001050148
100 $a y50
101 $aang
2001 $aHybrid scheme based ACM (Automatic Censoring Multipaths) and antenna diversity for PN code acquisition$bressource électronique
210 $aUniversité de Sidi Bel Abbès - Djillali Liabes : Département d'Electronique$cUniversité de Sidi Bel Abbès - Djillali Liabes
328 1$bDoctorat$cElectronique$eDépartement d'Electronique , Université de Sidi Bel Abbès - Djillali Liabes
330 $aAn adaptive hybrid acquisition system based on automatic censoring multipaths (ACM) and antenna diversity for DS CDMA in frequency selective Rayleigh fading channel is presented. The detector scheme is based on ordered statistics where the ACM algorithm capable to estimate the number of multipaths to be censored to evaluate the background level. This estimation is done using Monte Carlo simulation for a constant false censoring probability, and then enhanced by a theory developed for this purpose to validate the number of interferers estimated by the Monte Carlo simulations. The ACM algorithm does not require any prior knowledge about the number of multipaths. At this step, the total background level is evaluated with more accuracy, which allows a fast synchronization. Also, of logic function based ACM algorithm using parallel automatic censoring multipaths structure is integrated.
337 $aok
610 $aMots clés : DS-CDMA, PN-Acquisition , ACM, antenna diversity, Order statictics-CFAR
700 $aDOUDOU, Fatima Zohra
701 $aArray
801 0$aDZ$bCERIST PNST
901$ac