Systems and Methods for Data Processing Using Global Iteration Result Reuse

A method for data processing, the method comprising:

• applying a data detection algorithm using a data detector circuit to a data input to yield a first detector output;
• re-applying the data detection algorithm using the data detector circuit to the data input to yield a second detector output;
• combining a first input derived from the first detector output with a second input derived from the second detector output to yield a combined detector output;
• and
• applying a data decoding algorithm using a data decoder circuit to a decoder input derived from the combined detector output to yield a decoded output.

A storage device, the storage device comprising:

• a storage medium;
• a head assembly disposed in relation to the storage medium and operable to provide a sensed signal corresponding to a data set on the storage;
• a read channel circuit including:
• an analog front end circuit operable to provide an analog signal corresponding to the sensed signal;
• an analog to digital converter circuit operable to sample the analog signal to yield a series of digital samples;
• an equalizer circuit operable to equalize the digital samples to yield a data input;
• a data detector circuit operable to apply a data detection algorithm to the data input to yield a first detector output, and to reapply the data detection algorithm to the data input to yield a second detector output;
• a combining circuit operable to combine a first input derived from the first detector output with a second input derived from the second detector output to yield a combined detector output;
• and
• a data decoder circuit operable to apply a data decoding algorithm to a decoder input derived from the combined detector output to yield a decoded output.