LDPC Decoding: VLSI Architectures and Implementations

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Data Flow Flash Memory Summit 2013 Santa Clara, CA 22 Parameters used here: r row degree=25, c column degree =3
Irregular QC-<strong>LDPC</strong> H Matrices Different base matrices to support different rates. Different expansion factors (z) to support multiple lengths. All the shift coefficients for different codes for a given rate are obtained from the same base matrix using modulo arithmetic Flash Memory Summit 2013 Santa Clara, CA 23
Page 1 and 2: LDPC Decoding: VLSI Architectures a
Page 3 and 4: LDPC Decoding, Quick Recap 1/5 Bit
Page 5 and 6: LDPC Decoding, Quick Recap 3/5 Nota
Page 7 and 8: LDPC Decoding, Quick Recap 5/5 (B)
Page 9 and 10: Check Node Unit (CNU) Design ( i) i
Page 11 and 12: CNU Micro Architecture for minsum F
Page 13 and 14: Example QC-LDPC Matrix H = ⎡I ⎢
Page 15 and 16: Non-Layered Decoder Architecture Su
Page 17 and 18: Non-Layered Decoder Architecture fo
Page 19 and 20: Layered Decoder Architecture Optimi
Page 21: Data Flow Diagram Flash Memory Summ
Page 25 and 26: Irregular QC-LDPC H Matrices E
Page 27 and 28: Data Flow Diagram Flash Memory Summ
Page 29 and 30: Illustration for out-of-order proce
Page 31 and 32: Out-of-order block processing for P
Page 33 and 34: Memory organization • Q memory wi
Page 35 and 36: Parallel CNU Flash Memory Summit 20
Page 37 and 38: Block Parallel Layered Decoder Comp
Page 39 and 40: Layered Decoder Throughput Results-
Page 41 and 42: Layered Decoder for Flash Channel D
Page 43 and 44: Design considerations • The desig
Page 45 and 46: Some of architecture variations, 1/
Page 47 and 48: Architecture Variations, 3/5 FS MES
Page 49 and 50: 1428 Architecture Variations, 5/5 C
Page 51: References [Contd] & Important Info

LDPC Decoding: VLSI Architectures and Implementations

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