SSB: single side band modulation is a type of modulation used to transmit information, such as an audio signal.it uses transmitter power and bandwidth more efficiently.

SSB(medium 1)---4khz(bandwidth),SSB(wide-2)------6khz(bandwidth)

DSB: Double – side band modulation is the modulation in which modulated output signal contains two side bands of frequencies. The signal content located below the carrier frequency is called lower side band frequency and the signal content located above the carrier frequency is called upper side band frequency.