| Summary: | 碩士 === 元智大學 === 通訊工程學系 === 97 === This thesis mainly concerns about the state-of-art methods on unequal error protected (UEP) fountain codes. The basic fountain codes such as random linear fountain codes, Luby Transform (LT) codes and Raptor codes are first introduced. Next, four existing UEP fountain codes use sliding windows, block duplication, priorities, expanding windows are examined. Besides we have made performance comparison among these methods, we propose some intuitive solutions to create more UEP classes on the sliding windows and priorities cases. In order to improve the failure rates of these codes, Raptor codes which integrates LDPC codes as outer codes and these UEP fountain codes as inner codes are also discussed in this thesis.
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