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Raptor code is a kind of new fountain code which usually adopts belief propagation(BP) decoding algorithm. In order to improve the decoding success probability of Raptor code, this paper proposes two methods. On the one hand, we adopt a new construction method of check matrix for LDPC code, which can effectively avoid the girth of 4. On the other hand, we analyze and simulate the number of stopping...
In this paper, we illustrate how to use simple LDPC codes to build a GPRAM prototype. We overview the GPRAM system and design principles. We then map the design into a problem. We demonstrate an experimental solution. We further introduce a switch function in the system, which will allow us to perform revision in code structures in GPRAM prototype in future. In this study many interesting features...
In this paper, we continue our journey on how to use simple LDPC codes to build a GPRAM prototype. We examine a switch function in the system which will allow us to perform revision in code structures in the GPRAM prototype in future. In this study we focus on how to improve learning for three-state systems; how to learn using perfect codewords; and finally how to perform progressive learning methods...
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