Title :
Soft decision decoding of a bit-interleaved convolutionally encoded code division multiple access system over Rayleigh fading channels
Author_Institution :
Dept. of Mobile Syst., GTE Labs. Inc., Waltham, MA, USA
Abstract :
The author investigates the performance of a bit-interleaved convolutionally encoded code division multiple access (CDMA) communication system with feedback power control over mobile radio channels. The analytical formulas for both optimal and suboptimal bit likelihood ratios, to be used as soft decision metrics for the decoder, are derived for noncoherent detection, with and without diversity reception. The resulting optimal bit soft decisions provide a decoded BER of 0.1% with 1.0-1.2 dB less power than that required for hard decisions in the proposed North American CDMA digital cellular system
Keywords :
cellular radio; code division multiple access; convolutional codes; decoding; digital radio systems; diversity reception; fading; feedback; mobile radio systems; BER; CDMA; North American digital cellular system; Rayleigh fading channels; bit-interleaving; code division multiple access; convolutional encoding; diversity reception; feedback power control; mobile radio channels; noncoherent detection; optimal bit likelihood ratio; soft decision decoding; soft decision metrics; suboptimal bit likelihood ratio; Binary sequences; Convolution; Convolutional codes; Decoding; Error correction; Error correction codes; Fading; Multiaccess communication; Power control; Time division multiple access;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1992. Proceedings, PIMRC '92., Third IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0841-7
DOI :
10.1109/PIMRC.1992.279950
