Comparison between one and two branches DLL in a CDMA system

Author

Ruiz-Mezcua, Belén ; González-Ahijado, Ángel ; López-Carrillo, Ma Isabel

Author_Institution

Alcatel Stand. Electr., Madrid, Spain

fYear

1994

fDate

8-10 Jun 1994

Firstpage

559

Abstract

Presents the results of simulations performed with the tracking module of a CDMA system software simulator (COSSAP), considering a mobile indoors environment. The simulation has been done with the different parameters that have an influence in the performance of the system such as SNR, number of users, initial misalignment, drift between clocks (emission and reception) and pilot gains, analyzing the parameter effects until the DLL is unlocked. The authors show the results and conclude that the two branches DLL improves the performance with respect to the one branch DLL but increasing the computational cost. The obtained results are compared with the theoretical results

Keywords

code division multiple access; delay circuits; digital simulation; indoor radio; land mobile radio; radio receivers; radiofrequency interference; CDMA system; CDMA system software simulator; COSSAP; SNR; clocks; computational cost; drift; initial misalignment; mobile indoors environment; number of users; one branch DLL; pilot gains; tracking module; two branches DLL; Additive noise; Clocks; Delay; Filters; Interference; Multiaccess communication; Radio frequency; System software; Tracking loops; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1994 IEEE 44th

Conference_Location

Stockholm

ISSN

1090-3038

Print_ISBN

0-7803-1927-3

Type

conf

DOI

10.1109/VETEC.1994.345064

Filename

345064