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Tree-Based Construction of LDPC Codes

We present a construction of LDPC codes that have minimum pseudocodeword weight equal to the minimum distance, and perform well with iterative decoding. The construction involves enumerating a d-regular tree for a fixed number of layers and employing a connection algorithm based on mutually orthogonal Latin squares to close the tree. Methods are presented for degrees d=p^s and d = p^s+1, for p a prime, -- one of which includes the well-known finite-geometry-based LDPC codes.

preprint2005arXivOpen access
Deepak SridharaChristine KelleyJoachim Rosenthal
math.ITInformation Theory
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Deepak SridharaChristine KelleyJoachim Rosenthal

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