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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. The L1norm of outofphase peaks of the aperiodic autocorrelation function of binary sequences
 IEEE Signal Processing Society: IEEE International Conference on Acoustics, Speech, and Signal Processing 2000. Proceedings. Vol.5: Communications, sensor array and multichannel signal processing : 5  9 June, 2000, Hilton Hotel and Convention Center, Istanbul, Turkey Piscataway: IEEE Operations Center, 2000 ISBN: 0780362934 ISBN: 0780362942 ISBN: 0780362950 ISBN: 0780362969 pp.25332536 
 International Conference on Acoustics, Speech, and Signal Processing (ICASSP) <25, 2000, Istanbul> 

 English 
 Conference Paper 
 Fraunhofer HHI () 
 awgn channels; binary sequences; correlation theory; land mobile radio; maximum likelihood estimation; multipath channels; noise; l1norm; outofphase peaks; aperiodic autocorrelation function; meansquare errors; maximumlikelihood channel estimate; noise enhancement factor; aperiodic invertible sequence; sequence length; aperiodic autocorrelation magnitude; skewsymmetric barker sequences; mobile radio channel estimation 
Abstract
For the meansquare errors of the maximumlikelihood channel estimate, the noise enhancement factor of an aperiodic invertible sequence is an optimality criterion. Massey posed a question as to whether there exist binary sequences that achieve the absolute optimum for the sequence length N to infinity since then they would be preeminently eligible for channel estimation. However, the noise enhancement factor is extremely difficult to examine both analytically and numerically often making extensive investigations of sequences impossible. For this reason, it is convenient to consider the l1norm of outofphase peaks of the aperiodic autocorrelation magnitude. In this paper, it is shown that the l1norm can never have the required behaviour for solving Massey's problem in the case of binary sequences and that the best possible binary sequences in this connection are skewsymmetric Barker sequences. The paper is of interest in mobile radio channels' study.