NDLI: Data-Driven Code-Hopping for MC-CDMA Precoding Schemes

Content Provider	IEEE Xplore Digital Library
Author	Masouros, C. Alsusa, E.
Copyright Year	2008
Description	Author affiliation: Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester (Masouros, C.; Alsusa, E.)
Abstract	A novel code optimization scheme is presented for the downlink of multicarrier code division multiple access (MC-CDMA) systems employing phase shift keying (PSK) modulation. The optimization is based on dynamically re-allocating the available signature waveforms amongst the users on a symbol-by-symbol basis in order to manipulate and utilize interference amongst them. By applying the appropriate allocation criteria destructive interference between users is minimized while constructive is maximized. As a result, employing this on top of conventional schemes enhances the received signal to interference-plus-noise ratio (SINR) without additional transmitted power-per-user investment. The trade-off to the resulting performance improvement is the need for transmission of some extra side information, which by using the proposed processing is kept to a minimum. While performance benefits can be expected for various scenarios, the focus of this paper is on MC-CDMA precoding schemes. Analysis and simulations show a considerable bit error rate (BER) reduction for the case of decorrelating precoding methods.
Starting Page	1
Ending Page	5
File Size	254678
Page Count	5
File Format	PDF
ISBN	9781424423248
ISSN	1930529X
DOI	10.1109/GLOCOM.2008.ECP.778
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multicarrier code division multiple access Interference Phase shift keying Bit error rate Downlink Phase modulation Modulation coding Signal to noise ratio Investments Analytical models
Content Type	Text
Resource Type	Article

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