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Closed-Form Expressions for Channel Shortening Receivers Using A Priori Information

Abelló Barberán, Albert and Freixe, Jean-Marie and Roque, Damien Closed-Form Expressions for Channel Shortening Receivers Using A Priori Information. (2018) IEEE Communications Letters. ISSN 1089-7798

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Official URL: http://dx.doi.org/10.1109/LCOMM.2018.2830329


Channel shortening has been studied in the context of ISI and MIMO channels as a means to compute a posteriori probabilities with a BCJR algorithm at a reduced computational complexity. This is done by considering an approximate channel response of reduced length. In a turbo receiver, soft a priori information can be linearly combined with the received sequence to form a new input to the BCJR trellis-based processing. In this letter, we provide closed-form expressions for the channel shortening filters using a generalized mutual information objective function. The proposed receiver allows a complexity reduction with respect to numerical optimization approaches which may also present stability, precision and convergence issues.

Item Type:Article
Additional Information:Thanks to the IEEE (Institute of Electrical and Electronics Engineers). This paper is available at : https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8349948 “© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Eutelsat (FRANCE)
Laboratory name:
Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France) - Signal, Communication, Antenne et Navigation - SCAN
Eutelsat S.A. - Direction Générale de l'Armement
Deposited On:14 May 2018 11:25

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