Skip to main content
SpringerLink
Log in

Uplink Channel Estimation for Multi-user OFDM-based Systems

  • Published:
Wireless Personal Communications Aims and scope Submit manuscript

Abstract

In this paper we propose a simple, yet flexible and efficient, channel estimator for the uplink in broadband orthogonal frequency division multiplexing (OFDM) systems. The processing is performed in the time-domain, by extracting the Channel’s Impulse Response (CIR) for each user from a joint training signal. In this OFDM system, the pilot sequence we advocate, where all users share the same pilot sub-carriers, consists of one OFDM-symbol endowed with time-shifted properties per user, which isolates each user’s CIR and is robust against multi-user interference. The feasibility of our approach is substantiated by system simulation results obtained using BRAN-A broadband mobile wireless channel model.

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

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Nee, R. V., & Prasad, R. (2000). OFDM For wireless multimedia communications. 1st ed. Artech House.

  2. Larsson E.G. (2004). On the combination of spatial diversity and multiuser diversity. IEEE Comunications Letters, 8(8): 517–519

    Article  MathSciNet  Google Scholar 

  3. Sternad, M., & Aronsson, D. (2005). Channel estimation and prediction for adaptive OFDMA/TDMA uplinks, based on overlapping pilots. In Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vol. 3, March 2005.

  4. Minn H., Bhargava V. (2000). An investigation into time-domain approach for OFDM channel estimation. IEEE Transactions on Broadcasting, 46(4): 240–248

    Article  Google Scholar 

  5. Medbo, J. (1998). Channel Models for Hiperlan/2 in different indoor scenarios. ETSI BRAN doc. 3ERI085b.

  6. Edfors, O., Sandell, M., van de Beek, J.-J., Wilson, S.K., & Borjesson, P. O. (1996). Analysis of DFT-based channel estimators for OFDM. Research Report TULEA 1996:17, Division of Signal Processing, Lulea University of Technology, Sweden.

  7. Choi Ji-Woong, Lee Yong-Hwan (2005). Optimum pilot pattern for channel estimation in OFDM systems. IEEE Transactions on Wireless Communications, 3(5): 2083–2088

    Article  MathSciNet  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Instituto Politécnico de Leiria, Morro do Lena, Alto Vieiro, 2411-901, Leiria, Portugal

    Carlos Ribeiro

  2. Instituto de Telecomunicações, Universidade de Aveiro, Campo Universitário, 3810-193, Aveiro, Portugal

    Carlos Ribeiro & Atílio Gameiro

  3. University Carlos III de Madrid, Av. de la Universidad, 30-28911, Leganés, Madrid, Spain

    M. Julia Fernández-Getino Garcia, Víctor P. Gil Jiménez & Ana García Armada

Authors
  1. Carlos Ribeiro
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. Julia Fernández-Getino Garcia
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Víctor P. Gil Jiménez
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Atílio Gameiro
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Ana García Armada
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to M. Julia Fernández-Getino Garcia.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ribeiro, C., Fernández-Getino Garcia, M.J., Gil Jiménez, V.P. et al. Uplink Channel Estimation for Multi-user OFDM-based Systems. Wireless Pers Commun 47, 125–136 (2008). https://doi.org/10.1007/s11277-007-9396-7

Download citation

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11277-007-9396-7

Keywords

Search

Navigation