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Reduced complexity equalization of MIMO systems with a fixed-lag smoothed M-BCJR algorithm

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

Original languageEnglish
Title of host publicationWorkshop on Signal Processing Advances in Wireless Communications, New York, United States
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Publication dateJun 2005
Pages136 - 140
ISBN (Print)0780388674


Conference6th Workshop on Signal Processing Advances in Wireless Communications
CountryUnited States
CityNew York
Period1/06/05 → …


M-BCJR algorithm is a reduced state version of the BCJR algorithm and selects a set of active states in the forward recursion based on an estimation of the filtered probability distribution of states at each time. We propose to use instead an estimation of the fixed-lag smoothed probability distribution of states with a non zero lag. Our implementation uses a Gaussian approximation to estimate these distributions with a low complexity, using the principle of probabilistic data association (PDA). The performance of the M-BCJR can be seen to be greatly improved as a result while remaining robust against changes in the channel multipath profile

Additional information

Conference Proceedings/Title of Journal: IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005 Rose publication type: Conference contribution Sponsorship: The authors would like to thank Toshiba Research Europe Limited, Bristol, U.K. for financially supporting this work Terms of use: Copyright © 2005 IEEE. Reprinted from Proceedings of IEEE Workshop on Signal Processing Advances in Wireless Communications, 2005. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • BCJR algorithm, M algorithm, probabilistic data association, MIMO equalization


6th Workshop on Signal Processing Advances in Wireless Communications

Duration1 Jun 2005 → …
CountryUnited States
CityNew York

Event: Conference




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