What is single sideband suppressed carrier modulation?
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 single sideband suppressed?
Single-sideband Suppressed Carrier (SSB-SC) modulation is a technique where the carrier is modulated to produce only a single sideband (either upper or lower) at modulation frequency away from carrier while simultaneously suppressing the carrier, i.e. frequency shifting/conversion.
What is the bandwidth of SSB suppressed carrier AM wave?
2fm.
Bandwidth of SSBSC Wave We know that the DSBSC modulated wave contains two sidebands and its bandwidth is 2fm. Since the SSBSC modulated wave contains only one sideband, its bandwidth is half of the bandwidth of DSBSC modulated wave.
How does SSB calculate bandwidth?
The formula for predicting bandwidth in a SSB system is BW = fm, where fm is the maximum modulating frequency used. By reducing the bandwidth transmitted, you may put double the number of channels (or stations) in the same frequency band.
How are sidebands calculated?
The so-called upper sidebands are those lying above the carrier. Their frequencies are: C+M C+2M C+3M C+4M C+5M …. For example, if C:M is 1:2, that is, the modulator is twice the frequency of the carrier, then the first upper sideband is: C+M = 1+2 = 3.
How is carrier power calculated?
Carrier Power is the power dissipated by a carrier modulating wave during the process of modulation and is represented as Pc = (Ac^2)/2*R or Carrier power = (Amplitude of Carrier Signal^2)/2*Resistance.
How much power can SSB save?
Lots of power saving . This is due to the transmission of only one sideband component . At 100% modulation, the percent power saving is 83.33% .
What is the formula of carrier power?
How do you calculate spacing between sidebands?
Since the spacing of all upper or lower sidebands is M, then the remaining spacing is M – 2C. For the above example (2:5), the spacing is 2×2=4 and 5-4=1. Note that we have to start with C as the fundamental. This will be referred to in the next section as the Normal Form of the Ratio.
How do you calculate power in each sideband?
Explanation: Sideband power i = (m2* Pc)/2 = (Pt – Pc) i.e. 451 – 450 = 1W.
What is the relation between carrier power and sideband power?
Amplitude modulation of a carrier signal normally results in two mirror-image sidebands. The signal components above the carrier frequency constitute the upper sideband (USB), and those below the carrier frequency constitute the lower sideband (LSB).
Whats is SSB?
Services Selection Board (SSB) is an organization that assesses the candidates for becoming officers into the Indian Armed Forces.
What are SSB channels?
Single-Sideband Citizens Band Radios You may have seen some SSB-type CB radios advertised as having 120 channels. This is marketing hype. CB radios in the United States can transmit AM (amplitude modulation) signals, or SSB (single sideband, with suppressed carrier) signals.
What is the formula for carrier frequency?
The satellites continuously broadcast electromagnetic signals in the L-band, which is used for radio communication. The relationship between the wavelength (λ), the speed of light (c), and the frequency (f) is λ = c/f.
How do you calculate carrier power?
What is the power in sidebands?
Therefore, the power in one of the sidebands in SSB SC modulation is 79.36 W. the correct option is (C). Additional information:Modulation factor is the ratio of change in amplitude of the carrier wave after modulation to the amplitude of the carrier wave before modulation.
How is carrier signal power calculated?
If the modulation index μ=1 then the power of AM wave is equal to 1.5 times the carrier power. So, the power required for transmitting an AM wave is 1.5 times the carrier power for a perfect modulation.
What is the criteria for SSB?
The eligibility criteria for the exam is as follows: Candidate must not be more than 35 years of age. Age relaxation of 5 years is applicable for SC/ST candidates. The candidate must be a graduate from any Government recognised University.
What is full from of SSB?
The full form of SSB in the army is the Service Selection Board, which is an organization in which the assessment of candidates willing to become officers in the Indian Armed Forces is done.
What is a single sideband suppressed carrier?
Most often, the carrier is reduced or removed entirely (suppressed), being referred to in full as single sideband suppressed carrier ( SSBSC ). Assuming both sidebands are symmetric, which is the case for a normal AM signal, no information is lost in the process.
How do you suppress the carrier and sideband?
There are various methods of suppressing carrier and one sideband. However, the carrier is suppressed always by using some form of balanced modulator. The following three methods are popularly used for purpose:
What happens to the first-order sideband as the carrier level increases?
The first-order sideband has increased in level until it is now at the same level as the formerly unmodulated carrier.
How to suppress carrier in SSB system?
Suppression of Carrier in SSB System There are various methods of suppressing carrier and one sideband. However, the carrier is suppressed always by using some form of balanced modulator. Suppression of One Sideband in SSB System