Principles of Turbo Codes and Their Application to Mobile Communications

Akihisa USHIROKAWA  Toshihiko OKAMURA  Norifumi KAMIYA  Branka VUCETIC  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E81-A   No.7   pp.1320-1329
Publication Date: 1998/07/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: INVITED PAPER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network)
Turbo codes,  iterative decoding,  MAP,  SOVA,  mobile communication,  

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This paper gives an overview of Turbo codes principles, performance, and design issues for practical application. As fundamentals of Turbo codes, encoder structure, interleaver, and iterative decoding are explained. The performance is analyzed through their weight distribution, and the analysis gives code design rules for component codes. Practical decoding algorithms are presented in addition to MAP algorithm. Design issues are discussed for mobile communications as an example of practical application. Finally, research trends are briefly mentioned.