© 2001

Direct Digital Synthesizers

Theory, Design and Applications


Table of contents

  1. Front Matter
    Pages i-xxi
  2. Jouko Vankka, Kari Halonen
    Pages 1-7
  3. Jouko Vankka, Kari Halonen
    Pages 8-17
  4. Jouko Vankka, Kari Halonen
    Pages 18-22
  5. Jouko Vankka, Kari Halonen
    Pages 23-32
  6. Jouko Vankka, Kari Halonen
    Pages 33-47
  7. Jouko Vankka, Kari Halonen
    Pages 48-62
  8. Jouko Vankka, Kari Halonen
    Pages 79-86
  9. Jouko Vankka, Kari Halonen
    Pages 87-100
  10. Jouko Vankka, Kari Halonen
    Pages 101-114
  11. Jouko Vankka, Kari Halonen
    Pages 115-134
  12. Jouko Vankka, Kari Halonen
    Pages 135-141
  13. Jouko Vankka, Kari Halonen
    Pages 142-166
  14. Jouko Vankka, Kari Halonen
    Pages 167-168
  15. Back Matter
    Pages 169-193

About this book


A major advantage of a direct digital synthesizer (DDS) is that its output frequency, phase and amplitude can be precisely and rapidly manipulated under digital processor control. Other inherent DDS attributes include the ability to tune with extremely fine frequency and phase resolution, and to rapidly `hop' between frequencies. These combined characteristics have made the technology popular in military radar and communications systems. In fact, DDS technology was previously applied almost exclusively to high-end and military applications: it was costly, power-hungry, difficult to implement, and required a discrete high speed D/A converter. Due to improved integrated circuit (IC) technologies, they now present a viable alternative to analog-based phase-locked loop (PLL) technology for generating agile analog output frequency in consumer synthesizer applications.
It is easy to include different modulation capabilities in the DDS by using digital signal processing (DSP) methods, because the signal is in digital form. By programming the DDS, adaptive channel bandwidths, modulation formats, frequency hopping and data rates are easily achieved. The flexibility of the DDS makes it ideal for signal generator for software radio. The digital circuits used to implement signal-processing functions do not suffer the effects of thermal drift, aging and component variations associated with their analog counterparts. The implementation of digital functional blocks makes it possible to achieve a high degree of system integration. Recent advances in IC fabrication technology, particularly CMOS, coupled with advanced DSP algorithms and architectures are providing possible single-chip DDS solutions to complex communication and signal processing subsystems as modulators, demodulators, local oscillators, programmable clock generators, and chirp generators. The DDS addresses a variety of applications, including cable modems, measurement equipments, arbitrary waveform generators, cellular base stations and wireless local loop base stations.
Direct Digital Synthesizers was written to find possible applications for radio communication systems. It will have appeal for wireless and wireline communication engineers, teachers and students.


CMOS Modulation Phase Signal algorithm algorithms analog circuit communication communication systems integrated circuit programming radar radio software

Authors and affiliations

  1. 1.Helsinki University of TechnologyFinland

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