Skip to main content
SpringerLink
Log in

Introduction and Some History

  • Chapter
  • First Online:
Introduction to Digital Communications

Part of the book series: Signals and Communication Technology ((SCT))

  • 1752 Accesses

Abstract

Time-variant systems are of general interest, because they play an important role in communications due to the emerging wireless networks for in-house and outdoor applications. As a matter of fact, a wireless channel can change its parameters with time depending on the position of the mobile transmitter, the receiver, and on the change of the surroundings. During the education of electrical engineers, the main focus is on time-invariant systems and the topic of time-variant systems is not always strongly alluded. Thus, also from this perspective, a general view of time-variant systems and their mathematical description is favorable.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 79.99
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 99.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Notes

  1. 1.

    Please note that several authors of later literature denote \(g(t,\tau )\) bewildered as impulse response.

References

  1. J.R. Carson, Theory and calculation of variable systems. Phys. Rev. 17, (1921)

    Article  MathSciNet  Google Scholar 

  2. L.A. Zadeh, Frequency analysis of variable networks, in Proceedings of the IRE (1950)

    Google Scholar 

  3. P.A. Bello, Characterization of randomly time-variant linear channels. IEEE Trans. Commun. Syst. (1963)

    Google Scholar 

  4. T. Kailath, Sampling models for linear time-variant filters, Technical report, M.I.T. Research Laboratory of Electronics, Cambridge, Massachusetts, Report 352 (1959)

    Google Scholar 

  5. T. Kailath, Channel characterization: time-variant dispersive channels, in Lectures on Communications System Theory, ed. by E.J. Baghdady (McGraw Hill, New York, 1961)

    Google Scholar 

  6. A.J. Gersho, Characterization of time-varying linear systems, in Proceedings of the IEEE(Correspondence) (1963)

    Google Scholar 

  7. P.A. Bello, Time-frequency duality. IEEE Trans. Inf. Theory. (1964)

    Google Scholar 

  8. Y. Shmaliy, Continuous-Time Signals (Springer, Berlin, 2006)

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Telecommunications, University of Stuttgart, Stuttgart, Baden-Wurttemberg, Germany

    Joachim Speidel

Authors
  1. Joachim Speidel
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Joachim Speidel .

Rights and permissions

Reprints and permissions

Copyright information

© 2019 Springer Nature Switzerland AG

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Speidel, J. (2019). Introduction and Some History. In: Introduction to Digital Communications. Signals and Communication Technology. Springer, Cham. https://doi.org/10.1007/978-3-030-00548-1_9

Download citation

  • DOI: https://doi.org/10.1007/978-3-030-00548-1_9

  • Published:

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-00547-4

  • Online ISBN: 978-3-030-00548-1

  • eBook Packages: EngineeringEngineering (R0)

Publish with us

Policies and ethics

Search

Navigation