MC-CDMA HARQ with variable spreading factor

Shinsuke Takaoka, Haris Gacanin, Fumiyuki Adachi

研究成果: Conference contribution

抄録

This paper presents a hybrid automatic repeat request (HARQ) with variable spreading factor (VSF) suitable for a multicarrer code division multiple access (MC-CDMA). We consider a HARQ based on incremental redundancy (IR) strategy. The throughput of MC-CDMA HARQ is a tradeoff among the frequency diversity gain, the coding gain and the inter-code interference (ICI). In order to effectively exploit the channel frequency-selectivity and the channel coding, the spreading factor is changed between the initial transmission and the succeeding retransmissions. The throughput performance of HARQ with VSF in a frequency-selective Rayleigh fading channel is evaluated by the computer simulation and compared with that with fixed spreading factor (FSF). It is shown that HARQ with VSF can provide better throughput performance than with FSF and is particularly useful when high-level modulation (e.g., 16QAM and 64QAM) is used. The impacts of fading correlation between packet retransmissions and the channel frequency-selectivity on achievable throughput performance are discussed.

本文言語English
ホスト出版物のタイトル2006 IEEE 63rd Vehicular Technology Conference, VTC 2006-Spring - Proceedings
ページ2063-2067
ページ数5
出版ステータスPublished - 2006
外部発表はい
イベント2006 IEEE 63rd Vehicular Technology Conference, VTC 2006-Spring - Melbourne, Australia
継続期間: 2006 5月 72006 7月 10

出版物シリーズ

名前IEEE Vehicular Technology Conference
4
ISSN(印刷版)1550-2252

Other

Other2006 IEEE 63rd Vehicular Technology Conference, VTC 2006-Spring
国/地域Australia
CityMelbourne
Period06/5/706/7/10

ASJC Scopus subject areas

  • コンピュータ サイエンスの応用
  • 電子工学および電気工学
  • 応用数学

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