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Discrete-Signal Analysis and Design

ISBN: 978-0-470-18777-7
174 pages
February 2008
Discrete-Signal Analysis and Design (0470187778) cover image
A clear, step-by-step approach to practical uses of discrete-signal analysis and design, especially for communications and radio engineers

This book provides an introduction to discrete-time and discrete-frequency signal processing, which is rapidly becoming an important, modern way to design and analyze electronics projects of all kinds. It presents discrete-signal processing concepts from the perspective of an experienced electronics or radio engineer, which is especially meaningful for practicing engineers, technicians, and students. The approach is almost entirely mathematical, but at a level that is suitable for undergraduate curriculums and also for independent, at-home study using a personal computer.

Coverage includes:

  • First principles, including the Discrete Fourier Transform (DFT)

  • Sine, cosine, and theta

  • Spectral leakage and aliasing

  • Smoothing and windowing

  • Multiplication and convolution

  • Probability and correlation

  • Power spectrum

  • Hilbert transform

The accompanying CD-ROM includes Mathcad® v.14 Academic Edition, which is reproduced with permission and has no time limitation for use, providing users with a sophisticated and world-famous tool for a wide range of applied mathematics capabilities.

Discrete-Signal Analysis and Design is written in an easy-to-follow, conversational style and supplies readers with a solid foundation for more advanced literature and software. It employs occasional re-examination and reinforcement of particularly important concepts, and each chapter contains self-study examples and full-page Mathcad® Worksheets, worked-out and fully explained.

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Introduction.

1. Define the goals of the book.

2. Define discrete signals.

3. The advantages of discrete-signal analysis and design.

4. Describe the DFT and IDFT.

5. Discuss the Mathcad program.

6. Discuss MATLAB and less expensive approaches.

7. Discuss Multisim program from National Instruments Co.

8. Discuss the Mathtype program.

9. Mention LabVIEW.

10. Mention Search Engines.

11. Discuss the personal productivity software capability.

Chapter 1: First Principles

1. Sequence structure in time domain and frequency domain.

2. Two-sided time and frequency.

3. The discrete Fourier transform.

4. The inverse discrete Fourier transform.

5. Frequency and time scaling.

6. Number of samples needed.

7. Complex frequency domain sequences. The phasor concept.

8. Time x(n) vs frequency X(k).

Chapter 2: Sine, Cosine and Theta.

1. One-sided sequences.

2. Combinations of two-sided phasors

3. Time and spectrum transformations.

4. Transforming two-sided phasor sequences into one-sided sine, cosine, Θ.

5. Example 2-1, nonlinear amplifier distortion and square law modulator.

6. Example 2-2, analysis of the ramp function.

Chapter 3: Spectral Leakage and Aliasing.

1. Spectral leakage. Non-integer values of time and frequency.

2. Scaling of frequency reduces leakage. Example 3-1.

3. Aliasing in the two-sided frequency domain.

4. Aliasing in the positive frequency domain.

5. Example 3-2. Analysis of frequency domain aliasing.

6. Time domain aliasing.

Chapter 4: Smoothing and Windowing.

1. Smoothing the rectangular window, without noise and with noise.

2. Smoothed sequences near the beginning and end.

3. Signal to noise ratio of a smoothed sequence.

4. Three-point smoothing and seven point smoothing.

5. Windowing in the time and frequency domains.

6. The rectangular window (review Ch. 3).

7. The Hamming Window.

8. The Hanning (Hann) Window.

9. Relative merits of the three windows.

10. Lobe amplitudes of the three types of windows.

11. Behavior of windows near k = 1 and 2.

12. Scaling the windows for improved frequency resolution.

Chapter 5: Multiplication and Convolution

1. Sequence multiplication.

2. Polynomial multiplication.

3. Discrete Convolution basic equation.

4. Relating convolution to polynomial multiplication.

5. The “fold and slide” concept.

6. Circular discrete convolution (try to avoid).

7. Sequence time and phase shift.

8. The DFT and IDFT of discrete convolution.

9. Fig 5-6. Compare convolution and multiplication.

10. De-convolution.

Chapter 6: Probability and Correlation

1. Expected value of noiseless sequence.

2. Include some additive noise.

3. Envelope detection of noisy sequence.

4. Power of noiseless sequence.

5. Power of noisy sequence.

6. Sequence averaging.

7. Variance (AC component).

8. Gaussian (normal) distribution.

9. Cumulative distribution (CDF).

10. Autocorrelation of a sequence.

11. Cross correlation of two sequences.

12. Auto-covariance.

13. Cross-covariance.

14. Correlation coefficient.

Chapter 7: Power spectrum.

1. Finding the power spectrum using Eq 7-1.

2. Two-side phasor spectrum, one-side power spectrum.

3. Example 7-1.  See Fig 7-2.

4. Random Gaussian noise spectrum.

5. Measuring power spectrum.

6. Spectrum analyzer example.

7. Wiener-Kintchine theorem.

8. System power transfer Eq 7-6.

9. Cross power spectrum.

10. Example of calculating phase noise.

Chapter 8: Hilbert Transform.

1. The perfect Hilbert transformer.

2. Example of a Hilbert transform of a square wave.

3. Illustrate smoothing of the Example.

4. Explanation of peaks in Hilbert of square wave.

5. Mathematics of the Hilbert transform.

6. The analytic signal.

7. Example of construction of analytic signal.

8. Single-sideband RF signals.

9. SSB design.

10. The basic all-pass network.

11. -90° cascaded phase shift audio network.

12. Why the -90° network is not equivalent to a Hilbert transformer.

13. Filter method SSB transmitter.

14. Phasing method SSB receiver.

15. Filter method SSB receiver.

Appendix A: Additional discrete-signal information

16. Discrete derivative.

17. State variable solutions.

18. Using the discrete derivative.

Glossary.

Index.

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William E. Sabin, MSEE, Life Member IEEE, has worked at a professional engineering level in the electronics industry for forty years in almost all areas of signal processing, including analog, discrete, and digital. He has coedited three books on the subject of radio systems and circuits and is the author of about forty technical articles in electronics journals.

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  • Every chapter includes examples of practical uses of Discrete -Signal Analysis & Design.
  • Presents introductory digital signal processing concepts presented in a unique way that will be useful to graduate students; written by an experienced radio engineer. 
  • Includes Mathcad 14.0 for Students software giving practicing engineers and students alike all the tools they need to use this book. This software package is useful for the buyer long after they have mastered the text.
  • This Mathcad 14.0 for Students software package offers significant personal and process productivity advantages for product development, engineering design projects and hundreds of other applications where calculations are key. This is not a timed out version of this product. It is the actual software package and the user receives a single user license.
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“Discrete-Signal analysis and Design is written in an easy-to-follow, conversational style and supplies readers with a solid foundation for more advanced literature and software.  It employs the occasional re-examination and reinforcement of particularly important concepts and each chapter contains self-study examples and full-page Mathcad Worksheets, worked-out and fully explained.”  (International Journal Microstructure & Materials Properties, 2009)

"This volume is valuable for students, academic libraries, mathematicians, and working professionals, especially Mathead users." (CHOICE, August 2008)
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