What is VSB filter?

What is VSB filter?

Vestigial Sideband Modulation (VSB) refers to the process where the “vestige” part of a signal is modulated alongside one sideband. A vestigial sideband is a form of amplitude modulation (AM) that encodes data in a signal by altering the amplitude of the carrier frequency.

What is a vestigial sideband?

Vestigial sideband (VSB) is a type of amplitude modulation ( AM ) technique (sometimes called VSB-AM ) that encodes data by varying the amplitude of a single carrier frequency .

Which filter is used in VSB?

▶ VSB signals are generated using standard AM or DSB-SC modulation, then passing modulated signal through a sideband shaping filter. ▶ The signal can be designed so that demodulation uses either standard AM or DSB-SC demodulation, depending on whether a carrier tone is transmitted.

What signal is passed through sideband filter to VSB?

Vestigial Sideband Modulation or VSB Modulation is the process where a part of the signal called as vestige is modulated, along with one sideband. A VSB signal can be plotted as shown in the following figure. Along with the upper sideband, a part of the lower sideband is also being transmitted in this technique.

What is VSB and its application?

VSB modulation is standard for the transmission of TV signals. Because the video signals require a large transmission BW using the techniques like DSB-FC otherwise DSF-SC. This is a type amplitude modulation that is mainly used for the TV broadcast worldwide.

What is SSB and VSB?

Two modulation schemes that are derivatives of DSB modulation are single-sideband (SSB) and vestigial-sideband (VSB) modulation. SSB modulation is produced by filtering out all of one sideband of a DSB signal, while VSB is produced by leaving a vestige of one sideband and all of the other sideband of a DSB signal.

What is the advantages of vestigial sideband?

The main advantage of VSB modulation is the reduction in bandwidth. It is almost as efficient as the SSB . Due to allowance of transmitting a part of lower sideband, the constraint on the filter have been relaxed . So practically, easy to design filters can be used .

Why is vestigial side band necessary in television broadcasting?

Vestigial Sideband Modulation (VSB) is used for video modulation in TV transmission due to the following reasons : Video signal exhibits a large bandwidth and significant low-frequency content which suggests the use of VSB.

What is the meaning of VSB?

abbreviation for. vestigial sideband: a transmission in an amplitude-modulated signal in which one complete sideband is transmitted, but only part of the other.

Where is VSB used?

Usually, VSB technique is used in TV transmission as television signal are extremely low-frequency signals.

What is the difference between SSB and VSB modulation?

Why is vestigial sideband modulation used in TV transmission?

What is the advantage of VSB modulation?

The main advantage of VSB modulation is the reduction in bandwidth. It is almost as efficient as the SSB . Due to allowance of transmitting a part of lower sideband, the constraint on the filter have been relaxed . So practically, easy to design filters can be used.

What is the need for VSB?

VSB technique was introduced to overcome the drawbacks of SSB modulation. As SSB modulation requires accurate frequency response of the filter to transmit only one sideband completely. Thus by using VSB modulation one can simplify the design of the filter to a great extent.

What is vestigial side band modulation why is it used?

This VSB modulation is mostly used in television transmissions. The transmission bandwidth of VSB modulated wave will be the total of message bandwidth and the width of vestigial sideband. Two guard bands are laid on both the sides of this VSB signal so as to avoid the interference of signals.

What is VSB and its main application?