Constellation rearrangement and spreading code rearrangement for hybrid ARQ in MC-CDMA

Author

Miyoshi, Kenichi ; MATSUMOTO, Atsushi ; Wengerter, C. ; Kasapidis, Makis ; Uesugi, Mitsuru ; Kato, Osamu

Author_Institution

Wireless Solution Labs., Matsushita Commun. Ind. Co. Ltd., Kanagawa, Japan

Volume

2

fYear

2002

fDate

27-30 Oct. 2002

Firstpage

668

Abstract

This paper presents two techniques that rearrange the data between retransmissions and can enhance the diversity gain from hybrid ARQ (hybrid automatic repeat request). One is constellation rearrangement that rearranges the signal constellation of QAM signals between retransmissions. The other is spreading code rearrangement that changes the spreading code with which the same symbol is transmitted in each retransmission. Simulation results show that those proposed schemes outperform type-H hybrid ARQ with packet combining, or chase combining.

Keywords

automatic repeat request; code division multiple access; mobile radio; quadrature amplitude modulation; MC-CDMA; QAM signals; constellation rearrangement; diversity; hybrid ARQ; hybrid automatic repeat request; signal constellation; spreading code rearrangement; Automatic repeat request; Bandwidth; Constellation diagram; Diversity methods; Fading; Laboratories; Multiaccess communication; Multicarrier code division multiple access; Switches; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Personal Multimedia Communications, 2002. The 5th International Symposium on

ISSN

1347-6890

Print_ISBN

0-7803-7442-8

Type

conf

DOI

10.1109/WPMC.2002.1088258

Filename

1088258