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2 results

  • 6 - Signal Space Representation

  • Robert F. H. Fischer, Universitat Ulm, Germany, Johannes B. Huber, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany
  • Book:
    Digital Communications
    Published online:
    22 November 2024
    Print publication:
    31 October 2024, pp 180-246

  • Summary

    A general view on digital modulation schemes beyond the concept of PAM is developed. This is required as many important modulation formats (e.g., digital frequency modulation) do not fall under the umbrella of PAM. To that end, the separation between the operations of coding and modulation is unambiguously defined. The key tool for the analysis and synthesis of transmission schemes is the representation of signals in a signal space. The concept is introduced and discussed in detail. Based on this view, methods for optimum coherent and non-coherent signal reception for any kind of general digital modulation scheme are derived. The principles of maximum-likelihood detection and maximum-likelihood sequence detection are discussed.

  • Five-element Digital Corrector Receiver for the Chinese Spectral Radioheliograph

  • An Zhao, Yihua Yan, Wei Wang, Linjie Chen, Jian Zhang, Fei Liu
  • Journal:
    Proceedings of the International Astronomical Union / Volume 8 / Issue S294 / August 2012
    Published online by Cambridge University Press:
    18 July 2013, pp. 497-498
    Print publication:
    August 2012
    • Article
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  • The design of five-element digital receiver system is decribed. At first, we analyzed the process of data processing in the receiver system. Then we wrote programs to implement the FIR parallel filter and showed its simulation results. Finally the testing result of the correlation receiver system is demonstrated.