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Turbo decoding for partial response channels using spinstand data

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3 Author(s)
T. Souvignier ; Texas Instrum. Inc., Longmont, CO, USA ; Z. Keirn ; C. Xu

The partial response channel can be viewed as a rate-1 encoder in which the output alphabet differs from the input alphabet. In serially concatenated coding schemes, the partial response channel can serve as the inner encoder. Recent works on the application of turbo decoding techniques to partial response channels have used channel models to investigate system performance. While the models provided some insight into the performance of turbo decoding techniques, performance in a real system, with electronic and signal-dependent media noise, remained unknown. This paper will demonstrate the performance of turbo decoding techniques using real and modeled spinstand data. A simple serial concatenation system will be presented that uses as its outer code a single convolutional code and as its inner code the partial response channel. Significant gains will be shown over QMTR coded systems

Published in:

IEEE Transactions on Magnetics  (Volume:36 ,  Issue: 5 )