This set of Analog Communications Multiple Choice Questions & Answers (MCQs ) focuses on “Generation of DSBSC Waves”. 1. LCD uses. Page 1. Lecture Generation of DSBSC waves: balanced modulator, ring modulator. Page 2. Page 3. Double-sideband suppressed-carrier transmission (DSB-SC) is transmission in which In the DSB-SC modulation, unlike in AM, the wave carrier is not transmitted; .. A DSBSC generation and demodulation instrument is described as side.
|Published (Last):||2 June 2014|
|PDF File Size:||11.71 Mb|
|ePub File Size:||16.53 Mb|
|Price:||Free* [*Free Regsitration Required]|
This consists of a message signal multiplied by a carrier signal. Tags Add Tags amplitude modulation analog communication carrier wave communications message signal modulation modulation index.
This is best shown graphically. Other MathWorks country sites are not optimized for visits from your location.
DSB-SC transmission is a special case of oc reduced carrier transmission. Engineering in your pocket Download our mobile app and study on-the-go.
DSB-SC is generated by a mixer. Double Sideband Suppressed Carrier DSBSC is an amplitude modulation technique in which the modulated wave contains both the sidebands along with the suppressed carrier. The diode in the balanced modulator use the nonlinear resistance property for producing modulated signals.
Select the China site in Chinese or English for best site performance. Generatiln its generation using balanced modulator. You are now following this Submission You will see updates in your activity feed You may receive emails, depending on your notification preferences.
It is used for radio data systems.
This resultant signal is then passed through a low pass filter to produce a scaled version of original message signal. The equation above shows that by multiplying the modulated signal by the carrier signal, the result is a scaled version of the original message signal plus a second term.
The name “suppressed carrier” comes about because the carrier wavves component is suppressed—it does not appear in the output signal.
This is apparent when the spectrum of the output signal is viewed.
Double-sideband suppressed-carrier transmission
Retrieved from ” https: Below is a message signal that one may wish to modulate onto a carrier, consisting of a couple of sinusoidal components with frequencies respectively Hz and Hz. Select a Web Site Choose a web site to get translated content where available and see local events and offers. Discover Live Editor Create scripts with code, output, and formatted text in a single executable document. Conventional AM consists of the two sidebands and a carrier where the major transmitted power is concentrated in the carrier which contains no information.
Generationn 20 Jan This file generates the amplitude modulated signal and DSBSC wave for given carrier wave frequency, message signal frequency and modulation Index. Full depth modulation requires carrier re-insertion.
Amplitude Modulation and DSBSC wave generation – File Exchange – MATLAB Central
The mathematical representation of this process is shown below, where the product-to-sum trigonometric identity is used. This page was last edited on 30 Decemberat Learn About Live Editor. The above equation shows that carrier has been cancelled outleaving only two sidebands and the modulating frequencies.
Views Read Edit View history.
Once this signal passes through a low pass filter, the higher frequency component is removed, leaving just the original message. Double-sideband suppressed-carrier transmission DSB-SC is transmission in which frequencies produced by amplitude modulation AM are symmetrically spaced above and below the carrier frequency and the carrier level is reduced to the lowest practical level, ideally being completely suppressed.
In the picture shown below we see four peaks, the two peaks below Hz are the lower sideband LSB and the two peaks above Hz are the upper sideband USBbut there is no peak at the Hz mark, which is the frequency of the suppressed carrier. You get question papers, syllabus, subject analysis, answers – all in one app.
Select a Web Site
The modulating frequencies from the output is eliminated by the tuning of the output transformer, which results in the below equation of the generated DSBSC wave. Demodulation is done by multiplying the DSB-SC signal with the carrier signal just like the modulation process. Based on your location, we recommend that you select: Choose a web site to get translated waes where available and see local events and offers. Download our mobile app and study on-the-go. The DSBSC generation using balanced modulator based on nonlinear resistance characteristics of diode is given below in Fig1.
Comments and Ratings 1. From Wikipedia, the free encyclopedia. The output of the balanced modulator contains two sidebands and sum of the harmonic components.