The Effect of System Load on the Existence of Bit Errors in CDMA With and Without Parallel Interference Cancelation

Author

Van der Hofstad, Remco ; Löwe, Matthias ; Vermet, Franck

Author_Institution

Dept. of Math. & Comput. Sci., Eindhoven Univ. of Technol.

Volume

52

Issue

10

fYear

2006

Firstpage

4733

Lastpage

4741

Abstract

In this correspondence, we study a lightly loaded code-division multiple-access (CDMA) system with and without multistage hard- and soft-decision parallel interference cancelation (HD-PIC and SD-PIC). Throughout this paper we will only consider the situation of a noiseless channel, equal powers and random spreading codes. For the system with no or a fixed number of steps of interference cancelation, we give a lower bound on the maximum number of users such that the probability for the system to have no bit-errors converges to one. Moreover, we investigate when the matched filter system, where parallel interference cancelation is absent, has bit errors with probability converging to one. This implies that the use of HD-PIC and SD-PIC significantly enhances the number of users the system can serve

Keywords

channel coding; code division multiple access; error statistics; interference suppression; matched filters; probability; random codes; CDMA; HD-PIC; bit error analysis; code-division multiple-access system; hard-decision parallel interference cancellation; matched filter system; noiseless channel; probability; random spreading code; soft-decision PIC; 3G mobile communication; Frequency; History; Interference cancellation; Matched filters; Mobile communication; Multiaccess communication; Multiple access interference; Multiuser detection; Noise cancellation; Bit-error analysis; code-division multiple access; large deviations; matched filter; number of users; parallel interference cancellation;

fLanguage

English

Journal_Title

Information Theory, IEEE Transactions on

Publisher

ieee

ISSN

0018-9448

Type

jour

DOI

10.1109/TIT.2006.881697

Filename

1705035