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):||10 February 2012|
|PDF File Size:||10.99 Mb|
|ePub File Size:||3.5 Mb|
|Price:||Free* [*Free Regsitration Required]|
In the picture shown below we see four peaks, the two peaks below Hz are the lower sideband LSB and the two peaks wvaes Hz are the upper sideband USBbut there is no peak at the Hz mark, which is the frequency of the suppressed carrier.
Double-sideband suppressed-carrier transmission – Wikipedia
Learn About Live Editor. Demodulation is done by multiplying the DSB-SC signal with the carrier signal just like the modulation process. Other MathWorks country sites are not optimized for visits from your location. From Wikipedia, the free encyclopedia. The diode in the balanced modulator use the nonlinear resistance property for producing modulated geberation. It is used wavws radio data systems. The output of the balanced modulator contains two sidebands and sum of the harmonic components.
Based on your location, we recommend that you select: Download our mobile app and study on-the-go.
Double-sideband suppressed-carrier transmission
The modulating frequencies from the output is eliminated generatin the tuning of the output transformer, which results in the below equation of the generated DSBSC wave. The name “suppressed carrier” comes about because the carrier signal component is suppressed—it does not appear in the output signal.
Select the China site in Chinese or English for best site performance. The DSBSC generation using balanced modulator based on nonlinear resistance characteristics of geeration is given below in Fig1. 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.
Retrieved from ” https: The above equation shows that carrier has been cancelled outleaving only two sidebands and the modulating frequencies. This consists of a message signal multiplied by a carrier signal. Engineering in your pocket Download our mobile app and study on-the-go. This file generates the wvaes modulated signal and DSBSC wave for given carrier wave frequency, message signal frequency and modulation Index.
DSB-SC is generated by a mixer. Conventional AM consists of the two wavves and a carrier where the major transmitted power is concentrated in the carrier which contains no information. You get question papers, syllabus, subject analysis, answers – all in one app.
This is apparent when the spectrum of the output signal is viewed. This page was last edited on 30 Decemberat You are now following this Submission You will see updates in your activity feed You may receive emails, depending on your notification preferences. Full depth modulation requires carrier re-insertion.
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. DSB-SC transmission is a special case of double-sideband reduced carrier transmission.
Comments and Ratings 1. Updated 20 Jan The modulated output currents of the two diodes are combined in the center tapped primary of the output transformer, which then gets subtracted. Choose a web site to get translated content where available and see local events and offers.
Amplitude Modulation and DSBSC wave generation – File Exchange – MATLAB Central
This resultant signal is then passed through a low pass filter to produce a scaled version of original message signal.
The mathematical representation of this process is shown below, where the product-to-sum trigonometric identity is used. Views Read Edit View history.
Explain its generation using balanced modulator. This is best shown graphically.