ECE 5520: Digital Communications Lecture Notes Fall 2009

A digital communication system conveys discrete-time, discrete-valued information across a physical channel. Information sources might include audio, video, text, or data. They might be continuous-time (analog) signals (audio, images) and even 1-D or 2-D. Or, they may already be digital (discrete-time, discrete-valued). Our

  Digital

3. The Finite-Difference Time- Domain Method (FDTD)

3. The Finite-Difference Time-Domain Method (FDTD) The Finite-Difference Time-Domain method (FDTD) is today’s one of the most popular technique for the solution of electromagnetic problems. It has been successfully applied to an extremely wide variety of problems, such as scattering from metal objects and

  Methods, Differences, Finite

MatlabTutorial : Root Locus

2.0 Root Locus Design Consider all positive values of k. In the limit as k -> 0, the poles of the closed-loop system are a(s) = 0 or the poles of H(s). In the limit as k -> infinity, the poles of the closed-loop system are b(s) = 0 or the zeros of H(s). No matter what we pick k to be, the closed-loop system must always have n poles, where n is the

  System, Design

Solving the Generalized Poisson Equation Using the Finite ...

Finite-Di erence Method (FDM) James R. Nagel, nageljr@ieee.org Department of Electrical and Computer Engineering University of Utah, Salt Lake City, Utah February 15, 2012 1 Introduction The Poisson equation is a very powerful tool for modeling the behavior of …

  Introduction, Methods, Finite

Introduction to Bode Plot - University of Utah

s TF sss + = ++ Simplify transfer function form: 200*20 (1)100(1) 200(20) 402020 (21)(40) (1)(1)(1)(1) 0.5400.540 ss s TF sss ssss ss ++ + === ++ ++++ Recognize: K = 100 à 20 log10(100) = 40 1 pole at the origin 1 zero at z 1 = 20 2 poles: …

  Plot, Eobd, Toledo bp, Ssss, S sss, Sssss s

Homework #3 Solution - University of Utah

Homework #3 Solution mirror, such as that shown at the right, all µA/V 2, L=1µm, and V A=10V. Widths reference current IREF is 20µA. What 2 and Q 3? -source operation is and ro of Q 2 and Q 3? What is the output 1 . Fall 2010 2. Find the output …

  Solutions, Homework

Chapter 6 Synchronous Sequential Circuits

Please see “portrait orientation” PowerPoint file for Chapter 6. Figure 6.37. Simulation results for the Mealy machine. Figure 6.38. Potential problem with asynchronous inputs to a Mealy FSM. Figure 6.39. Block diagram for the serial adder. Sum = A + B Shift register Shift register Adder FSM Shift register B A a b s

  Chapter, Chapter 6

MET 382 PLC Fundamentals - Ladder fundamentals - Spr …

MET 382 1/14/2008 Ladder Logic Fundamentals 2 PLC Programming Languages In the United States, ladder logic is the most pppopular method used to program a PLC This course will focus primarily on ladder logic programming Other programming methods include: Function block diagrams (FBDs) 3 Structured text (ST)

  Programming, Fundamentals

Homework #1 - University of Utah

Homework #1 Fall 2010 3 4. For the circuit below: (a) Find the resistances looking into node 1, R1; node 2, R2; node 3, R3; and node 4, R4. (b) Find the currents I1, I 2, I 3, and I4 in terms of the input current I. (c) Find the voltage at nodes 1,2,3, and 4, that is V1, V2, V3, and V4 in terms of IR.

  Homework

Introduction to Wireless Communication Systems

[You79]. With the development of highly reliable, miniature, solid-state radio frequency hardware in the 1970s, the wireless communications era was born. The recent exponential growth in cellular radio and personal communication systems throughout the world is directly attributable to new technologies of the 1970s, which are mature today.

  System, Communication, Wireless, Frequency, Wireless communication systems, Communication systems

ICAO HANDBOOK ON RADIO FREQUENCY SPECTRUM …

For aeronautical VHF air-ground voice communication systems, ICAO SARPs specify that the D/U protection ratio for air-ground voice communication systems is 20 dB (signals-in-space). In areas with frequency congestion, a D/U protection ratio of 14 dB may be used. Substituting in formula (16) D/U = 20 gives a separation distance ratio (du/dd) of ...

  System, Communication, Frequency, Communication systems

Introduction to Communication Systems

Distance of communication varies based on wavelength AM Radio (1 MHz) – propagates < 100 miles in day but longer at night Predictable propagation Sky Wave Low MHz 30 MHz Signals reflect from various layers of ionosphere Changes based on time, frequency, sun spots

  System, Communication, Frequency, Communication systems

Communication Systems

Analog Communication Systems 287 7.1 Receivers for CW Modulation (2.6, 4.5, 5.3) 288 Superheterodyne Receivers 288 Direct Conversion Receivers 292 Special-Purpose Receivers 293 Receiver Specifications 294 Scanning Spectrum Analyzers 295 7.2 Multiplexing Systems (4.5, 6.1) 297 Frequency-Division Multiplexing 297 Quadrature-Carrier Multiplexing 302

  System, Communication, Frequency, Communication systems

Chapter 10 Coherent Optical Communication Systems

communication systems achieved several world records, most notably unprece-dented aggregate WDM bit rates approaching 70 Tb/s [23, 24] and a spectral efficiency close to 12 b/s/ Hz [25]. Due to the proliferation of research studies on coherent optical PDM-QPSK and PDM M-QAM communication systems during the last five years, it is difficult to

  System, Communication, Communication systems

Government Gazette Staatskoerant - Amateur Radio

Radio Frequency Spectrum Regulations Schedule PART I - Preliminary 1. Definitions 2 Purpose P T II - Radio Frequency Spectrum Planning 3. Radio Frequency Spectrum Assignment Plans P T ifi - Radio Frequency Spectrum Licence Exemptions 4. Radio Frequency Spectrum Licence Exemption

COMMUNICATION SYSTEMS ENGINEERING

5.4 Comparison of Analog-Modulation Systems 251 5.5 Effects of Transmission Losses and Noise in Analog Communication Systems 252 5.5.1 Characterization of Thermal Noise Sources, 253 5.5.2 Effective Noise Temperature and Noise Figure, 254 5.5.3 Transmission Losses, 257 5.5.4 Repeaters for Signal Transmission, 258 5.6 Further Reading 261 Problems 261

  System, Communication, Communication systems

FM- Frequency Modulation PM - Phase Modulation

1 1 FM- Frequency Modulation PM - Phase Modulation EELE445-14 Lecture 30 DSB-SC, AM, FM and PM [] = ∫−∞ = ± = + = t f p jD m d c jD m t c c c c g t A e g t A e g t A m t jm t

  Frequency