Interleaver e.g. intra-row almost rectangular interleaver, for use in e.g. turbo encoder for scrambling information word, has interleaver stage for reading columns, and for arranging digits of row to one another without gap

摘要

The interleaver has an interleaver stage for line-by-line arrangement of binary digits of information word in multiple rows and columns. Another interleaver stage scrambles the digits of one of the rows with a gap by interchanging two digits of the row, such that a position of the gap remains unchanged, in order to obtain a scrambled row, and to replace the row by the scrambled row. The former interleaver stage reads columns in a column by column manner, and arranges digits of the row to one another without the gap, to obtain a permuted information word. Independent claims are also included for the following: (1) a method for scrambling an information word (2) an index generator for generating an output index based on an input index of a number of columns (3) a computer program having instructions to perform a method for scrambling an information word.