Simulation of a second order delay locked loop in multipath environment

Author

González, A. ; Ruiz, B. ; López, M.I. ; Valdeolmillos, C.

Author_Institution

Alcatel Standard Electrica, Madrid, Spain

fYear

1993

fDate

18-20 May 1993

Firstpage

887

Lastpage

890

Abstract

The delay-locked loop (DLL) is a powerful technique to keep the alignment between PN sequences. These sequences are widely used in code division multiple access (CDMA) communication systems. A second-order DLL is selected as the basic scheme for a simulator due to its ability to correct a phase and frequency steps. An event-driven simulator is used for testing the performance of the DLL. In this way, no linear assumptions are made. Simulations are performed in a multipath environment by means of an N-paths channel model. The results of the simulations of the performance of the DLL in a mobile environment are presented, and some conclusions are added as consequences of the simulation results

Keywords

circuit testing; code division multiple access; delay circuits; discrete event simulation; land mobile radio; multipath channels; pseudonoise codes; spread spectrum communication; CDMA; PN sequences; channel model; code division multiple access; event-driven simulator; mobile environment; multipath environment; second order delay locked loop; testing; Circuits; Clocks; Delay effects; Delay estimation; Detectors; Differential equations; Multiaccess communication; Numerical simulation; Signal generators; Synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1993., 43rd IEEE

Conference_Location

Secaucus, NJ

ISSN

1090-3038

Print_ISBN

0-7803-1267-8

Type

conf

DOI

10.1109/VETEC.1993.510953

Filename

510953