Blind Multiuser Detection in Multirate CDMA Transmissions Using Fluctuations of Correlation Estimators - Université de Bretagne Occidentale
Communication Dans Un Congrès Année : 2006

Blind Multiuser Detection in Multirate CDMA Transmissions Using Fluctuations of Correlation Estimators

Résumé

This paper deals with the problem of blind multiuser detection in multirate direct-sequence code division multiple access (DS-CDMA). Direct-sequence spread spectrum (DSSS) signals are well-known for their low probability of interception: their statistics are similar to those of a noise; furthermore, they are usually transmitted below the noise level. Here, the method based on the fluctuations of autocorrelation estimators, previously described in a single user context, is extended to multiusers. From the variable spreading length technique, we will evidence an increase of these periodical fluctuations and, on average, a relationship between their peak amplitudes and sequence lengths. A theoretical analysis will show that detection is possible, even with a very low signal-to-noise ratio (SNR) at the detector input. This approach will be illustrated with experimental results. The assessment of symbol periods allows one to start the synchronization process proposed recently, which also permits the determination of the number of interfering users in each group of users transmitting at the same symbol period, thus, conversely at the same data rate.
Fichier principal
Vignette du fichier
2006_11_globecom_MultiuserDetectionMultirateCDMA.pdf (873.19 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence
Copyright (Tous droits réservés)

Dates et versions

hal-00485674 , version 1 (10-05-2023)

Licence

Copyright (Tous droits réservés)

Identifiants

Citer

Crépin Nsiala-Nzéza, Roland Gautier, Gilles Burel. Blind Multiuser Detection in Multirate CDMA Transmissions Using Fluctuations of Correlation Estimators. GLOBECOM 2006, IEEE, Nov 2006, San Francisco, California, United States. pp.1-5, ⟨10.1109/GLOCOM.2006.592⟩. ⟨hal-00485674⟩
90 Consultations
30 Téléchargements

Altmetric

Partager

More