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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Sequences with small aperiodic correlations in the vicinity of the zero shift
 Huber, J. ; Informationstechnische Gesellschaft ITG: 4th International ITG Conference Source and Channel Coding 2002. Conference record : January 28  30, 2002, Berlin Berlin: VDEVerlag, 2002 (ITGFachbericht 170) ISBN: 380072670X pp.183190 
 International Conference Source and Channel Coding <4, 2002, Berlin> 

 English 
 Conference Paper 
 Fraunhofer HHI () 
Abstract
The paper addresses a problem of designing sequences with small aperiodic autocorrelations and crosscorrelations within a given window around the zero shift. We provide a systematic method for constructing mutually orthogonal sequences of length N so that all jth aperiodic autocorrelations and all jth crosscorrelations are bounded above by j/N, 1 j < d where d N is a given parameter. Furthermore, we prove a tight upper bound on a number of sequences, whose all aperiodic correlations are zero within the window {d + 1, ..., d  1) except for the autocorrelation at the origin. Such sequences are used in LASCDMA (Large Area Synchronized  Code Division Multiple Access), a new CDMAsystem proposed as the basis for all future wireless communications.