Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285346
