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

Kazuaki Takeda; Fumiyuki Adachi

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

Kazuaki Takeda, Fumiyuki Adachi

Research Organization of Electrical Communication (ROEC)

Research output: Contribution to journal › Conference article › peer-review

6 Citations (Scopus)

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-inference (ICI) degrades the BER performance. In this paper, 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 N ₀ for achieving a BER=10 ^-4 is as much as about 4.2 dB when the spreading factor SF=4. Joint use of antenna diversity combining and ICI cancellation is also presented.

Original language	English
Pages (from-to)	2316-2320
Number of pages	5
Journal	IEEE Vehicular Technology Conference
Volume	60
Issue number	4
Publication status	Published - 2004 Dec 1
Event	2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States Duration: 2004 Sep 26 → 2004 Sep 29

Keywords

DS-CDMA
Frequency-domain equalization
ICI cancellation

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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title = "Inter-chip interference cancellation for DS-CDMA with frequency-domain equalization",

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-inference (ICI) degrades the BER performance. In this paper, 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 N 0 for achieving a BER=10 -4 is as much as about 4.2 dB when the spreading factor SF=4. Joint use of antenna diversity combining and ICI cancellation is also presented.",

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T1 - Inter-chip interference cancellation for DS-CDMA with frequency-domain equalization

AU - Takeda, Kazuaki

AU - Adachi, Fumiyuki

PY - 2004/12/1

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N2 - 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-inference (ICI) degrades the BER performance. In this paper, 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 N 0 for achieving a BER=10 -4 is as much as about 4.2 dB when the spreading factor SF=4. Joint use of antenna diversity combining and ICI cancellation is also presented.

AB - 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-inference (ICI) degrades the BER performance. In this paper, 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 N 0 for achieving a BER=10 -4 is as much as about 4.2 dB when the spreading factor SF=4. Joint use of antenna diversity combining and ICI cancellation is also presented.

KW - DS-CDMA

KW - Frequency-domain equalization

KW - ICI cancellation

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