Q.What are the advantages of SSB system over conventional DSB system?

A single-sideband (SSB) system transmits only one sideband and suppresses the carrier, whereas the double-sideband (DSB) system sends both sidebands, so SSB uses power and bandwidth far more economically. …

[!TLDR]

Compared with DSB, SSB saves power and halves the bandwidth, while giving lower noise and less fading.

In a conventional double-sideband (DSB) AM system, the carrier and both sidebands are transmitted, but the carrier carries no information and the two sidebands carry the same information twice. A single-sideband (SSB) system removes the carrier and one sideband, transmitting only one sideband.

Advantages of SSB over DSB:

1. Power saving: since the carrier and one redundant sideband are suppressed, all the transmitted power goes into the one information-bearing sideband, so much less transmitter power is needed for the same result.
2. Bandwidth saving: SSB occupies only the bandwidth of one sideband, $f_m$, which is half of the DSB bandwidth $2 f_m$; this lets more channels fit in a given band. …