期刊
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
卷 16, 期 1, 页码 127-153出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/SURV.2013.050813.00137
关键词
EXIT charts; convolutional codes; turbo codes; concatenated codes; mutual information
资金
- RC-UK under India-UK Advanced Technology Centre (IU-ATC)
- EU's Concerto project
- EPSRC [EP/J016640/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J016640/1] Funding Source: researchfish
Near-capacity performance may be achieved with the aid of iterative decoding, where extrinsic soft information is exchanged between the constituent decoders in order to improve the attainable system performance. Extrinsic Information Transfer (EXIT) charts constitute a powerful semi-analytical tool used for analysing and designing iteratively decoded systems. In this tutorial, we commence by providing a rudimentary overview of the iterative decoding principle and the concept of soft information exchange. We then elaborate on the concept of EXIT charts using three iteratively decoded prototype systems as design examples. We conclude by illustrating further applications of EXIT charts, including near-capacity designs, the concept of irregular codes and the design of modulation schemes.
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