| 摘要 |
An interleaver receives incoming data frames of size N. The interleaver indexes the elements of the frame with an N1xN2 index array. The interleaver then effectively rearranges (permutes) the data by permuting the rows of the index array. The interleaver employs the equation I(j,k)=I(j,alphajk+betaj)modP) to permute the columns (indexed by k) of each row (indexed by j). P is at least equal to N2, betaj is a constant which may be different for each row, and each alphaj is a relative prime number relative to P. After permuting, the interleaver outputs the data in a different order than received (e.g., receives sequentially row by row, outputs sequentially each column by column).
|
