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. Explain Pulse-Code Modulation?
PCM is the simplest and oldest waveform coding scheme for processing an analog signal by sampling, quantizing, and binary encoding. Figure shows a functional block diagram of a PCM system transmitter. In order to guarantee that the message is band-limited to the spectral extent for which the system is designed, a low-pass filter is introduced. The compressor is rather optional for better performance. Let us assume that the PCM signal is transmitted directly over the baseband channel. Corrupted by the noise generated within the receiver, the PCM signal is shown as the input to the PCM reconstruction function in Figure, which depicts a block diagram of functions (including an optional expandor) needed to receive PCM. The operations of the receiver are basically the inverse of those in the transmitter. The first andmost critical receiver operation is to reconstruct the originally transmitted PCM signal as nearly as possible from the noise-contaminated received waveform. The effect of noise is to be minimized through a careful selection of circuit implementation.
The only knowledge required of the receiver to reconstruct the original PCMsignal iswhether the various transmitted bits are 0s and 1s, depending on the voltage levels transmitted, assuming that the receiver is synchronized with the transmitter. The two levels associated with unipolar pulses of amplitude A are 0 and A, whereas those associated with polar pulses (of amplitudes ±A) are A and -A. It is, of course, better for the receiver if the ratio of the pulse-caused voltage to the noise rms voltage is the largest possible at the time of measurement. Figure shows PCM reconstruction circuits for unipolar, polar, and Manchester waveforms.
HOW TO PERFOM AUTO DIALLING USING GSM MODULE
L=0.0053nH, C=15µF find the operating frequency of series LC circuit. What factors decides capacitance ..
Methods of Testing Irrespective of reasons, testing is commonly carried out 1. On site, or 2. In a Meter Testing Station (MTS) accredited as per IS/ISO/IEC 17025.
(a) Identify the semiconductor type in the above diagram. (b) Explain the mechanism of generation of the voltage V AB in the above diagram. (c) An experimental setup like th
Mixed Mode Simulator: The circuit is preprocessed. The test points and waveform markers are located in input and output of the circuit. GND net is set like reference net.
Define Capacitor Construction In its most elementary state a capacitor having of two metal plates separated by a certain distance d, in among the plates lies a dielectric mate
matlab program for verifying maximum power transfer
Q. Explain why equalizing connection are used in lap winding and dummy coils are some time used in wave winding. Sol. For batteies operating in parallel, the circulating c
In continuation of Part-B, the student is required to configure an engine management system for the proposed engine and produce a report including the following: A preamble
Formulars.
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