Angle modulation problems with solutions pdf

1. What is angle modulation and its types?
2. What is NBFM and WBFM?
3. Why NBFM is similar to AM?
4. What is the difference between spectrum of NBFM and AM?

What is angle modulation and its types?

There are two types. 3.1 Frequency Angle Modulation: Frequency of the carrier wave varies linearly with the message signal in frequency angle modulation. 3.2 Phase Angle Modulation: The phase of the carrier wave varies linearly with the message signal in phase angle modulation.

What is NBFM and WBFM?

FM has infinite bandwidth. Two approximations for FM: ▶ Narrowband approximation (NBFM) ▶ Wideband approximation (WBFM) These depend on whether the FM modulation is larger than the signal bandwidth.

Why NBFM is similar to AM?

an AM signal and NBFM signal is that the algebraic sign of the lower side frequency in the NBFM is reversed. Thus a NBFM signal is essentially requires the same transmission bandwidth (i.e 2 ) as the AM signal.

What is the difference between spectrum of NBFM and AM?

AM radio ranges from 535 to 1705 kilohertz, whereas FM radio ranges in a higher spectrum from 88 to 108 megahertz. For AM radio, stations are possible every 10 kHz and FM stations are possible every 200 kHz.