【弱问】有关二次交织的问题
时间：03-03
整理：3721RD
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如题。
二次交织的时候的列置换规则是怎么产生的呢？请问大牛，我看规范不太明白。
<0, 20, 10, 5, 15, 25, 3, 13, 23, 8, 18, 28, 1, 11, 21,
6, 16, 26, 4, 14, 24, 19, 9, 29, 12, 2, 7, 22, 27, 17>
Perform the inter-column permutation for the matrix based on the pattern that is shown in table 7, where P2(j) is the original column position of the j-th permuted column.
二次交织的时候的列置换规则是怎么产生的呢？请问大牛，我看规范不太明白。
<0, 20, 10, 5, 15, 25, 3, 13, 23, 8, 18, 28, 1, 11, 21,
6, 16, 26, 4, 14, 24, 19, 9, 29, 12, 2, 7, 22, 27, 17>
Perform the inter-column permutation for the matrix based on the pattern that is shown in table 7, where P2(j) is the original column position of the j-th permuted column.
交织采用的是矩阵算法，应该很简单，横竖变换而已