Inter-chip interference cancellation for DS-CDMA with frequency-domain equalization

Author

Takeda, Kazuaki ; Adachi, Fumiyuki

Author_Institution

Dept. of Electr. & Commun. Eng., Tohoku Univ., Japan

Volume

4

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

2316

Abstract

The bit error rate (BER) performance of DS-CDMA in a frequency-selective fading channel can be significantly improved by the use of frequency-domain equalization (FDE). However, for a small spreading factor (SF), the residual inter-chip-interference (ICI) degrades the BER performance. We propose three types of ICI cancellation and the BER performance improvement is evaluated by computer simulation. The ICI replica is generated and subtracted from the FDE-equalized chip sequence. The reduction in E_b/N₀ for achieving a BER=10^-4 is as much as about 4.2 dB when SF=4. Joint use of antenna diversity combining and ICI cancellation is also presented.

Keywords

Rayleigh channels; code division multiple access; diversity reception; equalisers; error statistics; frequency-domain analysis; interference suppression; multipath channels; spread spectrum communication; BER; DS-CDMA; E_b/N₀; Rayleigh channel; antenna diversity combining; bit error rate; chip sequence; frequency-domain equalization; frequency-selective channel; frequency-selective fading channel; inter-chip interference cancellation; multipath channel; spreading factor; Bit error rate; Computer simulation; Data communication; Degradation; Delay effects; Diversity reception; Frequency diversity; Frequency-selective fading channels; Interference cancellation; Multiaccess communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1400466

Filename

1400466