1 Hdu ) Du 5 Hvlvwdqw & 0 / 3 Ursdjdwlrq ' Hod \ ( Vwlpdwlrq
نویسندگان
چکیده
Multi-user receivers in asynchronous Direct Sequence Code Division Multiple Access (DS-CDMA) systems require the knowledge of several parameters such as timing delay between users. The goal of this work is to present a QHDU IDU resistant joint multi-user synchronization and detection algorithm for DSCDMA systems. The solution is based on the Conditional Maximum Likelihood (CML) estimation method (classically used in the context of sensor array processing) that leads to a fast convergence algorithm to estimate the time delays among users. At the same time the estimator implements the decorrelating detector, identifying the transmitted symbols for the different users.
منابع مشابه
Qvxshuylvhg & Odvvlilfdwlrq Ri 5 Dgdu , Pdjhv % Dvhg Rq + Lgghq 0 Dunry 0 Rghov Dqg * Hqhudolvhg 0 L [ Wxuh ( Vwlpdwlrq
© Copyright 2000 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proc. SAR Image Analysis, Modelling, and Techniques V, vol. SPIE 4173, Barcelona, Spain, September 2000, and is made available as an electronic reprint with permission of SPIE. Single print or electronic copies for personal use only are allowed. Systematic or multiple reproduction, or distribution t...
متن کاملOD stretch vibrational relaxation of HOD in liquid to supercritical H(2)O.
The population relaxation of the OD stretching vibration of HOD diluted in H(2)O is studied by time-resolved infrared pump-probe spectroscopy for temperatures between 278 and 663 K in the density range 0.281 OD stretching transition at low temperatures show a delay between excited state decay and formation of the therm...
متن کاملVisual Quality of Service Programming for Distributed Heterogeneous Systems
! " $#% & ' ( ) $ * + ' , . /#0 1 23 ! 54167 . -8 & 9#0 :,; ",< (,;# & . , =#0 $ '5#> ? @ % ' 5#0 $ 2A 5 . B C . !D -E D & 5 . F ) /#5 0#0 "#0 ! GD HI '( 9#0 !, ! GD HJ "#0 ! GD HK#0 L $ . 54 MN !OJ A ) . $ :P #0 . C # . (, PF QA I# A R @ ( 1 ( + S T I#0 B '9 1#/ D3 I# $'B# ' . U ( E ! A ( &D. @ $ . ( "#* & 3 ' 54WVX PF ( H !OJ &, A X Y ! $ . $#R & 3 ' X 2A $ Y# '5#> ,; + ' !ZI'E[X I#0 $ ! \D E...
متن کاملDelivery of surgical care in a district general hospital without high dependency unit facilities.
BACKGROUND Many hospitals lack the facilities for high dependency care, and patients requiring this level of care are nursed on the surgical ward. The aim of this study was to assess the extent of this problem in a district general hospital, looking at the impact of providing high dependency unit (HDU) care at ward level. METHODS A 28 bed surgical ward was studied for 39 consecutive days. Pat...
متن کامل