By Bernard Sklar
- The transparent, easy-to-understand advent to electronic communications
- Completely up to date assurance of brand new most important applied sciences
- Step-by-step implementation insurance
- Trellis-coded modulation, fading channels, Reed-Solomon codes, encryption, and extra
- Exclusive assurance of maximizing functionality with complex "turbo codes"
"This is a remarkably entire remedy of the sphere, protecting in enormous element modulation, coding (both resource and channel), encryption, a number of entry and unfold spectrum. it will possibly serve either as a superb advent for the graduate pupil with a few historical past in likelihood thought or as a worthy reference for the practising ommunication method engineer. For either groups, the therapy is apparent and good presented."
– Andrew Viterbi, The Viterbi crew
Master each key electronic communications expertise, thought, and method.
Digital Communications, moment version is a completely revised and up-to-date variation of the field's vintage, best-selling advent. With awesome readability, Dr. Bernard Sklar introduces each electronic conversation know-how on the center of cutting-edge instant and web revolutions, supplying a unified constitution and context for figuring out them -- all with no sacrificing mathematical precision.
Sklar starts via introducing the basics of indications, spectra, formatting, and baseband transmission. subsequent, he offers useful insurance of just about each modern modulation, coding, and sign processing method, with numeric examples and step by step implementation advice. assurance comprises:
- Signals and processing steps: from details resource via transmitter, channel, receiver, and data sink
- Key tradeoffs: signal-to-noise ratios, chance of errors, and bandwidth expenditure
- Trellis-coded modulation and Reed-Solomon codes: what is at the back of the mathematics
- Synchronization and unfold spectrum options
- Fading channels: motives, results, and methods for withstanding fading
- The first whole how-to advisor to rapid codes: squeezing greatest functionality out of electronic connections
- Implementing encryption with PGP, the de facto commonplace
Whether you are construction instant structures, xDSL, fiber or coax-based prone, satellite tv for pc networks, or web infrastructure, Sklar offers the speculation and the sensible implementation info you wish. With approximately 500 illustrations and three hundred difficulties and workouts, there is by no means been a quicker solution to grasp complex electronic communications.
CD-ROM INCLUDED
The CD-ROM includes a whole academic model of Elanix' SystemView DSP layout software program, in addition to distinct notes for buying began, a entire DSP instructional, and over 50 extra communications routines.
Read or Download Digital Communications Fundamentals and Applications PDF
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Additional info for Digital Communications Fundamentals and Applications
Example text
Here, the scalar network analyzer is replaced by a vector network analyzer in which the synchronization of all units is maintained internally, and no external synchronization is needed. The operation of the VNA is based on a superheterodyning mechanism rather than simple crystal detection or the thermocouple effect normally used in scalar measurements. Thus, the typical dynamic range of a VNA is much larger than that of a typical scalar network analyzer. 6. Measurement Setup for UWB Channel Characterization Using Vector Network Analyzer.
However, more details lead to more complex computer programs, and require more computational time. Thus, a compromise between the required accuracy and the available computational resources should be made in designing simulators for UWB communication systems. In narrowband wireless communication systems, the information signal modulates a very high frequency sinusoidal carrier; thus, along each propagation path the signal suffers very little distortion because the system elements such as antennas, reflecting walls, diffracting objects in the channel, and so on, have essentially constant electromagnetic properties over the narrow bandwidth of the radiated signal.
Radiation from the electronic circuit of the pulse generator and leakage from the cable connecting the pulse generator to the transmitting antenna, where the signal level is high, may contribute significantly to the background noise level. 1 with a matched termination while the pulse generator is on. This background noise level sets the minimum level below which received signals cannot be detected. Another important issue is the calibration of the measurement setup. The purpose of calibration is to remove the influence of nonideal characteristics of the measurement equipment from the measured data.
