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Q. Explain Source encoding or data compression?
The sequence of binary digits from the source encoder, known as the information sequence, is passed on to the channel encoder. The purpose of the channel encoder is to introduce some redundancy in a controlled manner in the binary information sequence, so that the redundancy can be used at the receiver to overcome the effects of noise and interference encountered in the transmission of the signal through the channel. Thus, redundancy in the information sequence helps the receiver in decoding the desired information sequence, thereby increasing the reliability of the received data and improving the fidelity of the received signal.
The binary sequence at the output of the channel encoder is passed on to the digitalmodulator, which functions as the interface to the communication channel. The primary purpose of the digital modulator is to map the binary information sequence into signal waveforms, since nearly all the communication channels used in practice are capable of transmitting electric signals (waveforms). Because themessage has only two amplitudes in a binary system, themodulation process is known as keying. In amplitude-shift keying (ASK), a carrier's amplitude is shifted or keyed between two levels. Phase-shift keying (PSK) involves keying between two phase angles of the carrier,whereas frequency-shift keying (FSK) consists of shifting a carrier's frequency between two values.Many other forms of modulation are also possible.
A universal shift register can shift in both the left-to-right and right-to-left directions, and it has parallel-load capability. Draw a circuit for such a shift register.
a sensorless brushless DC motor control with back emf (zero crossing point ) technique, using Arduino Microcontroller board control and describe in C. program language.
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For Sign Flag CP ( Call on plus ) CM (Call on minus ) Instruction CP call the subroutine from the specified memory location if sign flag is not set or reset( S=0)
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The IC engine based automobiles have been built and sold for more than 100 years. Predominantly the fuels used for running these IC engines have been petrol and diesel. In recent t
Describe properties of the conducting materials . Conducting materials are classified by low resistivity materials and high resistivity materials. Low resistivity mater
Q. Explain workinf of colpitts oscillator? When the collector supply voltage V cc is switched on, the capacitors C1 and Cz are charged. These capacitors C1 and Cz discharge thr
If an FM signal is given by s FM (t) = 100 cos [2πf c t +100 m(τ ) dτ ] and m(t) is given in figure, sketch the instantaneous frequency as a function of time and determine the pea
Consumer Interaction and Service Standards These KPIs deal along with the customer, internal business procedures and change management. These are significant to give the desir
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