Adaptation of turbo punctured codes for hybrid-ARQ

Author

Oteng-Amoako, Kingsley ; Yuan, Jinhong ; Nooshabadi, Saeid

Author_Institution

Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia

Volume

3

fYear

2003

fDate

6-9 Oct. 2003

Firstpage

1853

Abstract

The paper presents an iterative process of the selection of modulation and code rate in order to achieve performance close to the maximum supportable data rate of a given channel. The code rate and modulation choosing process is employed for the design of packet-based hybrid-automatic repeat request (hybrid-ARQ) schemes in direct sequence code division multiple access (DS-CDMA) systems. We consider a turbo encoder with quadrature phase shift keying (QPSK) for modulation at low SNR´s and multilevel quadrature amplitude modulation (M-QAM) for medium to high SNR´s, with adaptation in slow Rayleigh fading channels. The performance of the optimization is verified by computer simulation.

Keywords

Rayleigh channels; automatic repeat request; channel coding; code division multiple access; iterative methods; quadrature amplitude modulation; quadrature phase shift keying; spread spectrum communication; turbo codes; DS-CDMA systems; Rayleigh fading channels; code rate; iterative process; multilevel quadrature amplitude modulation; packet-based hybrid-automatic repeat request; quadrature phase shift keying modulation; turbo punctured codes; Automatic repeat request; Diversity reception; Fading; Modulation coding; Multiaccess communication; Quadrature amplitude modulation; Quadrature phase shift keying; Turbo codes; Wideband; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th

ISSN

1090-3038

Print_ISBN

0-7803-7954-3

Type

conf

DOI

10.1109/VETECF.2003.1285346

Filename

1285346