| 主权项 |
1. A computer program product for iterative read channel operation, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a controller to cause the controller to:
store, by the controller, a block of signal samples to a memory, the signal samples being read from a magnetic tape; execute, by the controller, one or more digital front-end (DFE) functions on the block of signal samples employing a set of decisions provided by a detector executing a detection algorithm; execute, by the controller, a decoding algorithm of an error correcting code (ECC) on the signal samples using a decoder employing the set of decisions provided by the detector to generate a set of decisions provided by the decoder; store the signal samples, the set of decisions provided by the detector, and the set of decisions provided by the decoder; and in an iterative process until a maximum number of iterations has been reached or a valid codeword is produced:
execute the one or more DFE functions on the signal samples employing the set of decisions provided by the decoder;execute the detection algorithm on the signal samples using the detector employing the set of decisions provided by the decoder to regenerate the set of decisions provided by the detector;execute the decoding algorithm of the ECC using the set of decisions provided by the detector to regenerate the set of decisions provided by the decoder;output decoding information relating to the signal samples when the decoding algorithm produces a valid codeword; andstore the signal samples, the set of decisions provided by the detector, and the set of decisions provided by the decoder when the decoding algorithm does not produce a valid codeword. |
