( 3 ) interleave technology is used to deal with group errors . the interleaver can break the data sequence , and weaken the pertinence of the data sequence before and after interleaved . so it reduced the harms made by burst errors
2.
Considersing that , this paper defines the criterion called grouping error and shows the best data - grouping method is the one which gets the minimum grouping error . this method makes up the lack of ability in determining the number of groups in previous methods