Skip to content

Convex constraint and semiprojected steepest descent algorithms-for single-carrier equalization in wideband MIMO systems

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

Original languageEnglish
Title of host publicationWorkshop on Signal Processing Advances in Wireless Communications, 2004 (SPAWC '04)
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Publication dateJul 2004
Pages410 - 414
Number of pages4
ISBN (Print)0780383380
DOIs
StatePublished

Conference

Conference5th Workshop on Signal Processing Advances in Wireless Communications
CountryPortugal
CityLisbon
Period1/07/04 → …

Abstract

Two computationally efficient algorithms are proposed for equalizing wideband MIMO channels in the space-time domain. Both of proposed methods can be viewed as modifications to the steepest descent method, for implementing the zero-forcing (or unconstraint maximum-likelihood) MIMO equalizer, which allows constraints about the feasible solution set to be incorporated in the iterative estimation process. The first approach assumes that the solution belongs in a closed convex set (inside a Hilbert space) and nearest point projection on the set is performed in each iterative step. The method is guaranteed to converge in the optimum point inside the convex set and hence provides significantly better performance than the standard linear equalizers. Fast convergence to a nearly optimal estimate can be achieved by the second proposed algorithm in which the new estimate in each iteration, is semiprojected on the discrete-discontinuous solution set. The proposed algorithms are of very low complexity as the number of arithmetic operations scales only linearly with the problem's dimensionally.

Additional information

Conference Proceedings/Title of Journal: IEEE Workshop on Signal Processing Advances in Wireless Communications, 2004 (SPAWC '04) Rose publication type: Conference contribution Sponsorship: The first author would like to thank QinetiQ Ltd. and EPSRC for funding his research at the University of Bristol Terms of use: Copyright © 2004 IEEE. Reprinted from Proceedings of IEEE 5th Workshop on Signal Processing Advances in Wireless Communications, 2004. 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 pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it Rose publication type: Conference contribution Terms of use: Copyright © 2004 IEEE. Reprinted from Proceedings of IEEE 5th Workshop on Signal Processing Advances in Wireless Communications, 2004. 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 pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Documents

DOI

Research areas

  • wideband, MIMO, MIMO systems, space-time codes, channel estimation

Event

5th Workshop on Signal Processing Advances in Wireless Communications

Abbreviated TitleSPAWC '04
Duration1 Jul 2004 → …
CountryPortugal
CityLisbon

Event: Conference

View research connections

Related faculties, schools or groups