Effect of tracking error on DS-CDMA partial parallel interference cancellation

Author

Gao, Xuc ; Li, Cheng-shu ; Lai, Xiao-rong

Author_Institution

Inst. of Modern Commun., Northern Jiaotong Univ., Beijing, China

Volume

1

fYear

2000

fDate

2000

Firstpage

382

Abstract

Partial parallel interference cancellation in a DS-CDMA system with tracking errors is studied. The aforementioned work showed that by multiplying symbol estimates by a factor less than unity in the early stages of cancellation, the performance of parallel cancellation can be improved relative to full (“brute force”) cancellation. Shan and Rappaport (see IEEE GlobeCom´98, vol.3, p.2615-20, 1998) shows that the BER performance is a function of the factor and the “best factor” can be far less than one. In a practical system, tracking errors need to be considered. This paper considers the effect of timing errors on the selection of the “best factor”. We show that due to the timing error the interference cancellation is less reliable and a smaller factor of cancellation need to be employed

Keywords

code division multiple access; error statistics; interference suppression; multiuser channels; radio tracking; radiofrequency interference; spread spectrum communication; timing; BER performance; DS-CDMA system; best factor; partial parallel interference cancellation; symbol estimates; timing errors; tracking error; Bit error rate; Computer errors; Delay estimation; Detectors; Frequency estimation; Interference cancellation; Multiaccess communication; Phase estimation; Signal processing; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE

Conference_Location

Chicago, IL

ISSN

1525-3511

Print_ISBN

0-7803-6596-8

Type

conf

DOI

10.1109/WCNC.2000.904662

Filename

904662