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Exact analysis of spurious signals in Direct Digital Frequency Synthesizers due to amplitude quantization

  • Published:
Journal of Electronics (China)

An Erratum to this article was published on 01 September 2009

Abstract

Amplitude quantization is one of the main sources of spurious noise frequencies in Direct Digital Frequency Synthesizers (DDFSs), which affect their application to many wireless telecommunication systems. In this paper, two different kinds of spurious signals due to amplitude quantization in DDFSs are exactly formulated in the time domain and detailedly compared in the frequency domain, and the effects of the DDFS parameter variations on the spurious performance are thoroughly studied. Then the spectral properties and power levels of the amplitude-quantization spurs in the absence of phase-accumulator truncation are emphatically analyzed by waveform estimation and computer simulation, and several important conclusions are derived which can provide theoretical support for parameter choice and spurious performance evaluation in the application of DDFSs.

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Authors and Affiliations

  1. Institute of Computing Technology, Beijing Jiaotong University, Beijing, 100029, China

    Xinguang Tian

  2. School of Electronic Science and Engineering, National University of Defense Technology, Changsha, 410073, China

    Eryang Zhang

  3. No.5, Huayanbeili, Chaoyang District, Beijing, 100029, China

    Xinguang Tian

Authors
  1. Xinguang Tian
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  2. Eryang Zhang
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Correspondence to Xinguang Tian.

Additional information

Supported by National High-Technology Research and Development Plan of China (Grant No.2006AA01Z452).

Communication author: Tian Xinguang, born in 1976, male, Ph.D., Assistant Professor.

An erratum to this article is available at http://dx.doi.org/10.1007/s11767-009-1002-6.

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Tian, X., Zhang, E. Exact analysis of spurious signals in Direct Digital Frequency Synthesizers due to amplitude quantization. J. Electron.(China) 26, 448–455 (2009). https://doi.org/10.1007/s11767-008-0155-z

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  • DOI: https://doi.org/10.1007/s11767-008-0155-z

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