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UNIFIED H-ENCODER FOR A CLASS OF MULTI-RATE LDPC CODES
UNIFIED H-ENCODER FOR A CLASS OF MULTI-RATE LDPC CODES
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机译:一类多速率LDPC编码的统一H编码器
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摘要
A quasi-cyclic LDPC encoding apparatus is disclosed wherein a matrix H of the form [0 T; D E] is used, where T is a triangular matrix and D and E are arbitrary matrices selected to improve encoding performance. T and E vary with the size of an encoded data word whereas D is maintained constant. T and E are sparse such that encoding operations performed on them are computationally simple. Likewise D and its inverse are constant and pre-computed further reducing computation. T, E, and D and the inverse of D may be constrained to be quasi-cyclic, which reduces storage required to represent them and enables the performance of encoding operations using shift registers.
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