Frequency-domain channel estimation using FFT/IFFT for DS-CDMA mobile radio

Author

Takaoka, Shinsuke ; Adachi, Fumiyuki

Author_Institution

Graduate Sch. of Eng., Tohoku Univ., Sendai, Japan

Volume

1

fYear

2004

Firstpage

694

Abstract

Coherent rake reception of direct sequence code division multiple access (DS-CDMA) signals requires accurate channel estimation in a frequency-selective fading channel. This paper studies a code-multiplexed pilot-assisted frequency-domain channel estimation using FFT/IFFT, which has a good tracking capability against fast fading and can reduce the effect of noise and interpath interference (IPI). The average bit error rate (BER) performance of rake combining in a time- and frequency-selective fading channel is theoretically evaluated and confirmed by computer simulation. It is shown that the frequency-domain channel estimation, using a code-multiplexed pilot, is very robust against fast fading.

Keywords

channel estimation; code division multiple access; error statistics; fading channels; fast Fourier transforms; mobile radio; spread spectrum communication; BER; DS-CDMA mobile radio; FFT/IFFT; IPI; average bit error rate; code-multiplexed channel estimation; coherent rake reception; fast fading tracking capability; frequency-domain channel estimation; frequency-selective fading channel; interpath interference; pilot-assisted channel estimation; rake combining; time-selective fading channel; Bit error rate; Channel estimation; Computer simulation; Direct-sequence code-division multiple access; Frequency-selective fading channels; Interference; Land mobile radio; Multiaccess communication; Noise reduction; Noise robustness;

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.2004.1400097

Filename

1400097