Analysis, Design and Iterative Decoding of Double Serially Concatenated Codes with Interleavers
A double serially concatenated code with two interleavers consists of the cascade of an outer encoder, an interleaver permuting the outer codeword bits, a middle encoder, another interleaver permuting the middle codeword bits and an inner encoder whose input words are the permuted middle codewords.
encoder interleaver permuting algorithm concatenat↗