Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Write short note on Quantization?
Quantization: This is first step in PCM. Total amplitude range of the modulating signal is divided into a number of standard levels called quantization levels at equal intervals as demonstrated in figure. These levels are then transmitted in binary code. Thus actual number of these standard levels is a power of two like 4, 8,16,32,64,128 etc. For the sake of simplicity, Figure displays only eight levels, though practical systems use 128 levels or even higher. A new signal is generated by producing, for every sample, a voltage level corresponding to mid-point level of the standard level in which sample falls. So if a range of 0-4 V were divided into four 1V standard levels and signal was sampled when it was 2.8V, quantizer will output a voltage of 2.5 V and hold that level till next sampling time 2.5 V corresponds to midpoint of the third standard level. This leads to a stepped wave form which follows contour of the modulating signal. This discretisation of modulating signal is termed as Quantization. Figurebelow demonstrates modulating signal m (t) and quantized signal (mq (t)) when eight standard levels are used. Quantized wave forms are an approximation to the original signal. Difference between two wave forms amounts to noise added to the signal by quantization process. Error introduced so is called quantization error.
Explain time multiplexed space switching? With a neat diagram illustrate its operation. Ans: Time division switches where an outlet or an inlet corresponded to a single s
Q. Show the Overflow of arithmetic operations? A circumstance takes place because the magnitude of the results of arithmetic operations has become too large for the fixed word
Describe soldering materials and their uses. The process of joining two or more metals is termed as soldering. An alloy of two or more metals of low melting point utilized for
Draw the block diagram of TDM-PCM system. Explain each block. Calculate the bit rate at the output of this system
State and explain three factors upon which the induced electromotive force depends
1) Assume that we are given the continuous-time signal xa (t) = xa1 (t) + xa2 (t) + xa3 (t), where, xa1 (t) = 2 + cos3 (2pf1 t + p 3 ) + 2 cos(2pf2 t), xa2 (t) = 2 cos(2pf3 t)
Explain the difference between a microprocessor and an embedded microcontroller
V-I Characteristics In the normal mode of operation of an IGBT a positive voltage is applied to the collector relative to emitter. When the gate is at zero potential wi
(a) Provide examples of intentional electromagnetic sources and examples of unintentional sources. (b) Describe the process of the formation of lightning. (c) Reduce each of
The project involves comparisons between dierent sampling methods, dierent estimation methods, numerical results using samples selected from a synthetic nite population, and a
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd