0
Add your answer:
Earn +20 pts
What is a SSBSC signal?
Single Side Band Suppressed Carrier. This is a modification of AM (Amplitude Modulation) that both reduces required transmitter power and signal bandwidth. The carrier is first modulated by the signal the same as in ordinary AM, then is sent through a bandpass filter to remove one sideband and the carrier. To demodulate it and recover the original signal the receiver must reinsert the carrier using a BFO (Beat Frequency Oscillator) and Mixer.
If carrier is suppressed then what is the use of carrier in modulation?
If the carrier is suppressed, then the carrier is only needed at the modulation stage, in order to generate the sideband(s), and it needs to be regenerated at the demodulation stage, in order the recover the original signal. The purpose of suppressing the carrier is to increase the power to the signal-carrying portion of the transmission, by eliminating the "wasted" power in the carrier. This is done at the expense of complexity in the transmitter and receiver. More insight: Actually the added complexity is mainly at the receiver side. The two common methods for the carrier recovery of its receivers are: 1) squaring the DSB-SC signal then dividing by two. 2) the "Costas Loop". The third method, not known by IEEE yet, is "Kerim Loop" that uses a conventional PLL (VCO, phase comparator and an RC filter). It is therefore very simple to be implemented since it doesn't require selective filters of any kind. And it can be integrated to produce low cost AM receivers that recover the baseband signal for any AM modulation index, up to infinity which is the case of no carrier (DSB-SC). These new AM receivers would therefore have also both the features of the synchronous demodulator and the Automatic Frequency Control (AFC) function. Note: Since 30 years, to let "Kerim Loop" concept be known globally, I had to pay a good amount of money first! So, when necessary, I took advantage of it in my private links only.
What are the release dates for Kraft Television Theatre - 1947 Suppressed Desires 2-3?
Kraft Television Theatre - 1947 Suppressed Desires 2-3 was released on: USA: 6 October 1948
What is an Indian baby carrier called?
papoose - Popular carrying device for a small child or baby, The papoose originated in North American and is a native Indian term for Small infant
What is Carrier Corporation's motto?
The motto of Carrier Corporation is 'Turn to the Experts'.
Is carrier signal present at output of double side band suppressed carrier?
No, the carrier signal is not present at the output of double side band suppressed carrier. That is what suppressed carrier means. However, the receiver has enough information to regenerate the carrier if need be. The advantage of suppressed carrier mode is that more power can be deployed to the signal-carrying portion of the modulated carrier.
What difference between amplitude modulation and double sideband suppressed carrier?
Both are forms of AM but in suppressed carrier a filter is used to attenuate the carrier frequency prior to transmission. This is usually done to reduce the total transmitter power consumption. An ordinary AM radio cannot correctly receive suppressed carrier stations, you must have a receiver that replaces the carrier prior to the detector stage.
What is a carrier reinsertion oscillator?
A carrier reinsertion oscillator is an electronic circuit used in a radio receiver that is designed to receive single side band carried suppressed radio transmissions. As suggested by the name, in a single side band carried suppressed signal, the carrier signal is suppressed (not transmitted) to save power and/or bandwidth. Before the single side band carried suppressed signal can be decoded to extract the original audio signal, the carrier must first be reinserted. This must be done accurately, otherwise the recovered audio signal will be unintelligible.
How does double sideband differ from standard AM?
Standard AM already has double sideband. When you talk about double sideband, however, often the meaning is usually "double sideband, suppressed carrier". By suppressing the carrier, you can impute more power into the sidebands, because you are not providing power to the carrier, which accounts for a significant percentage of the total power. Since the sidebands actually contain the signal, you can boost the signal to noise ratio by suppressing the carrier. This comes at a cost, however, in complexity, because you need to regenerate the carrier in order to demodulate the signal. In fact, many systems use single sideband, suppressed carrier, doubling the available power to the sideband containing the signal over double sideband suppressed carrier. This works, again at the cost of receiver and transmitter complexity, because the two sidebands contain the same information.
Difference between dsb fc dsb sc?
DSB-FC means 'dual sideband full carrier' where DSB-SC means 'dual sideband suppressed carrier'.With DSB-SC the carrier wave is suppressed so that almost all the power transmitted is in the sidebands. See the wikipedia page for more info
Which modulation scheme requires the least minimum bandwidth?
Suppressed carrier single sideband amplitude modulation - SCSSBAM.
Why you are suppressing the 2 sidebands of dsbsc?
The sidebands are not suppressed in DSB-SC ... that's where the information is !.The carrier is suppressed, and only the sidebands are transmitted. The mainadvantage of doing that is the fact that the RF power that would otherwise beused for the carrier is then available for the sidebands. This swap typicallyresults in increased range of communication with the same amount of power.
What does a balanced modulator produce?
Please answerin the case of communication , a balanced modulator is used to suppress the carrier from a conventional amplitude modulated signal
Is it possible to suppress both side bands without affecting information?
No. You need at least one sideband in order to carry any information. You can suppress the carrier, one sideband, or the carrier and one sideband, but you would be left with only the carrier if you suppressed both sidebands.
Why analog data have to be modulated onto an analog signal?
For transmission through a radiowave.
What are the Applications of double side suppressed carrier modulation?
Each of the two sidebands can be modulated independently to give two simultaneous communication channels. There would be no point in radiating the carrier, as it carries no information, and would waste transmitter power.
How do you generate double-sideband suppressed carrier?
it can be genrated by multipling of the carrie signal and the message signal that varies the amplitud of the carrire nd supprssd the caarir signal.
