Performance degradation due to code tracking errors in spread-spectrum code-division multiple-access systems

Author

Hart, Bas W´ T ; Van Nee, Richard D J ; Prasad, Ramjee

Author_Institution

Telecommun. & Traffic-Control Syst. Group, Delft Univ. of Technol., Netherlands

Volume

14

Issue

8

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1669

Lastpage

1679

Abstract

The influence of code synchronization errors on the performance of direct-sequence spread-spectrum (DS/SS) communication systems is investigated. Insight is gained in the degradation of some basic performance parameters due to the tracking bias of a noncoherent delay lock loop (DLL). The performance parameters investigated are the bit-error probability, throughput and delay. Numerical results show that for receivers with an early-late spacing of d=1, using a noncoherent DLL, the results of a system performance analysis in a fast fading environment can be much too optimistic if the tracking errors are ignored

Keywords

channel capacity; code division multiple access; coding errors; delay circuits; delays; error statistics; fading; land mobile radio; pseudonoise codes; radio receivers; spread spectrum communication; DS/SS communication systems; bit-error probability; code synchronization errors; code tracking errors; delay; direct-sequence spread-spectrum; fast fading environment; noncoherent delay lock loop; performance degradation; receivers; spread-spectrum code-division multiple-access systems; throughput; tracking bias; Additive white noise; Bandwidth; Degradation; Delay; Fading; Interference; Multiaccess communication; Spread spectrum communication; System performance; Tracking loops;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.539422

Filename

539422