Modified unbiased EM-based channel estimation for MIMO turbo receivers

Mohammad Ali Khalighi, Joseph Boutros

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We consider the channel estimation issue in a multiple inputs multiple outputs (MIMO) system using bit-interleaved coded modulation (BICM) scheme at transmitter and iterative detection based on maximum a posteriori (MAP) at receiver. Channel coefficients are updated in each iteration, using a semi-blind estimation technique based on the expectation maximization (EM) algorithm. We first consider a previously proposed approach based on EM, and show its disadvantages. We then propose a modification to it that provides an unbiased channel estimate and permits a better convergence of the iterative receiver. The proposed modification is of special interest for small ratios of pilot-to-data sequences length.

Original languageEnglish
Title of host publicationProceedings of the Fourth IEEE International Symposium on Signal Processing and Information Technology
Pages127-131
Number of pages5
Publication statusPublished - 1 Dec 2004
Externally publishedYes
EventFourth IEEE International Symposium on Signal processing and Information Technology, ISSPIT 2004 - Rome, Italy
Duration: 18 Dec 200421 Dec 2004

Other

OtherFourth IEEE International Symposium on Signal processing and Information Technology, ISSPIT 2004
CountryItaly
CityRome
Period18/12/0421/12/04

Fingerprint

Channel estimation
Transmitters
Modulation

Keywords

  • Channel estimation
  • Expectation maximization
  • MAP detection
  • MIMO systems
  • Training sequences

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Khalighi, M. A., & Boutros, J. (2004). Modified unbiased EM-based channel estimation for MIMO turbo receivers. In Proceedings of the Fourth IEEE International Symposium on Signal Processing and Information Technology (pp. 127-131)

Modified unbiased EM-based channel estimation for MIMO turbo receivers. / Khalighi, Mohammad Ali; Boutros, Joseph.

Proceedings of the Fourth IEEE International Symposium on Signal Processing and Information Technology. 2004. p. 127-131.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Khalighi, MA & Boutros, J 2004, Modified unbiased EM-based channel estimation for MIMO turbo receivers. in Proceedings of the Fourth IEEE International Symposium on Signal Processing and Information Technology. pp. 127-131, Fourth IEEE International Symposium on Signal processing and Information Technology, ISSPIT 2004, Rome, Italy, 18/12/04.
Khalighi MA, Boutros J. Modified unbiased EM-based channel estimation for MIMO turbo receivers. In Proceedings of the Fourth IEEE International Symposium on Signal Processing and Information Technology. 2004. p. 127-131
Khalighi, Mohammad Ali ; Boutros, Joseph. / Modified unbiased EM-based channel estimation for MIMO turbo receivers. Proceedings of the Fourth IEEE International Symposium on Signal Processing and Information Technology. 2004. pp. 127-131
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