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VLSI architectures for iterative decoders in magnetic recording channels

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4 Author(s)
Engling Yeo ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; P. Pakzad ; B. Nikolic ; V. Anantharam

VLST implementation complexities of soft-input soft-output (SISO) decoders are discussed. These decoders are used in iterative algorithms based on Turbo codes or Low Density Parity Check (LDPC) codes, and promise significant bit error performance advantage over conventionally used partial-response maximum likelihood (PRML) systems, at the expense of increased complexity. This paper analyzes the requirements for computational hardware and memory, and provides suggestions for reduced-complexity decoding and reduced control logic. Serial concatenation of interleaved codes, using an outer block code with a partial response channel acting as an inner encoder, is of special interest for magnetic storage applications

Published in:

IEEE Transactions on Magnetics  (Volume:37 ,  Issue: 2 )