Low complexity Wiener filtering in CDMA systems using a class of pseudo-noise spreading codes

Title: Low complexity Wiener filtering in CDMA systems using a class of pseudo-noise spreading codes
Creator: Carvajal, Rodrigo; Mahata, Kaushik; Agüero, Juan C.
Relation: IEEE Communications Letters Vol. 16, Issue 9, p. 1357-1360
Publisher Link: http://dx.doi.org/10.1109/LCOMM.2012.070512.121051
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Resource Type: journal article
Date: 2012
Description: Code division multiple access (CDMA) has become a widely adopted technology for wireless communications, particularly in mobile third generation systems (3G) and global positional system (GPS). In CDMA, a particular class of pseudonoise (PN) spreading codes yields a code-set Grammian with only two distinct eigenvalues. For these spreading codes, we propose a computationally efficient method for signal detection using Wiener filtering. Our approach relies on a matrix inversion step, where we gain in computational efficiency by using the Sherman-Morrison-Woodbury formula. The resulting approach involves significantly less computational load compared to popular approaches like Conjugate Gradient (CG) method and the (traditional) Cholesky decomposition.
Subject: CDMA; Wiener filter; m-sequences; gold codes; Kasami sequences
Identifier: http://hdl.handle.net/1959.13/1311304
Identifier: uon:22193
Identifier: ISSN:1089-7798
Language: eng
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