A Chase-GMD Algorithm for Soft-Decision Decoding of Reed-Solomon Codes on Perpendicular Recording Channels

We propose a soft-decision Reed-Solomon (RS) decoding algorithm, which uses the combined approaches of the Chase and the generalized minimum distance (GMD) algorithms and exploits the recursive property of interpolation-based RS decoding algorithms. We evaluate the performance of this Chase- GMD type algorithm on perpendicular magnetic recording systems, and present simulation results that show that we can achieve better performance with fairly short latency and lower decoding complexity than the current state-of-art algorithms.