Title :
Discrete adaptation of type-II hybrid-ARQ in DS-CDMA
Author :
Oteng-Amoako, Kingsley ; Nooshabadi, Saeid
Author_Institution :
Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia
Abstract :
The paper presents an optimisation strategy based on discrete adaptation of the code rate given the modulation scheme in direct spread code division multiple access (DS- CDMA) communication system. The adaptive algorithm maximizes spectral efficiency across a fading channel by transmitting an optimal amount of incremental bits on each transmit attempts. The justification presented is based on a type-II hybrid-ARQ employing turbo punctured codes with multilevel signalling.
Keywords :
automatic repeat request; code division multiple access; fading channels; optimisation; spread spectrum communication; telecommunication signalling; turbo codes; DS-CDMA; adaptive algorithm; automatic repeat request; direct spread code division multiple access communication system; discrete adaptation; fading channel; multilevel signalling; optimisation strategy; turbo punctured codes; type-II hybrid-ARQ; Automatic repeat request; Constellation diagram; Decoding; Diversity reception; Fading; Forward error correction; Information analysis; Modulation coding; Multiaccess communication; Turbo codes;
Conference_Titel :
Communications, 2003. APCC 2003. The 9th Asia-Pacific Conference on
Print_ISBN :
0-7803-8114-9
DOI :
10.1109/APCC.2003.1274358
