Improved channel estimation for iterative receivers

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

In iterative receiver structures, soft information
becomes available after the decoding stage in the first iteration. This information is used to enhance the quality of the channel estimates for the next iteration. Channel estimation plays a crucial role in multi-user detection because the effective identification sequence for each user strongly depends on the channel characteristics. To combine deterministic pilot information with soft information, a generalized estimator based on the linear minimum mean square error (LMMSE) principle is derived. We present the special case of orthogonal frequency division multiplexing (OFDM) based multi-carrier code division multiple access (MC-CDMA) in detail and provide simulation results.
The presented channel estimation algorithm can be also applied to direct sequence (DS)-CDMA and multi-input multi-output (MIMO) systems.

Details

Authors
  • Thomas Zemen
  • Maja Loncar
  • Joachim Wehinger
  • Christoph Mecklenbräuker
  • Ralf Mueller
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering
Original languageEnglish
Title of host publicationIEEE Global Telecommunications Conference, 2003. GLOBECOM '03.
PublisherIEEE--Institute of Electrical and Electronics Engineers Inc.
Pages257-261
Volume1
ISBN (Print)0-7803-7974-8
StatePublished - 2003
Peer-reviewedYes
EventIEEE Global Telecommunications Conference, 2003 - San Francisco, CA, United States
Duration: 2003 Dec 12003 Dec 5

Publication series

Name
Volume1

Conference

ConferenceIEEE Global Telecommunications Conference, 2003
Abbreviated titleGLOBECOM'03
CountryUnited States
CitySan Francisco, CA
Period2003/12/012003/12/05