What is single sideband technique?

In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation used to transmit information, such as an audio signal, by radio waves. A refinement of amplitude modulation, it uses transmitter power and bandwidth more efficiently.

What is SSB and DSB?

DSB-SC vs SSB-SC | Difference between DSB-SC and SSB-SC. DSB-SC stands for Double SideBand Suppressed Carrier and SSB-SC stands for Single SideBand Suppressed Carrier. Both of these are modulation techiques used in AM(Amplitude Modulated) frequency spectrum.

Why SSB transmission is preferred?

Single sideband modulation, SSB is the main modulation format used for analogue voice transmission for two way radio communication on the HF portion of the radio spectrum. Its efficiency in terms of spectrum and power when compared to other modes means that for many years it has been the most effective option to use.

When was single sideband invented?

1947
With the use of transistors in the mid-1960s, SSB units became small enough to be mounted on the bridge and to be carried by small commercial vessels and yachts. SSB continues in use today. Invented in 1947 at Bell Laboratories, the transistor used semi-conducting material to perform the functions of a vacuum tube.

What is the main disadvantage of SSB?

The disadvantage of SSB modulation are : The generation and reception of SSB signal is complicated ( which we will discuss later in our following post ). The SSB transmitter and receiver need to have an excellent frequency stability .

What are the disadvantages of single sideband transmission?

The disadvantages of single-sideband modulation mainly include the following.

• The discovery & generation process of the single-sideband signal is complex.
• Signal quality will be affected when the transmitter & receiver of SSB have outstanding frequency strength.

Which is better DSB or SSB?

The bandwidth is twice that of message signal and power transmitted is more than that in SSB. SSB is better than DSB.

What is the disadvantage of SSB?

The disadvantage of SSB modulation are : The SSB transmitter and receiver need to have an excellent frequency stability . A slight change in frequency will hamper the quality of transmitted and received signal . Therefore, SSB is not generally used for the transmission of good quality music.

What is the total sideband power if there is 100% modulation?

When the carrier is fully modulated i.e. 100% the amplitude of the modulation is equal to half that of the main carrier, i.e. the sum of the powers of the sidebands is equal to half that of the carrier. This means that each sideband is just a quarter of the total power.

What is the main advantage of SSB over AM?

The advantage of SSB is its narrow bandwidth and higher power efficiency than the other voice modes. The Other Options: The wide bandwidth of FM provides a higher fidelity, while the fidelity of SSB suffers with narrower bandwidth, so option ‘A’ is out.

Which one is better SSB or DSB?

Whereas here, both the side bands are transmitted without the carrier, after modulating the signal. The bandwidth is twice that of message signal and power transmitted is more than that in SSB. SSB is better than DSB.

Why is SSB not used for broadcasting?

When carrier is shifted to bandpass, this one sided bandwidth becomes 9 MHz. This is nearly ten times as large as the total bandwidth occupied by all the channels of the AM radio. Use of SSB modulation would cut this in half but SSB is not used for video signals because of the complexity of the SSB receivers.

What do you need to know about single sideband demodulation?

SSB demodulation basics. As described in previous pages, single sideband is a form of amplitude modulation where the carrier and one sideband have been suppressed or reduced in level. In order to demodulate single sideband, SSB, it is necessary to reintroduce the carrier. To achieve this two main elements are required:

What does single sideband modulation ( SSB ) stand for?

Single sideband modulation or SSB is derived from amplitude modulation (AM) and SSB modulation overcomes a number of the disadvantages of AM.

What kind of detector is used to demodulate SSB transmissions?

SSB, single sideband is easily demodulated, but requires a little more circuitry than is needed for a basic AM envelope detector. To demodulate SSB transmissions a beat frequency oscillator or carrier insertion oscillator is used along with a mixer or product detector.

How is sideband suppression determined in the filter method?

The filter method requires the availability of very sharp filters at the IF and is widely spread in the analog domain, where quartz filters are used. Sideband suppression is determined by the sharpness and attenuation of the filter at the unwanted sideband. 2. The Phasing Method