With the aid of the diagram explain the following forms of amplitude modulation. DSB-SC SSB-TS SBB-SC

Double-Sideband Suppressed Carrier (DSB-SC)

- The carrier wave is completely removed by a balanced modulator.
- Both sidebands are present and have equal amplitude.
- The bandwidth is twice the message bandwidth.

Single-Sideband Transmitted Suppressed (SSB-TS)

- The carrier wave is completely removed by a single-sideband modulator.
- Only one sideband is transmitted, while the other is suppressed.
- The bandwidth is half that of DSB-SC.

Single-Sideband Suppressed Carrier (SSB-SC)

- The carrier wave is suppressed in the modulator, and only one sideband is transmitted.
- The bandwidth is half that of SSB-TS.

Amplitude Modulation Diagram

[Image of amplitude modulation diagram]

The frequency spectrum of the modulated signal is shown on the graph. The frequency of the carrier wave is represented by "f". The frequency of the message signal is represented by "m". The lower sideband is represented by "LSB", and the upper sideband is represented by "USB".

DSB-SC:
- Both LSB and USB are present.
- The bandwidth is from (f - m) to (f + m).

SSB-TS:
- Only one sideband (either LSB or USB) is present.
- The bandwidth is from (f - m) to f or from f to (f + m).

SSB-SC:
- Only one sideband is present.
- No carrier wave is present.
- The bandwidth is from (f - m) to f or from f to (f + m).