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 in a determined proportion to yield a combined detector output, wherein the determined proportion is selected from a group consisting of:
• a first proportion when a data decoding algorithm failed to converge and a number of global iterations is less than a threshold value or a second proportion when the data decoding algorithm failed to converge and the number of global iterations is greater than the threshold value;
• and
• a first proportion when a number of unsatisfied checks remaining in a decoded output is non-zero and exceeds a threshold value, and a second proportion when the number of unsatisfied checks is non-zero and is less than the threshold value;
• and
• applying the data decoding algorithm using a data decoder circuit to a decoder input derived from the combined detector output to yield a decoded output and the number of unsatisfied checks remaining in the decoded output, wherein applying the data detection algorithm and applying the data decoding algorithm at least one time corresponds to the global iteration.

A data processing system, the data processing system comprising:

• a data detector circuit operable to apply a data detection algorithm to a 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;
• 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 and a number of unsatisfied checks;
• and
• wherein the combining circuit is operable to combine the first input with the second input in a first proportion when the number of unsatisfied checks is non-zero and exceeds a threshold value, and a second proportion when the number of unsatisfied checks is non-zero and is less than the threshold value.

A data processing system, the data processing system comprising:

• a data detector circuit operable to apply a data detection algorithm to a 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;
• 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 and a number of unsatisfied checks;
• and
• wherein the combining circuit is further operable to generate a quality metric indicative of a quality of an element of the first input, and wherein the combining circuit is operable to combine the first input with the second input in a first proportion when a number of unsatisfied checks after application of the data decoding algorithm is non-zero and the quality metric exceeds a threshold value, and a second proportion when the number of unsatisfied checks is non-zero and the quality metric is less than the threshold value.