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A sinusoidal carrier voltage of frequency 1 MHz and amplitude 100 volts is amplitude modulated by the sinusoidal voltage of frequency 5 kHz producing 50% modulation. Calculate the frequency and amplitude of lower and upper sideband terms.
In this chapter, let us solve a few problems based on the concept of amplitude modulation. Problem 1. A modulating signal m(t) = 10cos(2π × 103t) is amplitude modulated with a carrier signal c(t) = 50cos(2π × 105t). Find the modulation index, the carrier power, and the power required for transmitting AM wave. Solution.
Advantages and Disadvantages of Amplitude Modulation; Solved Problems; NCERT Questions on Amplitude Modulation; What Is Amplitude Modulation? Amplitude modulation, or just AM, is one of the earliest modulation methods that is used in transmitting information over the radio.
- The amplitude of the wave is altered in proportion to the message signal, such as an audio signal, in amplitude modulation. Amplitude modulation is...
- The distinction is in the modulation or alteration of the carrier wave. To add sound information into amplitude modulation radio, the broadcast’s a...
- Because of the increased bandwidth, FM has better sound quality and is the preferable one.
Solutions to Recommended Problems. S14.1. (a) We see in Figure S 14.1-1 that the modulating cosine wave has a peak amplitude of 2K = 2, so that K = 1. At the point in time when the modulating cosine wave is zero, the total signal is A = 2, so K/A = 0.5. Therefore, the signal has 50% modulation. See Figure S14.1-1.
In this video example problems on amplitude modulation have been studied. Important formulas and equation which represents message signal, carrier signal and...
- 25 min
- 31.5K
- For Engineering Reference
Tutorial 4: Amplitude Modulation (Additional Problems) EEL306 Communication Engineering . Q.1: A vestigial sideband modulation system is shown in Fig.1(a). The bandwidth of the message signal m(t) is W and the transfer function of the bandpass filter is shown in the Fig.1(b).
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May 15, 2024 · Amplitude Modulation or AM, is a modulation technology mainly used for radio carrier wave-based message transmission which modifies the carrier wave’s amplitude (signal intensity) in accordance with the message signal, such as an audio signal, i.e., a modulating signal.
