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Demodulation of SSB signals also requires the use of a phase-coherent reference. Figure shows the general configuration to demodulate the SSBsignal.Asmall carrier component, which is transmitted along with the message, is inserted. A balanced modulator is used forfrequency conversion of the bandpass signal to low pass or baseband.
Demodulation of VSB signals generally uses a synchronous detector in the configuration of Figure. In VSB, a carrier component is generally transmitted along with the message sidebands. The existence of the carrier component makes it possible to extract a phase-coherent reference for demodulation in a balanced modulator. In some applications, such as television broadcasting, however, a large carrier component is transmitted along with the message in the VSB signal, and in such a case it is possible to recover the message by passing the received signal through an envelope detector.
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Q. What are multistageand single stage networks? Compare strengths and weaknesses of each. OR List the key difference in single stage, two stage and three stage Networks. A
An angle-modulated signal has the form u(t) = 100 cos [2πf c t+4 sin 2πf m t ],where f c =10MHz and f m = 1 kHz. Determine the modulation index β f or β p and the transmitted s
What are the basic modes of operation of 8255? There are two basic modes of operation of 8255, viz. 1. I/O mode. 3. BSR mode. In I/O mode, the 8255 ports work as progr
Q. A four-pole, lap-wound armature has 144 slots with two coil sides per slot, each coil having two turns. If the flux per pole is 20 mWb and the armature rotates at 720 r/min, cal
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Q. Explain about Rotating Machines? Themost widely used electromechanical device is a rotatingmachine, which utilizes themagnetic field to store energy. The main purpose of mos
Find the current through each resistor for the networking below using Mesh Analysis and Nodal Analysis.
Q. For the circuit shown in Figure, develop and execute a PSpice program to obtain the node voltages and the current through each element.
when i/p voltg is grater than battery diode is clse or open
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