Title :
Comparative study of turbo decoding techniques: an overview
Author :
Woodard, Jason P. ; Hanzo, Lajos
Author_Institution :
Dept. of Electr. & Comput. Sci., Southampton Univ., UK
fDate :
11/1/2000 12:00:00 AM
Abstract :
We provide an overview of the novel class of channel codes referred to as turbo codes, which have been shown to be capable of performing close to the Shannon limit. We commence with a discussion on turbo encoding, and then move on to describing the form of the iterative decoder most commonly used to decode turbo codes. We then elaborate on various decoding algorithms that can be used in an iterative decoder, and give an example of the operation of such a decoder using the so-called soft output Viterbi (1996) algorithm (SOVA). Lastly, the effect of a range of system parameters is investigated in a systematic fashion, in order to gauge their performance ramifications
Keywords :
Gaussian channels; Rayleigh channels; Viterbi decoding; channel coding; iterative decoding; reviews; turbo codes; Gaussian channels; MAP algorithm; Rayleigh channels; SOVA; Shannon limit; channel codes; decoding algorithms; iterative decoder; performance; soft output Viterbi algorithm; system parameters; turbo codes; turbo decoding techniques; Bit error rate; Computer science; Delay systems; Iterative algorithms; Iterative decoding; Land mobile radio; Multimedia communication; Performance gain; Turbo codes; Viterbi algorithm;
Journal_Title :
Vehicular Technology, IEEE Transactions on
