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Spreading Code Design Using a Global Optimization Method
Responsible organisation
2005 (English)In: Annals of Operations Research, ISSN 0254-5330, E-ISSN 1572-9338, Vol. 133, no 1-4, 249-264 p.Article in journal (Refereed) Published
Abstract [en]

The performance of a code division multiple access system depends on the correlation properties of the employed spreading code. Low cross-correlation values between spreading sequences are desired to suppress multiple access interference and to improve bit error performance. An auto-correlation function with a distinct peak enables proper synchronization and suppresses intersymbol interference. However, these requirements contradict each other and a trade-off needs to be established. In this paper, a global two dimensional optimization method is proposed to minimize the out-of-phase average mean-square aperiodic auto-correlation with average mean-square aperiodic cross-correlation being allowed to lie within a fixed region. This approach is applied to design sets of complex spreading sequences. A design example is presented to illustrate the relation between various correlation characteristics. The correlations of the obtained sets are compared with correlations of other known sequences.

Place, publisher, year, edition, pages
Springer , 2005. Vol. 133, no 1-4, 249-264 p.
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:bth-9087ISI: 000227304900016Local ID: oai:bth.se:forskinfoA6BCF5F0B06BA4D3C125733200457B4EOAI: oai:DiVA.org:bth-9087DiVA: diva2:836864
Available from: 2012-09-18 Created: 2007-08-09 Last updated: 2015-06-30Bibliographically approved

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Zepernick, Hans-Jürgen
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