Efficient linear Multiuser Detection for LEO Satellite Systems with Long Codes

Authors: S. Fischer, K. Knoche, V. Kühn, K.-D. Kammeyer
Abstract: This paper deals with the application of linear multi- user detectors in the mobile terminal of a LEO (Low Earth Orbit) satellite system with CDMA (Code Division Multiple Access). Since, no information of the spreading sequences of other users is given and since there are no training sequences, a blind adaptive interference detector (BAID) with low com- plexity is needed. All concepts proposed till now are based on short spreading codes, this means that the period of the spreading sequences has the length of one symbol. However, real satellite communication systems use long codes. In this paper a new scheme is proposed, which can be applied on long codes. By cascading multiple separated BAIDs (cBAID) the adaptation is done every N symbols, when the same part of the spreading sequence appears. Also a new approach with re- duced complexity is presented.
Document type: Conference Paper
Publication: Spilt, Croatia, 8. - 11. October 2002
Conference: International Conference on Software, Telecommunications and Computer Networks (SoftCOM 02)
Pages: 471-475
Volume: 1
Index: 198
SoftCOM_2002_fischer.pdf98 KBSoftCOM_2002_fischer.ps.gz144 KB
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