHz is transmitted by PCM. It is sampled 50% above the Nyquist rate and quantized into 256 levels. Its binary pulse rate is…
- GATE 2022 IN Q16 – A sinusoidal carrier with amplitude A c and frequency f c is amplitude modulated by m(t) with 0<f m f c, giving s(t)=A c[1+m(t)](2 f ct). Which…
- GATE 2022 IN Q26 – Consider 24 voice signals being transmitted without latency using time-division multiplexing. If each signal is sampled at 12 kHz and represented by…
- GATE 2024 IN Q48 – In the ultrasonic measurement system shown, transmitter T sends x(t)=(2 f 1t) V toward an object vibrating as m(t)=0.5(2 f 2t) V. Neglecting other…
- GATE 2026 IN Q27 – An analog speech signal contains signals from 200 Hz to 2400 Hz. It is sampled at 6 kHz and quantized with 512 levels for pulse-code modulation (PCM).…
- GATE 2026 IN Q52 – An amplitude-modulated voltage signal x(t) drives a load of 1\ , where x(t)=K(300 t)+L(240 t)+L(360 t). If the efficiency is 60% and the carrier power…