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Direct Digital Synthesizers Theory, Design and Applications by Jouko Vankka

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Published by Springer US in Boston, MA .
Written in English

Subjects:

  • Systems engineering,
  • Engineering,
  • Computer-aided design,
  • Computer engineering

Book details:

About the Edition

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.

Edition Notes

Statementby Jouko Vankka, Kari Halonen
SeriesThe Springer International Series in Engineering and Computer Science, Analog Circuits and Signal Processing -- 614, Springer International Series in Engineering and Computer Science, Analog Circuits and Signal Processing -- 614.
ContributionsHalonen, Kari
Classifications
LC ClassificationsTK7888.4
The Physical Object
Format[electronic resource] :
Pagination1 online resource (xxi, 193 pages).
Number of Pages193
ID Numbers
Open LibraryOL27032576M
ISBN 101441948953, 147573395X
ISBN 109781441948953, 9781475733952
OCLC/WorldCa851800632

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Direct Digital Frequency Synthesizers (DDS or DDFS) are used in communications as transmitter exciters, phase modulators, and local oscillators in receivers. The advantages are small size, superior frequency stability (the same as that of the driving clock oscillator), and short switching : Paperback. 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. 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. It will have appeal for wireless and wireline communication engineers, teachers and students. Direct Digital Frequency Synthesizers Book Abstract: With the advent of integrated circuits (IC), digital systems have become widely used in modern electronic devices, including communications and measurement equipment.

A major advantage of a direct digital synthesizer is that its output frequency, phase and amplitude can be precisely and rapidly manipulated under digital processor control. This book was written to find possible applications for radio communication systems. I bought this book recently with the intention of further augmenting my synthesis techniques. What I got was a pleasant enough read, but keep in mind, the title of this book is "A Comprehensive Guide to Understanding, Programming, Playing, and Recording the Ultimate Electronic Music Instrument"/5(49). Figure Simple Direct Digital Synthesizer In this case, the digital amplitude information that corresponds to a complete cycle of a sinewave is stored in the PROM. The PROM is therefore functioning as a sine lookup table. The address counter steps through and accesses each of the PROM’s memory locations and the contents (theFile Size: KB. Direct Digital Synthesizers: Theory, Design and Applica-tions Jouko Vankka November Dissertation for the degree of Doctor of Science in Technology to be presented with due per-mission of the Department of Electrical and Communications Engineering for public examina-.

whereas, the higher order harmonics of the output of PLL-based synthesizers can be filtered. There are other considerations which will be discussed shortly. fc ADDRESS COUNTER SIN LOOKUP TABLE. N-BITS CLOCK REGISTER LPF DAC fout LOOKUP TABLE CONTAINS SINE DATA FOR INTEGRAL NUMBER OF CYCLES N-BITS. Figure 1: Fundamental Direct Digital Synthesis File Size: KB. A digital synthesizer is a synthesizer that uses digital signal processing (DSP) techniques to make musical sounds. This in contrast to older analog synthesizers, which produce music using analog electronics, and samplers, which play back digital recordings of acoustic, electric, or electronic digital synthesizers emulate analog synthesizers; others include sampling . Direct Digital Frequency Synthesizers (DDS) are used in communications as transmitter exciters and local oscillators in receivers. The advantages are superior frequency stability, the same as that of the driving clock oscillator, and short switching times. The difficulties are lower output frequencies and rather large spurious signals. Direct digital synthesis (DDS) is a method of producing an analog waveform—usually a sine wave—by generating a time-varying signal in digital form and then performing a digital-to-analog conversion.