A carrier signal c(t) = 10cos(2π x 10^6t) is amplitude modulated by a

Back to the 2024 paper

Module 1: Analog Modulation

20247m

A carrier signal c(t) = 10cos(2π x 10^6t) is amplitude modulated by a message signal m(t)= 5 cos(2πx10^3t). Determine the modulation index and sketch the frequency spectrum.

Search Google Ask AI

Worked SolutionAI Assisted

Answer

Given $c=10\cos2\pi10^6t$ , $m=5\cos2\pi10^3t$ , $A_m=5$ , $A_c=10$ , $\mu=A_m/A_c=0.5$ (50%). Envelope $A_c[1+0.5\cos\omega_m t]$ max15 min5. $P_c=50$ W, $P_{SB}=6.25$ W total.

Similar questions

Principles of Communication Engineering If an AM transmitter operates at 1000 kHz carrier frequency with a total power of 10 kW and modulation index of 0.8, determine the power in the carrier and sidebands.20247m Principles of Communication Engineering Explain Angle Modulation with representation of FM and PM signals.20257m Principles of Communication Engineering In amplitude modulation, the total bandwidth required is (i) fm (ii) 2fm (iii) fc + fm (iv) fc - fm20252m Principles of Communication Engineering A frequency-modulated (FM) signal with a frequency deviation of 75 kHz and a modulating frequency of 5 kHz has a modulation index of: (i) 15 (ii) 50 (iii) 75 (iv) 10020242m

PreviousExplain cyclic redundancy check (CRC) and its application in digital communication.NextExplain the concept of Differential Pulse Code Modulation (DPCM) and its advantages over PCM.

Student FinanceWeb Platform

Pocketly — Personal Finance for Students

Keep your hostel and college expenses under control. Track accounts, log spending in seconds, and stay within your monthly budget.

Open Pocketly